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Патент USA US3084572

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April 9, 1963
Filed Sept. 29, 1958
2 Sheets-Sheet 1
l ‘A
W1 5W
April 9, 1963 ‘
Filed Sept. 29, 1958
2 Sheets-Sheet 2
Bernhardt T. Fitzpatrick, Burbank, Calif, assignor to Fitz
patrick Incorporated, Burbank, Calif, a corporation of
Filed Sept. 29, 1958, Set‘. No. 763,939
5 Claims. (Cl. 74-44)
My invention relates to rotary pumps and motors
Patented Apr. 9, 1963
section of which being provided with a ?anged coupling
14-, While the internally-positioned shaft end is provided
with a ‘?y wheel member 16 which is rotatably disposed
within said housing member 2, as shown.
A frontwardly extending rim 18'is provided in said
?y wheel member 16, wherein a set of connecting rod
pins 20 are mounted for holding suitable. connecting rods
22 in place, each connecting rod extending centripetally
toward the center and having a piston member 24 con
wherein reciprocal piston action is employed, having means 10 nected thereto and slidably disposed within their respec
for regulating and for controlling the piston strokes there
tive cylinder barrels 26 provided in a cylinder block mem
in, and thereby controlling the ?uid ‘?ow passing through
ber 28, as shown in FIG. 2.
said apparatus when in use and operation.
vA frontwardly extending rim 18 is provided in said
An object of my invention is to provide a rotary type
fly wheel member 1.6, wherein a set- of connecting rod
apparatus having a housing, wherein a rotatable cylinder 15 pins 29 are ‘mounted for holding suitable connecting rods
block is mounted and provided with a set of reciprocally
22 in place, each connecting rod extending centripetally
actuating pistons which are centripetally disposed in said
toward the center and having a piston member 24 con
cylinder ‘block, also, having means for variably regulating
nected thereto and slidably disposed within their respec
and adjusting the position of said cylinder block, so that
tive cylinder barrels 26 provided in a cylinder block
the piston strokes may be correspondingly regulated, and
member 28, as shown in FIG. 2.
thereby providing a variable ‘?uid ?ow when said appa
Said cylinder block 28 is revolubly mounted upon a
ratus is used as a pumping unit, or providing a variable
suitable cylinder block shaft 38, said shaft having a pair
power when said apparatus is employed as a motor or
prime mover.
of side passages 32 and 34, each of which having a front
wardly extending passage 36 and 38 respectively and
A further object of my invention is to provide said ap 25 adapted for connecting the respective ?uid conduits or
pipes 48 and 42, as shown in FIG; 3.
Each of said cylinder barrels 26 is provided with a con
suitably positioned eccentric bushings, and wherein the
necting passage 44, which is disposed in juxtaposition to
position and the rotation of which being controlled by
said side passages~32 and 34 of said cylinder block shaft
suitable gearing means, also, having a suitable power unit 30 30, also, said shaft 38 is provided with a suitable seal
for actuating said gearing means, thereby providing a vari
or packing 46, see FIG. 6, which is supported in place by
able piston stroke in said cylinder block when said appa
means of a lock nut 48.
ratus is in operation and for securing a variable ?uid
The opposite side of said passages 32 and 34 of said
?ow therethrough.
shaft member 30 is provided with an inner seal or pack
The invention also comprises novel details of con
ing 50 against which a front ?uid passage ring 52 is
struction and novel combinations and arrangements of
mounted, having a retaining seal or packing 54 disposed
parts, which will more fully appear in the course of the
against an outer ?uid passage ring 56, which is held in
following description.
place by means of a plate 58 and supported in position
Reference is now had to the accompanying drawings,
by a bearing member: 68 and also locked in place and
in which the similar reference characters denote the same 40 position by means of a suitable lock ring ‘member 62.
Said front ?uid passage ring 52 is, positioned over a
In the drawings:
?uid connecting passage 64 disposed in said shaft mem
‘FIG. 1 is a vertical sectional view of the rotary type
ber 30 and extending frontwardly for connecting with a
apparatus, disclosing my invention, taken on lines 1—1
suitable pipe connection 68, also, said ring 52>inter
of the FIG. 2.
connects with a hole or passage7tl disposed in said cylin
FIG. 2 is a partly elevational and partly vertically sec
der block 28, which leads to a plunger cylinder of the
paratus with a suitable center adjusting means for said
cylinder block which is actuated by means of a set of
tional view of the apparatus, taken on line 2-2 of FIG. 1.
iFIG. 3 shows a vertically elevational view of the appa~
ratus, taken from the right of FIG. 2.
FIGS. 4 and 4a are vertical sectional views of the eccen
tric driving unit, taken on the line 4-4 of ‘FIG. 2 and
showing the variable control means at its on-center and
extreme off-center positions, respectively.
off-center supporting plunger member 72, the purpose of
which will be presently described.
The outer ?uid passage ring 56 is positioned over a
hole or passage 74 which is alsoidisposed in said shaft
30, the location of which being diametrically opposite
to said passage 64, which extends frontwardly and con
meets with a suitable pipe connection 76‘, also, said pas
FIG. 5 shows a fragmentary and horizontally sectional
sage ring 56 interconnects with a hole or passage 78
View of the driving unit, taken on the staggered line 5—5
disposed in said cylinder block 28 and leading to the
of FIG. 4.
opposite end of the cylinder of said supporting plunger
FIG. 6 shows a fragmentary and slightly enlarged verti
member 72.
cally sectional view of the cylinder shaft, and the nif
Said off-center controlling plunger 72 is provided with
center supporting plunger, which is similar in position
a pointed tip 80 which is adapted to bear upon the sur
as shown in FIG. 2 disclosing ?uid passages in detail.
60 face of a conical bushing 82, said bushing‘ 82 being dis
‘BIG. 7 shows a sectional view of the cylinder shaft,
posed at the inner surface of: said ?y wheel 16 and in
showing same in mounted position, taken on line 7-7 of
juxtaposition of said cylinder block 28.
FIG. 2.
Said plunger 72 is slidably mounted in said cylinder
FIG. 8 is a fragmentary sectional view on the line 8-8
block 28 and is also provided with a suitable piston disc
of FIG. 4.
65 member 84 which is slidably mounted within a cylinder
‘Describing my invention more in detail, in its broader
86, said cylinder 86 being enclosed vby means of a
aspects, said invention comprises an apparatus having a
suitable cap member 88 which is provided with suitable
housing member 2 provided with a front cover 4 and a
?uid connecting passages 90.
rear cover 6 which are held in mounted position by means
The ?uid under pressure and passing through said pas
of suitable fastening members or screws 8,
sage 70‘ into said cylinder 86, causes the piston disc mem
Said rear cover 6 is provided with a suitable bearing
ber 84 to retract its position, aS shown-in FIGS. 2 and 6,
journal 18 wherein a shaft 12 is mounted, the outer end
thus causing the pointed tip 80 of said plunger 72 to
engage the outermost rim of said conical bushing 82
thereof which are also of less than a half circle in extent,
and the remainder of the inner face of said outer ec
and thereby supporting said cylinder block 28 in its
uppermost position, and, when the ?uid under pres
sure is forced through the passage 78 passing into said
cap member 88, then the ?uid passing through the pas
centric has rotary bearing engagement on the outer face
of the ring '94 thus holding the sectoral gears 108, 108
in proper meshing engagement with the gear 104, 104
and said outer eccentric is further provided with a slot
sage ‘90 causes the piston disc 84 to move in an opposite
extending therethrough from the outer to the inner
direction, so that when said pointed tip 80 reaches the
periphery thereof affording clearance for the shaft 96,
center section of said conical bushing 82, said cylinder
the worm ‘95 and the bracket 102 as the eccentric is
block 28 reaches the centrally neutral position, at which 10 caused to move in the manner hereinafter to be described.
time there is no reciprocal action imparted to said
Said cylinder shaft 30, at its frontward end, is pro
piston members 24.
vided with a pair of suitable guide ways 122, which are
It may be noted, that the number of said plungers 72
adapted for engaging a pair of guide members 124 dis
and said conical bushings in the apparatus, correspond
posed at the outer boss 126 of said front cover 4, and
with the number of the piston members 24 in said cylin
thereby preventing said cylinder shaft 30 from turning
der block 23, and that the frontward or the retracted
having only a sliding movement from its center into an
movement of said plungers 72 is made in unison with
off~center position, as shown in FIG. 2.
the off-center or into-center movement of said cylinder
When said cylinder shaft 30 remains in the center,
shaft 30, when actuated by auxiliary motor 92.
such position causes said cylinder block 28 to neutralize
The variable control of said cylinder block 28 together
the reciprocal action of said piston member 24 during
with said cylinder shaft 30, which may be from the cen
the rotation of said ?y wheel member 16 and said cylin
ter to any of the off-center positions, is accomplished by
der block 28, also, the hydraulically actuated support
the action of a pair of inner and outer eccentric mem
ing plungers 72 are forced outwardly, causing their
bers 110 and 112 which engage, respectively, the inner
pointed tips 80 to rest within said center section of
‘and outer faces of an interposed ring 94, as shown in 25 said conical bushings 82.
FIGS. 2, 4, 4a and 5, the construction and operation of
As above noted, when the axis of the shaft 30 is
which control will be presently described.
coincident with the axial line of the shaft 12 and the
Said auxiliary motor 92 is reversible in its rotation and
?ywheel mounted thereon, the pistons 24 partake of no
operation, and is mounted upon the outer section of said
relative movement in their respective cylinders. That
front cover 4, as shown in FIGS. 2 and 3, having a drive 30 position is shown in FIG. 4a. When it is desired to cause
shaft ‘96 extending upwardly and passing internally of
said cover, also said shaft having the internally extending
end provided with a suitable worm member 98 keyed
thereto and slidably mounted thereon and which is
held in mesh with a suitable worm gear 100 and supported
in place by means of a suitable end bracket member
102 having bearing engagement with said shaft at each
the device to operate as a pump or a motor, the motor
92 is actuated to cause the worm to drive the worm gear
100 in a counterclockwise direction as viewed in FIGS.
4 and 4a. This causes the gears 104, 104 to shift the
outer eccentric 112 in a counterclockwise direction and
simultaneously move the inner eccentric 110 in a clock
wise direction bringing the high points of the eccentrics
end of said worm member.
Said worm gear 100 is mounted upon a cross shaft 101
to the under side of the shaft 30 as viewed in said ?g
ure and therefore shifting said shaft 30 upwardly as
also journaled in said bracket member 102 and has a 40 viewed in those ?gures. This, of course, causes rela
pair of spur gears 104, 104 disposed one each at each
tive upward movement of the ring 94 to the extent of the
side of said bracket.
change effected by the said movement of the outer ec
Secured by screws 120 on the inner face of the front
centric 112 and since the shaft 101 carrying said gears
cover 4 and disposed in coaxial relation to the axial
is journaled in said ring at the opposite sides of the
line of the shaft 12 is a mounting ring 118 provided on 45 slot therein, said shaft will carry the worm gear 100,
its inner face with recesses for the outer races of spaced
the bracket 102 and the worm 98 with it; said worm 98
ball bearing assemblies 116, 116, the inner races of which
having a splined engagement with the end of the shaft
are seated in complementary recesses in the outer
96. This will result in the pistons having reciprocatory
periphery of the outer eccentric member 112. The in
movement in their cylinder bores as the ?ywheel and
ner eccentric member 110 is rotatably mounted on the
cylinder block are rotated. It will, of course, be under—
shaft 30 and on its outer face is provided with laterally
stood that the above described control may be moved
spaced peripheral recesses in which the inner races of
to any desired intermediate position between the ex
ball bearing assemblies 111, 111 are seated, the outer
treme positions of control illustrated in FIGS. 4 and 4a.
races of said ball bearing assemblies being seated in com
When said cylinder ‘block 28 is in an off-center posi
plementary recesses on the inner face of the ring 94.
tion, said supporting plungers 72 are simultaneously
The ring ‘94 has coaxially disposed inner and outer faces
and further has a slot extending therethrough between the
inner and outer faces aifording clearance for the bracket
actuated, causing the pointed tips 80‘ to rest against the
conical wall of said conical bushings 82, and thereby
maintaining a position and a synchronized rotation of
102, the upper end of the shaft ‘96, the worm 98, the
said cylinder block 28 and said ?y wheel member 16'
worm wheel 100 and the gears 104, 104 and the shaft 60 when in motion.
101 projects beyond said gears and the ends thereof are
It may be noted, that the operation of said auxiliary
journaled in the ring 94 at opposite sides of the said
motor 92 and said eccentric members ‘94 together with
clearance slot as best shown in FIG. 8.
the supporting plungers ‘72 when operated in synchronism,
The outer periphery of the inner eccentric 110 for a
a variable off-center position of said cylinder block 28
portion of its length of substantially less than 180° in
may be had.
extent is provided with spaced parallel sectoral sets of
gear teeth 106, 106 which mesh with the gears 104, 104;
Therefore, when forcing a ?uid into the pipe 40, said
?uid passing through the fluid passage 36 and the side
the bearing engagement provided by the bearings 111
passage 32 and then through the cylinder connecting
serving to maintain the proper meshing engagement be
passages 44 into said cylinder barrels 26, said cylinder
tween the thus inter-meshed gears and it will be noted 70 block 28 including said ?y wheel 16 together with the
that the inner eccentric member has a recess formed
shaft 12 will turn in a clock-wise direction, the discharge
therein between said sectoral gears 106, 106 affording
of the ?uid being through the side passage 34 and then
clearance for the worm gear 100.
through the ?uid passage 38 discharging through the
pipe 42.
The outer eccentric 112, likewise, is provided with a
pair of sectoral gear portions on the inner periphery
The rotation of said ?y wheel 16 and said cylinder
block 28 may be had in an opposite direction when the
?uid ?ow passing through the apparatus is reversed, that
is, when the pipe 42 is used for the intake and the pipe
40 is employed as a discharge pipe of the apparatus.
Then, when applying a power to said shaft 12 of
the apparatus, thereby causing the ?y wheel 16 together
?ywheel with resultant variation and the relative length
of stroke of said pistons in said cylinder bores deriving
from the offset of the axes of rotation of said ?ywheel
and said cylinder block.
2. A rotary, radial piston device as claimed in claim 1
in which said ?ywheel and said cylinder block carry in
terengaging means for eifecting rotation in unison of said
?ywheel and said cylinder block and in which said por
with said cylinder block 28 to turn, the relative rotative
position of said ?y wheel 16 and said cylinder block 28
tion of said means on said cylinder block means includes
being maintained in synchromism and supported by means
of said plungers 72 and thereby causing a reciprocal 10 ?uid pressure actuated devices automatically compensat
ing for different extents of axial oifset of said cylinder
action of said piston members 24, the apparatus will then
block relative to said ?ywheel.
operate as a pump, and the pipes 40‘ or 42 may be
3. A rotary, radial piston device as claimed in claim
either an intake or discharge pipe, depending in which
which said means for shifting said ?xed shaft and said
direction said cylinder block 28 is rotated, the variable
position of said shaft 30‘ providing a variable piston stroke 15 cylinder ‘block laterally includes a pair of nested eccentric
members interposed between said housing and said ?xed
in said cylinder barrels, so that a variable quantity of ?uid
shaft and means for .simultaneously rotating said eccen
may be circulated through said apparatus when in opera~
trics relative to one another to move the high points
thereof into or out of alignment.
Having thus described my invention what I claim as
4. A rotary, radial piston device as claimed in claim 3
new and desire to secure by Letters Patent, is:
in which said means for shifting said ?xed shaft and said
1. In a rotary, radial piston, variable displacement de
cylinder block laterally includes a ring of uniform radial
vice optionally usable as a pump or motor, a ?xed shaft,
dimension interposed between and having bearing engage
a cylinder block mounted for rotation on said shaft and
ment with said eccentrics and further having gear means
having a plurality of uniformly circumferentially spaced
radial cylinder bores extending from the outer periphery of 25 engaging said eccentrics effective to cause said simul
taneous rotative movement of said eccentrics relative to
said cylinder block to the hearing by which said cylinder
block is mounted on said ?xed shaft, a housing surround
ing said cylinder block, a ?ywheel member within said
each other.
5. A rotary, radial piston device as claimed in claim 4
in which said gear means carried by said ring includes an
housing and having a rim portion overhanging the outer
periphery of said cylinder block, a shaft journaled in a 30 operating shaft extending through said housing to the
exterior of said housing and further includes a reversible
bearing in said housing and carrying said ?ywheel, a plu
motor for operating said shaft in a desired direction with
rality of pistons disposed one each in each of said cylin
resultant movement of said ?xed shaft and said cylinder
der bores in said cylinder block, a plurality of piston rods
each having one end attached to one each of said pistons
and having the opposite end thereof connected to said
block toward and from the axial line of said shaft on
which said ?ywheel is mounted.
?ywheel at equally circumferentially spaced points there
on for oscillatory movement about an axis parallel to the
axis of said shaft on which said ?ywheel is mounted, means
for conducting ?uid through said ?xed shaft to said
cylinders as they pass through a predetermined segment 40
of the circumference of said ?xed shaft incident to rota
tion of said cylinder block thereon and other means for
conducting ?uid from said cylinders through said ?xed
shaft incident to rotation of said cylinder block through
a diametrically opposite segment of the circumference of 45
said ?xed shaft, ?uid pressure actuated means for causing
said cylinder block and said ?ywheel to rotate in unison,
and means extending between said housing and said ?xed
shaft operable from the exterior of said housing to shift
said ?xed shaft and said cylinder block laterally toward 50
and from a point at which the axis of said ?xed shaft is
coincident with the axial line of said shaft carrying said
References Cited in the ?le of this patent
Sinclair ______________ __ July 11, 1905
Parker ______________ __ June 10, 1930
Landenberger ________ __ Sept. 20,
Laessker ____________ __ Apr. 24,
Soldon ______________ __ July 16,
Dake _______________ __ Aug. 18,
Garratt ______________ __ May 10,
Dusevoir et al. _______ .._ Oct. 3,
Thompson ____________ __ Jan. 7,
De Villiers __________ __ Apr. 15,
Moulden ____________ .._ Sept. 18,
Bradley ______________ __ Apr. 8, 1952
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