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SeptrIO, 1946.. .
' 2,407,496‘
Filed June 28, 1945
2 Sheets-Sheet 1'
Sept. 10,1946.
2,4o7,49e .
F‘iled June 28, 1943
2 Sheets-Sheet 2_
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4/43 44
“E 46
Patented Sept. 10, 1946
‘Joseph Jandasek, Highland Park, Mich., assignor
to Bendix Aviation Corporation, South Bend,
Ind., a corporation of Delaware
Application June 28, 1943, Serial No. 492,537
7 Claims‘. (CI. 60-54)
This invention relates to transmissions and
more particularly to ?uid transmissions wherein
circulation of the power transmitting ?uid is ef
fective to cool the ?uid.
Heretofore in the ?uid transmission art con
siderable di?iculty has been encountered because
of excessive heating of the power transmitting
?uid. Radiators and other external cooling
means have been provided in an effort to main-v
tain the ?uid at a desired temperature; These
attempts have fora large part been unsatisfac
tory because of complications resulting from the
positioning of the necessary cooling means, and
the fact that considerable loss of ef?ciency re
ing to substantially close the space between th
heat radiating chamber and the interior of the
housing to provide a cooling space between a
smooth surface on the inside and a corrugated
> cooling surface on the outside.
Other objects and advantages of this‘ invention
will be apparent from the following detailed de
scription considered in connection with the ac
companying drawings, submitted for purposes of
illustration only, and not intended to de?ne the
scope of the invention, reference being had for
that purpose to the subjoined claims. '
In the drawings wherein similar reference char
acters refer to similar parts throughout the sev
sults from directing the power transmitting ?uid 15. eral views:
Fig. 1 is a longitudinal sectional View of a ?uid
through the radiator or other cooling medium.
transmission embodying the present invention.
An object of this invention is therefore to pro
Fig. 2 is a sectional View taken substantially on
vide a fluid transmission wherein circulation of
the line 2--2 of Fig. 1 looking in the direction of
the power'transmitting ?uid is effective to sub
ject the, ?uid to cooling action under conditions 20 the arrows.
Fig. 3 is a sectional view taken substantially on
whereby minimum loss of ef?ciency is encoun
the line 3-3 of Fig. 2 looking in the direction of
the arrows. _
A further object of the invention resides in the
Fig. 4 is a view similar to Fig. 2 showing a mod
provision of a ?uid transmission having spaced
cooling chambers so positioned that circulation 25 i?ed form of the invention.
Fig. 5 is a sectional view taken substantially on
of the power transmitting ?uidinduces it to ?ow
the line 5—-5 of Fig. 4 looking in the direction of
through the cooling chambers.
the arrows.
Another object of the invention is to provide a
Fig. 6 is a sectional view similar to Fig. 4 show
?uid transmission having rotatable impeller or
turbine members provided with external cooling 30 ing a still further modi?ed form of the invention,
Fig. 7 is a sectional view taken substantially
chambers to receive a portion of the ?uid as it
on the line 'l--—‘! of Fig. 6 looking in the direction
circulates ‘to subject the ?uid to a cooling action.
' Another object is to provide a ?uid transmis
sion having rotatable impeller or turbine mem-"
of the arrows.
?g. 8 is a' sectional view showing a still further
bers made of light weight. corrugated members
modified form of cooling arrangement.
connected to ?uid de?ecting vanes v‘to provide a
Fig. 9 is a fragmentary sectional View showing
the application of the cooling feature to a turbine
light but strong ?uid energizingror'energy ab
sorbing member wherein circulation of the power
transmitting ?uid induces a ?ow of ?uid through
the spaces provided by the corrugated members to
subject the ?uid to acooling action.
Still a further object of the invention resides
in the provision of cooling chambers for relatively
movable members whereby circulation ,of the
. '
Before explaining in detail the present inven
tion it is to beunderstoodv that the invention is
not limited in its application to the details of con
struction and arrangement of parts illustrated in
the accompanying drawings, since the invention
is capable of other embodiments and of being
power transmitting ?uid induces a ?ow of ?uid 45 practiced or carried out in various ways. ' Also
it is to be understood that the phraseology or
through the cooling chambers.
terminology employed herein is for the purpose
Still a further object is to provide means asso
of description andnot of limitation. '
ciated with a ?uid transmission housing whereby
Referring now to Fig. 1, it will be observed that
a portion of the power transmitting ?uid maybe
progressively passed through av heat radiating 50 a driving shaft H! has secured thereto a housing
I2 having thereon a starter ring gear I4 and a
chamber associated with'the housing.
?ange H5. _The ?ange I6 is adapted to receive a
Still another object resides in the provision of
radially extended cover plate I8 having a ?ange
a transmission housing having heat radiating pro
jections adapted to receive spaced vanes posi
tioned to lie adjacent the inner wall of the hous
20 adapted to be detachably connected to th
55 ?ange I6 by suitable bolts 22.
The radially extended portion of the housing
I2 is provided with a plurality of preferably cir
cumferentially extended corrugations 24 whereby
the atmosphere whereupon rapid dissipation of
30 are contoured as illustrated in Fig. l to pro—
in an ef?cient manner to provide the desired de
heat may be effected.
It will be apparent that if desired, cooling ?ns
may be applied to the corrugations 24 or to the
liquid cooling chambers 26 may be formed be
tween'the corrugations 24 and radially extended GI surface of the impeller housing to increase the
?anges 28 carried by impeller blades 39 providing
heat dissipating characteristics of the device.
an‘ impeller channel. A plurality of spaced
The cooling chambers 26 need not be concentri
apertures 29 in the ?anges 28 may be provided
cally formed, but may be of any desired con?gu
to admit circulating liquid into the cooling
ration or shape.
chambers 26.
The embodiment of the invention illustrated in
Figs. 4 and 5 is similar in many respects to that
A driven shaft 32 coaxially aligned with the
illustrated in Figs. 1 to 3. It will be noted that
driving shaft Ill has thereon a turbine hub 34
the ?anges 28 of the impeller vanes 33 are short
secured against relative rotation by splines 36.
ened to provide a space 33 between successive
The turbine hub 34 carries a turbine web 33 which
supports a turbine shroud 43 through suitable 15 impeller vanes whereupon power transmitting
second 'stage turbine vanes 4.2. The turbine
?uid may readily ?ow into the cooling chambers
shroud 43 is provided with ?rst stage turbine
25. If desired. auxiliary ?uid outlet passages 35
vanes 44 aligned with the impeller channel de
through the ?anges 28 may be provided to in
?ned by the impeller blades 3!).
crease the outlet area above the inlet area to in
Interposed between the ?rst stage turbine vanes 20 sure more rapid and positive dissipation of the
44 and the second stage turbine vanes 42 is an
power transmitting ?uid from the cooling cham
axially movable guide wheel member 45 carried
bers under the in?uence of centrifugal force and
by a guide wheel web 43 suitably mounted on a
suction exerted by the ?uid ?owing radially in the
guide wheel hub 58 having internal ‘helical
power transmitting ?uid circuit over the ?anges
threads 52 cooperating with external helical 25 28 of the impeller vanes.
threads 54 carried by a sleeve 56.
The embodiment illustrated in Figs. 6 and 7
One-way brake means 58 may be interposed
is generally similar to that discussed in connection
between the sleeve 56 and a stationary member
with Figs. 4 and 5. It will be noted that aux
60 to prevent backward rotation of the guide
iliary inlet and outlet passages 3‘! and 39 are
wheel 46 on the sleeve 56 when the device is 30 provided to permit a more rapid introduction of
operating as a torque converter at which time the
the power transmitting ?uid into the cooling
channel 62 is positioned in the power transmit
chambers 26 and to expel it more rapidly there
ting ?uid circuit between the ?rst stage turbine
44 and the second stage turbine 42.
In connection with the embodiments of Figs. 4
One-way driving means 66 interposed between
to '7 it will be noted that the ?anges 2B of the
the sleeve 56 and an axially extended ?ange 68
impeller blades 30 need not accurately align with
carried by the turbine hub 34 may be provided
each other since a free space is provided between
to prevent the guide wheel 46 from rotating freely
successively spaced blades. Greater manufactur
in the forward direction in the power transmit
ing tolerances are thus insured whereupon the
ting ?uid circuit when the ‘guide wheel 45 is
device may be manufactured more easily.
shifted axially to position a channel 18 in the
In the embodiment illustrated in Fig. 8 it will
power transmitting ?uid circuit between the ?rst
be noted that the housing I2 is provided with cor
stage turbine 44 and the second stage turbine 42.
rugations of varying degree whereby cooling
In this position the circulating ?uid impinges
chambers 3'! extending over considerably greater
upon the vanes in channel 19 thereby transfer
F radial length are provided to permit the ?uid to
ring energy through the web 48, guide wheel hub
?ow a greater radial distance as it passes through
50, sleeve 56, one-way driving means 55, ?ange
the cooling chambers. These corrugations may
68, to the driven shaft 32.
take any desired form and any suitable inlet and
Referring now to Figs. 2 and 3 it will be ob
outlet means may be provided to assure the de
served that the ?anges 28 of the impeller blades
sired ?ow of ?uid through the cooling chambers
vide the desired inner surface of the power trans
mitting ?uid circuit. It will be noted that a
plurality of spaced cooling chambers 26 are
formed by the concentric corrugations 24 of the
gree of cooling with minimum ?uid turbulence.
Fig. 9 illustrates the application of the cooling
feature to the ?rst section turbine member 44.
. It will be noted that the housing I2 is provided
with corrugations 4| to provide a cooling chamber
Each cooling chamber 213' is provided with
spaced inlet and outlet openings 29—A and iii-B
respectively whereby a portion of the power trans
43 between a turbine shroud 45 and the casing l2
whereby a portion of the power transmitting ?uid
may ?ow through the corrugations 43 and be
mitting ?uid ?owing radially outwardly in the'di 60 returned to the power transmitting ?uid circuit
at any desired point such for example as adja
rection of the arrow 3| ?ows into successive cool
cent the guide wheel channel 46.
ing chambers 26 through the inlet openings 29-A
This type of construction may be employed in
and is again introduced into the power transmit
any location where a ?uid energizing or energy
ting ?uid circuit through the outlet openings
absorbing member rotates at a different speed
than a juxtaposed member. It will be apparent
In the operation of this device a portion of
that cooling ?ns 41 may be provided to accelerate
the ?uid is constantly introduced into and ex
the dissipation of heat from the relatively mov
pelled from the cooling chambers 26, and the
cooled ?uid is re-introduced into the ?uid circuit
to mix with the uncooled fluid and prevent the
temperature of the power transmitting ?uid from
able members.
This is a continuation in part of my copending
application, Serial No. 387,462, ?led April 8, 1941,
now Patent Number 2,363,731, issued November
rising beyond a desired temperature. The exter
28, 1944.
nal surface of the impeller housing being corru
I claim:
gated provides a large surface area in contact with 75
1. In a ?uid‘ transmission, a corrugated housing,
a power transmitting ?uid circuit in the housing
5. In a ?uid power transmitting device, a hous
ed housing multiple cooling chambers communi
ing having a generally radially extending outer
wall, spaced vanes positioned in the housing, and
liquid cooling chambers interposed between the
cating with the ?uid circuit.
2. A ?uid transmission comprising a corrugat
ed housing, ?uid de?ecting blades carried there
by 'and de?ning therebetween cooling chambers.
transmitting ?uid circuit including a plurality of
and?uid de?ecting blades in the circuit having
?anges de?ning in conjunction with the corrugat
3._In a ?uid transmission, a. housing, a power
transmitting ?uid circuit therein, a plurality of
blades in the ?uid circuit, said blades de?ning in
conjunction with the housing multiple cooling
outer wall and the spaced vanes.
6. In a ?uid transmission, a housing having
concentrically arranged corrugations, a power
liquid de?ecting vanes providing relatively smooth
internal surfaces, and liquid cooling chambers be
tween said corrugations and internal surfaces
having communication with the power transmit
chambers communicating with the power trans
mitting ?uid circuit.
ting ?uid circuit between the vanes.
7. In a ?uid transmission, a housing having
transmitting ?uid circuit in the housing, ?uid en
positioned in the housing having ?anges welded
to the corrugations whereby liquid cooling cham
concentrically disposed corrugations, spaced vanes
'4. In a ?uid transmission, a housing, av power 15
ergizing blades in the circuit having ?anges de
bers are formed between the corrugations and
?ning in conjunction with the housing multiple
?uid, cooling chambers, the blade ?anges being
spaced apart to provide inter-communication be
tween the cooling chambers and the ?uid circuit?
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