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Oct. 8, 1946.
F. J. WRIGHT
2,409,091
HYDRAULIC APPARATUS
Filed Feb. 29, 1944
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F, J, WRIGHT
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2,409,091
HYDRAULIC APPARATUS
,Filed Feb‘. 29, 1944
2 Sheets-Sheet 2
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Bli'rcd J. “fright
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Patented Oct. 8, 1946
2,409,091
UNITED STATES PATENT OFFICE
2,409,091
HYDRAULIC APPARATUS
Fred J. Wright, Columbus, Ohio, assignor to The
Denison Engineering Company, Columbus,
Ohio, a corporation of Ohio
Application February 29, 1944, Serial No. 524,407
1
12 Claims.
The present invention relates to valves of the
?uid pressure operated type and more particularly
to valves for controlling the ?ow of liquid and
which are actuated by hydraulic pressure. The
present invention is a continuation in part of
my co-pending application Serial No. 491,500,
?led June 19, 1943.
One of the objects of the present invention is to
provide a pressure reducing valve employing a
poppet valve which divides the passage through
the valve into high and low pressure chambers,
and in which the movement of the poppet valve is
dampened by a piston slidable in a cylinder which
is in communication with the high pressure cham
(Cl. 137-153)
2
i the ?uid may ?ow freely thereabout in cham
ber 22.
Cylinder 3| extends through the top of the
valve body 20 and is in open communication with
the chamber v4! of a top cover 42. The cover is
secured to the valve body by suitable bolts (not
shown), and by a gasket 43 interposed between
the cover and the top of the valve body. A plug
45 which is open at the bottom and closed at the
top at 46 is threaded into the cover 42, and is
axially aligned with the cylinder 3| and the
chamber 4|. A spring 48 is interposed between
the top 46 of plug 45, and the top of piston 34 and
normally urges the valve body 31 downwardly to
ber, the dampening action being effected by pro 15 open the valve 29. An upwardly extending boss
viding for restricted flow of ?uid between the ends
53 is formed integrally with the valve body 37
of the cylinders, i. e., the spaces in the cylinder
above piston 34 and forms a retainer for the bot
tom of spring 48. The tension of spring 43 may
Further objects and advantages of the present
be adjusted by the plug 45 and the plug 45 is
invention will be apparent from the following de 20 locked in position by lock nuts 51 and 52, the
scription, reference being had to the accompany
latter forming a cap for the upper part of plug 45.
ing drawings wherein a preferred form of em
The lower end of the valve body 20 is closed by
bodiment of the invention is clearly shown.
a cover 54 having an upwardly extending boss
In the drawings:
55 which is received by the lower end of cylinder
Fig. 1 is a longitudinal sectional View of a valve,
32. A gasket 51 is interposed between the body
the section being taken on a plane on line l--!
20 and the cover 54. Cover 54 forms two cyl~
of Fig. 2; and
inders 58 and 59 which receives, respectively,
Fig. 2 is a longitudinal sectional View of a valve
pistons 61 and 62. These pistons are axially
but showing the movable valve body in elevation,
aligned with cylinders 3| and 32and cylinder 58
glue section being taken on a plane on line 2-2 of .30 is approximately the same diameter as cylinder
ig. 1.
3!. Cylinder 58 opens into the lower end of cyl
Referring speci?cally to the drawings, there is
inder 32 while cylinder 59 opens into cylinder 58
shown a valve body 20 having a low pressure
and is of somewhat smaller diameter than cyl
chamber 2! and a high pressure chamber 22. The
inder 58. Piston 6| includes an adapter 64 which
chambers 2i and 22 are connected, respectively, 35 is suitably secured to the piston BI, and piston
with an outlet port 24 and an inlet port 25.
62 may be formed integrally with adapter 64 but
on opposite sides of the piston.
'
Chambers 2| and 22 are separated from one an
other by a wall 21, a valve seat in the form of an
inserted ring 28 and a valve 23.
is herein shown as a separate element. The lower
end of cylinder 59 is closed by a plug 6 5.
It will be seen that port 25, chambers 22 and.
The valve body 20 is provided with axially 40 2| provide a passage for the ?ow of fluid through
aligned and longitudinally disposed cylinders 3i
the valve body 20 and the valve 29 is pushed off
and 32, cylinder 3| being shown at the top, the
lower part thereof opening into the low pressure
chamber 2 1; cylinder 32 is shown below the valve
of the seat 28. The lower part of the cylinder 32
is subjected to the mean pressure of the ?uid in
chamber 22, and in order to accomplish this, a
45 bypass is provided in one of the bodies which
leads from chamber 22 to the bottom side of piston
seat 28 and it opens into the high pressure cham
ber 22. These cylinders receive, respectively, pis
35, and, in the present illustration, this bypass is
tons 34 and 35, and, in the present illustration,
in the form of a restricted passage or ori?ce 67
these pistons and the valve 29 are formed inte
which exends longitudinally through the piston
grally into a movable body 31. The valve stem .50 35. The restriction offered by this passage 61 is
portion 38 in the chamber 2! is somewhat smaller
such that thepressure in the cylinder 32 below
than the piston 34 so as to provide for the free
piston 35 will correspond to the mean pressure
?ow of ?uid thereabout, and also the valve body
in chamber 22 and will not follow the pulsations
portion 39 which extends into the chamber 22
in chamber 22.
is somewhat smaller than the piston 35 so that 55 The movable body 31 is provided with a longi
2,409,091
3
tudinal passage 69 which connects at its upper
end with lateral passage 'lil in boss 50 and the
lower end is connected with a longitudinal pas
sage 12 in adapter 84, which passage, in turn,
is connected with a laterally extending passage
‘:3 leading to the lower part of cylinder 58. Thus.
the upper end of cylinder 3| and the lower end
of cylinder 53 are in open communication and
the same pressure prevails in each. Any ?uid
which escapes into the lower part of cylinder 53
opening in'the valve seat 28 is substantially the
same as the area of cylinder 33, the pressure
areas on the low pressure side of the valve body
‘37, which tend to lift the valve, are equal to
the areas tending to open the valve. In this
respect, the pressure areas are balanced.
Like
wise, since opposite sides of the piston 35 are
subjected to the same pressure through the ori?ce
69, the pressure areas on the high pressure side,
tending to open the valve, are equal to the pres
sure areas tending to close the valve. In this
will ?ow through passages 13, ‘I2, 69 and 10 into
respect, the valve is balanced as to fluid pres
the upper part of cylinder 31 and chamber 4| in
sure. This balancing is further carried to a con
the cap 42. Likewise, any ?uid which escapes
clusion by interconnecting the upper part of
upwardly by piston 34 will also escape into cham
ber 41. When the cover 42 is in the position 15 cylinder 3| with the lower part of cylinder 58
so that the fluid pressure tending to close the
shown in the drawings, this escaping ?uid can
valve balances the ?uid pressure tending to open
?ow through a passage '55 to an external drain.
the valve.
If desirable, cover 42 can be shifted 90° to a posi
The restricted passage 6"! in the piston 34
tion in which a passage 76, which connects with
prevents chattering or ?uttering of the valve
passage 15, registers with a passage T! in the 20
29 since in order to move the piston 34 upwardly
valve body 23. It will be seen that the lower
end of passage Tl terminates at a passage 19
or downwardly, it is necessary to displace or ?ll
the cylinder 32, and this ?ow from and to the
which is in open communication with the high
cylinder 32 is through the restricted passage.
pressure chamber 22. In either case, the outer
end of passage 19 is closed by a plug 8| but when 25 Consequently, pulsations in either chamber 2|
or chamber 22, which tend to cause such ?ut
passage 16 registers with passage‘ 11, the outer
tering or chattering, are not present. In this
end of passage 15 is closed by a plug. Thus in
manner,
chattering of the valve upon its seat with
the shifted position the cover 42, the upper side
the consequent effects of noise and wear are
of piston 34 and the lower side of the adapter 64
are subjected to the high pressure prevailing in 30 eliminated.
Opening and closing movement of the valve
chamber 22.
can
be controlled through a remote or extraneous
If it is desirable to subject the upper side of
pressure system and this is accomplished by
piston 34 and the lower side of adapter 64 more
shifting the cover 54 ninety degrees so that the
directly to the pressure in the low pressure cham
passage
88 therein registers with the passage 93
35
ber 2!, cover 42 is shifted 180° from the position
in the valve body 20. This passage 93 is con
shown in Figure 2, so that passage 16 thereof
nected with the laterally extending passage 94
registers with a passage 83 in valve body 28.
which terminates at the same side of the valve
Passage 83 is in open communication with the
body 20 as ports 24 and 25. This passage 94
laterally extending passage 84 which, in turn,
is in open communication with the low pressure 40 can be connected with a suitable source of remote
or extraneous pressure whereby the flow of ?uid
chamber 2i. The opposite ends of passage 84
through the valve 29 can be controlled by varia
are closed by suitable plugs 85 which may bere
tions in pressure in the remote or extraneous
moved and a coupling substituted for connecting
source. It will, of course, be understood that
the low pressure chamber 21 with other parts
45 when the cover 54 is shifted as described herein,
of the system.
the lower end of passage 81 will be blocked by the
As previously pointed out, valve 2-9 is urged
away from its seat 28 by the spring 48, but the
top side of cover 54.
spring is counteracted by pressure within the
cylinder 59 which acts upon the piston 62 and
invention as herein disclosed constitutes a pre
cylinder 59.
outlet ports and a passage connecting the same;
valve means in said body for dividing the pas
While the form of embodiment of the present
normally urges the valve body 37 upwardly. The 50 ferred form, it is to be understood that other
forms might be adopted, all coming within the
degree of opposition to spring 48 o?ered by the
scope of the claims which follow.
pressure in cylinder 59. is determined, in the il
I claim:
lustration shown, by the pressure within the low
1. A ?uid pressure reducing valve comprising,
pressure chamber 2 i. To accomplish this, a pas
sage leads from the low pressure chamber 2| to 55 in combination, a valve body having inlet and
This passage is more clearly shown
in Figure 2 wherein a longitudinally extending
sage into a high pressure chamber and a low
passage 81 extends from passage 84- through the
pressure chamber connected, respectively, to said
valve body 20 where it registers with a longitudi
nally extending passage 88 in cover .54. Passage 60 inlet and outlet ports, said valve means includ
ing a valve seat and a valve movable onto and
88 terminates at a longitudinally extending pas
away from the seat for controlling the ?ow of
sage !lil. one end of which is connected directly
?uid between said chambers, said high pressure
to the cylinder 59 while the other end is closed
chamber including a cylinder; a movable body,
by a plug 9|. From this it will be seen that
increase in pressure in low pressure chamber 2| 65 including said valve, forming a piston, said piston
being slidable in said cylinder, one of said bodies
causes an increase in pressure in cylinder 59
providing a restricted passage leading to oppo
whereby the valve 29 is moved toward closed
site ends of the piston, said body forming a third
position and when this pressure in chamber 2!
chamber and a passage connecting the same with
attains a predetermined high value, the valve 29
will be closed upon its seat. Conversely, when 70 a source of pressure; and means responsive to
an increase in pressure in the third chamber for
the pressure recedes in low pressure chamber 2|,
actuating the movable body to decrease com
the spring 48, acting against lowered pressure
munication between said chambers.
.
in cylinder 59, will move the valve away from
2. A ?uid pressure reducing valve comprising,
its seat to permit an increased ?ow of ?uid
through the valve. Since the diameter of the 75 in combination, a valve body having inlet and
5
2,409,091
6
outlet ports and a passage vconnecting the same;
valve means in said body for dividing the pas
means providing arestricted passage leading to
opposite ends of the piston, said valve body form
sage into a high pressure chamber and a low
ing a second cylinder and a passage connecting
pressure chamber connected, respectively, to said
inlet and outlet ports, said valve means including
the same with a source of pressure; means re
sponsive to pressure changes in the second cylin
der for actuating the movable body; said» valve
body means including a third cylinder extending
outwardly from the low pressure chamber and a
valve seat and a valve movable onto and away
from the seat for controlling the ?ow of ?uid
between said chambers, said high pressure cham
ber including a cylinder; a movable body, includ
ing said valve, forming a piston, said piston being
fourth cylinder extending outwardly from the
?rst mentioned cylinder, said movable vbody
means including pistons slidable in said third
slidable in said cylinder, one of said bodies pro
viding a restricted passage leading to opposite
ends of the piston, said body forming a third
chamber and forming a passage connecting the
and fourth mentioned cylinders.
>
6. A ?uid pressure reducing valve comprising,
in combination, a valve body having» inlet and
same with the low pressure chamber; and means 15 outlet ports connected by a passage; valve means
responsive to increasing pressure in the third
dividing said passage into'high and low pressure
chamber for actuating the movable body to de
sections connected, respectively, to said inlet and
crease communication between the‘high and low
outlet ports, said valve means including a valve
pressure chambers.
seat and a valve movable onto and away from the
3. A ?uid pressure reducing valve comprising, 20 seat to control communication between said high
in combination, a valve body having inlet and
and low pressure sections of said passage, said
outlet ports and passage connecting the same;
valve body forming a cylinder communicating
valve means in said body for dividing the pas
with said high pressure section; a movable body
sage into a high pressure chamber and a low
including said valve and a piston portion dis
pressure chamber connected, respectively. to said 25 posed for movement in said cylinder, one of said
inlet and outlet ports, said valve means including
bodies forming a restricted passage connecting
a valve seat and a valve movable onto and away
the ends of said cylinder at opposite sides of said
from the seat for controlling the flow of ?uid
piston, said valve body also forming cylinders
between said chambers, said high pressure chamhaving approximately equal cross-sectional areas
ber including a cylinder; a movable body. includ 30 on opposite sides of said valve seat, said movable
ing said valve, forming a piston, said piston being
body having piston sections disposed for move
slidable in said cylinder, one of said bodies pro
ment in said cylinders, one of said bodies having
viding a restricted passage leading to opposite
a passage connecting said equal area cylinders at
ends of the piston, said body forming a second
the outer ends of said piston sections; resilient
cylinder and a passage for connecting the same 35 means tending to move said movable body to
with a source of pressure; and a piston in said
space said valve portion from said seat; an actu
second cylinder movable in response to pressure
ating piston disposed for engagement with said
changes in the second cylinder for actuating the
movable body; and passage means for conducting
movable body. said piston moving said valve
fluid pressure to said actuating piston to cause
toward closed position when pressure increases 40 the same to move said movable body in opposition
in said outlet chamber.
to said resilient means.
4. A ?uid pressure reducing valve comprising,
7. A ?uid pressure reducing valve comprising,
in combination, a valve body having inlet and
in combination, a valve body having inlet and
outlet ports and a passage connecting the same;
outlet ports connected by a passage; valve means
valve means in said body for dividing the pas 45 dividing said passage into high and low pressure
sage into a high pressure chamber and a low
sections connected, respectively, to said inlet and
pressure chamber connected, respectively. to said
inlet and outlet ports, said valve means including
a valve seat and a valve movable onto and away
from the seat for controlling the ?ow of fluid
between said chambers, said high pressure cham
ber including a cylinder; a movable body, includ
ing said valve, forming a piston, said piston being
outlet ports, said valve means including a valve
seat and a valve movable onto and away from
the seat to control communication between said
high and low pressure sections of said passage,
said valve body forming a cylinder communicat
ing with said high pressure section; a movable
body‘including said valve and a piston portion
disposed for movement in said cylinder, one of
said bodies forming a restricted passage c0n~
necting the ends of said cylinder at opposite sides
slidable in said cylinder, one of said bodies pro
viding a restricted passage leading to opposite
ends of the piston, said valve body forming a
second cylinder and a passage for connecting the
with the low pressure chamber; and a pis
ton in said second cylinder movable in response
to pressure increases in the second cylinder for
of said piston, said valve body also forming cyl
inders having approximately equal cross-sec
tional areas on opposite sides of said valve seat,
said movable body having piston sections dis
actuating the movable body toward closed posi
tion.
posed for movement in said cylinders, one of said
'
bodies having. a passage connecting said equal .
5. A fluid pressure reducing valve comprising,
in combination. a valve body means having inlet
area cylinders at the outer ends of said piston
sections; resilient means tending to move said
movable body to space said Valve portion from
said seat; an actuating piston disposed for en
gagement with said movable body; and passage
means for conducting ?uid pressure from said
low pressure section to said actuating piston to
and outlet ports and a passage connecting the
same; valve means in said body for dividing the
passage into a high pressure chamber and a low
pressure chamber connected, respectively, to said
inlet and outlet ports, said valve means including
a valve seat and a valve movable onto and away
0 cause the same to move said movable body in op
position to said resilient means.
from the seat for controlling the flow of ?uid
between said chambers, said high pressure cham
ber including a cylinder; a movable body means,
including said valve, forming a piston, said piston
being slidable in said cylinder, one of said body 75
8. A fluid pressure reducing valve comprising,
in combination, a valve body having inlet and
outlet ports connected by a passage; a valve seat
dividing said passage into high and low pres
2,409,091
7
sure sections connected, respectively, to said in
let and. outlet ports, said valve body having guide
cylinders on opposite sides of said seat, said guide
cylinders having substantially equal cross sec
tional areas, said valve body also having a cylin
der communicating with said passage; a mov
able body disposed in said valve body, said mov
able body having a poppet valve section for co
operation with said seat and piston sections dis
8
changes in the port connected therewith to move
said movable member, one of said bodies forming
a restricted passage extending to opposite ends
of a piston section to balance the pressures
thereon,
11. A ?uid pressure reducing valve comprising
in combination, a valve body having inlet and
outlet ports and a passage connecting the same;
an insert positioned in said body between said in
and outlet ports, said insert forming a valve
posed for movement in said cylinders; passage 10 let
seat, said body forming cylinders on opposite
means in at least one of said bodies to maintain
sides of said seat and having an open passage
extending from one of said ports to one end of
said body; a cap on the latter end of said body,
be balanced; a spring tending to move said mov
said cap forming cylinders and having an open
15
able body to space said valve section from said
passage connecting the passage in said body with
seat; and an actuating piston responsive to the
one of the cylinders in said cap; a movable body
fluid pressure in said low pressure passage sec
member in said body, said member having a valve
tion to move said movable body in opposition to
movable onto and away from said seat and piston
said spring toward a valve closing position.
9. A ?uid pressure reducing valve comprising 20 sections slidably disposed in the cylinders in said
body and a cylinder in said cap; means tending
in combination, a valve body having inlet and
to urge said movable member to a position where
outlet ports and a passage connecting the same;
said valve is spaced from said seat to provide
a valve seat disposed in said passage between said
communication between said inlet and outlet
inlet and outlet ports; said valve body forming
a pair of cylinders of substantially equal diame 25 ports; and a piston arranged in another cylinder
in said cap. said last-mentioned piston being re
ter on opposite sides of said valve seat and a third
sponsive to pressure changes in said outlet port
cylinder communicating with one of said ports,
to move said movable member in opposition to
a. body member disposed for movement in said
said urging means and prevent communication
valve body and having a valve for engagement
and disengagement with said seat, said member 30 between said inlet and outlet ports.
12. A ?uid pressure reducing valve comprising
having piston sections received by said cylinders,
in combination, a valve body having inlet and
one of said bodies having a restricted passage
outlet ports and a passage connecting the same:
leading to opposite ends of the piston section dis~
an insert positioned in said body between said
posed in said third cylinder and a passage con
necting said pair of cylinders, said valve body 35 inlet and outlet ports, said insert forming a valve
equal ?uid pressures on opposite sides of said
piston sections whereby said movable body will
forming a fourth cylinder at one end of one of said
seat, said body forming cylinders on opposite
sides of said seat and having an open passage
extending from one of said ports to one end of
said body; a cap on the latter end of said body,
bodies having an unrestricted passage for con
said
cap forming cylinders and having an open
40
ducting ?uid under pressure from one of said
pair of cylinders; and a fourth piston disposed for
movement in said fourth cylinder; one of said
passage connecting the passage in said body with
ports to said fourth cylinder to cause said fourth
one of the cylinders in said cap; a movable body
piston to actuate said movable body member.
member in said body, said member having a valve
10. A ?uid pressure reducing valve comprising
movable onto and away from said seat and piston
in combination, a valve body having inlet and
outlet ports and a passage connecting the same; 45 sections slidably disposed in the cylinders in said
body and a cylinder in said cap; said movable
an insert positioned in said body between said
inlet and outlet ports, said insert forming a valve ’ body forming a passage establishing communica
tion between a cylinder in said body and one in
seat, said body forming cylinders on opposite sides
said cap- whereby pressures on opposite ends of
of said seat and having an open passage extend
ing from one of said ports to one end of said body; 50 said body will tend to neutralize; and a piston ar
ranged in another cylinder in said cap, said last
a can on the latter end of said body, said cap
mentioned piston being responsive to pressure
forming cylinders and having an open passage
changes in the port connected therewith to move
connecting the passage in said body with one of
said movable member, one of said bodies forming
the cylinders in said cap; a movable body mem
ber in said body, said member having a valve 55 a restricted passage extending to opposite ends
of a piston section to balance the pressures there
movable onto and away from said seat and piston
on.
sections slidably disposed in the cylinders in said
body and a cylinder in said cap; and a piston ar
ranged in another cylinder in said cap, said last
mentioned piston being responsive to pressure 60
FRED J. WRIGHT. '
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