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Патент USA US2115244

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April 26, 1938.
B_ |-|_ SAVAGE
Filed Feb. 7, _l954
6. 20'
; .412 _
3 Sheets-Sheet l
565/4 ? 574/440:
April 26, 1938.
2,1 15,244‘
Filed Feb. 7, 1954
s SheetS-Sheet 2
April 26, 1938.
2,1 15,244
Filed Feb. 7, 1934
3 ‘Sheets-Sheet 3
2 52
Imventor ‘T
545/4 /7.’
3 Patented Apr. 276‘, 1938
* 2,115,244
Savage Research Corporation, San Diego,
Application February 7, 1934,
2 Claims.‘
No. ‘710,118
(01. lea-5s)
_My invention relates to hydraulic clutches, and
the objects of my invention are:
parts and portions throughout the several views
' of the drawings.
Casing I, cover .2, shaft 3, bearing 4, packing
First, to provide a hydraulic clutch which in
corporates automatic means for bypassing oil vgland 5, rotor 6, bearing 1, sliding vanes 8, springs
9, valve Ill, ?exible diaphragm ll, pin l2, collar
when the load on the clutch exceeds a predeter
mined amount so that the speed of the engine and l3, sleeve l4, set screws l5, levers‘ l6, weights l'l
the driving side of the clutch may be maintained vand spring l8 constitute the principal parts and
of my novel hydraulic clutch.
when the 'load on the driven side is increased, portions
thereby eliminating overloading of the engine as
integrally with a ?y wheel la adapted to be se-. 10
well as excessive pressure‘in the clutch mecha
cured in the conventional manner to the crank
shaft of an internal combustion engine. . The
Second, to provide a hydraulic clutch which is
rear side of thecasing I is provided with an ec
particularly compact of construction so that it centrically
disposed circular recess, designated _lb..
may bemounted between the engine and trans
recess lb and the forward side of
15 mission of a conventional vehicle;
, Third, to provide a hydraulic clutch which is so .the' ?y wheel portion there is providedv an eccen
arranged that it only partially engages when the trically mounted mass of material, designated lc,'
clutch pedal is released and complete engagement‘ which compensates for the eccentricity of the
is delayed until the speed of _ the driven side
20 reaches a predetermined amount‘;
Fourth, to provide a hydraulic clutch which in
corporates a sliding vane and eccentrically ar
ranged pumping chamber with centrally con
trolled bypasses from the high to the low ‘pres
sure side of the chamber so that control thereof
may be readily and quickly effected, and
Fifth, to provide on the whole a novelly con
structed hydraulic clutch mechanism which is
durable, e?icient in its action and-which will not
30 readily deteriorate or get out of order.
With'these and other objects in view as will
appear hereinafter, my invention consists of cer
recess lb so that the casingv'l may be ‘both
dynamically and statically balanced.
The forward side'of the casing [receives a
cover member 2 which is bolted to the casing by
its peripherialportion and forms a sealed con
nection therewith. The cover 2_ journalsa cen
trally disposed shaft 3 by means of a bearing 4. ’ 25
The shaft protrudes through a suitable packing
gland 5.
The shaft 3 is secured to a rotor 6' which is con
centric therewith and mounted in the recess lb.
The forward side of the rotor 6 is provided with 30
a stem Gd which is supported by a. bearing ‘l in
the casing I, as shown best in Fig. 1.
> The rotor 6 is provided with a plurality of.
tain novel features of construction, combination equally spaced radiating slots 6a each of which
and arrangement of parts and portions as will be receives a sliding vane 8. Coil springs 9 ?t into 35
35 hereinafter described in detail and particularly sockets provided in the bases of the slots 6a and
set forth in the appended claims, reference being extend into registering sockets provided-in the.
had to the accompanying drawings and to the vanes 8 so as to urge the vanes against the inner
characters of reference thereon which‘ form ‘a periphery of thegrecess lb. The rotor 6 is also
part of this application, in which:
provided with a plurality of diametricallyextend 40
Figure 1 is a longitudinal sectional view of the ’ ing passages 6b which intersect its periphery be
hydraulic clutch mechanism taken through l—-l tween the several vanes 8. The diametrically ex
of Fig. 6; Fig. 2 is a fragmentary‘ sectional view
passages 6b intersect a common recess 60
similar to Fig. 1 showing the parts in the position tending
assumed when the clutch is in engagement; Fig. extending forwardly from the rear side of the 45
3 is a transverse elevational view taken along the rotor.
The shaft 3 is provided with a bore there
line 3-3 of Fig. 1 with the 'cover plate of the through
is enlarged at its forward end as
clutch housing and the stub shaft extending indicatedwhich
by 30.. The enlarged portion 3a receives
from the rotor removed together with the valve
a valve head Illa. of a’valve member ID. Said
mechanism and with parts and portions broken valve
member includes a valve stem lob which 50
50- away and in section to facilitate the illustration; extends into the constricted portion of the bore;
Fig. 4 is a transverse sectional view through |—4 designated 3b. Between the portions 30. and 3b
of Fig. 2 illustrating the stub shaft and ?exible. of the bore said bore is internallyxthreaded to
partition; Fig. 5 is a transverse sectional view receive one end of a ?exible diaphragm‘l l, the re
through 5-5 of Fig. 1; Fi'gr? is a transverse‘ maining end of which is secured to the valve head 55
55 sectional'view through 6-6 of Fig. 1; Fig. 7 is a llla. Said ?exible diaphragm is formed of sheet
fragmentary sectional view through '|—‘l of Fig. metal with a. series of annular corrugations
3; Fig. 8 is a fragmentary sectional view through
8-8 of Fig. 3, and Fig. 9 is a perspective view of pressed therein so that the diaphragm is capable
of contraction and expansion and serves to pre-_:
one of the vanes.
Similar characters of reference refer .to similar , vent leakage between the valve l0 and shaft 3
and also serves to unseat'the valve I0 sufficiently
,to permit the oil to force the valve open. The
_ valve head Illa is adapted to ?t into the recess 60
which forms a valve seat therefor.
The rear end of the valve stem IIlb receives a
transversely extending pin l2 which projects
diametrically through slots 30 formed in the shaft
3. 'The extremities of the pin I2 ?t in an an
nular channel I3a provided in a collar I3 which
10' surrounds the shaft 3, as shown in Figs. 1, 2
and 5.
oil through the passages 6b,'whereupon the shaft
3 is caused to rotate. As the speed of the shaft 3
increases the weights I ‘I are thrown outwardly
by centrifugal force causing the lugs I6a to press '
forwardly on the collar I3 and further close the
valve until at a predetermined speed of the shaft
3 the valve I0 is completely closed'and the clutch
is “engaged”; that is, the passages 61) are com
pletely shut off and the rotor 6 is secured against
movement relative to the casing I.
It will be here noted that with the above con
The shaft 3 supports a sleeve I4 rearwardly of ‘ struction and operation that in case of heavy
the collar I3. Said sleeve is limited in its axial loading or extreme pressure in the clutch mecha
' movement by means of set screws I5 which ex
nism, the shaft 3 will be slowed down causing
15 tend into channels 3d‘provided in the shaft 3. the
weight I‘! to move inwardly toward the shaft
Said sleeve I4 is provided with an annular chan
which will release the member I3 to the extent
nel I4a adapted to receive a yoke or other con
ventionalmeans connected with a clutch pedal,
not shown. Theforwardjend of the sleeve I4 is
20 provided with a plurality of equally, spaced brack
et portions I 4b which are adapted to journal
levers I6. Said levers normally extend outwardly
and forwardly and terminate in weight portions
The. remaining legs of the several levers I6
‘p 25 extend radially inwardly into slots provided in the
' sleeve I4 and form 'cams or lugs IIia adapted to
- bear against the rear side of the collar I3, as
shown in Figs. 1 and 2. The sleeve I4 tends to
move to its forward position by the action of a
30 suitable spring I8.
,The cover 2 is provided with a recess 2a sur
rounding the shaft 3 and adjacent the rotor 6.
A similar recess Id is centered in the recess Ib
and is located between the rotor and-its bearing
35 1.
The recesses 2a and Id are intersected by
radially extending channels 22) and le, respec
tively. 1 These channels extend to the low side
of the rotor.
Also the side walls of the rotor in
wardly from its peripherial portion are relieved.
40 Further the rotor is provided with a small passage
leading from the valve seat 60 to the extremity of
the boss 6d and other small ports or passages
of said slow down permitting the oil pressure to _
get behind the valve and move it open su?iciently
to eliminate the overloading of, the engine as well '
as excessive pressure in the clutch mechanism.
It will be noted that there is provided slight 20
clearance between the rotor 6 and the casing I
at the tangent portion to permit a fluid flow and
prevent the fluid‘being trapped between the vane
8 and the point of tangency of the rotor and
Though I have shown and described a particu
lar construction, combination and arrangement
of parts and portions, I dov not wish to be limited
to this particular construction, combination and '
arrangement, but desire‘to include in the scope 30
of myinvention the construction, combination
and arrangement substantially as set forth in the
appended claims,
I ,
Having thus. described my invention, what I
claim as new and desire to secure by Letters 35
Patent is:
1. In a hydraulic clutch, a statically and dy
namically balanced ?y wheel structure having an
eccentrically disposed casing portion, a. rotor dis
posed concentrically with respect to the ?ywheel 40
structure and ‘mounted in the casing portion
leading to the shoulder adjacent the bearing sup [forming therewith a pump chamber, a plurality
port portion of said boss. Any oil that drains of vanes dividing said pump chamber into come
into the recess Id or the recess 2a is withdrawn partments, ?uid passages connecting said com-'
through the channels I'e and 2b byreason of the partments to permit passage of ?uid into and out
fact that the pressure in the low side of the rotor of said compartments to permit relative move
is less. By the “lowhside”. is meant the side in ment of the rotor ‘and fly wheel structure, valve .
which the chamber formed between the rotor, means for controlling said passages, and a cen- ,
the recess Ib and vanes 8 isv enlarging as the trifugally responsive means for operating said
rotor turns.
The pressure side of each vane 8 is provided
with one or more longitudinally extending chan
nels 8a which allow oil to pass into and out of the
spaces formed between the inner ends of these
vanes and the slots 6a. During rotation the
pressure of the oil in these spaces aids in holding
the vanes against the inner periphery of the
recess Ib.
Operation of the hydraulic clutch is as follows:
When the valve II] is withdrawn from the valve
seat 60 the clutch is in its neutral position which
‘is the position shown in Fig. 1. Wheni the clutch
is in its neutral position the oil which completely
‘ 50
2. In a hydraulic clutch, a casing means, a rotor '
valve means.
mounted therein, said rotor and casing means
being relatively eccentric and forming therebe
tween a ?uid chamber, radiating sliding vanes
carried by said rotor and engaging the periphery 55
of said casing to divide said chamber into a'plu
rality of compartments, said rotor having pas
sages radiating from, a common center to each
compartment and a valve seat at the' center or
juncture of said passages for simultaneously con
trolling the same, a hollow shaft extending from ’
said rotor through said“ casing, a valve mounted
in said shaft and adapted to engage said seat for
65 ?lls the base between the rotor and ‘its casing, the ' controlling said passages to seal said compart
_ various ‘ passages and rec‘esses communicating
one from the other, and means for op-' 65
therewith, is free to surge back and forth through .ments
said valve, said means comprising a cen-‘
the passages 6b passing the recess or valveseat
responsive mechanism engagcablc with
portion Be. When the clutch pedal is released
in the usual mannervthe spring I8 moves the. said valve tending to close the same as the speed
70_ sleeve
I4 forwardly to its extreme position, as of the shaft increases-and a manually operated
shown by dotted lines in Fig. 1, thus partially device for shifting said mechanism bodily to effect 70
closing the valve 10 and restricting the ?ow of
partial closing of said valve.
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