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Патент USA US2404229

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.1. o. HAMREN~ Y
Filed Jan. 50, 1941
s Sheets-Sheet 1'
July 16, 1946.
_ Filed Jan. 50, 1941
5 Sheets-Sheet 2
daszp/l 0 Ham/aw
July 16, 1946.
_ -_
Filed Jan. 30, 1941
5 Sheets-Sheet 3_
- Q‘
' July 16, 1946.
Filed Jan.- so', 1941
5 Sheets-Sheets
Patented July '16, 1946 I
2,404,229 ‘
' 25404329 Y
Joseph 0.
30, Minneapolis”
1941,, ‘Seriall"No.’376;626
16 ‘Claims.
of rotors for each ~shaft,the rotors of eachpair
being arranged to be driven inoppositedirece
This invention relates‘to a powertransmitting
means and particularly to a variable speed trans
tions -'f or iproducingvforward and' rearward speeds
together with means for connecting the desired
mitter of the ?uid type adaptedfor use in driving
an automotive vehicle.
‘The particular-‘type of-?uid transmitterissim- .
ilarrto'that'inapplicant’s Patent Number L966; '
‘rotors to said shafts.
892, granted July 1'7. 19-34, for “Turbine,” to
which patent reference will “be ‘made. ,The pres
ent vinvention embodies improvements upon'the
invention-Willbe fullyset forth in the following
These‘ and other : objects and advantages of. the
description-madein connection with the accom
pany-ing drawingslin which like referencechar
10 acters refer tosimilar parts throughout thetsev- '
?'device disclosed in said patent.‘
‘‘ ,It-‘isanobject-of thisinvention to provide a
eral views and in which:
4 ‘Fig. -‘l is atop ‘plan viewv diagrammatically
simple "and ef?cient variable speed ?uid trans
showing the frame, ‘wheelsand part of the body
mission device which may be easily installed in
‘of an automobile vwith “the invention applied
automotive vehicles.‘ The ‘power transmission de
"Vice-per sells of course, capable ‘of vvariedother 15
i'FlgfZ, is'agpartial view‘similar to Fig; 'ltshown
on an chlargeds'cale, some‘ parts being vbroken
fIt is-a further‘object of the invention to provide
a ‘variable speed ?uid transmissionnnit which
is capable of transmitting power with gradual
variations in speed.
. V
‘Fig. ; 3 (is ~ a 1 fragmentary section taken on line
someparts'being‘ shown in side elevation;
on line = 5-15 ' of Fig. 4~as indicated by the arrows;
'=Fig. dis a vertical-section taken’ substantially '
' It=is also an object of (the invention to'pro
on line 1'6—'6 of Fig. 4'as‘indicated by the arrows;
vide a variable speed ?uid transmission‘ unit which
maybe used in an automotivevehicle and’ form
~a‘-\-dualJdrive‘-kfor the ‘wheels thereof ‘a clutch not
' j-Fig.'_5’is a-lvertical section taken substantially
‘vehicle and which‘ is adapted to'be connected’ to
and drive the rear wheels of said vehicle.
'on line 4—-4 ofFig; 5 as indicated by the-arrows; ~
which maybe easily installed in an‘automotive
EFig. 4l>isia vertical'section takensubstantially
_Another object of=the inventionisj to provide a
simple ‘and efficient power transmitting unit
being used;
’-‘Fig'.- 7 is a top plan. view of the transmission
30. ‘ulllt-ysOIlle parts-‘being broken away and, others
v'It isalso an object‘ of the inventionto "pro
{shown in- horizontalsection.
*Refve‘rring‘ tothe drawings; particularly Fig. 1, r
vide a structure comprising ‘a ?uid transmission
theoutline of an automotive vehicle is shown
device having units arranged to bedrivenin op
whereinathe' chassis in general is designated H.
.Posite Y» directions and to be connected with the
wheels of the automobile.
.35 ‘Said vehicle-is equipped with-the conventional
' engine I'Zsuch as one of" the internal combustion
It‘ is further an object of the inventionto pro
type. ‘Connected tol'and driven by. the engine in
videan automotive vehicle With- a-?uid transmis
anyrsuitablemanner isapump I3. While .vari
sion device comprising-a pair, of shafts, aupair
vous types‘ ofpumps might be used, preferably one
‘of lrotors for each shaft, the~rotors of said pairs
{being arranged to be driven in‘ Opposite directions 40 capable ofpositively circulating a liquid through
the system and of building up a pressure therein
to ‘ provide forward and rearward drives, “said
‘shafts being - adapted to be connected to the
‘is-used. A ‘discharge pipe "[4 and inletpipe 15
wheels of the vehicle.
‘are connected to ‘pump I3 and these pipes are
connected'attheir Y other ends to my-variable
It is still another object of the invention to
45“?uid power -' transmitting unit mounted on- the
rear axle ‘of the'vehicle H and designated gen
mission device comprising a. pair'bfyshaftsar- '
erally-I6. Various means for mounting unit Hi
‘ranged to‘ be connected to'the‘ Wheels of the ‘ve
on the vehicle‘or aspart of’ therear axlestruc
hiclega pair of rotors’ for each shaft and sleeves
ture'mayi'beused- as long as it be so mounted that
enclosing said rotors ‘adapted to be relatively
‘provide an automotive vehicle with a ?uid'trans
vmoved to-supply ?uid to the "desired-rotors for
1 forwarder rearwardvdriving.
'- It‘ is a further object of the invention'to pro
-v_ide 'an ‘automotive vehicle with'a ?uid trans
mission ‘device comprising shafts adapted;to ‘be
-=connected to the Wheels vcf‘said'vehicle,a 'pair
unit l6’ can be connected in any suitable manner
‘to the rear wheels 33‘ and, 34 of said vehicle.
;Means"is_ also provided for controlling the de
vice ' to eiiect variable speeds in transmitting
,said'rearwheels. vWhile this. means
could- take ~variousjforms, _in the embodiment "of
said rotors and'end plates 56 seatedyin recesses
crossbar I‘! mounted on the unit [6, said crossbar
in turn being connected at opposite ends to rods
carried in ball bearingcages 55 disposed between
the invention illustrated, thesame comprises a
V in end members 2B'and 29 ‘respectively;
bers 55 have oil grooves 55a therein. Rotors 5|
and 52 are similar and theserbear at theiradja- 77
cent sides on ball bearings carried in ball bear
ing cages 58 disposed between said rotors and a
transversely extending supporting member 59
or cables 18 and I9 respectively which are con
nected to and controlled by foot pedals 20 and
2| respectively. The mechanism operated‘ by
the crossbar I‘! will be later described in connec
tion'with the means for controlling the speeds of
disposed and ?tting within sleeve 48 ‘and secured
In Figs’; 4 to v the unit It is illustrated more 10 therein by the screws 60 having‘heads ‘counter
Vmy device.
sunk in sleeves 48. Cages 58 also have oil grooves
in detail. The mechanism shown in said ?gures
58a therein at opposite sides thereof.
is a re?nement of an improvement upon that =
It will
‘thus be seenthat said rotors rotate in ball bear
shown in the patent above identi?ed; Said-unit -
comprises a casing having end portions 28‘and';
' ings at their'end portions. Supporting member ’
459 also carries ball bearings‘ 6| in which the in- '
ner'ends of'shafts 3i! and 32 are journaled, the
29 and a peripheral portion 21.1 End/members
28 and 29 have disposed therein ball'bearings35 ~
and a sealing member 31 is providedat the outer
side of each of said bearings. Shafts30 "and 32
are journaled in bearings 35 respectively having
splined portionsiprojectingto the outer side of 20
adjacent ends'of said shafts being reduced in
- diameter; The rotors 5t] and '53 which as stated,_
are similar have ?ange-like outer portions in
which are threaded the pivot studs 63 upon which
Tthex'end members 28 and 29, which portionsvwill
are pivotally mounted the vanes 64. V Itxwill be
be; connected in any desired wayxwith the wheels
came 34.‘ End plates 39rvare secured to the ends
of end members 28 and 29 by, bolts 40, said shafts
extending through said end plates.» Endlmem
noted. that, studs 63 have collars adjacent the
and‘ 28a forthe transmissioniof. ?uid as will be
being secured tomember 68 by screws 12‘ having
their'heads countersunknin saidcarn, said cam is
.thuslheld in stationary position. vAs shown in
rotor ?anges which are seated in recesses in said
.vanes and rings 65 are preferably securedto studs
25 63 by the screws 61. having heads countersunk
in said rings. Rings 66 areseated in recesses in
ber 28. has an annular chamber 28a therein which
members 68 which are ?tted in the inner sleeve
communicates with an outlet conduit 28b.v form
48 and held stationery therein by screws 59 hav
inglpart of end member 28, the samehaving- a
flange 280 at its end to which asimilar ?ange ; ing their'heads countersunk. in said sleeve. A
on conduit I5 is connectedjby suitable bolts, (not 30 cam; member 'H' is secured within the path of ' ‘
vanes ‘64 and pivotstuds 63, said cam member
shown); End member 28 has inletnopenings 28d
later described. End member_29 has an annular
chamber 29a and also’ hasinlet passages -2_5b;and a
29c therein.‘ Passages 28a‘and 29arare connected 35
zbyjal passage 44 extending longitudinally of the
Fig. 5. ‘each vane .64 has a hub journaled on pivot
:formed in an enlargement atone side of member
‘63.,and [has a portion, extending from said hub
with ,a‘ curved lower side bearing on the. periph
ery of. cam .member ll. Cam member ‘H has. a
.:projection 2la;~at; one side thereof to ‘which is
openings 'l'lb between said portions respectively.
\ connected a member 45;. JPortion 21a has a cen
As" shown in Fig. 5, said curved portions of vanes
64 ride upon the peripheryof cam 1|. vIt will
casing as shownrin Figs. 4 and 5. Passage 7414'. is
plurality of portions ‘Ha, extending eccentrically
21. Endmembers 28 and 29 are secured to_mem
peril‘! by the headed screws '4! s Member 2'l;has a 40 to shafts 3i] and 32 and said camhas ports 'or
tral part 211) and‘ passages 2'lcrand 21d’ extend
‘throughportion 21a at .eachside of portion 21b:
also be seen that vanes 64 have their upper sure
§into'-v the ‘chamber 21e_ immediately within the 45, "faces provided with’ curved portions 64a having
thesame as the curvature of the hub portions of "
'rportion’2'lz Member 45 constitutes a’ conduit, ‘the
passage therethrough' being dividedbya central
said vanes.‘ Rotors 59' and 53. also have’ passages
50a and 53a extending therethrough just at the
rib 45a. VA sleeve “is provided which is con
ycentric with member 21 and which is provided‘ ' 'outer side of their hub portions; Rotors 50" and
with end ?anges 41a bearing at their; ends against
55 are also provided with ratchet or clutch teeth '
thejend‘ members 28 and 29 respectively. Said’ t5ilbland 531). at their inner sides.
?anges have passages 41b therethrough which are '
'The rotors 5| and'52 are as stated, also similar
and have hub portions carrying the ball bearing
adapted to register with the inlet openingsZBc
and 286 respectively in members 28'jand 29; \ assemblies 13 so that said rotors revolve on said
Sleeve 41 is mounted for rotation on a second 55 bearings about-shafts 30 and 32.
sleeve 48 about which it ?ts tightly, sleeve 48
being: held stationary by dowel pins 49 extend
ing'through end members 28 and 29vrespectively
thereinto, Sleeve 4'! is also formed with a series
The rotors
5| and 52 have flange-like portions in which are
threaded the pivotstuds 14 on which are oscil
latably mounted the vanes 15. Vanes 15 are simi
lar to vanes 64 on rotors 50and 53 except that '
of ports or openings 410 in the wall thereof and 60 they extendin the direction opposite to'_those
the sleeve 48 is formed with a series of openings
ll?bradapted to register with the series of open
on rotors 55 and 53. It willbe seen that adja
cent the rotors the studs 14 have collars thereon
ings 41c upon properrelativegrotation of sleeves
4’! and '48.’ A second series’ of ports or openings
41d are formed in the sleeve 41 and‘ these are
arranged to register with a second series of ports
or openings 480 in the inner sleeve 48.
I seated in recesses in vanes 15 and rings 16 are
a Within the sleeve 48 and between end-mem
screws 80 having their heads countersunkthere
said cams thus being held in stationary posi
bers~28 and 29'are mountedfour rotors or rotat
secured‘ to‘l‘the ends of. studs" ‘I4 "by screws 11.
Rings 16 are seated inrecesses in supporting mem
,ber '68,. <Acam ‘I9 is disposed within the pathof
.vanes 15 being secured’ to :member 68 “by, the
ing units-designated 50, 5|, 52 and '53. ' These 70 tion. Cams 19 are similar to cams ‘H having the
units have-hubs containing vball bearing assem
bl-ies-54, '13, 13 and 51 respectivelyupon which
said rotors are mounted ‘for rotation about shafts
plurality of eccentric portions 19a and the open-7
ings'lQb thereb'etween; the cams 19 however;
beingarranged reversely to cams ‘H. 'Rotors'5l
130~and 32. Rotors 50 and, 55 are similar in con-‘ ' sand 52' have ratchet'or clutch teeth 5m and 52a
struction and these bear against ball bearings
at their remote sides.‘
iiigttingytl'ifespaced {keys 83 on ‘shaft )30.
tation ‘on therotor. It may be stated that'the
rings 66 and 68 act as sealing means for the
1iquid and also as reinforcing supports for'studs
63. The rotorsi? and
are ~thus driven‘and
since they'are-‘connected'by the membersBZ and
'92 _to 'the ‘shafts 30 and ~32 ‘respectively, these
shafts-are driven and ‘power isltra‘n'smitted‘to the
“a‘se‘g'inént orv'omutilat‘ed‘gear as. A rack 9|
having teeth “at iits’cenvtral ‘portion with which
thete'ethp on “gear 88 mesh, is’disposed at o‘ne‘side
‘rear wheels Y33 and ‘340i ‘the vehicle. ' The vvve
of ‘gear 8B'an‘d secured to the ‘outer side‘o'f‘sleeve
hicle is thus driven‘in a forward direction. "It
will be understood that by manipulation of~pedals
2D and 2| the operator can bring lthe passages
Mc‘an‘d 43b‘as well as passages ‘4Tb ‘and'2'8e, 290
more or less into register and the speed of rota
literv a2 ‘longitudinally o‘fjshaft vv3a. ‘Member 82
tion of the rotors and thus the ‘power delivered
' has‘clutch ~teeth fat ‘each ‘side thereof “ adapted ‘to
lie‘énéa‘gedwith the clutchgteeth 50b and 51a, on
the rotors “150 'and "5|. In {Fig.4 member '82 ‘is
shojvfnas‘oonnected ‘to rotor ~50,’ A"me'm_ber 92
"surface‘is‘continuously‘ "exposed to the liquid‘so
that‘th‘e‘re isvincreasingpressure and force of iro
Member '82, ‘ifsJbore‘d "at ‘one ‘side to receive ~‘tne
e‘n'dfoi ‘a pin'8‘5awhichiis'carried onfaishaft B6
jodrf sled’ “in member {68. Shaft ‘"86 extends
through sleeve ‘48 ‘and through a slot‘ "He ‘in
sleeve 4'Tand’has’securedthereto outside of sleeve
41 byfthe straws-e9 having-‘their heads counter
‘sunkither'ein, __It_. will ‘be seen that-‘rotation of
gearf?tandshaft 86 willo‘c'ause movement‘ of mend
down‘ the surfaces of vcam portions 311 a» a vgreater
5|; thiesame'béinsisplined:tQaIid
sli' able'fl ‘ngi'tu'dinally ‘to "shaftv (30’, the "splines
pumpira. @It‘jwill ben‘ot'ed that a's-l‘the ‘vanes ride
"ember? aj2 "surrounds shaft fttl‘be'twfe'e'n
‘to the Wheels of‘the‘vehiclalnay be determined
20 at the will of the operator.
It will be understood
that when openings "41c and 48b ‘are partly in
similarin 'all’respects 'toimembe'r 82‘, is splin‘ed'to
shaft trend secured by‘ the jke‘y'sres thereon.
register some of the fluid‘ from chamber ‘216
bypasses through openings 4"") and 2-8e and 250.
Any speed from zero to maximum speed 'can‘be
easily and quickly produced.
by ‘:68, saidshaft extending through sleeve ‘48
Whenit is desired to have rearward motion
on the vehicle ‘the operator ‘will manipulate pedals
Member? is‘nio've‘dby alpin 96a carried ‘by a
shait_"98 j'our‘naled in'thejother "supporting me'm- '
itrirough ‘a ‘slot 41;‘ "in “sleeve '41 and having
e ur‘edtoit's outer end and 'atl'the outer side/of
‘e‘?wa mutilated‘ge'ar 99. Gear "99 is similar
720'and 2| to move bar I1 ‘and thus’move pin 84 '
to (gear [8:8 and "adapted ‘to ‘ ‘mesh ‘ with, the - teeth
and sleevejd'l. Sleeve“ can-be moved to bring
passages 41d and 480 into alignment as ‘shown
oh'fr’ack‘ll'?‘l isecllred‘to the outersi'de of sleeve-41
'y‘ the "is ews vHill, said screws having counter
enter ' member “'45 '> and ‘pass ‘ through vpassage ~2‘Ic,
in Fig. 6.“ When "this is [done the liquid will
‘passage "21d now-being {closed-by plate rider-and
pass iintothe ‘chamber '2~'!e_ between emejmberi'l
" “"A‘s "shown inli‘i‘gs.Zandv 3‘ a stud85‘is journaled
‘in one end of member 21 and has a reduced~por~
tijonektending through bar ll midway of the
latter. ‘Said reduced portion is threaded and
hasfa j'nut'thereon at the outer side ‘of bar l1.
‘Stud 85 has secured'ther‘eto ‘within member. 21
‘arm '81. Arm ‘81 extends ‘longitudinally of
. "and’sleeve-ld‘l. “The liquidithen 'passestthroug'h
passages ‘Hit-arid 41780 into ‘engagementwitnthe
bla‘des‘or vanes-115‘. y-Theseiaret'acted upon-"by‘ithe ‘
'liquid~as-previfously described in- ‘connection with
vanes £64., *l'tfotorsltl “and 52 van: "thus rotated.
jWhen sleeve-‘41 was rotated as ‘stated, racks ‘9 l and
and between members 21 and 41 and has a fork at
?ll -were‘*moved with -the~sleev_e‘ and theseen‘ga‘ged
its ‘end embracing a'pin '84'secured t0 sleeve 41.
"In conjunction with ‘passages '210 and 21d a
‘with or meshed-with thege'ars '88>~and59'9,~thus
plate??'isvrrsecured to sleeve 41 ‘and when ‘pas
‘moving ‘members -‘ 82 and
‘s’ag‘es“4'fd‘and“48c ‘are in ‘register ‘sleeve ‘I 05 closes
bers moved into engagement and became clutched
sage'i‘l‘d asz‘sho'wn in Fig.
‘Another plate
‘I115 salsa carried by sleevej? and when pas
'lc‘andij‘4‘8b ‘are ‘in’regi‘s‘ter, said plate‘ H16
‘tothelrdtorsil“2.116.552. J'Rotors'tu ?nd-SS-Wéfe
1212 s‘es passage'?c.
' ,
fIn' bp'eration, the‘iri‘otor 1'2 of, the automotive
'vfehicle‘will be operated "asusualand pump I3
will‘be'operated to circulate a liquid'such as oil
(i‘ndtlie ‘system including memberjIG, conduits l4
ai‘id‘l‘5'and‘said pump. ‘With the parts in the
‘position ‘shown ‘in Figs. 1, 4 and 5 the ?uid from
‘rotating the same With‘the ‘ 'shafts'f??i ‘and "96 thus
‘so ithat said mem
at: the ‘ same time ‘disconnected’ so that ‘*shafts~~30
and 32 will be driven in‘the reverse‘dir'ection‘and
the'vehicle will be moved'rearwardly. Thespeedv
“(of the ‘rearward-‘movement can be’regulated-‘and
determined by?ithe operator by manipulation ‘of
"p'edalsZD-and "2|. jThe‘dev‘ice can be'placgedin
neutral“ position'by ‘having bar “H midwayof-t‘he
'two'po'sitions indicated in FiggZ. Hit that‘ time’
‘neither of the‘ twoseries of openings ~‘4'lc and‘48‘b
‘or “(Z ‘and 480 will 3‘be "in register. However,
c‘ohduit I l341wi11'enter member“ and pass through
j'openings‘?b'will be brought intoregister respec
passage ~21d into the‘ chamber 216 between mem
tively "with _'openin‘gs 28e "and"2f9c. The liquid
ber 21 and sleeve “41. The liquid then passes
'circulated‘will then pass through the later open
through openings 41c’and-48b which are in re’;
ist'er. "Referring to Fig. 5, the liquid then en ‘to ‘ings "or’pas‘sages into'the chambers 28a'and “29a
'g‘ag‘esfth‘e upper ‘sides of the vanes 64. The open
and. thence ‘into conduit "28?) ‘and back’ to‘the
pump. The liquid is thus merely bypassed when
ings ‘?e‘andl?b are directed against the vanes
ia'lnd‘are inleffectl nozzle inlets~ to ‘the rotors. The
thedevice is in ‘neutral position.
*From the above description it will be seen'tl'iat
"liquid facts "ondthe vanes?tcausing rotation of,
'I have provided a simpleyco'm'pact and highly
otors’50 ‘and 53 and as this rotation occurs the
‘i'oranesjri‘d'ejdown theinwardly extending surfaces
efficient structure for producingvarious forward
.of portions‘l'l don-cam 1 l . When the vanes reach
‘and rearwardspeeds on the‘ vehicle. In practice
‘pump 13 "will produce 'a ‘pressure su?icient to
"the ‘epenings ‘Ilb‘the liquid is released and dis
carry the vload‘regardless of the amount of'r‘egis
ic'ha'grg‘e'd "through ‘said openings and will pass
"throughiopénings 50a and ‘53a and’then‘through‘ 70 "ter of the openings 41;: and 482) or 41d and"48c.
There will always be therefore, su?icient power
:Qpenings ‘28dfa‘nd '29?) into " Chambers 72811 and
for'the vehicle. It will also‘ be seen that ‘whether
f29alaindithe liquid ‘from chamber 29a'wil1 pass
*thrpughjsassagem into passage 28b-and the liq- '
"the two rotors ‘"510 and '53 'are operating‘ together
lui'd‘ii'omr‘ehamber 28d willals‘o pass out through
or‘ the two rotors‘ 5| and 52 are operating'together,
“passage 28b "andl‘into conduit ii‘and back'to
and ‘It so there will be very'littleffriction be
sleeve, a rotor» mounted within said inner cas
ing comprising a plurality of vanes .‘oscillatable
about. axes parallel to thelaxis of said rotorand
adapted to be rotated by a liquid under pressure
delivered through said ports,=a cam member with!
tweenthevanes and-saidivcams. V'Ifhe partsare
designed for easy manufacture and easerof'iase
sembly. . It will be apparent that-the devicerrwill
have a high degree of utility for, the purp'ose'in
in and‘eng'aged ‘by’ said vanes, means for sup.
Vplyin'gl liquid under pressureito said ‘annular
chamber and means for rotating said sleeve’ to
register said'ports to admit, ?uid :to said rotor.
ltewill, of course, be understood-that various
changes maybe made in the form, details, ar
rangement and proportions of, the parts,vwith
V out ‘departingfrom the scope of applicant’s in
comprising a casing, an innerlcasing ?xedly
What is claimed is:
mounted within said casing, a pair of rotors
mountedrwithin saidinner casing and ,having 7
appended claims.
disclosed and de?ned in the
5.,An hydraulic variable speed transmission .
vention, whichv generally- stated, consists in a
devicevcapable of carrying out the objects above
set ‘forth, in the parts and combinations of parts
means thereon arranged respectively to be rotated
15 in reverse directions by liquid underpressure'a '
1.'A transmissionjunit having incombination,
sleeve rotatably mounted'on said inner casing
a casing, two pairs'of rotors in said casing each
comprising arplurality of circumferentially spaced
and formingan annular chamber between‘the
same‘ and said casing, means for deliveringifluid
under pressure to said chamber; said inner'cas
ing having two series of inlet ports therein, one
of said series being arranged toladmit liquid to
one of said rotors to rotate it in'a‘forward direc
oscillating vanes, a pair of shafts journaled in
‘said 'casingfconcentric with said>rotors,_ a sec
ond casing within said casing and-concentric
with said rotors,<means for supplying ?uid under
pressure to said‘ second casing at circumferen
tially spaced points to drive one rotor of each pair
in one direction, means for supplying ?uid: to
said second casing at circum‘ferentially spaced
points to drive the other rotor of each pair in
the opposite direction and means in 'said'casing
tion and the other vofesaid series being arranged
to admit liquid under pressure'tosaid second
rotor to rotate it in a reverse direction and said
sleeve having two series of ports'therein adapted
to connect said series of inlet ports respectively 7
with said annular chamber, means for sufpplying
for connecting one of said rotors of each pair to a
liquid under pressure to said annular chamber
one of said shafts and for connecting the other
V 2. A transmission unit having in combination,
and means for rotating said sleeve to register
one series of sleeve ports with one series‘ of in
let ports or alternately to register the other se;
a casing, an inner casing within and spaced from
a said casing, means ‘for ‘delivering ?uid under
let ports to thus admit liquid selectively toi‘said
rotor of each pair to the other of said shafts.» '
ries of sleeve'ports with the other series of in
pressure between saidrcasings, a ‘pair of rotors 35
within said inner casinghaving means thereon
combination, a variable speedtransmission unit
' said rotors, a sleeve rotatable on said inner cas- ‘
comprising a casing, a_ pair of. ?uid driven rotors
in said casing, a. shaft ,jour'naled at its ends in
ing,‘ said sleeve and inner ,casingf having a se
6. An automotive vehicle structure ‘having ‘in
adapted to be ‘engaged by said ?uid ‘for driving
ries of openings therethroug'h adapted to‘ be
said casing about'whioh'said rotors rotateimeans
brought into register for admitting ?uid under
pressure to jone of said rotors to drive the same
in one directionbsaid inner casing and’ sleeve
having a secondseries of openings therethrough
adapted to be brought into register for admitting
?uid under pressure to the other of’ said rotors
fort/driving it in a_ direction opposite to said
for supplying ?uid under pressure to said ‘rotors
?rst mentioned rotor;
= »
to rotate them in opposite directionsrespectively ,
and'means' within said, casing fordirectly con-'
,,necting said rotors alternately to said shaft. ‘
45 a
7.- A transmissionunit comprising a casing, two
pairs'of rotorsin‘ said casingsai'd rotors each
7 ‘comprising circumferentially, spaced oscillatable
vanes, means for supplying ?uid under pressure
3.;Ay-transmission unit having inv combination,
to said casing to engage said vanes and rotate
"a casing; an inner casing spaced from said cas 50 rotors of each‘of said pairs in opposite directions,
a pair of coaxially arranged shafts disposed'sube
ingv forming a chamber, meansffor delivering
n?uidunder pressure tov'said chamber,’ afsl'eeve
stantially wholly within said casing ‘atthecen
ters of and coaxial with said rotors; and means
mounted on said inner casing for rotation there
for selectively and directly'connecting one rotor
on; apair of rotors in saidlinner casing each
having a’ series of vanes oscillatably mounted ,55 of each pair to said shafts respectively so that
thereon, cams ‘on which said vanes move in the
rotation of said rotors, openings in said innerlcasl
ing and sleeve adapted to be brought into’ register‘
for admitting ?uid to one of'said rotors, a sec
ond set of openings in said inner casing and sleeve .60
‘adapted to be brought into register‘ for admitting
?uid into the other of said‘ rotors,'said vrotors
being driven in opposite directions‘, said ?uid
acting on said vanes and passing out through
said shafts may each, be driven in oppositevdi
rections one pair of said rotors being idle while
the other pair is ‘being driven.
8; A ?uid transmission device having in com
bination, a casing, a pair of rotors-insaid casing
having means thereon adapted to be‘eng'aged by
?uid for driving said rotors, a second pair. of
rotors in said casing having means'thereon' adapt;
‘ ed to be engaged by ?uid for driving said rotors
said cams‘ and a shaft to which said rotors may 65 coaxial with said ?rst mentioned rotors and ar
be selectively connected.
4. An hydraulic variable speed transmission
comprising a casing,v an inner casing ?xedly
ranged to'rotate in a direction opposite that of
saidl?rst mentioned rotors, a pair: of shafts jour
naled at their ends in-said casing and disposed“ '
mounted ‘within said casing, a sleeve rotatably
mainly therein, said shafts being coaxial'with
'mounted on said {inner casing forming an an 70 said rotors'on which one of said rotors of each
pair respectively rotate, means within said cas
nular chamber between thesame'and-said cas
ing, said inner casing having. a series of inlet
ing for connecting a rotor of each of-said pairs
ports thereinand said sleeve also having a se
ries of ports adapted to connect said inlet ports
with said respective shafts alternatelyso' that
said shafts may both be. driven in the samej’di
with said annular chamber upon rotation of said :75, rection or‘ may both be driven. in the opposite’
' 2,404,229
direction and means for delivering ?uid under
pressure to said rotors.
9. The structure set forth in claim 8, a casing
extending about said ?rst mentioned casing and
forming a liquid containing chamber from which
said ?uid is supplied to said rotors and means for
ing, one pair of said rotors having means there
on constructed and arranged to be rotated by
fluid in one direction and the other pair having
means thereon constructed and arranged to be ‘
by-passing the liquid through said chamber with
rotated by ?uid in the opposite direction, a pair
of shafts journaled at, their end portions in said
casing coaxial with said rotors, one of the rotors
out operating said rotors.
of each pair being rotatable on one of said shafts
and the other rotors of eachgpair being rotatable
10 on the other shaft, means within‘said casing for
connecting one of the rotors of each pair to said
ing having means thereon adapted to be engaged
shafts respectively and means for supplying liq
‘by ?uid for driving said rotors, means for admit
uid under pressure to said rotors to rotate either
ting ?uid under pressure to said casing to drive
pair of said rotors, the other pair being idle.
one of said rotors in one direction without driv
14. A ?uid transmission device havingin com
ing the other rotor or for driving said other
bination, a casing, a pair of ?uid-driven rotors
rotor in the opposite direction and not driving
in said casing each rotor comprising a plurality
said ?rst mentioned rotor, a shaft journaled at its
of circumferentially spaces oscillatable vanes,
ends in said casing at the center of and coaxial
said casing having a plurality of circumferen
with said rotors and on which said rotors revolve
10. A ?uid transmission device having in com
bination, a casing, a pair of rotors in said cas
and means for connecting either of said rotors 20 tially spaced ports spaced thereabout for direct
to said shaft.
11. A ?uid transmission device having in com
bination, a casing, a pair of rotors in said casing
adapted to be rotated by liquid under pressure, a
ing liquid to said rotors, a shaft supported adja
cent its ends in said casing about which said
rotors rotate, means for supplying ?uid under '
pressure to said rotors through said ports to
second casing surrounding said casing and form- <~Y rotate‘ either of said rotors, the other rotor be
ing idle, said means operating to supply said fluid
ing a chamber thereabout for containing liquid
to rotate said rotors in opposite directions re
under pressure, means for admitting liquid from
spectively and means for connecting either of
said chamber into said ?rst mentioned casing for
said rotors to said shaft.
rotating said rotors in one direction, a second pair
15. A ?uid transmission device havingv in com
of rotors in said ?rst mentioned casing, means 30
bination, a casing, a pair of fluid-driven rotors
for admitting liquid from said chamber to said
in said casing, means for delivering ?uid under
?rst mentioned. casing for rotating said‘second‘
pressure to said rotors said casing having a plu
pair of rotors in the opposite direction,’ a pair
rality of circumferentially spaced ports there
of shafts in said casing coaxial with said rotors,
about for admitting ?uid to said rotors, a sleeve
one of the rotors of each of said pairs rotat
?tting about and oscillatable about said cas
ing about one of said shafts and the other rotor
ing, said sleeve having a plurality of circum
of each pair rotating about the other shaft and
means for connecting one of the rotors in each
of said pairs to its respective shaft.
ferentially spaced ports therethrough adapted
to be brought into and out of register with said
ports .in said casing, certain of said ports and
12. A fluid transmission device having in com
. one of said rotors being arranged so that said \~
bination, a casing, a second casing extending
rotor is driven in one direction with the other 7 _
about said casing and forming a chamber for
rotor idle and certain of said ports and. the other
containing liquid under pressure, means for de
rotor being’constructed and arranged so that said
livering ?uid under pressure to said chamber, a
other rotor'is driven in the opposite direction with
rotor in said ?rst mentionedcasing having means
said one rotor idle, a shaft in said casing about
thereon adapted to be rotated in one direction
- which said rotors rotate, and means for connect
by ?uid to drive said rotor in said direction, a
ing either of said rotors to said shaft.
second rotor in said ?rst mentioned casing hav
16. A transmission unit having in combina
ing means thereon arranged to be rotated in an
opposite direction by ?uid to drive said second 50 tion, a casing, a pair of coaxial rotors therein
spaced longitudinally along'their common axis,
rotor in said opposite direction, a shaft in said
casing coaxial with said rotors and about which ' each comprising a, plurality of circumferentially ~
spaced oscillating vanes, means for selectively
said rotors revolve, means for selectively and con
supplying ?uid to said casing and rotors alter
trollably admitting liquid under pressure from
said chamber to said ?rst mentioned casing to 55 nately at circumferentially spaced points about
said casing to drive said rotors in opposite di
rotate either of said rotors, the other rotor be
rections, a shaft journalled adjacent its ends in
ing idle and means within said ?rst mentioned
said casing on which said rotors revolve and
casing for connecting either of said rotors to
means for connecting either of said rotors to
said shaft.
said shaft.
13. A ?uid transmission device having in com
bination, a casing, two pairs of rotors in said cas .60
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