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Патент USA US2128636

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Áug. 30, 1938.
E.- W. ~IDAVIS
2,128,636
FLUID 4(.)ONTROL VALVE
Filed Aug. 2s, 1955
'5 sneetsi-_Sheet 2 _
WB
._
_),
is.,
_ Aug. 30, 1938.
E. w. DAVIS
'FLUID CONTROL VALVE
2,128,636
Filed’Aùg. _26I 1933
_s sheets-sheet s
„iw..,
QM,
2,128,636
Patented Aug. 30, 1938 '
UNITED STATES
_
PATENT oFFlcE
2,128,636 '
FLUID coN'rnoi. VALVE
ErnestW. Davis, 0ak~ Park, Ill.,\ assignor, by
mesne assignments, to Stewart-Warner Cor
poration, Chicago, Ill., a corporation of Vir
glnia
Application August' 26.1933, serial No. 686.928
7 Claims. (Cl. 137-139)
My invention relates generally to control means 20 being secured to the reservoir III by screws 22
for ñuid pressure actuated motors and the like, or any other suitable means.l The cover
and more particularly for pneumatically operated secured in closed position by turning down the
high pressure lubricant compressors.
wing nut 24 threaded on a pivoted screw 26, the `
5 _ It isan object of my invention to provide a nut engaging a slotted angle piece 28 welded to
_ pneumaticaliy operated lubricant compressor with
the cover I6. A bracket 30 welded to the reser
improved means for controlling its' operation. j'voir I0, and a rivet 32 carried by the bracket,
A further object is to provide an improved con
trolling means for pneumatically operated lubri
cant compressors in which the manually con
form a pivotal support for the screw 26.
Lubricant discharged from the pump is con
veyed through a ilexible hose 34 whichV at its 10
, tr'olled element may be located relatively remote
outer end is connected to the body 36 of a control
from the compressor and in .which but a single valve. A whip end lubricant discharge hose 38 is
air conducting conduit between the compressor connected to the body 36 of the control valve, and
and the manual control element is required.
' at its extremity carries a coupler 40 for making
A further object is lto ‘provide an improved
quick detachable connections with any one of a 15
lubricant compressor control means which will be plurality of lubricant receiving iittings 42 con
eiiicient in operation and which may be eco ' nected to bearingsv 44 to be lubricated. IAn air
control hose 46 is preferably clipped to or held
nomically manufactured.
_,
~
"
Other objects will appear from the following adjacent the hose 34 by means' of a sheath 48.
20 description, reference being had to_ the accom
' As shown in Fig. 7, the reservoir I0 is welded 20
panying drawings, in which:
to the casting I4, and the latter is secured to the
Fig-'1 is a side elevation of the ‘lubricant'com- _ base I2 by means of a capscrew 50, the upper
pressor with its valve controlled discharge con
surface of the base I2 being dished so that the
25
duit for supplying lubricant to bearings to be
cap .screw may be drawn tightly against the base
lubricated;
casting.
'
Fig. 2 is a sectional view taken on a broken
‘
25
Formed integrally with the base casting VI4 is
horizontal plane passing through the center line an air motor body 52 having a cylindrical bore
of the air motor and immediately above the pump Y64 in which thel piston 56 is reciprocable. The
end of the cylinder. 54 is closed by a head. 58
30
Fig. 3 is a side elevation of the lubricant com `threaded into the cylinder and‘locked in posi 30
pressor, the air operated lubricant pressure relief vtión by a tapered pin 60. (Fig. '1) which projectsv V
mechanism being shown in section;
’ ' through one ofv a plurality ~of notches 62 formed
~ Fig. 4 is a vertical sectionalview of the upper> in theiiangeof the head 58. A gasket 64 is inter
posed between the ñange of the cylinder head and
end o'f thelubricant reservoir and coverthere
35
the end of the cylinder body. A plunger rod 66 85
Fig.~ _5 is a detailed sectional view showing the is loosely connected to the piston 56 by an' in
.
cover hinge;
» 'n
»
wardiy ilanged sleeve 68, ahead 'III formed on
Fig. 6 is a vertical sectional view taken on the the end of the plunger rod 66 thus 'being retained,
cylinder
for;
-.
.
structure;-
'
»
v
v
line 6-6 oi’Fig.7`;
40
_
'
,
.
.
.
I
-
Fig. 7 is a'vertical sectional view taken on the
line ‘I-'l of Fig. 2;
‘_
Y
_
I _
and limited lost motion between the plunger rod ‘
Bland piston “permitted '
_
The air >motor is generally `similar -to that
~
Fig. 81s a centralvertical lsectional view of the- shown and describedin Davis Patents Nos. 1,830,
air bleed device; and
.
'
'
Fig. 9 is a central sectional
45
valve.
_
_
'
~
-
,
‘
'
'
view or the control
,
The lubricant compressor shown herein as an
643, and 2,051,290. It will suñice here to state that when air under pressure is supplied to the
cylinder ' 64 through its inlet opening 'I2,r the
piston 56 will be continuously reciprocated‘.
appropriate apparatus with which Íthe present
`The piston of the air motor is moved substan--
invention may be used ~is-_oiï the pneumatlcally
tially solely ~by «its kinetic energy _during that '
operated typeusable for the high pressure lu-'
50 brication of machinery, particularly automobiles.
portion of its stroke which is eiïective in. moving
the plunger through its pressure discharge stroke.
It comprises generally a hopper type reservoir
The piston will thus force the plunger to eject
vthe iubricantby -hammer-like~ blows, making it
voir I0 is closed by a cover t6 (Fig. 4). pivoted, possible to build upextremely high pressures.
upon a-hinge pin I8_ whichis secured toa hinge
The plunger rod 66 carries a plunger 14 which.
bracket 20, as shown in Fig. ‘5, the hinge bracketl is reciprocable in ay cylinder body 16. The body
I0, a base I2, and a body casting I4. _ Thenreser- -
l
2
16 is counterbored to form a seat 18 for a spring
pressed ball check valve 80, and has an inlet port
82. The cylinder body 16 is held within the body
I4 by a bushingv 84 threaded in the body and
5 engaging a ilange 86 formed on the cylinder 16.
A lock nut 88 and washer 90 prevent accidental
loosening of the bushing 84, and the cylinder
body 16 is held against rotation by a set screw
92 threaded in the body and having its end en
10 gaging in a notch cut in the ñange 86.
A T 94
is threaded in the end of the cylinder body 16 and
forms a means for attaching the discharge hose
34 to the cylinder outlet. An agitator rod 96 is
secured to the plunger rod 68 and is guided for
15 longitudinal movement in a bracket 98 which is
rigidly secured to a boss |00 projecting upwardly
_from the bottom of the casting i4 (as shown in
Fig. 6), by means of a cap screw |02. The agi
tator rod 96 thus reciprocates with the plunger
20 and plunger rod in a path extending over the
in the body casting I4. >The hose 46 is likewise
connected to the passageway |46.
Means are provided to relieve the lubricant
pressure in the discharge conduit 34 whenever
the‘compressor is not in operation, thereby to
relieve the hose of unnecessary strain, to facili
tate disconnecting the coupler 40 from the fit
ting _to which it may _have been attached, and
to eliminate the necessity of providing a valve
in the grease discharge conduit.
~
‘ This means for relieving the lubricant pres
sure in the discharge hose comprises a valve ñt
ting |48 (Fig. 3) threaded in the body casting
|4. The ñtting |48 is connected to the T 94
by a suitable conduit |50. A Valve |52 is cooper
able with a diminutive valve seat |54 formed
in the ñtting |48, and is biased to move from
the seat by'a compression coil spring |56. The
inlet opening 92, thereby breaking up any large
valve |52 may be formed integrally with a stem
|58 guided in a bore |60 and at its upper end 20
carries a -cup leather piston |62 which is recip
air bubbles which may be present in the grease.
rocable in a cylinder |64.
The upper end of the
This agitator mechanism is claimed in my Patent > cylinder is closed by a screw plug |66, the interior
N0. 2,062,447.
25
‘
Air under pressure is supplied to the inlet 12 _
of the air motor through a novel form of con
trol mechanism, best shown in Figs. '7 and 8, and
comprising a body |04. An air inlet fitting |06
is threaded in the body |04 and is adapted to
30 be coupled with a coupler |08 secured at the
end of an air supply hose | I0 (Fig. l). The body
of this cylinder being in communication with
the cylindrical bore 54 of the air motor through
a passageway |68. -'I‘he lubricant which passes
the valve |52 flows through a cavity |10 formed
in ‘the body casting I4 and which is in commu
nication with the interior of the reservoir tank
|0.
'
'
The manually operated control valve has a pair
|04 has a relatively small bore | |2 and a counter . of cored passageways |12 and |14 formed in the
bore ||4 therein. Within the bores ||2 and ||4 body 36, the passageway |12 forming a direct
is located a diilîerential piston assembly com- path of communication between the hose 34 and
35 prising a guide ||6,À a large cup leather piston the whip end hose 38.
An air relief valve ñtting |16 is threaded into
H8, and a smaller cup leather piston |20, these
cup leather pistons being suitably secured to the >the body 36, projecting into the passageway |14.
guide member H6.
The fitting |16 is drilled and bored to form a.
Air from the source of supply connected to shoulder |18 upon which a gasket |80 is seated.
«fthe fitting los is conducted to the upper end A valve |82 is normally pressed against .the seat
of the counterbore | |4 through a. highly restrict
by a compression coil spring |84. A valve op
ed passageway formed by a sleeve '|22 pressed erating plunger |86, polygonal in cross section,
into a drilled hole |24, and a plug |26. -The is guided within the iitting |16 and is -adapted
sleeve |22 is internally threaded throughout its to be moved inwardly to raise the valve |82 from
45 length, and the plug |26 has an external thread its seat by a trigger |88 which is pivotally se
extending the full length thereof. The thread cured to the body |36 by a shouldered screw |90.
on the plug | 26 is mutilated by having the apex Clockwise (Fig. 9) pivotal movement of the trig
portion thereof removed so that a helical pas
ger |88 is limited by engagement of the web por
sageway, substantially triangular in cross sec
tion |82 of the trigger with the boss |94 on the
'
'
50 tion, is formed between the cooperating threads valve body.
of the plug and the sleeve. Thus air is permit
In the use of the lubricant compressor control
ted slowly to bleed from' the source between the means of my invention, the a_ir supply hose ||0
plug and sleeve and through passageway |28 to is coupled to the compressor, whereupon the air
the upper end of the cylindrical bore ||4.
under pressure will flow through the ñtting |34
'I‘he body |04 has a sidewardly extending into the bores |24 and ||2. Due to the fact that .
55
threaded nipple portion |30 threaded in the inlet the area- of the piston |20 is much greater than
opening 12 of the cylinder body 52 of the air motor, that ofthe valve |36, the differential piston as
there being a passageway |32 extending through sembly ||6 will be moved upwardly, tensioning
the portion |80 into the body |04. The _air sup
60 plied through the inlet ñtting |06 may ñow into
the cylindrical bore ||2 through a port |34 butI
is prevented from flowing from t s bore into '
the passageway |32 by a hemlspheric l valve |36.
The latter is connected to the differential pis
65 ton 'member -| I6 by a tension spring |38, the ends
of which may be soldered or otherwise suitably
secured to- the diiïerential piston member ||6
_and the valve |36 respectively.
p
'
The lower end of the bore | 24 is closed by a.
70 plug |40 and the upper end of thecylindrical
bore ||4 is closed by a plug |42. A conduit |44
has one end suitably connected to the upper end
of the cylindrical bore ||4, the other end being
15' connected to an elbow‘passageway |46 formed
the spring |38 until the pull exerted upon the
valve |36 is suilicient to unseat it. Thereupon
air under pressure will iiow through the. passage
way |32 to the inlet port 12 of the air motor,
causing the latter to begin to operate. » In ashort
time, however, air Viiowing through the highly
restricted passageway formed between the sleeve
|22 and plug |26 will raise the pressure in the
cylindrical bore || 4, conduit |44, hose 46 and pas
sageway |14 sufficiently to cause the differential
piston assembly 'H6 to move downwardly. As
this assembly.moves downwardly the valve |36
will be seated, cutting off the supply of air to
the air motor.
To cause lubricant to be- forced to the bearing,
the trigger' | 88 is 'operated to open the -valve
|82. Thereupon the air pressure within the pas 75
2,128,686
sageway |14 and connected hose, conduit and
cylindrical bore ||4 will drop substantially to
atmospheric pressure, whereupon the air pres
sure exerted upon the piston |20 will raise the
differential piston assembly ||6, opening the
valve |36. After suflicient lubricant has been__
supplied to a bearing, the trigger |86 is released,
31
modifications and variations which. will readily
suggest ' themselves.
€
‘
What I claim as new and desire to secure b
-United States Letters Patent; is:
p
v
1. A control mechanism for a compressed airoperated'motor comprising, a valve to control the
ñow of air from a source of air under pressure to
the motor, air pressure operated means to hold
, whereupon the valve |82 will be returned to its
seat by a spring |84 and after a short interval ‘ said valve closed, a yielding operating connec
the pressure within the cylindrical bore ||4 will ' tion between said valve -and said piston, means 10
be built up by the restricted flow of air through
the passageway between the plug |26 and sleeve
|22, Aagain causing the diiïerential piston assem~
bly to move downwardly and close the valve |36.
The airflow through the restricted passage-'
way may be of- such size as to cause the pressure
to be built up Within the cylindrical bore ||4 in
a few seconds- after the `control valve |82 is
including a highly restrictive passageway for sup
plying air under pressure to said means, and a
valve manually operable -to vent said means to
the atmosphere thereby relieving the air pres
sure on said air pressure operated means and
permitting said ñrst named valve to open.
2'. In a mechanism Afor controlling a pneumati»
cally operated motor, the combination of a pas
sageway for conducting air from a source of >air
under pressure to an air operated motor, a valve 20
closed. By partially unscrewing _the plug |26
from the- sleeve |22 the quantity of fair flowing
through the helical passageway may be increased , in said passageway normally held closed by air “
if it is desired to have the air motor respond pressure, a pair of cylinders of different diameter
more rapidly to operation of the control valve.
However, the resistance vto flow of air through
the helical passageway should be suiliciently great
that an excessive volume of air is not lost through
, this passageway during the operation of the lu
bricant compressor.
adjacent -said valve, a pair of connected pistons ,
one in each of said cylinders, a spring connecting i
said pistons with said valve, means for supplying 25
air under pressure from said source directly to~
_the smaller of said cylinders, a highly restricted
passageway for conducting air under pressure
The connection between the valve |36 and the v from said source to said cylinder of largerv di
differential piston assembly ||6 formed by` the ameter, and manually operated valve means 1o
spring |38 causes the valve |36 to open with a -cated at a distance from said cylinders for re
rapid snap action. This is due to the fact that lieving- the pressure in the larger of said cylin
as the diiîerential piston assembly ||6 moves up'
wardly the spring |38 is stretched until sufficient
force is exerted to unseat the valve |36. As soon
as this valve moves the slightest distance away
from its seat, the air pressure upon this upper
surface is slightly decreased by the ñow of air
and _the pressure on its lower surface slightly
increased, thereby-making it possible for the
spring |38 to v,contract and rapidly- raise the valve
4O
ders.
'
30
‘
3. In a mechanism- for controlling the flow of
air under pressure to a-passageway, the combi 35
nation of a valve operable to control the flow of ,
air through said passageway, a piston for oper-`
ating said valve, a'resilient operative connection
between said piston and said valve, a cylinder for
said piston, a restricted passageway for conduct
ing air under pressure to said cylinder, and means
|36 from its seat. Whenever the valve |36 is located remotely from said cylinder fo'r venting
closed, the air pressure within the air'motor cyl--. said cylinder to the atmosphere.
.
inder 54 and hence in the piston cylinder |64
will drop rapidly substantially to atmospheric
pressure, and the. spring |56 will raisethe valve
|52 from its‘seat, thereby relieving the pressurel
in the lubricant discharge hose 34.
As previously pointed out, this relief of pres
sure in the lubricant discharge hose makes it un
necessary to provide a lubricant flow controlling
valve in the discharge hose, and with the type of
couplers 40 ordinarily used, makes it easy to dis
connect this coupler from the lubricant receiving
55 fitting. This means for relieving the pressure
in the lubricant discharge conduit also has the
advantage over the lubricant shut-oil! valve com
monly provided in the lubricant discharge hose,
because when the latter is'used the lubricant
pressure in the whip end portion 38 o1’ the lubri
cant discharge hose is not relieved and after the
coupler 40 has been disconnected from the lubri
cant receiving fitting the contraction of the hose
and the expansion of air mixed with the grease
will frequently cause a quantity of lubricant to
exude from the coupler.
t
While I have shown and described a particu
lar embodiment of my invention, it will be readily
understood by those skilled inthe art that vari
ations may be made in the construction disclosed
without departing from the basic features of my
. 75.
invention: I therefore do not wish to be limited
to the precise construction disclosed but wish to
include within; the scope of my invention- all such
4. A control mechanism for a fluid pressure
motor comprising a valve to control the flow of
fluid from a source of fluid under pressure to the
motor, -snap action means for controlling said
valve, means exposed to said ñuid under pressure
for- actuating said snap action means, control
means for accumulating fluid under pressure,>
manual means for relieving the pressure of the
fluid accumulated in said control means, fluid
How regulating means for supplying fluid under
pressure to said accumulating means, and means
operated' by the ñuid pressure in said accumu ' 56
lating means for closing said valve.
'
5. In a pressure operated valvestructure, -a
pressure chamber, a‘pilot valve arranged to re
lease pressure in said chamber, a ñuid conduit,`
means forming a relatively narrow passage which 60
aiîords communication between said fluid con
duit and the chamber, said chamber including a
cylinder and a plunger sealingly engaging the
cylinder and adapted to be actuated in one di
rection by the fluid admitted to the chamber 65
through said passage, a valve controlling the fluid
in theI conduit, and a spring operatively connect#
ing the plunger and said latter valve, whereby
upon release of pressure in the pressure chamber
the recoil of the spring will break the adhesion
between the plunger and the cylinder.
6. lIn a valve apparatus, means adapted to con
tain fluid under‘ pressure, said means having a
fluid Vdischarge v'alve including a discharge port
and a plug for closing the port, the plug and port
zo
„et
aiaaeae
being so arrangedv that pressure in the first-v
named means may move the plug to open the
port, means forming a pressure chamber and
means adapted and arranged to quickly release
pressure therein, the pressure-chamber-forming
cylinderY irrespective of static friction between
the coacti'ng plunger and cylinder surfaces tend
ing to cause the plunger to resist movement.
'7. In a‘jvalve apparatus, comprising a valve
adapted and arranged to close a fluid exit for
fluid underpressure, said valve including a part
means including a cylinder and a >plunger slid
able therein and operatively connected to the _ movableto‘ ñuid releasing position, a pressure
valve plug to close the valve when the plunger
moves in one direction in its cylinder. means to
supply fluid under pressure to the chamber, at a
relatively slow rate, said latter means acting in
cooperation with the~ plunger with greater ef
fective force tending to close the valve than is ex
erted‘ by said fluid under pressure in the ñrst
15 named means tending to open the valve, so that
the valve is normally maintained closed, the
chamberY and means slidable therein and yielding
ly operatively connected with said valve part in
a manner to cause it to close such exit. and to
subsequently move relative to said valve part
without affecting the operation of said part, and
means including a passage communicating with
said chamber to’ admit operating fluid under pres
sure to the chamber to actuate the slidable means,
a pilot valve operatively associated with the pres
operating connection between the plunger and ' sure chamber and adapted for operation to re
lease pressure in the chamber, said pilot valve
whereby, upon quick release of the pressure in , having greater fluid discharge capacity than said
the chamber the released energy will cause the passage. y
ERNEST W. DAVIS.
plunger to move in the opposite direction in its -
valve comprising resilient energy-storing means,
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