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Dec. 6, “1949
J. K. TANK
AUTOMOBILE STABILIZER
2,490,719
Filed May 3, 1948
5 Shéets-Sheet 1
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Dec. 6, 1949'
J. k. TANK
2,490,719, ‘
AUTOMOBILE STAB ILIZER
Filed May 3, 1948
3 Sheets-Sheet 3
Patented Dec. 6, 1949
2,490,719
UNITE o STATES-j PATENT orF-isc E,
2,490,719.~
'
AUTOMOBIEE STABILIZERK
John K. Tank, Eureka, Galif:
1
Applic?tim’l May 3,1948,‘ Serial'N'o.‘ 24;!)02"
2~~Glaims. (Cl. 280-124)
My invention relates to an'automobile stabilizer
to:-.eliminate the Side sway. of a car when making.
aiturnlathigh speedand. especially on unbanked
selector‘ or distributor‘ valve ‘ for conveying the
pressurei?uid to opposite sides of a car.
Figure ?iisla'sectional elevation of a stabilizersv
curves or turns in highways. .
orllifting member between the axles and frame of I
An~object . of. the invention is ‘ to. provide means ; 5.; the car.
directly between the axles or springs adjacent the
axles. andthechassis. orframe of the car to re
sistside sway. orstilting oféthebodyof thecar in a
direction opposite to the: direction of turn which
tends‘to raise the. body'atv the inner. side of the
Figure 6 is 1a face-view-"ofthe'dialiof the pres
sure regulator applied‘ to the dash “of a - car.
Figure ‘7 "is ' a - section -' of! the pressure regulator
taken ‘on the-line- ‘ll-1 iof'iFi'gure ’ 6.‘
Fi'g-ure' 8 is-a horizontal section taken- on the
curve" and throw: the :weight. of the car and ‘body
line-8i-8lofYFigurel4."
toward the outside of .the curve-causing side sway.’
Figure=9iis a-sectional‘elevationtaken on the»
Anotherobject istoprovide a stabilizer which
line 9‘—-9"of Figure~‘4.'’
is_automatically rendered operative upon the act
Referring to thedrawings; the application-0f‘
of" turning the steering 'wheel'and gear to make a
turn and in proportion'tothe angle or degree of ' is'shown
the‘ stabilizer
in 'Figii-re'l,v
or‘ sway- in
eliminator
‘which 1 0-to
is the
an ‘automobile
frontv axle‘
the arc: of the turn of the car. upon a roadway.
and
II
the
rear
axle
'hOusingYand?
l
2'the
motor
A-further object is to-provide expansion sta
from-1 which, such'asthe fan shaft 13,“ aY-?uid com‘
bilizingi cylinders connected between the frame or:
pressor-orpump' I 411s driven,‘ the ?uid medium be»
chassis-of an automobile andthe’ axles thereof or"
springs I adjacent thereto ‘whereby ?uid . pressure“
is admitted toethe-cylinders at the outside of the.
tumor arc of the=curve and discharged from the
cylinders atthe-inside of the turn‘ of‘the vehicle,.
the. control-‘of the flow of the fluid under pressure_
being. effected bypaselector valve voperated from.‘
the steering gear dependingupon the direction
ofsturning the steering-wheel and direction of turn‘
of the carso that the fluid pressure and-resistance’
to sway of the car body-will vbe-automatically ef
fective at the .proper'side-ofthe car, while means
in the form ofa pressure regulator operated'at
the dash or instrument panel through which the"
?uid'passes'is provided to control the pressure
to the. stabilizer or lifting members atrthe proper '
side of thecar. depending-upon the direction‘of "
turnand load to eliminate swap or tilting’an'd“
possibility of the car. turning over or turtle.
To the foregoing objects; and others which may.»
hereinafter more fullyappear, the invention con-'
sistsof the novel construction, combination andv
arrangement of parts, as will be more speci?cally "
referred to and illustrated in the accompanying
drawings,- but it is to be understood that changes; ».
ing‘air‘or'oi-l.‘ PumpkMiis-connected bya pipe'
l5‘it'o1a reservoir- |6?,lboth' suitably supported on"
thewautomobileframepr chassis; said reservoir
having=a<?lling opening and-plug I1. A pipe IB-l
extends‘ from the >out1etfof the pump “to a pres
sureiireg-ulator“ [Bi-Fat the ‘front intake or inlet end‘?
thereof-‘and'appipe 7'20 leads" ‘from the outlet 2 I at ‘‘
thebottomiand‘ ‘between the ends of the regulator‘
I 9::back1tothereservoirl 'l 6.1'
A pipe 22 connects the reservoir |6"through~
branchesn23i- to the-‘:outlet'ends' 24101’ a selector
valve: 25." positioned andt' supported as I by- bolts:
through‘. aperturedirlu‘gsriili‘ onthe car frame or‘
chassis: our. one; side: rail thereof adjacent‘ the
steering," 'gear: 211:‘ of. the automobile operable by»?
thezsteering» wheelion‘zth'elsteeringipost 28. The
steeringzgearl'or.WOrmZ'driVe‘ZThas the usual outlr
standingrhorizontall'orrcross: shaft 29 to-whichi
the: usual i pitinan arm-1 30' is:- connected and re
tained;:thereon.as byqa1nuti3l‘to connect‘at 323
_;_to:-and' operate aisteerin'grrod 33 connected to the
usual linkfandiiarms\3'4fati‘th'e steering knuckles
35‘offthe'frontisteering‘spindles36 and wheels 3T
as seenr-iniFiguresi'l;andi2.ii A‘5pipe"38"leads from".
th-etpump‘v llleatzpiperil?l'through branches 391to1
variations, and modi?cations may be resorted “to ; inlets 40 of selectorivalve‘25l:
Whichfall within. thescope-,of-theeinvention asv
Selector-- valve:v 25 ‘comprises. spacedi axially
claimed.
aligned horizontalicasings orrcylinders- 4| ' con
In the drawings: .
nected‘. as .:by;’ as: bracket? plate L 42" on'1 which lugs?
Figure. 1 is a diagrammatic View showing the»,
2612MB :formed "to. supportithe'valven Casings Mi
application
of the stabilizer or sway eliminator 5(ylarerof-like constructionzand branches-23 at out
applied
toa car.
Figures 2 .and ‘3. arelfragmentarytransverse ele- '
vations. showing . a. stabilizer cylinder , applied on ».
let ends Hand 39 of pipe:38.1may be connectedfaté
intermediateaori- central ‘: inlets 1 40 of each as‘ by“
means: ofae threaded Znipple 501” coupling :43 ‘having->-v
the front and rearaxles of acar.
or othersconnectionattthe- inlet passages-1
Figure 4 is a vertical sectionalelevationof a<55e threaded
as-atM:
2,490,719
3
A common valve plunger 45 having cylindrical I
bottom of a primary piston 81 which reciprocates
in the cylinder. A spring 88 is seated in the re
valve pistons 46 at its ends to reciprocate in cas
cess of the ?anged piston 81 and its upper end is
ings 4| is provided intermediately with a vertical
likewise seated in a recess in the bottom of a
slot 41 enlarged or ?ared at the bottom, and an
secondary piston 89 which operates in the cylin
arm 48 is loose on and extends upwardly from
der 52.
shaft 29 of the steering gear 21 and journals a
Piston 89 has a breather hole 9!! equivalent to
roller 49 in its upper end to operate and roll in
a bleeder duct to prevent the formation of a dash
slot 41 and constituting a shiftable operative con
pot in the reciprocation of the piston and the pis
nection between the shaft 29 and arm 48 with
the plunger 45 for reciprocating the latter and 10 ton rod 9| thereof extends upwardly through and
above the open upper end of the cylinder which
its pistons 46 in the casings 0r cylinders 4|. Lugs
is closed by a substantially frusto-conical corru
50 ?xed in spaced relation on the upper rounded
gated and expansi’ole and contractible rubber boot
end of pitman arm 30 have threaded apertures in
or dust cap 92 fastened at its lower end around
which screws 5| are adjustable with springs 52
. between the opposed inner ends thereof and a lug
an external groove in the cylinder 62 as indi
53 projecting from arm 4a to regulate the ten
sion of the springs and balance thereof as well
cated at 93 and receiving the piston rod 9| through
ing longitudinal groove 51 for drainage through
The pipes I8 and 2|! connected to the pressure
regulator I9 at the intake 91 and the outlet 2|,
may be effected through the medium of nipples
its upper end and a ?anged or concave-convex
metallic disc or plate 94 mounted in the upper
as the movement and action of arm 48 and plung
end thereof.
er 45 and its pistons.
The upper end of the piston rod is provided
Pistons 46 formed in the ends of the plunger 20
with an eye or grommet 95 which, together with
45 are cylindrical to operate in the cylindrical
the eye 19, is connected to pivots 96 in brackets
bores of the casings or cylinders 4i and packing
provided at the frame members 57 and 12 and in
nuts or glands 54 are provided around the plunger
the spring bars 58 and springs '13, respectively, so
45 at the inner ends of the casings 4|, being shown
as to exert a lifting pressure therebetween to
as rings mounted on reduced threaded portions
raise the side of the car in the direction of the
55 of the casings to prevent leakage of the ?uid at
turn to stabilize and prevent sway or tilting
such points. Each piston is also provided with
thereof when rounding turns as will be herein
an annular groove 58 around its periphery toward
after more fully described.
its inner end, from‘ which extends a communicat
discharge outlets 44. Outlets 58 are located inter
mediate the ends of the casings and each having
a Y-?tting 59 connected thereto with couplings
or nipples 69 for discharge pipes 6| which lead to
expansible stabilizing members or cylinders 62
at the right and left hand sides of the automo
bile. Pistcns 46 are further provided with dia
metrical passages 63 spaced from the grooves 56
outwardly of the pistons 46 through which the
flow of the ?uid under pressure is effected from
the ports at the inlet passages 44 to the outlet
passages 58 when the passages 63 align therewith
at diametrically opposite sides of the cylinders.
A longitudinal slot 64 is also cut in each piston
radially from its periphery through the outer end
thereof as seen in Figure 4, to receive a key 65
secured as by a screw 66 to the interior of the
casing 4| to prevent the pistons from turning or
rolling out of line.
The expansion stabilizing members or cylin
ders I52 are of like construction and at the front
are mounted between the ends 61 of the front
or couplings 98 and the regulator comprises a
casing 99 with a plug I69 threaded in one end and
the opposite end provided with a reduced threaded
neck I?I extending through an opening I02 in
the dash or instrument panel I03 of the automo
bile in connection with a dial plate I04 having
an annular dial I05 held in position by a clamp
ing nut I96. A plunger I0‘! is disposed in the
cylindrical bore of .the casing 99 and is in the
form of a ?anged cup in which is seated one end
of a spring I98, the opposite end of which bears
against a washer I09 engaged by an adjustment
screw IIU threaded through the adjacent end of
the casing 99 and the neck IIJI, the nut I05 also
constituting a packing gland and the dial plate
I04 being anchored to the casing as by a pin III
extending through the dash I03 and into the
outer end wall of the casing 99.
A handle H2 is secured to the outer end of the
adjustment screw III) and has a pointer II3 co
operating with the dial I05 to set the plunger III‘!
at any desired position by rotation of the handle
bar 68 cushioned therewith in connection with
the springs 69 and links 10 and ‘II or other suit 55 II2 to determine the quantity and pressure of
?uid passing through the regulator valve 19 at
able construction provided for this purpose, the
the inlet I90 through pipe I8 and through the
spindles 38 being shown pivoted to the links 10
outlet 2| and pipe '20 back to the reservoir l5 for
at 35 as heretofore described. At the rear end,
supplying the proper ?uid pressure to the sta
the cylinder is shown interposed between the rear
ends of the frame 12 and the springs 13 hearing 60 bilizer cylinders 62 at either side of the car, by
regulating the lay-passing of the ?uid through
the ends 14 of rear axle II in its housing ‘I5 and
the regulator valve I9 depending upon the posi
in which shock absorbers or snubbers ‘Ill are also
tion of the plunger I01 determined by the setting
mounted between the rear axle or springs and
of the handle H2 and the pointer I I3 with refer
frame 12 with suitable cushion bumpers 'l‘! at the
65 ence to the dial I05 which as shown is calibrated
front and ‘I8 at the rear, if desired.
in regular divisions from one to twelve or other
Cylinders 62 are provided with grommets or
wise.
eyes ‘I9 at the bottom, the casting at the lower
In the operation of the device, ?uid is supplied
end of the cylinder being formed with an angular
to the reservoir I B and with the motor H! in
passage 88 for connection to the pipes 9| as by a
nipple or coupling 8|. A rubber or other cushion 70 operation, proper pressure is maintained by the
pump I4 to circulate the fluid to the regulator
bumper block 82 is seated in a recess 83 in the
valve I9 and through the same back to the reser
lower end of the cylinder and bears a ?anged
voir. The ?uid also flows through the pipe 38
steel cap 84 around which a light coil spring 85
and its branches 39 to the selector valve 25 as the
is mounted to exert upward pressure against a
rubber cup 86 positioned or secured against the 75 respective casings or cylinders 4| thereof for
axle Ii! or frame of the car and the knee action
1:
distribution through the pipes; 6| to the proper? :having: azcentra-l
_
hole: 1.15am whichsaebushingilzl?ii"
side- of .> the . automobile. determinediby the. diIlQQ-s
tion} of; turning, in. steering .the.\ car andsthe
operation of=»the. steering gear .21. This: deter;
mines thedirectionofswing of-zthe pitman arm
30 and thus thelzarrn;48.,extendingiupwardly from
the shaft 29 thereof and regulated in its move
ment bythe adjustment screw'sfv! and springs-52.
In the position shownvin.Eigurelllofsthe drawings,
the plunger 45 is shown moved forwardly to align
the passage 63 with the pipes 39 and El through
the Y-?tting 59 at the inlet 40 and outlet 58, to
cause the ?ow of the ?uid under pressure to the
is secured and through whichthe pistontrodl?zi:
operates". ~ Elugllitthas a breather hole ll‘! over
which an apertured checkgvalve _ H8 having a
,_. small aperturei'l'illl} operatesJto-permit the ?uid
01:
airltorbefexpellediirom{Within marinara-t2
above the secondary
‘
r
'
piston 89; when raised; by;
Pressure and?qnermit s.1.1.<.>h...11ui.d-o.r-air.to enter
the cylinder) when» the pressure is relieved and
gthe pistes: 89 moves down.
- "
Iiclaimau
.
f
"
1. A stabilizer and sway eliminator for auto
mobiles having a chassis, front and rear axles,
cylinders 62 at the left hand side of the car when
a turn is made in the opposite direction. How 15 and. a steering gear including a rockable shaft
having a pitman fixed thereon; said stabilizer and
ever, when a turn is made to the right, the
sway eliminator comprising hydraulic lift devices
plunger 45 will be shifted in the opposite direction
‘disposed between the chassis and each end of said
by the movement of the arm 48 and roller 49 in
front and rear axles, and means for supplying
the slot 41, to connect the corresponding passage
63 with said pipes at the rear casing 4|, to cause 20 ?uid under pressure to said lift devices independ
ently at opposite sides of the automobile and
the ?ow of ?uid through the pipes 6| to the right
operable upon steering the automobile in making
hand side of the car when a turn is made to the
a turn, said means including a source of ?uid
left.
under pressure, a pair of axially aligned cylin
The ?uid pressure supplied to the stabilizer
cylinders 62 will enter the bottom thereof through 2. drical valve bodies, conduit means connecting
said source to said bodies and each of said bodies
the passages 80 to raise the primary pistons 81
which are followed by the cups 86 and retained
thereagainst by the springs 85. This compresses
the springs 88 against the secondary pistons 89
to raise the latter and the piston rods 9| to eX- "
pand the rubber boots or dust caps 92 and exert a
lifting pressure against the frame and body of
the car from the axles whereby side sway is elimi*
nated and the car body maintained in a stabilized
position to prevent tilting and possible turning
over, turtle or somersaulting. In order to elimi
nate side sway of the car when making a turn
at high speed, the action of the stabilizer parts in
relation to each other is as follows. First, in
order to put the stabilizer in operation, the regu
lator control handle H2 regulating the pressure
to the stabilizer cylinders is turned to the proper
setting on the dial depending upon the load and
the speed of travel of the car. The faster the
speed and the heavier the load on the car, the
higher will be the setting of the pressure regu
lator and this will be determined by the number
of passengers or load carried.
to said lift devices on opposite sides of said auto
mobile, a, valve piston slidable in each of said
bodies, a common plunger actuator having the
opposite ends thereof ?xed to said pistons, a
centrally disposed slot extending through said
plunger, an arm having one end loosely mounted
on the steering gear shaft, the opposite end of
said shaft extending into said slot, and adjustable
spring means carried by said pitman and engag
mg sald arm on the opposite sides thereof for
preventing rotation of said arm relative to the
shaft whereby rocking of the shaft will result in
sliding of said valve pistons for controlling the
?ow of pressurized ?uid to said lift devices.
2. ‘In an automobile and stabilizing and sway
eliminating system therefor having a chassis,
hydraulic lift devices interposed between said
chassis and the opposite ends of the front and
rear axles thereof, and a steering gear including
and a pitman arm secured
The pump l4 de
velops the necessary pressure to operate the
stabilizer, the pipe l8 leading from the pump to
the regulator valve [9 and the pipe IE to the 50
reservoir Hi from which the ?uid is drawn by the
pump. The pipe 38 leads to the regulator valve
25 through the branches 39 of the respective
cylinders or casings M for supplying fluid to the
right or left hand sides of the car, depending
upon the position of the plunger 45.
Thus, the position of the plunger 45 is deter
mined by the operation of the steering wheel of
the car and the direction of turn in one direction
or the other, that is, to the right or left so as to GU
turn the shaft 29 and simultaneously actuate or
reciprocate the plunger 45 so as to change the
of said inlet ports, return ?uid conduit means
position of the selector valve 25 and the pistons
connecting said ?uid return ports to said source,
46 thereof. If the turn is made to the right, the
selector valve opens to cause the ?ow of the ?uid 65 11ft device conduit means connecting the lift de
vices on one side of the automobile to the outlet
to the left side of the car which raises the left
port of one of said bodies and the lift devices on
side, therefore resisting the force of gravity and
the other side of the automobile to the outlet port
thrust of the body and load of the car with the
of the other of said bodies, a common actuator
frame on the axles and springs thereof tending to
cause side sway or tilting, thereby maintaining 70 plunger for said ‘pistons, a transverse slot extend
mg through said plunger, an actuating arm
the stabilized position and equilibrium of the car
_ having one end loosely mounted on said rockable
to eliminate side sway.
shaft and the other end slidably received within
The upper end of each cylinder 62 is prefer
said slot, and resilient means adjustably carried
ably closed by a cap or plug H4 threaded or
otherwise secured therein and forming a head 76 by said pitman arm adapted to engage said actu
ating arm on the opposite sides thereof for sub
2,490,719
8
7
stantially preventing rotation of said actuating
Number
Name
Date
2,247,749
De Venel __________ __ July 1, 1941
Freret ___________ __ Oct. 21, 1941'
2,353,503
5.’: 2,387,249
Rest et a1 _________ __ July 11, 1944
REFERENCES CITED
The following references are of record in the
?le of this patent:
Number
arm relative to said shaft.
JOHN K. TANK.
UNITED STATES PATENTS
Number
Name
Date
2,073,180
Rink ____________ __ Mar.‘ 9, 1937
2,260,102
Eddington ________ __ Oct. 23, 1945
FOREIGN PATENTS
521,741
10
Country
Date
Great Britain ____ __ May .30, 1940
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