Патент USA US2604117

July 22, 1952
T. T. TUTTLE
2,604,109
SPEED CONTROL VALVE UNIT
Filed March 14, 1947
2 SHEETS-SEAT l
July 22, 1952
2,604,109
T. T. TUTTLE
SPEED CONTROL VALVE UNIT
2 SHEETS—-SHEET 2
Filed March 14, 1947
,_, .
jl'rve/rfor
1/0/70/7 Z.’ Ta ff/e
Patented July 22, 1952
2,604,109
STATES PATENT
7 2,604,109 '
-" "SPEED CONTROL VALVE UNIT,
Tilmon T. Tuttle, Dayton, Ohio ’
Application March 14, 1947, S_eriaINo.734,614
2- Claims. ((31. 137-115)’
2
This: invention relates'to a speed control valve
unit, and more ‘p‘articularl-y‘to such a unit as
applicable to motor vehicles.
supply pipe" [6.‘ A discharge pipe l‘lleads from
‘ the pump to'a speed control valve. I8 to be'rnore
fully described hereinafter. From the valve IB'
Y‘ A primary objectof this’ invention is the pro
a return line [9 leads to a ?lter 20, iron; which
vision of an improved‘ valve unit for a-hydrau 5 a pipe 2i returnsy?uid to the reservoir ‘pl-5‘.
lie-drive‘ system adapted to» reduce the loss‘ of
The valve 18 isalso provided with an operat
power between the engine 'and'the driving de
vice for‘the wheels of_ avehicle. ‘v
ing connection 22’ ‘that leads to a reverse valve
23- of the slide valve type. From the reverse"
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‘A further object ofv the invention isv the pro
valve 213 an’ operating connection zd‘lea'ds
a
vision of such a valve unit which accomplishes» 10 T 25‘ from which a pipe 26 leads. through a
the‘foreg'oing objects by the elimination of the
conventional; _~ clutch, transmission, universal,
drive ‘shaft, and differential;
T 27 to a transverse pipe '28, which in turn is
connected‘, at its‘ opposite ends, with hydraulic
driving “motors, 29 associated with ‘ the" rear
" A5-fui-‘ther'objeet of the invention isthe pro
Wheels
vision‘ of: an ‘improved speed control valve for the
vehicle?v so arranged and constructed‘ as‘ to per
mit the engine-to run at av constant speed, and,
by control of the quantity‘ of- the fluid admitted
to' the drive motors-associated with the wheels
o?avehicla-to control theispeed- thereof.
1 An ‘additional object of the invention is the
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ou't-liereinafterand disclosed in the‘ accompany
ing drawings, wherein there is shown a'pref'err'ed
embodifmcntlof this inventive concept.
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p
with the motor units" 29} ,for op’erativélyfdrivin'g'
.20 the motors in the reverse direction. The'inotor
of'c'onstruction,allv as: will. be more‘fully pointed
drawingsz-
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T 3|‘ to a pipe 32" connected by a T 33‘ with a
of elements, arrangements oflip'ar'ts, and features
InJthe'
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transverse pipe 334, which also‘coinmunicates
Still; ‘other objects reside in the combinations
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reverse connection -3ll~whi'chextends through a
provision of ‘a control valve unit for hydraulic
drive systems which is sturdy and durable in
c'onstruction,-= reliable and'cf?cient in‘; operation,
and relatively simplev and inexpensive to manu
fa'cture, assemble'and-install; -
[2;
The reverse valve 231s alsoqprovided with a
units ,219 are also; provided with" return, drain‘,
or seepage‘ connections; 35 [which connect
thr‘éugha T 36, a Pipe '31,. a; r at, a: pipe‘ 39'.‘
and a T‘ d?frto- the“ ?lter 20- and'?uid reservoir
'- I15.‘
The T 40 also communicates‘ with‘ the re
turnline i9‘ and the T: 33
connected through‘
a pipe 4i to the return side- of’ the>va1ve“2"3".
' The T’YfsZETand-IM areconnectedthrough'rpip’es
4'5‘ and ‘it,v respectively,‘ back to- the control; valve
unit
l3.
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Means of ‘conventional type‘ are provided for:
directin'g'the' ?ow of ?uidirom- thereverse valve
23' through either pipes-2'41, 30 or“ 41, as‘may be‘
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fFigure-ilgis a ‘schematic, top plan'view ofia
desired, ‘ and take the" form of a pivotally
motorvehicle utilizing the valve unit-of the in 35 mounted“ lever 411 connected to" an operating rod‘
stant invention; the ‘body-land certain other
parts thereof being omitted? for thesake of'
clarity,
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Figure 2 is a‘ horizontalvsectio‘nail vew‘ taken
substantially through the center line of‘the‘ speed’
control valve of the system.
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Figure 3 is a fragmentary ‘sectional view‘show
ing a constructional detail.
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Figure ‘4' is a view‘ partially in elevation! and
partially in section‘ disclosing alfurthercons'truc—
tioanal
detail.
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\‘Having reference nowl'ito the drawings, and
more particularly to"'Figure'-h1', there is- gen
erally indicatedv at VIO-‘th‘e- frame of a motor v'e»
hicle of any desiredi'conventional- type provided
with~~froht Wheels NH, rear wheels 12‘, and an
engine l3 of any desired-conventional‘ type. '
The engine IQ is directly'and? operatively con;
nected to a pumpillid whichi‘s supplied with hy-'
d'r’aulic- ?ui'dlfrom a reservoir vI15 through a main
48'movable by a control lever 49* which extends
into- the body- of the vehicle at a point adja'-'
’ cent the driver. The arrangementof this‘ unit
ispconventionail, and-may he of any desiredtype
o't- valve mechanism adapted for ‘the-direction: of
?uid‘ into one of‘ the pipesi-nenticned for a] p'ii'r-I
pose to be more fully described hereinafter-.7 I
Means are! also} provided vfor controlling the
valve unit 18 in-a mainnerltclbe described‘ in‘ do’:
tail hereinafter, and inc-lode‘ a} rotatable rodii?r
extending into the unit raian'd connected-at its
opposite end ‘to an eccentric- 5.! to‘ which is? so‘
cure'dT; asl'by'rn'ieans ofa pin‘ 52-; an operating rod
5351wl-iich extends'to anaccelerator'pedal 543su'it
ably mounted in“ the’vbod'y- of} the vehicle} \The‘
arrangement is? such‘, that movement 0; the‘ ac
celerator pedal 54‘ tends through'i'the‘ecce?tric
5'1. to'rotate memento-1
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ReferringT now“ inl-detail te thespeedi control
2,604,109
4
threaded cap I08 adapted threadedly to engage
in the outer extremity of the recess 6|.
From the foregoing the operation of the mecha
inlet pipe I1 from pump I4 communicates with
a passage I1a, which in turn enters a bore 60
which communicates with a recess 6| within
nism should now be readily understandable.
which is positioned a balanced spring-loaded
valve 62, the loading being effected by springs
In
operating the vehicle, the engine I3 may be
63 and 64 on opposite sides thereof. An outlet
started and adjusted to run at a desired R. P. M.
I9a communicates with recess 6| and has con- ,
at maximum e?iciency. When it is desired to
retain the vehicle in stationary position, the re
verse valve 23 may be adjusted to neutral posi
tion, and the accelerator 5.4 released to adjust
the parts to the position disclosed in Figure 2.
Under these conditions, it will be seen that the
pressure of ?uid in the inlet I1a is su?‘icient to
nected thereto the outlet pipe I9.
The other end of the bore 60 communicates
with a recessw65, the upper extremity of which
is provided with a valve seat 66 against which is
adapted to seat a valve 61. A second valve mem
ber 68 connected to the valve 61, as by means of
bias the valve 62 to open position, since the load
a valve stem 69, seals recess 65 against the pas
sage of ?uid therethrough, and is provided at its 15 ing of'the spring 83 is in excess of that of the
spring 63, and, the valve 61 being ?rmly seated
lower extremity with a bracket 10, which carries‘
against its seat 66, ?uid from the pump I4 will
a rotatable wheel 1|. The wheel 1| is adapted
pass through the inlet I1a, the bore 60, into the
to abut an eccentric 12 carried by the shaft 50
recess 6 I, and thence outwardly through the out
which extends into a bore 13 in the unit I8; The
rod 50 is provided interiorly of the bore 13 with av 20 let I9a to pipe I9, returning through ?lter 2| to
reservoir I5. Correspondingly, due to the ab
cylindrical guidemember'14, and, adjacent the
sence of ?uid pressure in the bore 81, the spring
outer-extremity of the bore with sealing rings 15.
9I will bias the valve 94 to open position, in such‘
A suitable ?tting 16 secured‘ to the exterior of
manner that ?uid from the driving motors 29 is
the unit I8, as by screws 11, holds the parts in
related assembly.
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The valve member 61 has secured thereto a
second valve 80 moving in a. recess 8| and pro
vided with a spring-seating pin 82, surrounding
which is one end‘of a coil spring 83, positioned
in outlet passageway 22a which communicates
with main outlet pipe 22. A
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The opposite end of the spring 83 seats against
a threaded spring-retaining collar 85 suitably
threaded within the passageway 22a and provided
with a central aperture 86.
,A bore 81 extends from the recess 8| to a trans
versebore 88 which in‘turn communicates with
a bore 89 parallel to the: bore 81 which connects
two parallel bores 45a and 46a, connected to .the
circulatory pipes; 45 and 46, respectively. A cen-r
permitted to circulate through pipes 45 and 46
into the passageways 45aand 46a, thus preclud
ing blocking of the wheels and their associated
motors 29, whereby coasting may be achieved.
When it is desired to apply power to the rear
wheels I2 of the vehicle, pressure on the accelera
tor 54 will rotate the rod 50, which, through its
eccentric 12, will open valve 61, the lower end of
recess 65 being sealed by the valve 68, and admit
?uid from the bore 60 into the recess 8|, and'cor
35 respondingly, into the bore 81. Fluid- pressure
of the bore 81 will cause valve member 91 to move
outwardly closing the bore, 89 and precluding free
circulation of ?uid in the pipes 26, 38, 32, 34, 45
and 46-. Correspondingly, as- the valve 80 is
moved out of the recess 8|, to open communica-.
tion therewith with main outlet 22a, ?uid passes
tralpartition between the passageways or bores
through the bores I 02 and I04 and the apertures
45a and 46a contains a bore 90 within which 'is
I66 and, threaded cap member I08 into the bore
positioned a spring 9| surroundingla spring guide
60 on the side containing the :spring 64, thus
rod and stop 92 adapted to be engaged by a pin
93‘c‘arried by a valve member94. Member 94 is 45 equalizing the pressure on opposite sides of the
valve 62, and centering the‘ same to close the out
provided with a sealing ring 95 adapted toi-pre
let passage I9a. Under such conditions, and
vent the passage of ?uid into thebore90,pand
assuming that the reverse valve 23 is still in neu
is connected, as by means of a reduced stem 96,
tra1 position, the ?uid circulates into therreverse
to'a second valve member 91 provided with a seal
ing ring 98,'and a stop pin 99, the valve portion 50. mechanism 23 through the pipes 4| and 39, hence
through T40 to- the ?lter 20 and back to the,
91 beingv adapted to seat in the bore 88. It will
reservoir I5. Under isuchconditions, it will be
be understood that ?uid pressure in the passage
readily seen that a braking effect is applied to
way 81 will force the valve 91, and hence the valve
the rear wheels, since, by virtue of the closure
94, outwardly with respect to the passage 81 to
close the, passageway 89, the movement of the 55 of the bore 89, circulation of the ?uid through
the motors 29 is precluded, and the fluid exercises
parts being ‘limited by the abutment of the pin
93 against the rod 92, and that such movement , a material braking effect;
However, when it is desired to move the vehicle
will effectively close the'passageway 89.
,Bores 81 and 89, respectively, are closed-ploy‘, forwardly, the lever 49 is shifted in such manner
threaded caps I00 and |0I to seal the :ends 60 as to close oif the pipe 4|, and permit ?uid to
pass outwardly through the pipe 24 to'the T 25,
thereof, the bores being machined from the side
and thence through pipe 26 and T 21 to pipes 28
wall of the unit I8.
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to energize the driving motors 29 which in turn
.A bore I02 extends from the main outlet22a
rotate the wheels I2. After driving the motors
outwardly through the wall of the member I8,‘
its extremity being closed by a threaded cap 'I 03,v 65 29, the ?uid then returns through the return 35
and T 36, pipe 31 and T 38, through pipe 39 back
and intersects a transverse bore I 04, its outer
to the ?lter 20, and thence to the reservoir I5.
end being closed by a screwcap I05, which com
Reverse driving movement is effected by mov
municates with the recess 6| on the adjacent
ing the reverse valve inrsuch manner as to close
side of the balance valve 62. Suitable apertures
I06 permit the passage of ?uid from the bore I04 70 off the pipes 24 and 4| and pass ?uidthrough
the pipe 30 and T 3| to .pipe 32, and thence
into the portion of the recess 6| on‘ the adjacent
through 7T 33 to pipe, 34,, the ?uid from which,
side of valve 62 in order to balance the same in
entering the motors on the opposite side thereof
the manner and for a purpose to be more fully
causes a reverse rotation of the wheels I2. The
described hereinafter. As best shown in Figure
3, the spring 64 is seated in an aperture I01 in a 75 ?uid under these conditions returns through the
2,604,109
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return 35 in the manner previously described to
the reservoir 15.
It will now be seen that there is herein pro
vided an improved valve control mechanism’for
a ?uid drive system which is extremely flexible
in operation and of maximum e?iciency, the
speed of the driving motors 29 being governed by
the degree to which the valves 61 and 80 are
opened, the speed of the engine remaining sub
stantially constant at all times, which permits
forward and backward movement of the vehicle
at any desired rate of speed, which e?ects the
braking action when desired, and which further
6
ed in the third chamber and movablein response
to the opening of said small valve of said valve .
unit to close the circulating bore, a spring to
unseat the second plunger valve, and manually
operated means to operate the valve unit for un
seating the small and large valves.
2. A valve device for use with ?uid transmis
sion for vehicles, comprising a body portion
having a ?rst chamber of uniform diameter, a
second chamber having large and small cham
ber sections leading into each other, a ?rst com
municating bore leading into one end of the ?rst
chamber and into the small chamber section, a
main inlet bore communicating with one end of
permits coasting or idling of the motor without
changing the R. P. M. thereof.
15 the ?rst chamber, a main outlet bore leading into
It will also be seen that there is herein pro
‘vided a device which accomplishes all the objects
of this invention, and others, including many ad
vantages of great practical utility and commer
the side of the ?rst chamber, a main discharge
bore leading into the large chamber section, a
second communicating bore leading into the
main discharge bore and the ?rst chamber near
cial importance.
20 its opposite end, a third chamber, a circulating
As various embodiments may be made of this
bore having a part thereof leading into the third
invé'ntive concept, and as various modi?cations
chamber, a third communicating bore connect
may be made in the embodiment hereinbefore
ing the large chamber section and the third
shown and described, it is to be understood that
chamber, a ?rst plunger valve in the ?rst cham
all matter herein is to be interpreted merely as 25 ber to cover and uncover the main outlet bore,
illustrative and not in a limiting sense.
spring means engaging the ?rst plunger valve to
I claim:
cause the same to cover. the main outlet bore
1. A valve device for use with ?uid transmis
when the pressure is balanced upon opposite ends
sion for vehicles, comprising a body portion hav
of the plunger valve, a valve unit mounted within
ing a ?rst chamber of uniform diameter, a sec 30 the second chamber and including a small valve
ond chamber having large and small chamber
for closing the small chamber section and a large
sections leading into each other, a ?rst com
plunger valve between said ?rst and second com
municating bore leading into one end of the ?rst
municating bores for closing the large chamber
chamber and into the small chamber section, a
section, the large plunger valve unseating after
main inlet bore communicating‘ with one end of 35 the small valve unseats, a spring to seat the small
the ?rst chamber, a main outlet bore leading into
valveand large plunger valve of the valve unit
the side of the ?rst chamber, a main discharge
and being stronger than the spring means, a sec
bore leading into the large chamber section, a
ond plunger valve mounted in the third cham
second communicating bore leadingv into the
ber and movable in response to the opening of
main discharge bore and the ?rst chamber near (0 said small valve of said valve unit to close the
its opposite end, a third chamber, a circulating
circulating bore, a spring to unseat the second
bore having a part thereof leading into the third
plunger valve, and manually operated means to
chamber, a third communicating bore connect
operate the valve unit for unseating the small
ing the large chamber section and the third
valve and large plunger valve.
chamber, a ?rst plunger valve in the ?rst cham
TILMON T. TUTTLE.
ber to cover and uncover the main outlet bore,
REFERENCES CITED
spring means engaging the ?rst plunger valve to
cause the same to cover the main outlet bore
The following references are of record in the
when the pressure is balanced upon opposite ends
?le of this patent:
of the plunger valve, a valve unit mounted within 50
UNITED STATES PATENTS
the second chamber and including a small valve
Number
Name
Date
for closing the small chamber section and a large
527,575
Wood ____________ __ Oct. 16, 1894
valve between said ?rst and second communi
cating bores for closing the large chamber sec
1,008,202
Schmucker ________ __ Nov. '7, 1911
Killman __________ __ July 6, 1915
tion, a spring to seat the small valve and large 5 GR 1,145,317
1,912,060
Beattie __________ __ May 30, 1933
valve of the valve unit and being stronger than
2,221,308
Dischert _________ __ Nov. 12, 1940
the spring means, a second plunger valve mount