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Патент USA US2411282

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Nov. 19, 1946. ~
2,411,282
(2. A. MANN
FLUID OPERATED MOTOR
8 Sheets—Sheet 1
Filed Aug‘. 5, 1943
4
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'
INVENTOR.
'
(it/L 417M»:
ATTORNEY. f
Nov. 19, 1946.
¢_ A, MANN
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' 2,411,282‘
FLUID OPERATED MOTOR
Filed Aug. 5, 1943
s Sheets-Sheet 2
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INVENTOR.
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ATTORNEY.
Nov. 19, 1946.
c. A. MANN
2,41 1 ,282
FLUID OPERATED MOTOR
Filed Aug. 5, 1943
8 Sheets-Sheet 5
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INVENTOR.
CECIL A. MANN
BY
ATTORNEY.
Nov. 19, 1946.
2,411,282
c. A. MANN
FLUID OPERATED MOTOR
Filed Aug. 5, 1943
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BY
ATLFORNEY.
NOV. 19, 1946.
Q A_ MANN
FLUID OPERATED MOTOR
Filed Aug. 5, 1943
I 2,411,282
'
8 Sheets-Sheet 5
9;; v/6
ATTORNEY
Nov. 19, 1946.
c. A. MANN
2,411,282
FLUID OPERATED MOTOR
Filed Aug. 5, 1943
76
72
8 Sheets-Sheet 6
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IHVEI‘ITOR
(m; A. MAM‘
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Nov. 19, 1946
2,411,282
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2,41l,282
Patented Nov. 19, 1946
UNITED STATES PATENT OFFICE
2,411,282
FLUID OPERATED MOTOR
Cecil A. Mann, Dayton, Ohio
Application August 5, 1943, Serial No. 497,419
30 Claims. (01. 121--89)
2
1
This invention relates to a ?uid operated motor,
and it is an object of the invention to provide
such a motor capable or operating at very high
speeds without vibration and which will be of ‘light
weight with relation to the power developed.
A further object of the invention is to provide
such a motor in which the arrangement and
relative movements of the cooperating parts are
such as to maintain proper hydraulic balance at
through one of the ports; Fig. 20 is an axial eleva
tion of the blade carrier; Fig. 21 is a front eleva
all speeds.
A further object of the invention is to provide
motor on a line corresponding to the line B-C;
Fig. 25 is a complete transverse section taken
on the line A—B of Fig. 23; and Fig. 26 is a com
plete transverse section taken through one of
the outlet conduits substantially on the line
C--B.
In these drawings I have illustrated certain
embodiments of the invention, in each of which
the invention is shown as embodied in a small
such a motor in which all mechanical rotation is
about a single ?xed point or axis.
A further object of the invention is to provide
a fluid displacement device which will operate
smoothly and quietly at all speeds and in which
surfaces of the desired contour may be easily and
accurately formed.
‘
tion, partly in section, of the blade carrier; Fig. 22
is a diagrammatic'lay-out of the motor of Fig. 16;
Fig. 23 is a radial section of a modi?cation of the
motor of Fig. 16; Fig. 24 is a sectional view of the
motor of Fig. 23, the upper portion being taken
on the line A--B of Fig. 23 and the lower portion
being taken through the lower portion of the
A further object of the invention is to provide
size high speed hydraulic motor, the drawings be
7 such a motor in which the end thrust and radial
ing on an enlarged scale. It is to be under
stood, however, that the invention may be em
thrust on the abutment forming blades will be
reduced to a minimum.
A further object of the invention is to provide
a motor of such a construction that various con
tacting parts thereof may be lapped to provide
tightly sealed joints between the same.
Other objects of the invention may appear as
the motor is described in detail.
In the accompanying drawings Fig. 1 is a side
view of a motor embodying the invention, partly
in section and partly broken away; Fig. 2 is a
transverse sectional view on the line 2—-2 of Fig.
bodied in ?uid displacement devices of various
kinds and sizes and that the device, and the
several parts thereof, may take various forms
without departing from the spirit of the inven
tion; and, further, that the device may be used
either as a motor or as a pump and the term
“motor” in the speci?cation and claims is used
as a word of description and not as a limitation.
In its broader aspects the motor herein illus
trated comprises an outer casing adapted to be
supported about a shaft, an annular blade car
1; Fig. 3 is a side elevation, partly in section, of
the motor and its supporting structure; Fig. 4
rier arranged within the casing, blades carried by
the blade carrier and movable transversely there
is an end view, partly broken away, of the struc
ture shown in Fig. 3; Fig. 5 is a detail View, partly
in section, of the blade carrier; Fig. 6 is a similar
view of one of the intermediate ‘frame members
of the casing; Fig. 7 is a similar view of one of
the end frame members of the casing; Fig. 8
is a similar view of a locking nut; Fig. 9 is a
to, cams arranged on the opposite sides of the
similar View of the inlet port member; Fig. 10
is a similar view of the cam member; Fig. 11 is a
similar view of the outlet port member; Fig. 12
is a side elevation of one of theiblades; ‘Fig. 13
is an edge view of the blade looking toward the
inner side thereof; Fig. 14 is a diagrammatic
lay-out of the motor of Fig. 1; Fig. 15is a sec
tional view‘showing a slight modi?cation of the
blade carrier and having sliding contact with the
blades and shaped to form between the same and
the blade carrier work chambers into and out of
which the end portions of the blades are moved
by the action of the cams thereon, and means
for supplying ?uid to and exhausting the same
from the work chambers. In the construction
illustrated in Fig. 1 the blade carrier is shown as
stationary and the cams as rotatable but this is
not essential and the blade carrier may be rotat
able and the cams stationary without departing
from the essentials of the invention. Further,
various features of the invention may be em
bodied in a motor having a work chamber, or work
motor of Fig. 1; Fig. 16 is a side elevation, partly 50 chambers, on one side only of the blade carrier.
One of the more important purposes of the in
in section, of another embodiment of the inven
vention is to provide a ?uid displacement device
tion; Fig. 17 is an axial View of one of the cams
of the motor of Fig. 16; Fig.’ 18 is a front eleva
tion, partly in section, of said cam; Fig. 19 is a
in which the working surface of an element, such
as the blade actuating element or cam of a de
sectional detail of said cam on a line extending 55 vice of the expansible chamber type or a corre
2,411,282;
5
surface of the cam is a conical surface of varying
angles having a common apex at the center of
the spheres and can be easily and accurately
ground by a frusto-conical grinder having its apex
coincident with the apex of said cones. The cam
surfaces“ of the two cam‘members: are ‘spaced
one from the other the‘saine distance at all op
posed circumferential points, that is, the points
6
the overall length of the motor and ‘having at
one end a ?ange 56 which has running clearance
with the shaft 2| and having‘ at the other end a
threaded boss 56a to receive a ‘nut 51 provided
with an inwardly extending ?ange 58 which also
has, running, clearance with the shaft. Inter
posed-between the ?anges 55 and 58 and the
respective end frames 45 of the motor casing
are annular spacing members 59 which abut
contacted by the ends of any one blade, which
points may or may not be in a line at right angles 10 against the respective end members 45‘s0 that
upon the tightening down of the nut 57 the parts
to the plane of rotation, and the blades 21 are
of the motor casing will be clamped ?rmly‘ one
of a length equal to the distance between the
‘ against the other and the, casing will be held
cam. surfaces, so that the rotation of the cams
against movement with relation to the tubular
with relation to the blade carrier will cause the
end. portions of the blades to move successively 15 structure 55. ,This tubular supporting structure
is provided with a passage 50 communicating with
into and out of the work chambers.
The casing 20 comprises intermediate annular
frame'members 44 and end frame members 45.
The intermediateframe members 44 have‘their
inner surfaces 46 conforming to sections of a
spherehaving its center at the axis of the shaft,
as shown ‘at 23, and therefore conform to the
exterior surface of the blade carrier and consti
tute the outerwalls of the blade slots 24. The
adjacent inner portions of these frame members
the inlet 48 leading to the inlet channel 41 and
the outer portion of this passage is threaded to
enable the same to be connected with a supply
conduit for ?uid under pressure. The tubular
member is also provided with circumferential
channels 6| leading to the exhaust channels 49,
and with threaded passages to connect the chan
nels with exhaust conduits. The tubular mem
her is further provided with a passage '52 leading
to a channel 53 formed in the spacing member
59 and adapted to receive any seepage which may
take ‘place in the motor casing and between the
are recessed, as shown at 47, to form a circum
'ferential inlet channel and the abutting outer
edges thereof are provided with opposed recesses
motor casing and the supporting structure. This
48 which register one with the other to form an
inlet, to the channel 41. The end members 45 fit 30 passage 52 is connected by a longitudinal pas
about the cylindrical portions of the outlet port
members 35 with a running ?t and are recessed
at 49 to form annular outlet or. exhaust chan
nels‘, and the outer ‘circumferential portion of
each end member abuts against the corresponding intermediate frame member 45 and is pro
vided with an opening 55 which constitutes an
outlet for the exhaust channel 49.
The inner surface of the annular blade car~
rier is spaced from the sleeve 30 and this space,
sage or bore 64 with a chamber 55 in the tubular
structure which communicates, with an annular
channel 65 in the spacing member at that end
of the tubular‘ structure opposite the passage 52
so that seep-age at this end‘ may ?ow freely
,
through the bore to the‘ discharge orf‘drip” pas
sage 62, the outer portion of which is threaded to
receive a wastejpipe. ‘The spacing‘ members 59
have serrated edges 63a to permit the passage of
40 ?uid. The several passages through the tubular
between the two inlet port members, vconstitutes
structure 55 are here shown in a line extending
a passage 5| which is connected with the inlet
channel 41 by a series of radial openings 52
through the blade carrier. Each inlet port mem
ber is provided with a series of ports 53, in the
present instance three, to connect the inlet pas
lengthwise of the structure but they may be, and
usually will be, located at different ‘points about
sage 5| with theiwork chambers 43 formed by
the spaces between the cam surfaces ‘and the
blade carrier. Fluid being delivered under pres
sure to the work chambers acts against the abut
the circumference of the structure.‘
_
' V
In the layout of Fig. 14 the ‘blade carrier is
indicated at 22, the blades at 21, the cam surfaces
at 42%; the work chambers at 43, the inlet ports at
53and the outlet ports at 54, the inlet ports hav
forward portions of the cam surfaces, and the
cam unit is caused to rotate forwardly. The out
let port‘members 35 are each provided with a
ing been lined to‘ distinguish the same from the
unlined outlet ports. The cams move in‘the direc
tion of the arrow and it will be noted that the
inlet ports; which rotate with the cam members,
are always in communication with the forward
portion of the work chambers with which they
are associated‘ andthat the outlet; ports 43 are
plurality of ports 54, in the present instance
' in communication with the rear ends of those
, three, to connect the work chambers with the
work chambers,‘ it being remembered that the
ments formedby the end portions of the blades
in the work chambers and against the inclined
inlet-ports enter the work chambers from below
outlet channels 49. Due ‘to the location of the
andthe ‘outlet ports are arranged above .thepwork
inlet passage 5| at the inner sides of the work
chambers and the outletpassages 49 at the outer 60 ‘chambers. ‘As the-forward end of an inlet port’, ~
sides thereof the'?uid flows outwardly through
moves past one of the blades 27 the ?uid under
the work chambers and the centrifugal force re
pressure-will enter the space between that blade
sulting from the high speed of rotation expedites
“and the forward inclined surface of the cam, and
this ?ow and increases the effective pressure of
the pressure of the ?uid will impart forward
the ?uid. The ?uid is delivered to ‘the inlet
movement to the cam. As the cam, continues to
passage 5| through the circumferentially spaced
move a second blade will enter the ‘same work
chamber before the succeeding outlet port has
openings 52 in the blade carrier and is therefore
moved into line with the ?rst blade, and the ?uid
uniformly distributed and has little tendency to
will continuetoenterthe work chamber between
?ow circumferentially in the inlet passage.
the two blades as well as between-the second
The motor casing 20 may be supported and the
blade and the forward surface of the cam. The
inlet and outlet channels connected respectively
' ?uid continues to act on both blades until the
with a supplyaconduit and an‘ exhaust conduit in
port passes the second blade and at ‘that
‘any suitable manner. In the present instance .inlet
timelor shortly thereafter the forwardedgeof
lthelmotoricasing ‘?ts .snuglylwithin a tubular
structure, or housing, 55 ‘of a length greater than 75 the outlet-port will pass the ?rst mentioned-blade
7
2,411,292‘
8
and permit the fluid between the two blades to
fn'the same manner as the motor above described;
In Figs. 16-22 I have shown another e'mbodir
merit ‘of the ‘invention in which the number of
escape through the ‘outletbhannel.
action
‘takes plate continuously at the six 'inletepo‘rts
and the six outlet ports so that ‘extremely high
speed and. high power may be developed. Due
to the construction and arrangement of, the parts
above described the motor will operate at *exe'
tremely high speeds Without‘ vibration and will
be maintained in proper hydraulic balance at
parts has been substahtially vreduced and the
motor otherwise simpli?ed. As there shown; the‘
blade carrier 65 comprisesan inner or base pot-1
ti'o‘n'é? and an outer portion 61. The ‘outersur;
face of the base portion conforms ‘throughout its
afea ‘to a section o‘f‘e; sphere havi'rig its 'c'e'nte‘rvat
allspeeds. The lapped spherical surfaces inro 10 the axis ‘of the shaft 68 about which the blade
videtig-ht joints between the oohtaeting ‘parts,
carrier ‘is mounted and, in the present-arrange-v
whether ‘fixed 'or relatively movable, and ‘as a
ment, ‘the ‘inner or base .pbrtion’thereof is'sécured
result the joints are substantiaHy'?uid tight and _
to‘ the shaft, as by 1a key 6'9. fThe outer‘porti'on
the operation is smooth and quiet‘
er of the blade carrier is o'f'a width substantially
In Fig. 15 I'have shown 1a modified ‘form of the ‘
less 'th'ah'the width ‘of the base and‘als'o has its
invention in which ‘the blade carrier '2'2'yi's simn
outer surface conforming to a section 'of a‘sphere
lar to the blade ‘carrier above described eitcept
‘described about the aforesaid center. This outer
that the lateral surfaces thereof are ‘in straight
portion of the blade carrier is provided‘with a
lines converging to ‘the ‘center ‘of the sphere
circumferential series of ‘transverse slots 10, the
throughout their area,’ while ‘in the ‘form ‘above
inner walls or which are formed by the spherical
described the'slotte'd porti'" "s only of ‘the lateral
surface of the base 66. There may be any Suit-"
surfaces of the' blade carrier fare in converging
able ‘number "of these ‘slots,’ ‘either odd ‘or 'even',
lines; The intermediate and ‘end trame members
and in the ‘construction here shown there are
of the casing ‘are similar ‘to those above described
ten slots ‘to receive a corresponding "number {of
and the lateral surfaces of the inwardly extend; 25 blades. ‘These parts of the lateral ‘surfaces iof'the
ing' portions of‘ the intermediate frame mem
‘outer or slotted portion of "the ‘blade Carrier,
bers 44’ converse toward ‘the center of the ‘sphere
which are adjacent the base converge toward
‘in line with the ‘respective lateral 'surifaee‘s of the
the center of said sphere and ‘the outer ‘lateral
blade carrier, ‘as shown at Ma. The inner sur
‘parts or corners 'of the’ blade barrier are cut ‘away
faces ‘10f the end frame members 45' conform to
sections of ‘spheres de" "ribe’d about the eériter
or beveled as shown at ‘H for -''a purpose ‘which
will hereinafter appear-t
‘
‘of the aforesaid sphere so as ‘to have a running
The cam units are supported at the respective
?t on the spherical surfaces of the outer ~port
rings.
each cam unit ‘the several members
prises
sides ofa the
‘single
blade'ca'rri-er
member 12and
'whiéhlooristitu'te‘s
each
unit :c‘o
‘both
"
‘thereof, that is ‘the inner port member ‘31'', the
35 a barn member and a "port member, ‘and the end
cam member 33’ and ‘the outer ip'o‘rt member 35"
s which conform
are provided ‘with outer
to sections or spheres Tthroug- 'utit‘hei-r areas and
the .innersurraees of ‘the am
inbelr and of the
portions 'of'the earn members adjai'oéht ‘the blade
carrier are provided with_ li-nhe'r surfaces ' ch:
forming substantially to sedtl‘oh‘s Fol? the ?rst‘iriene
tiohe‘d sphere 'so that they iillha've lriuiiininig‘v'?t
outer port member like-w e eon rim to sections 40 about the spherical surf
of
portspheres
member
throughout
3|" has an their
axial bore
areas.tore'cei'v'e
~ ‘The
the
sleeve 30" and "the ‘darn member and ‘the outer
port member have ‘circular openings te "?t about
' the sleeve.
Those edges of the inner and outer
“port 'rnemhers which ‘are adjacent the blade car
T'iei‘ aji‘e arranged in a, lihé WhiCh extends ‘through
portions of ‘the cam members also conform to
sectiorisof a sphere described about the aforesaid
‘center on the same radius as the ‘outer surface
'> of the blade ‘carrier. The other end portions iof
these lea-m members are eyhhd?ea-i and extend
about the shaft T68 and in ‘the present instaniic'e
the Clerk-111751‘ Of the Sp‘h'er'e and the
'pOihtS ‘0f
‘the 'o'aiih lobes ‘arejalso ‘in a ‘line which extends
are held against rotation therewith. V
through the center ‘of the sphere and 51S Tlush_
‘which ahut'en" aga'nsjt "the-other oh the miter
'With the adjacent edges of the inner and outer
15' tli-h'é'l'fnb'ei‘s. Thus eaeh'eaim Unit has ‘its edge
surface “ariaue1 'With and in contact with the ‘ad
'ji'a'c‘en‘ Side of the blade carrier and the adjacent
~suirfaee' or the inner frame member. The sleeve
‘3?’ is-ffirovid'ed at one ehd with an enlargement
141'!" ("against which ‘the edge or ‘the outer part
‘35" ‘of "the ‘adjacent cam unit abuts and a‘
flnut’d'lo'threade'd onto the other end of ‘the-sleeve
eohtaetsthe adjacent ‘edge 50f the other Cam unit
isle-‘that all the-‘member's are firmly secured to the
sleeve‘.
‘cohstructioh enables the eamh'nits
to be assehimeo T?r'i'o'l‘ t0’ the assembi'y of the lino"
tor
la Whble and the edges 0f th'e'pdi‘t rings
:?rii’sh‘ed ‘simultaneously and with ‘complete-ac
enemy, and likewise the lateral surfaces of T'the
blade carrier and bf the inner iframe lrlel'l‘i'bér Cali]
be ?nished ‘to exact alinen'ient prior to assembly.
‘Further, in this construction, centrifugal force
o'p'b'os'es and largely prevents theflea'kage of fluid
‘between the contacting ‘surfaces of Tthe outer p'or't
‘Tfing' 3'5’: and ‘the érld frame member 455, While
fpermii-ttih’g the l‘ubrio'ati'on ‘of those‘ isorfaee's.
'This‘modi?ed form "of ft'h‘esmotor would 'be mount
'
e of the hase ‘66 36f
the I-b'lade oarrieh'a-nd the outer surfae'es of these
"e‘d film the same ‘manner “and ‘would be operated ‘' -
casing 1376f the motor ‘is "for-medin ‘itw
é 'Olitél‘
it
sideof the "blade (‘carrier and have their ‘i Ire-if
surfaces Conforming to a :seetieajera sphere
described about the yaffor'e'saidfce'nter ‘s'o;as1to‘hail'e
a i'u'I'm'l-ng’?t about the sbherio'al siil‘fao’eéiofthe
blade "carrier and a 'shu-g ?t about the ‘cam imam;
ber. T'I‘he "ca-1h members are provided with deposed
cam surfaces “each Fhatinéltwoliehes, {the high 7
‘points of‘whi’ch are adjacent to th
v'espdndih‘e
lateral su-r-fa‘oes of the blade can 1 aha may
'coht'a‘ct‘with those "su-rface'slbfut this 7is' not esseh~
tial as the arrangement of the1iiorts','fte:';be here
inafter describeajissuch
at sealing ‘contact
between'th'e’cam ‘and-thebla I oarrieriis~unrieces¥
sary. Blades 1'5 ‘arelmoun'tejdtin the respective
‘slots of ‘the blade carrier for ‘longitudinal ‘move
nie'nt about a‘ transverse axis coincident with ‘the
‘center of ‘the ‘sphere and the ‘eh'ds re these ‘blades
have sealed running contact ‘wi ' the ‘respective
cam surraees and are in hnes‘i rivers-mete ‘the
ioe'nte'i' I of ‘the ‘sphere. “ The "end surfaces of these
blades are
flih'es ‘oonvergm'g to’the aforesaid
center ‘so thateach rbla'd'e ‘ineffect'comprise‘s' a
'seotlon'ofa'corre. ‘The cam’surfa'ces‘e'of the‘ca‘m :
vrherrirbers at all opposed circumferential apoints
also ooh-verge toward the ‘center :of ~~theq=~sphere
2,411,282
‘10
substantially identical operating characteristics‘
so as to have sealing contact with the ends of
the blades at all times for the full width of the
when the rotor is operating in either direction of
blades.
rotation, and high overall efficiency.
.
The frame members ‘M of the casing are pro
The blade carrier 85, blades 86, cam members
87 and casing members 88 are substantially the
vided in the outer surfaces of the abutting por
same as shown in Figs. 17 to 22 with the exception
tions thereof with recesses which form an inlet
of the channels and ports. An outer supporting
channel 75 and the recessed portions of these
structure or. housing 89 is mounted about the
frame members are provided with a circumferen
casing 88 and is provided at one end with a radial
tial series of inlet ports 11 leading to the spaces
between the blade carrier and the cams. Prefer 10. ?ange 9!! having a running ?t about the shaft ‘
9| and at the other end with an internal screw
ably these inlet ports are in the nature of two
elongate slots arranged on diametricaily opposite
thread to receive a threaded collar ‘or nut 92
which also has a running ?t about the shaft.
sides of the shaft and due to the cutting away or
The ?ange and nut engage the respective casing
beveling of the corners of the blade carrier, as
members so that the tightening of the nut draws
shown at ‘I I, these inlet ports may be of relatively.
the several parts of the motor into proper en
large capacity. The outer spherical surface of
gagement one with the other. The housing 89
each cam member ~is provided with a circumfer
is provided with internal circumferential chan
ential series of outlet ports 18 which are stag
nels 93 and 94. Normally the channel 93 con
gered with relation to the inlet ports, each cam
member preferably having two elongate‘outlet 20 stitutes the inlet channel and the channels 94
constitute the outlet channels, but the flow of
ports arranged on opposite sides of the shaft in
?uid throught the channels may be reversed to re
the spaces between the corresponding inlet ports.
verse the direction of operation of the motor.
These outlet ports lead to outlet passages 19
The outer corners of the blade carrier are not
which are connected with outlet channels 80 in
beveled as in the former construction but the
the outer surface of the motor casing and which
lateral surfaces of the slotted portion ‘thereof
become closed channels when the motor is
mounted in a supporting structure in the manner
are in straight converging lines throughout their
width. Each part of the casing has formed there-i
shown in Fig. 3.
in a series of inlet ports 95, there being in the
The operation is shown in the lay-out of Fig. 22.
The rotatable blade ‘carrier is shown at 15 and 30 present instance two ports in each series, which
connect the inlet channel 93 with ‘the work
rotates in the direction of the arrow. The cam
chambers 96 on the respective sides of the blade
surfaces are shown at ‘E2 and are in constant
carrier. Each inlet port is arranged to discharge
sealed engagement with the ends of the blades‘
the ?uid into the work chamber substantially tan
15. The inlet ports 1‘! and the outlet ports T8 are
gentially to the circumference of the work cham
arranged alternately along the respective sides of
ber and is taper or otherwise shaped to increase
the blade carrier with an inlet port on each side
the velocity of the ?uid passing through thesame.
of the blade carrier opposite an outlet port on the
In the present construction each inlet port con
other side of the blade carrier, As a blade passes
sists of a circumferential slot in the casing, the
the forward edge of an inlet port ?uid enters the
space or work chamber in the rear of the blade 40 front and rear walls 91 and 9B of which are
substantially tangential to the inner wall of the '
and exerts forward pressure thereon. The size
of the ports and the spacing of the blades is such
that a second blade may move past the rear edge
of the inlet before the ?rst mentioned blade has
moved beyond the inlet so that the oil or other
?uid entering through each inlet acts constantly
on two blades. Likewise the spacing between the
casing and the side walls of which converge in
wardly. As more clearly shown in Fig. 25, the
inlet channel 93 is slightly tapered, or otherwise
formed, from its point of connection with the
source of ?uid supply to the point at which it
merges into the last inlet port, to gradually in
crease the velocity of the fluid ?owing through
inlet and outlet ports is such that there will at
the same and maintain a substantial uniform
all times be at least one blade and, in the present
instance two blades, in the work chamber between 50 velocity of the ?uid as its enters the work chamber,
from each inlet port. Due to the shapes and ar
each inlet port and the adjacent outlet ports,
rangements of the inlet channel and the inlet
these blades serving to seal the chamber so as to
ports the ?uid enters the work chambers tangen
prevent the direct ?ow of ?uid from the inlet to
tially and at substantially uniform velocities, the
the outlet. The ?uid which is con?ned between
two blades when the second of those blades moves 55 velocity at each port approximating, but not ex
ceeding, the velocity of the rotor blades, and losses
beyond the inlet is carried forwardly until the
due to turbulence and to changes in the direction
foremost of the blades passes the rear edge of the
of flow of the ?uid are reduced to a minimum‘. As
outlet, at which time the ?uid is discharged.
a result the increased kinetic energy of the fluid
Thus it will be apparent that ?uid is constantly
causes rapid acceleration at starting, the motor
entering both work chambers on both sides of the
operates at a very high speed and the shock at
blade carrier and is being constantly discharged
the point of ?uid entrance into the work chamber
from both work chambers on both sides of the
is materially reduced and the motor operates
blade carrier.
very quietly.
The arrangement and shapes of the inlet and
The work chambers are connected with the
outlet channels and ports shown in Figs. 17 to 22, 65
outlet channels 94 by corresponding series of
are particularly well adapted for use with a pro
pellant of high viscosity where high speed is not
ports 99, formed in the casing members,iwhich
required, and in Figs. 23 and 24 there is shown a
are preferably of» the same effective shape, size
modification which is better adapted for ‘high
and arrangement as the inlet ports but are re
speed operation with a propellant of low viscosity; 70 versed with relation thereto. (Fig. 26). Each
In this modi?cation the shapes and arrangement
outlet channel gradually increases in cross sec
of the channels and ports are such as to provide
not only higher speeds ‘with a low viscosity pro
pellant but also to provide a quieter and smoother
tional area from the ?rst outlet port to its point
of discharge. ‘ Due to the outwardly flared shape
of the outlet ports and the increasing ?ow capac-_
operation, a more rapid acceleration of the rotor, 75 ity of the outlet channel the flow of the ex~
2,411,282
11
12 '
haust ?uid is ole-accelerated and its velocity is
decreased as it approaches the point of discharge.
annularv surfaces" forming, between them a work
Thus the ?uid enters the work chambers at a ve
verse portions of said opposed surfaces being in
lines intersecting the axis of said shaft at. a
chamber of progressively varying width, all trans
locity which is substantially uniform at all inlet
ports‘ and approximates rotor‘ velocity, and quick
ly loses its velocity as it passes from the work
chambers through the exhaust passages. In. ad
dition to providing high uniform velocity the
common point, and a blade supported on one of
said elements for movement about an axis trans
verse to the axis of said shaft and having‘ an
end surface in contact with the annular surface
arrangement set forth greatly reduces turbulence,
of the other of said elements, said end surface
eddy losses and ?uid Viscous losses, and the mate- 10 of said blade being in a line intersecting the
rial reduction of such turbulence and losses
axis. of said’ shaft at said common-center.
tends to produce a quiet, smooth. running motor
5. A ?uid displacement device comprising a:
casing having an inner circumferential surface‘
and to increase ef?ciency. Further, the outlet
channels and ports being substantially identical
conforming to a section of a sphere, two elements
with the inlet channel and’ports the direction of
mounted in said casing and each having a cir-_
the rotor may be reversed by introducing the ?uid
cumferential surface conforming to and in sealing; '
through the passages herein. characterized as the
contact with the inner spherical surface of said
outlet channels and ports and exhausting the
casing, said elements having opposed surfaces
same through the inlet ports and channel, and
forming between them an annular work chamber‘
when so reversed the motor will have the same
of progressively varying width, one of said ele
operating characteristics and will operate with
ments having ?uidv displacing. movement with
the same e'f?ciency as when the ?uid is introduced
relation to the other element and to the spherical
through the inlet channel and ports.
surface with which it contacts, and. blades car
While I have shown and described certain em
ried by one of said elements, engaging the op
bodiments of my invention I wish it to be under 25 posed surface of the other element and movable
stood that I do not desire to be limited to the
by the relative movement of said elements.
details there shown as various further modi?ca
6. In a ?uid displacement device, two struc
tions may appear to a person skilled in: the
tures one of which is movable with relation to the
art.
other, said structures having oppositely facing
Having’ now fully described my invention, what 30 surfaces conforming to sections-of spheres hav
I claim as new‘and desire to secure by Letters
ing a common center, said structures also
Patent, is:
having parts provided with opposed annular
1. In a ?uid displacement device, cooperating
surfaces forming between them a work cham
elements at least one of which is movable, said
ber of progressively varying Width, all por
elements having surfaces conforming to sections 35 tions of said annular surfaces‘ being in lines ex
of spheres having a common center and also
tending through the center of said spheres, and.
having‘ opposed surfaces in lines extending
a blade supported by one of said parts and having
through the common center of said spheres and
one end in constant engagement with the annular
forming between them a work chamber of progres
surface of the other of said parts, said blade and
sively varying width, and blades carried by one 40 the part supporting the same being. relatively
of said elements and extending into said work
movable in the direction of the length of said
chamber.
blade about an axis extending through said com
2. In a ?uid displacement device, two elements
mon center of said spheres, whereby all movable
one of which is movable with relation to the other,
a shaft operatively connected with said movable
element, said elements having opposed annular
parts of said device move about said common
'.
center.
'
surfaces forming between them a work chamber
'7. In a ?uid displacement device, two structures
one of which is movable with relation to the
of progressively varying Width, all transverse por
tions of said opposed surfaces ‘being in lines
other, said structures having oppositely facing
surfaces conforming to sections of spheres having
intersecting the axis of said shaft at a common 50 a common center, said structures also having
point, and a blade supported by one of‘ said
parts provided with opposed annular surfaces
elements and engaging the other of said elements,
forming between them a work chamber of progres
said bladeand the element by which it is sup
sively varying width, all portions of said annular
ported being relatively movable in the direction
of the length of said blades.
3. In a fluid displacement device, two elements
one of which is movable with relation to the
other, a shaft operatively connected'with said
movable element, said elements having opposed
surfaces being in lines extending through the
center of said spheres, and blades supported by
one of said parts for movement about a com
mon transverse axis extending through the center
of said spheres, each blade being curved about
said transverse axis and having one end thereof
annular surfaces forming between them a work 60 in constant movable contact with the annual sur
chamber of progressively varying width, all trans
faces of the other of said parts, said ends of
verse portions of said opposed surfaces being in
said blades and all portions of that annular sur
lines intersecting the axis of said shaft at a
face with which said ends contact being in lines
common point, and a blade supported by one of
extending through the common center of said
>
~
said elements and engaging the other of said 65 spheres.
elements, said blade and the element by which it
8. In a ?uid displacement device, a hollow struc
is supported ‘being relatively movable in the
direction of the length of said blades, the end
ture, a shaft rotatable in saidstructure, said ‘
other, a shaft operatively connected with said
structure, a blade actuating element supported in
said structure, said elements having opposed an
structure having at least a portion of its inner
surface of said blade which engages said other
surface conforming to a section of a sphere having
element being in a line intersecting the axis of 70 its center at the axis of rotation of said shaft, a
said shaft at said common point.
blade carrying element supported in said struc
4. In a ?uid displacement device, two elements
ture and having a surface conforming to and in
one of which is movable with relation to the
engagement with the spherical surface of said
movable element, said elements having OPQOSBd
2,411,282
’
13
nular surfaces forming between them a work
chamber of progressively varying width, each
transverse portion of each of said opposed sur
faces being in a line extending through the center
of said sphere, and blades supported by said
blade carrying element and each having a sur
face conforming to and in movable contact with
the spherical surface of said structure, each blade
14
cam surface arranged to form a work. chamber
between the same and said blade carrier, said
blade carrier having a circumferential. series of
transverse slots, blades slidably mounted in said
slots with their ends in running contact with
said cam‘ surface, an inlet ‘passage communi
cating with said work chamber at the inner sides
of said blades, means for connecting said passage
being movable into and out of said work chamber
about a transverse axis intersecting the center of
said sphere and having constant contact with
said surface of said blade actuating element, one
with a source of ?uid, and an outlet port com
of said elements being movable to cause said
blades to be actuated by said blade actuating
to be mounted about a shaft, an annular blade
element,
municating with said work chamber at the outer
sides of said blades.
13. In a ?uid operated motor, a casing adapted
carrier supported within said casing, held against
15 rotation and having a circumferential series of
transverse slots, a rotor within said casing adapted
to be secured to said shaft and including opposed
annular cam surfaces having parts in running
atively connected with one of said structures,
contact with the respective lateral surfaces‘ of
said structures having oppositely facing surfaces
conforming to sections of spheres having a com 20 said blade'carrier, and other parts spaced from
said lateral surfaces to form work chambers,
mon center at the axis of said shaft, one of
blades slidably mounted in the slots in said
said structures including a blade carrying element
blade carrier, the ends of each blade having sealed
and the other of said structures including a
running contact with the respective cam surfaces,
blade actuating element, said elements having
an annular inlet passage between said blade car
opposed annular surfaces forming between them
rier and said shaft, ports in said rotor connecting
a work chamber of progressively varying width,
said inlet passage with said work chambers, said
each transverse portion of each of said annular
casing having inlet and outlet channels, openings
surfaces being in a line extending through the
in said blade carrier connecting said inlet channel
center of said spheres,.and blades supported by
said blade carrying element in movable contact 30 with said inlet passage, and ports in said rotor
connecting said work chambers with said outlet
with both of said spherical surfaces, said blades
channels.
7
being movable into and out‘of said work chamber
14. In a ?uid operated motor, a casing having
about a common axis intersecting the axis of
an inlet channel and an outlet channel, a tubular
said shaft at the center of said spheres and having
constant contact with the surface of said blade 35 member adapted to be mounted on a shaft for
rotation in said casing, a blade carrying element
actuating element, one of said elements being
and a blade actuating element arranged within
movable with relation to the other element to
said casing to form between them a work cham
cause movement to be imparted to said blades by
ber, one of said elements being secured to said
said blade actuating element.
10. In a ?uid displacement device comprising 40 tubular member and the other of said elements
being secured to said casing, said blade carrying
a blade carrying element and a blade actuating
element having a circumferential series of trans
element, said elements having opposed annular
9. In a ?uid displacement device, an outer
structure and an inner structure, a shaft oper
verse slots curved about an axis intersecting the
surfaces forming between them a work chamber
axis of said tubular member, curved blades slid
of progressively varying width, one of said ele
ments being rotatable with relation to the other 45 able in said slots, the opposed surfaces of said
elements and the ends of said'blades being in
element, each portion of said surface of said
lines extending through the point of intersection
blade actuating element being in a line ex
tending through and inclined with relation to ' of said axes, an inlet passage between said tubular
member and one of said elements communicating
the axis of rotation of said rotatable ele
with the inner part of said work chamber, and
ment, and a blade slidably mounted in said blade
means for connecting said passage with said inlet
carrying element for longitudinal movement
channel and for connecting the outer side of said
into and out of said work chamber about
work chamber with said outlet channel.
an axis transverse to the axis of rotation of said
15. In a ?uid operated motor, an outer casing
rotatable element and having constant engage
adapted to be mounted about a shaft,‘a stationary
ment with said inclined surface of said blade '
blade carrier supported within said casing and
actuating element for movement thereby.
having a portion conforming substantially to a
11. In a ?uid operated motor, a stationary
section of a sphere the center of which is at the
structure and a rotatable structure, one of said
axis of said shaft, said ,blade carrier having a
structures including an annular blade carrier
circumferential series of transverse slots curved
having a circumferential series of transverse slots
about the center of said sphere and having its
each curved about an axis transverse to the axis
lateral surfaces respectively in lines converging
of said rotatable structure, the slotted portions of
to the center of said sphere, a rotor adapted to be
the lateral surfaces of said blade carrier converg
connected with said shaft for rotation therewith
ing inwardly, curved blades mounted in the re
and comprising two annular cam units arranged
spective slots for longitudinal movement about
at the respective sides of said blade carrier, each
said transverse axis, the other of said structures
cam unit including an inner port member, a'cam
including opposed cam surfaces on the respective
member mounted on said port member, and an
sides of said blade carrier having all opposed cir
outer port member mounted on said cam member,
cumferential parts thereof converging inwardly
said members having contacting surfaces each
and having running contact with the ends of;
comprising a section of a sphere described about
said blades.
the center of the first mentioned sphere, said cam
12. In a ?uid displacement device, a stationary
member having a cam surface provided with
structure and a rotatable structure, one of said
lobes to form work chambers between the same
structures including an annular blade carrier and
and the adjacent lateral surface of said blade
the other of said structures including an annular
2,411,282
15
v16
carrier, all opposed circumferential portions of
cam surface being in, linesextending through: the
said cam surfaces being spaced the same distance
common center of said spheres, and means, co
one from the other and being in lines converging
operating with said cam surface to move the end
to the center of said sphere, blades slidably
portions of said blades into and out of the space
mounted in the slots of said blade carrier and C1 between said cam surfaces and said blade car
curved about the center of said sphere, each blade
rier.
having its ends in lines converging to the center
, 18. In a ?uid operated motor, a stationary
of said sphere and in sealed running contact with
structure and a rotatable structure, one of said
the respective cam surfaces, said inner and outer
structures including two annular. cam members
port members having respectively inlet and outlet 10 having opposed axially spaced cam surfaces. all
ports communicating with said work chambers,
opposed parts of which converge inwardly, the 7
and means for connecting said inlet and outlet
ports respectively with a ?uid supply conduit and
other, of said structures including an annular
blade carrier arranged between said cam surfaces, '
an exhaust conduit.
having a circumferential series of transverse slots
'
16, In a ?uid operated motor, an outer casing
adapted to be mounted about a shaft, a stationary
blade carrier supported within said casing and
having a portion conforming substantially to a
section of a sphere, the center of which is at the
axis of said shaft, said blade carrier having a 20
circumferential series of transverse slots curved
about the center of said sphere and having its
lateral surfaces respectively in lines converging
in the outer portion thereof and having inwardly
converging lateral surfaces, and also having‘its
outer corners cut away to form circumferential
recessesblades mounted in said slots for longi
tudinal movement therein and having, inwardly
converging end surfaces contacting the respective
cam surfaces, and a casing extending about said
' structures and having inlet ports communicating
with the spaces between the lateral surfaces of
said blade carrier and the respective cam surfaces
25 and also having outlet channels, said cam mem
to the center of said sphere, a rotor adapted to
be connected with said shaft for rotation there
with and comprising two annular cam units ar
bers having therein outlet ports connecting ‘said
ranged at the respective sides of said blade carrier,
each cam unit including an inner port member, a
spaces with the respective outlet channels.
19. In a ?uid operated motor, a stationary
cam member mounted on said port member, and
structure and a rotatable structure, one of said
an outer port member mounted on said cam mem 30 structures including two annular cam members
ber, said members having contacting surfaces
having opposed axially spaced cam surfaces all
opposed parts of which converge inwardly, the
each comprising a section of a sphere described
about the center of the ?rst mentioned sphere,
other of said structures including an annular
blade carrier arranged between said cam surfaces,
having ‘a circumferential series of transverse
said cam member having a cam surface provided
with lobes in running contact with the adjacent
lateral surface of said blade carrier, all opposed
circumferential portions of said cam surfaces
slots in the outer portion thereof and having in
wardly converging lateral surfaces, and also hav
of the two cam members being spaced the same
ing its outer corners cut away to form circum
ferential recesses, blades mounted in said slots for
distance one from the other and being in lines
converging to the center of said sphere, blades
slidably mounted in the slots of said blade car
rier and curved about the axis of said sphere,
each blade having its ends in lines converging
to the center of said sphere and in sealed running
contact with the respective cam surfaces, said
longitudinal movement; therein and having in
wardly converging end surfaces contacting the
respective cam surfaces, and a casing extend
ing about said structures and having on opposite
sides of the motor axis circumferential elongate
inlet ports communicating with the spaces be
inner port members having inlet ports connecting
tween said blade carrier and the respective cam
the space between said inner port members with
the spaces between the lobes of said cam surfaces,
said outer casing having an inlet channel extend
surfaces, said casing also having outlet channels
ing about said blade carrier and outlet channels ,
extending about the respective outer port mem
bers, said blade carrier having a circumferential
series of openings connecting said inlet channel
with the space between said inner port members,
and said outlet port members having outlet ports
connecting the spaces between the lobes of said
cam surfaces With said outlet channels.
17. In a ?uid operated motor, a stationary
structure and a rotatable structure, one of said
structures including an annular blade carrier
having a circumferential series of transverse
slots each curved about an axis transverse to
the axis of rotation of said rotatable structure, the
other of said structures including inner and outer
port members and an annular cam member be
tween said port members, said members having
contacting surfaces conforming to sections of
spheres having a common center at the axis of
said rotatable member, said cam member also
having a cam surface opposed to the slotted por
tion of the adjacent lateral surface of said blade
carrier, curved blades mounted in the slots in
said blade carrier and having their ends in run~
ning contact with said cam surface, said ends of
said blades and all circumferential parts of said
and each cam member having on opposite sides
of said axis circumferential outlet ports con
necting said spaces with the respective outlet
channels, said outlet ports being circumferentially
spaced with relation to said inlet ports.
20. In a ?uid operated motor, an annular blade
carrying element, ‘an annular cam element, one
of said elements being rotatable, said blade carry
ing element having an inner portion and a rela
tively narrow outer portion, both portions having -
outer surfaces conforming to sections of spheres
having a common center and said outer portion
having a circumferential series of transverse slots
curved about said center, said cam element having
inner and outer surfaces conforming to sections
of spheres describedabout said center, said inner
surface being in running contact with a spherical
surface of the inner portion of said blade carry:
ing element, said cam element also having a
cam. surface opposed to the adjacent lateral sur
face of the outer portion of said blade carrying
element to form a work chamber between said
elements, all parts of said opposed surfaces being
in lines extending through the center of said
spheres, a casing mounted about said elements and
having an inner surface conforming to a section
of a sphere described about said center and
75 engaging the outer spherical surface of said. cam
' 2,41 1,282
17
1d
-
element and of the outer portion of said blade
carrying element and also having circumferen
‘tially spaced inlet and outlet ports communi
surfaces, and each cam member having a series
of outlet ports communicating with said spaces
and staggered with relation to the corresponding
eating with said work chamber, and an outer
structure extending about said casing and form
ing between the same and the casing circumfer
ential inlet and outlet chambers each communi
cating respectively with said inlet and outlet
series of inlet ports.
23. In a fluid operated motor, an annular blade
carrier comprising an inner portion adapted to
be secured to a shaft, and a relatively narrow
outer ‘portion, the outer surfaces of both portions
mounted about a shaft, and a relatively narrow
said spheres, annular stationary cam members
of the latter, each cam member having an inner
surface conforming to ‘a ‘section of a sphere
described about said center and in running con
tact with the spherical surface of the inner
members having opposed cam surfaces in lines
converging to the center of said spheres, curved
conforming to sections of spheres having a com
ports.
mon center at the axis of said shaft, said outer
10
21. In .a fluid operated motor, a stationary
portion having a circumferential series of trans
structure and a rotatable structure, one of said
verse slots curved about an axis transverse to
structures including an annular blade carrier
said shaft and coincident with the center of
comprising an inner portion adapted to be
outer ‘portion, the outer surfaces of both portions 15 supported at opposite sides of said blade carrier
and each having an inner surface conforming to
conforming to sections of spheres having a com
a section of a sphere described about said center
mon center at the axis of said blade carrier, said
and in running contact with the spherical sur
outer portion having a circumferential series of
face of the inner portion of said blade carrier
slots curved about ‘an axis extending through the
and also having an outer surface conforming
center of said spheres, the other of said struc
to a section of a sphere described about said center
tures including annular cam members supported
on the same radius as the spherical surface of
at the respective sides of said blade carrier and
the outer portion of said blade carrier, said‘cam
forming work chambers on the respective sides
portion of said blade carrier and also having an
outer surface conforming to a section of a sphere
described about said center, said cam members
having opposed cam surfaces in lines converging
to the center of said spheres, curved blades
mounted in the slots of said blade carrier and
each having its end surfaces in lines converging
to the center of saidspheres and in running con
tact with the respective cam surfaces, said station
ary structure also including a casing having an
inner surface conforming to a section of a sphere
blades mounted in the slots of said blade carrier
and each having its end surfaces in lines con
verging to said center and in running contact with
the respective cam surfaces, and a casing having
an inner surface conforming to a section of a
sphere described about said center and ‘in en
gagement with the outer surfaces of said blade
carrier and said cam member, said blade carrier
having its outer corners beveled to provide the
spaces between the same and said cam with en
larged outer portions, and said casing having ‘a
circumferential series of elongate inlet ports‘
each communicating with the space ‘between said
blade carrier and one of said cam surfaces and
described about said center and engaging the
spherical outer surfaces of said blade carrier and 40 also having outlet channels, and said cam mem
bers each having in the spherical outer surface
said cam members, inlet and outlet channels ex
thereof a circumferential series of elongate outlet
tending circumferentially of said work chambers
ports connecting the space between its cam sur
and ports connecting said channels with said
face and said blade carrier with an outlet channel,
work chamber.
22. In a ?uid operated motor, an annular blade
carrier comprising an inner portion adapted to be
said outlet ports being spaced circumferentially
from the corresponding inlet ports.
24. In a fluid operated motor, ‘a casing, an
annular blade carrying member, an annular cam
portion, the outer surfaces of both portions con
member having a cam surface arranged at one
forming to sections of spheres having‘a common
center at the axis of said shaft, said outer por 50 side of said blade carrying member to form a work
chamber between said members, one of said mem
tion having a circumferential series of transverse
bers
being rotatable, blades carried by said-blade
slots curved about an axis transverse to said shaft
carrier and having running contact with said cam
and coincident with the center of said spheres,
surface, means cooperating with said cam surface
annular stationary cam members supported at
opposite sides .of said blade carrier and‘each hav 55 to move said blades into and out of said work,
secured to a shaft, and a relatively narrow outer
ing an inner surface conforming to a section of
a sphere described about said center and in run
ning contact with the spherical surface of the
innerportion of said blade carrier and also having
an outer surface conforming to a section of a 60
sphere described about said center on the same
radius as the spherical surface of the outer por
tion of said blade carrier, said cam members
having opposed cam surfaces in lines converging
chamber, said casing having a series‘ of circum
ferentiallyspaced inwardly tapered'inlet and out
let ‘ports substantially tangential to said work
chamber and also having a series of circumferen
tially spaced outlet ports, and inlet and outlet
channels communicating respectively with said
inlet and outlet ports and each extending about
the major portion of said casing.
25. In afluid operated motor, a casing, an an!
to the center of said spheres, curved blades 65 nular blade carrying member, ‘an annular cam
member having a camsurface arranged at one
mounted in the slots of said blade carrier and
side of said blade carrying member to form a Work
each having its end surfaces ‘in lines converging
chamber between said members, one of said meme
to. said center and in running contact with the
bers being rotatable, blades carried by said blade‘
respective camvsurfaces, and a casinghaving an
inner surface conforming to a section of a sphere 70 carrier and having running contact with said
cam surface, means cooperating with said cam
described about said center and in engagement
with the outer surfaces of said blade carrier and
' said cam members, said casing having two series
surface, to move said blades into and outof' said
work chamber, said casing having a. series of
circumferentially spaced inwardly tapered inlet
of inlet ports communicating with the spaces
between said blade carrier and the respective cam 75 and outlet ports substantially tangential to said
52,41 1,282
y
.
19
20
work chamber and also having a series of- circum—
ports of both series and decreasing in cross sec‘
ferentially spaced outlet ports, an inlet channel
tion to cause fluid to be delivered to said work
extending about said series of inlet ports com
chambers from all inlet ports at substantially the
municating with each port of said series and de
creasing in cross sectional area in the direction Cl same velocity, and outlet channels extending
about said casing and communicating with the
of flow, and an outlet channel extending about
outlet ports of the respective series, and outlet
said series of outlet ports and communicating
channels extending about said casing and com
‘with each of said outlet ports.
municating with the outlet ports of the respective
'26. In a ?uid operated motor, a stationary
structure, a rotatable structure, one of said struc 10
29. In a ?uid operated motor, a stationary
tures including an annular blade carrier having
structure and a rotatable structure, one of said
a circumferential series of transverse slots and the
structures including an annular blade carrier
other of said structures having annular cam sur
having a circumferential series of slots and the
faces arranged on the respective sides of said
other of said structures including cam members
blade carrier to form annular work chambers
arranged on opposite sides of said blade carrier to
between said cam surfaces and said blade carrier,
form work chambers between the lattercand the
blades mounted in said slots in running contact
respective cam members, blades mounted in said
with said cam surfaces, a casing extending about
slots for longitudinal movement and having run
said structures and having circumferentially
ning contact with the respective cam members, a
spaced inlet ports arranged to direct ?uid against
casing arranged about said structures and having
the blades in said work chambers and circum
two series of inlet ports leading to work chambers
ferentially spaced outlet ports to receive ?uid
on the respective sides of said blade carrier, each
from said work chambers, inlet and outlet chan
inlet port being substantially tangential to the
nels extending about the major portion of said
work chamber with which it communicates, said
casing and communicating respectively with said
casing also having two series of outlet ports lead
inlet ports and said outlet ports, said inlet channel
ing from the work chambers on the respective
decreasing in cross sectional area in the direction
sides of said blade carrier, and an inlet channel
of ?ow.
series.
27. In a ?uid operated motor, a stationary
structure and a rotatable structure, one of said
structures including an annular blade carrier
having a circumferential series of slots and the
other of said structures including cam members
arranged on opposite sides of said blade carrier
to form work chambers between the latter and
the respective cam members, blades mounted in
said slots for longitudinal movement about an
, axis transverse to the axis of said rotatable
structure and'having running contact with the
respective cam members, a casing arranged about
said structures and having two series of inlet ports
leading‘ to work chambers on the respective sides
of said blade carrier, each inlet port being sub
stantially tangential to the work chamber .with
which it communicates, said casing also having
two series of outlet ports leading from the work
chambers on the respective sides of said blade car
rier,'and an inlet channel extending about said
casing and connected with the inlet ports of both
series, and outlet channels extending about the
casing and communicating with the outlet ports
of the respective series.
-
‘
'28. In a ?uid operated motor, a stationary
structure and-a rotatable structure, one of said
structures including an annular blade carrier _
having a circumferential series of slots and the
other, of said structures including cam members
arranged on opposite sides of said blade carrier to
formfwork chambers between the latter and the
respective ‘cam members, blades mounted in said
slots for longitudinal movement and having run
ning contact with the respective cam members, a
casing arranged about said structures and having
two series of inlet ports leading to work chambers
on the respective sides of said blade carrier, each
inlet port being substantially tangential to the
work chamber with which it communicates, said
casing also having two series of outlet ports
leading from the work chambers on the respective
sides of, ‘said’ blade carrier and substantially
‘ '
extending about said casing, communicating with
both series of inlet ports and gradually decreas
30 ing in cross sectional area from its point of con
nection with the ?uid source to its point of con
nection with the last inlet port of said series, and
outlet channels extending about said casing, com
municating with the respective series of outlet
ports and gradually increasing in cross sectional
area toward their points of discharge.
30. In a ?uid operated motor, a stationary
structure and a rotatable structure, one of said
structures including an annular blade. carrier
having a circumferential series of transverse
slots and the other of said structures including
cam members arranged on opposite sides of said
blade carrier to form work chambers between the
latter and the respective cam members, blades.
mounted in said slots for longitudinal movement,
and having running contact with the respective.
cam members, a casing arranged about said'
structure and having two series of circumferen
tially spaced inlet ports leading to the work cham
berseon the respective sides of said blade carrier,
each inlet port being substantially tangential to
the work chamber with which it communicates
and having inwardly converging walls, said cas
ing also having two series of circumferentially
spaced outlet ports leading from the work cham
bers on the respective sides of said blade carrier,
said outlet ports being substantially tangential
to the work chambers with which they communi
cate, having outwardly diverging walls and being.
of substantially the same size and shape as said
inlet ports, and a housing extending about said
casing and having a circumferential channel com-'
municating with both series of inlet ports and
decreasing graduallyin cross sectional area from
the ?rst inlet port to the last inlet port, said hous
ing also having circumferential outlet channels
on opposite sides of said inlet channel, communi
cating with the respective series of outlet ports
and each increasing gradually in cross sectional
identical with said inlet ports in shape and ar 70 area from its point of connection with the ?rst
outlet port to its point of discharge.
rangement, and an inlet channel extending
about said casing, communicating with the inlet
CECIL A. MANN. -
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