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Patented Aug, 3, 1948
. 2,446,274
UNiTED STATES PATsNroFFlca
VALVE
.lohn N. Gladden, Glendale, Calif., assignor to
'
Gladden Products Division of Los Angeles Turi
Club, inc., Glendale, Calii’., a corporation of
California
Application Aufrüst 23, 1943, Serial No. ‘499,617
schim. (Cl. 251-167)
l
2
'My invention relates to fluid-control valves
ing a valve seat and a, cooperating valve face,
thev seat or the vface, or both, being formed of
molded plastic material and the relative move
ment of the members being such that the seat
and, more particularly, to a novel valve insert
made wholly or in part of a molded plastic ma
terial.
'
`
face come into pressural engagement
through substantially longitudinal motion, as
The preferred embodiment of the >valve in
cludes a valve body with a ported chamber in
vand
.distinct from a, rotary motion.
It is -also an object of the present invention
which is later closed in whole or in part by a,
to provide a valve member and a seat member
cap or other closure means. Such a valve is 10 combined,'if desired, with a guide member, one
often used alone or in conjunction with other
_or all of such members being formed of molded `
plastic material.
valves for the control oi hydraulic equipment on
Another object of the invention lies in the
an aircraft; and will be particularly exemplified
provision of a two~element insert or seat struc
with reference to the control of the cowl flaps
of an airplane.
_
`
15 ture for a valve and to provide a simplified means
for sealing the insert or seat structure with
It has previously been proposed to associater
respect to the surrounding body and an operat
the valve insert with the closure means in a
-ing'member for the valve.
unitary manner, the entire structure 'being
‘ Other objects- lie in the provision oi’ novelly
formed of metal and being sealed with respect
to the~ valve body by employment of suitable 20 formed cageèlike elements, such as a seat mem
packing rings. One of the objects of the pres
ber and a guide member, of such shape as to
permit molding or die-casting thereof.
ent invention is to provide a valve insert or seat
Further objects and advantages of the inven
structure separate from the closure means.
.
which the valve insert or seat structure is re
movably inserted through a suitable opening,
.The previously-proposed unitary structure
tion will 'be evident to those skilled in the .art comprises an element dimcult and costly to 25 from the following description of exemplary em
manufacture as it' requires a multitude of ma
bodiments.
-
Referring to the drawing:
chining operations and entails diilicult assembly
steps for installing a valve member resiliently
Figure 1 is a cross-sectional view of a dual
valve assembly incorporating the preferred iii-_
engaging a seat of the unitary structure. It: is
an object of the present invention to provide 30 sert of the invention;
Figure 2 is an exploded view of the preferred
a simple easily manufactured, quantity-produci
valve insert and valve member, showing the shape
ble valve insert overcoming these dimcuities.
I lhave found it possible to use one or more
ot the_valve elements formed of molded plastic
valve elements formed of molded plastic ma
material;
‘
Figure 3 is a fragmentary sectional view taken
terial for the accurate control of fluid flow. In 35
the preferred embodiment, both the valve seat - '
on the line @-3 of Figure 1;
_
and the4 face of the valve member cooperating
‘Figure 4 shows an alternative embodiment of
therewith are molded-plastic-material surfaces.
the valve insert of the invention;
Tests have shown that these-surfaces can be
Figure 5 -is av sectional View of another ‘em
accurately molded and require no further ma. 40 bodiment of the invention; and
Figure 6 is an enlarged perspective View oi the
chining, lapping, grinding, etc., and, further,
that a plastic-material valve insert is very de
valve‘member of Figure 5.
‘
pendable in operation over long periods of time
I have Vchosen to illustrate the invention as
and can lbe used to control the flow of extremely
applied to a dual valve assembly for controlling
high-pressure fluids. The surfaces are not su-b
the flow 'of high-pressure fluid to control the
movement of a servomotor or actuator 9 pro
ject to corrosion and offer a. slight amount of
viding a cylinder i0 with a piston li movable
resiliency very idesirable in insuring accurate
seating of the valve member.,
‘
ì
therein and connected byv a rod l2 with the cowl
It is an object of the present invention to
iiaps of an airplane, not shown,v or with other
provide a valve having one or more valve ele
ments formed of molded plastic material and
preferably providing a valve surface formed
50 mechanism to be hydraulically
actuated. A
valve structure It serves, when in one position
to deliver high-pressure iluid from a pressureV
»line I6 to a, pipe i1 to advance the piston il and
rod I2 rightward and, when in another position,
during the molding operation.
Another object ofthe invention is to provide
relatively movable members respectively provid 55 to discharge iluid from, the vpipe I'I to one por
2,446,274
3
4
tion of the return pipe I8 of the hydraulic sys
tem, thus permitting leftward movement of the
piston || by fluid supplied to the right-hand side
and the outer surfaces of such arms are sepa
rated by a distance less than the diameter ci
the inner portion 35 of the chamber 2| so as
thereof by valve mechanism not shown in detail.
to vprovide a peripheral chamber 42, best shown
The valve structure I5 provides a valve body 23
in Figure l.
providing chambers 2| and 2|', each respectively
The upper ring 4| cooperates with a reduced
having openings 22 and 22' communicating with
diameter neck 43 molded integrally therewith in
one side of the valve body 2|). A suitable closure
defining a tubular portion of the seat member
means closes at least partially each of the open
32 providing a fluid-conducting passage 44
ings 22 and 22'. As shown in Figure 1, an ex~ 10 aligned with, but larger in diameter than, the
ternally-threaded recessed head or plug 23 com
opening 33. At the junction of the ring 4| and
pletely closes the chamber 2|, while a similar
the reduced-diameter neck 43 is a radial shoul
recessed head fitting 24 closes the chamber 2l',
der 44a. A valve seat 45, preferably bevelled in
except for a» passage 25 provided by a threaded
ward to be of frusto-conical shape, is provided
nipple 26 connected by a fitting 21 to the pipe 15 at the extremity of the neck 43 and is preferably
I1 in a manner well known in the art.
Removably positioned in the chamber 2l is an
formed in the molding operation.
The guide member 33 is also molded integrally
and includes a lower ring 46 of substantially the
insert or seat structure 33 forming a first valve
element, and a valve member 3| forming a sec
ond valve element. Such first and second valve
same external diameter as the upper ring 4|
of the seat member 32 so that it can extend a
,elements cooperate in controlling the flow of the
distance into the inner portion 35 of the chamber
fluid, as will be hereinafter described.
The seat structure 38 is best shown in Figures
2|, as shown in Figure l. The inner diameter
of the lower ring 43 is such as to telescope with
the neck 43. Four arms 41 integrally connect:
the lower ring 4S with an upper ring 4l dlmen-`
l and 2 and comprises two cage-like insert ele
ments hereinafter referred to, by way of expla
nation of the particular _valve shown, as a seat
sioned for sliding insertion in the outer portion
_member 32 and a guide member 33 adapted for
34 of the chamber 2|. The inner diameter of
assembly to form the ilrst valve element of the
the upper ring 48 is substantially the same as
preferred embodiment of the invention. As best
the external diameter of the lower ring 43 so
shown in Figure 1, the chamber 2| provides an 80 that the outer faces of the arms 41 comprise, in
outer or enlarged portion 34 for the reception of
eiîect, extensions of the outer periphery of the
a major portion of the guide member 33 and
lower ring 46 and are substantially in alignment
provides an inner portion> 35 of reduced diameter
with the inner periphery, indicated at 43. of the
for reception of the seat member 32. The ex
upper ring 48. These arms 41 are spaced from
treme inner end of the chamber 2| provides a 35 each other to define a cage-like structure and
. recess 36 into which a portion of the seat member
to provide fluid~conducting spaces therebetween.
32 extends.
The inner surfaces of the arms 41 may be flat
In the preferred embodiment of the invention,
or maybe segments of`a circle concentric with
the valve member 3|, the seat member 32, and
the axis of the upper ring 48. Such inner sur
the guide member 33 are each formed of molded
faces are spaced from each other to bound a
plastic material. By the term “molded plastic
guide passage extending toward the valve seat 45
material,” I have reference to any of the thermo
and to provide guide surfaces for guiding the
plastic or thermosetting plastics or resinous prod
valve member 3| in its longitudinal movement
ucts formed by compression or injection molding
toward and away from the seat 45. When the
and having properties similar to any ‘of the var
valve member 3| is disposed in the guide passage,
ious phenol condensation products, such, for
arcuate passages 50. are provided between the
example, as “Bakelite” A general-purpose plas
inner periphery 43 and the outer periphery of
tic material or a shock-resistant plastic material
the valve member 3|, these arcuate passages trav
can be employed in this connection, and a wide
ersing the upper ring 48 between the arms 41.
variety of mol'dable plastic materials is available. 50 The distance between the inner surfaces of
I have found “Bakelite” to be very satisfactory
opposed arms 41 ls also slightly less than the
in the valve construction shown, although it
inner diameter of the lower ring 4B, whereby the
should be clear that any of the various modern
bottom of each arm 41 extends into the space
plastic materials can be employed with various
within the lower ring 4B to deñne a. stop shoulder
55 5| forming a stop means limiting the degree to
degrees of success.
`
The seat member 32 is formed entirelyof such
which the seat member 32 and the guide member
-plastic material, molded ln the shape best shown
33 may telescope. This stop means is engaged
at the bottom of Figure 2. It includes a lower
by the upper end of the neck 43 and is so dis
ring 38 dimensioned for insertion in the recess
posed as to leave an annular groove 52 between _
. 36 and providing an opening 39. Integral with 60 the lower end face of the lower ring 43 and th'c
and extending from the periphery of the lower
radial shoulder 44a of the seat member 32. A
' ring 38 are four arms 40 spaced from each other
sealing means is disposed in this annular groove
52, preferably a doughnut-like sealing ring I4
to define a cage-like structure and to provide
_ñuid~conducting spaces therebetween. The
formed oi' rubber or other resilient material, and
lower extremities of the arms 40 terminate inter 65 adapted to form a tight seal between the outer
and inner portions 34 and 35 of the chamber 2l
mediate the upper and lower faces of the lower
by pressural engagement with a wall of the por
ring 38 to provide a stop means limiting the
tion 35. As shown, the annular groove 52 is pref
movement of the ring 38 into the recess 36. The
erably of a width greater than the sealing ring 54
upper extremities of these arms are molded inte
grally with, and depend from, the lower surface 70 but. if desired, it may be made of such width as
to compress and expand the sealing ring.
of an upper ring 4|, dimensioned externally to
The valve member 3| comprises an integrally
form a sliding nt in the inner portion 33 of the
molded member having a cylindrical body portion
chamber 2|. The inner surfaces of opposed arms
58 with a molded tapering or conical face 60
44 are separated by a. distance substantially equal
adapted for engagement with the seat 43 to con
t0 the 'external diameter of the lower ring 38,
5
cal body portion 58 is of such size as to slide lon
gitudinally along the guide passage formed within
the arms 41.
6 l
I
trol the flow of fluid therebetween. The cylindri
This cylindrical body portion 88
provides an integral head 6| of somewhat smaller Y
diameter. As best shown in Figure l, a com
pression spring 62 slips over and is centered by
this head 6| and extends in the recess of the re
f' - i'ace l0 at quadrant
/
positions. Correspondingly,
and as shown in Figure l, when the plunger II
is on one of the high spots 8|, the plunger ß'
engages one of the low spots 82. and vice versa.
When the valve structure is in the position
shown in Figure l, high-pressure fluid flows from
the- pressure line I8 into the circular space
around the arms 41, thence between these arms i
' movable head or plug 23. This spring urges the
and between the now-separated valve face 60 and
valve member 3| into resilient engagement with 10 the valve seat 45. It then advances internally
the seat A5. The slope of the conical face to
along the passage 44 through the neck I3, and
may be equal to, greater than, or less than the
the outer ring 4| and discharges betweexr, the
slope of the mating valve seat t5. I prefer to ' ar-ms Minto the peripheral chamber |52.> The
make these slopes slightly different, as shown in
valve body 2lik provides an angled passage lo
Figure 1, thus providing for substantially line
contact rather than surface contact between the
face Gil and the seat-d5.
The valve member 3| is displaced from the seat
«l5 to vopen the valve by pressure exerted through
an operating member, shown as a plunger di.
The upper end of this plunger is rounded to en
gage a recessedlower surface of the valve member
3i. The plunger passes through the opening 3o
of the lower ring 38 and is thus journalled in its
15 which conducts this fluid to the circular space
around the arms 41’ of the other now-closed valve
unit, whence it ñows through the passage 25 and
the pipe I1, as indicated by the arrow 88, to the
left-hand cylinder of the servomotor to advance
the piston Il rightward. When the cam 10 is
rotated through 90°, the valve member 3| will
move by the actionofspring 62 into engagement
with the seat d5 to close oil further flow of iiuid
from the pressure line i8. At the same time, the
_longitudinal movement. It extends also through 25 valve member 3|’ will be lifted from the seat |35'
an opening 6l of the valve body 2li into a cham
to open communication from the left-hand cylin
ber tt provided by a cover 69, being actuated by
der of the servomotor to the return line I8, the
. rotation of a cam lll integral with a shaft 7|
fluid flowing from the servomotor in the direction
extending from the cover 69 and through a panel
indicated by arrow 81 between the now-separated
l2. This shaft 1| is provided with a suitable knob 30 valve Gil' and v_alve seat |15', thence through the
or handle means 'F3 for manual turning of the
seat member 32' to discharge between the arms
thereof into the return line It.
In assembling the valve, a sealing means, such
For purpose of clarity, I have shown in detail
as a small rubber sealing ring iii, is disposed in
the fluid supply only for the left-hand cylinder
the recess 3d. ' The seat member 32 and the guide 35 of the servomotor. The .right-hand cylinder
member 33 are then inserted, either separately or
thereof is conventionally controlled by pressure
together. with the sealing ring 56 in place. A
applied to and discharged from the right-hand
suitable sealing means in the form of a gasket or
side of the piston il through a pipe S0 corre
sealing ring ‘il is then inserted and the plug 23
sponding to the pipe l1. The actuating fluid
cam.
~
~
is screwed tightly in place. This compresses the
flowing through the pipe 90 is best controlled by
ring ‘il to form a tight seal between the guide
va valve structure substantially identicalwith the
member 33 and the plug 23 and valve body 20.
.valve structure l5 and operated by the same cam
Such movement of the plug 23 may also be utilized
l0, the arrangement being such that, when fiuid
to compress the sealing ring 5t if this ring is suit
is supplied to one side of the piston, it is dis
ably dimensioned to be deformed when the seat 45 charging from the other side, and vice versa. The
member 32 and the guide member 33 are tele
manner of operating both valve structures from
scoped to a imsition determined by the stop
the same cam is suggested in Figure 3 and in
means. The lowermost ends of the arms dll pro
volves disposing corresponding plungers of -the
vide stop means for limiting the inward move
other valve structure in. sliding engagement with
ment of the seat member 32 and, when this stop 50 the cam surface 80 at points indicated respec
means engages the bottom wall of the chamber
tively by dotted lines 95 and 95'.
.
2l, the sealing ring 15 will be'compressed to form
While I prefer to design the seat structure 3d
‘n multi-purpose seal. In the first place, this
so> as to comprise two units, namely, the seat
sealing ring will effectively seal the seat member
member 32 and the guide member 33, it is within
t2 and the valve body 20. It is also dimensioned 55 the contemplation of the invention that these
to be compressed around and in sealing relation
members should be formed` integrally. Such a~_
ship with' the plunger 65, while permitting slid
construction is suggested in Figure 4, in which a
ing motion of this plunger under the action of
seat member |00 and a guide member lill are
the compression spring 62.
`
formed of plastic material unitarily molded. In
The valve insert in the adjacent chamber 2|' 60 this embodiment, a groove 302 for reception of
may be formed identically with that previously
sealing ring 54 is molded in the periphery of the
described and is indicated by corresponding
insert.> Otherwise, the dimension relationships
primed numbers. The compression spring l82' in
this instance provides turns spaced from each
may be the same as previously described with
reference to Figures l and 2 and a valve member
other so that fluid may flow thereth'rough into 65 |05, identical with the member 3| previously de
and from the passage 25.
scribed,- can be employed.
' '
»
The arrangement of the two adjacent valves is
Another integrally formed seat structure is
such that one opens when the other closes and
shown in Figure 5. Here, a valve body |09> in
the cam 'Ill is designed with this in view. This
cludes intake and discharge ports H0 and IH
cam provides a cam surface 80 having two di 70 _and provides a chamber including an outer-.por
ametrically opposed high spots 8| and two- di
tion il! andan inner portion H3, respectively
ametrically opposed low spots 82, as best shown
communicating with the ports ||ll and Ill. The
in Figure 3; The axis of the shaft 1| is displaced
insert or seat structure comprises unitarily
from a line'joining the plungers 65 and 65' so » formed guide and seat members H5 and IIS,
that the plungers 65 and 85' engage the cam sur 75 shouldered to provide a valve seat ||'| which, if
2,446,274
7
desired, may be relatively sharp or which can be
» of conical form similar to that `previously de
particularly if the elements are formed as sug
gested in Figure 2, they .can be produced cheaply
scribed. The guide member H5 provides a plu
rality of peripheral openings |20 for communi
cation between the port |I0 and the zone above
the valve seat ||1, while the seat member H6
provides similar openings |2| for communication
between the interior of this seat member and the
and in quantity by a metal die-casting process.
In other instances, metal die castings can be em
to receive a plunger |32 bearing against a cam
tending radially inwardly therefrom.
ployed with a minimum of machining operations.
The embodiments herein illustrated are by way
of example and not by way of undue limitation.
Various changes and modifications will be ap
parent to those skilled in the art from these
discharge port lli. Sealing rings are provided,
10 exemplary showings and can be made without
as previously described.
departing from the spirit of the invention as de
In Figures 5 and 6, the valve member is indi
i'lned in the appended claims.
cated by the numeral |25 and is guided in a cylin
I claim as my invention:
,
drical -guide passage of the guide member ||5,
1. A valve insert member formed entirely of
being urged resiliently downward by a spring |26
molded plastic material and comprising a ring
fitting in a depression |21 of the valve member.
providing an end surface, a plurality of arms
To prevent a piston action and to provide open
4molded integrally with said‘ ring and extending
communications between the upper and lower
substantially parallel to each other from said end
ends of the valve member |25, suitable flats |30
'surface of said ring, and a second ring of larger
are formed thereon to permit flow of fluid trans
verse of the valve member during movement 20 diameter than the first-named ring and providing
internal and external peripheral surfaces, said
thereof. This valve member |25 provides a coni
arms being molded integrally with the said inter
cal valve face I3| similar to that previously de
nal peripheral surface of said second ring and ex
scribed, and is slightly recessed at its lower end
2. A valve seat mem-ber formed entirely of
|33, as previously described.
25
molded plastic material and comprising a tubu
In Figure 5, the valve is normally closed by the
lar portion providing end faces lying in planes
action of the spring |28. When opened, ñuid
perpendicular to the longitudinal axis of said
may flow from the port i I0 through the openings
tubular portion, one end face providing an an
|2ß, thence between the valve face |3| and the
valve seat | I1, being discharged through openings 30 nular molded-surface valve seat, a pluraliy of
arms molded integrally with said tubular portion
|`2| to the discharge port lil. The type of valve
and extending from the other end face in a
insert shown in Figure 5 can be employed in the
embodiments of Figure l or it can be used merely
direction substantially parallel to said longitu
dinal axis, and an end member molded integrally
In all of the embodiments ‘thus far described, 35 with said arms at the extremities thereof, said
arms traversing and extending outward from a
the valve elements are formed of molded plastic
portion of the periphery of said end member and
material. This has been found particularly de
said arms being spaced from each other to deñne
sirable, not only as expediting and decreasing the
fluid-conducting spaces therebetween.
’ cost of production but also in formingvalve ele
3. In a valve, the combination of : a seat struc
ments capable of prolonged use under adverse 40
ture including a valve seat member having a valve
conditions, even in the control of extremely high
seat. and including a guide means, said valve seat
pressure fluids. The type of valve construction
member including a tubular portion having said
shown is particularly applicable to the employ
valve seat on one side thereof and having a plu
ment of molded-plastic-material valve elements.
rality 'of longìtudinal- porting arms extending
The valve member 3|, for example, does not ro
from the other side thereof, the guide means com
tate in pressural contact with the seat 45, thus
prising a plurality of longitudinal guide arms co
eliminating any tendency ' toward peripheral
operating in defining a guide passage extending
grooving and avoiding excess pressures which
toward said valve seat member on the same side
might be applied if the valve member .were ad
vanced by means turning in ‘and threaded. with l thereof as said seat, said guide arms being cir
cumferentially spaced from each other to deñne a
respect to the valve body 20 or associated struc
fluid-conducting space longitudinally through said'
ture. Inthe preferred embodiment of the in
guide means and radially therefrom; .and a valve
vention. the spring 62 limits the pressural force
-member having a cylindrical side Wall dimen
between the valve member and the seat member
sioned for longitudinal movement in said guide
to a value which will not injure the molded sur-A
passage toward and -away from said valve seat and
faces. This spring acts as a biasing means tend
in engagement with said arms, said valve mem
ing to exert, a maximum predetermined pressure
ber having a valve face adapted to engage said
between the `valve member and the seat member,
valve seat.
this pressure being sufficient to insure a fluid- 4. In a, valve, the combination of: a valve seat
tight seal .in the zone of engagement but insuf 60
member having a tubular engaging portion and a
ñcient to crush or permanently substantially de
neck portion of lesser external diameter extend
form the molded-plastic-material surfaces.
ing therefrom with a valve seat at the end of said
While it is preferred that the entire valve ln
neck portion; guide means including a tubular
sert, including the valve member and the seat
member having a major bore adapted to telescope
structure, be formed of molded plastic material,
over said neck portion and a minor >bore of lesser
the invention comprehends also either that only
diameter than said major bore and forming an
one of these elements may be formed of plastic
annular shoulder therebetween, said shoulder be
material or that one or both _of the contacting
ing adapted to engage said end of said neck por
surfaces of the valve shall be formed of molded
plastic material, whether the entire supporting 70 tion to provide an external annular -groove having
side walls between the end of said tubular member
structure for such surfaces is formed of plastic
and said tubular engaging portion; annular sealing
material or metal. Further, it is believed that
means in said grooveysaid sealing means being
the insert structure of the invention is novel ir
of a size such that there is clearance between said
respective of whether it is formed of plastic ma
terial or of metal. In the latter instance, and 75 sealing means and said side walls; and a valve
as a single now-control valve.
9,448,974
member longitudinally movable in said guide
means and guided thereby, said valve member
having a valve face adapted to engage said valve
seat.
~
.5. In a valve, the combination of: a valve seat
member having a tubular engaging portion and a
neck portion of lesser external diameter extend
i, ing therefrom with a valve seat at the end of said
,
.«
10
arms extending from’said tubulary member, said `
arms ,providing a» longitudinal guideway therein,
at least one of said arms projecting radially in
wardly into the line of said bore to form a shoul
der adapted to seat on said end of said neck por
tion; and a valve member longitudinally movable
in said guideway and guided thereby, said valve
member having a valve yi'ace adapted to engage
neck portion; guide means including a tubular
said valve seat.
l
~
memberhaving a bore adaptedto telescope over l0 „ 8. A valve insert member comprising a iirst ring
said neck portion, and having a plurality of oir
providing an end surface, a plurality of arms
cumferentially spaced longitudinal arms extend
formed integrally with said ring and extending
_ing -from said tubular member, said arms provid
substantially parallel to each other from'said end
ing a longitudinal guideway therein. at least one
surface of said ring. and 'a second ring of larger
of said arms projecting radially inwardly into the 16 diameter than said ilrst ring and providing in'
line of said bore to forma shoulder adapted to
temal and external peripheral surfaces.'said arms
seat on said end of said neck portion:- and a valve
member longitudinally movable in said guideway
and guided thereby, said valve member having a
valve face adapted to engage said valve seat.
. 6. In a valve, the combination of: a valve seat
member having a tubular engaging portion and a
neck portion of lesser external diameter extend
ing therefrom with a valve seat at the end ot said
neck portion; guide means including a tubular
member havingI a bore adapted to telescope over
said neck portion, and having a plurality of cir
cumferentially spaced longitudinal arms extend
ing from said tubular member, said arms provid
ing a longitudinal guideway therein, at least one
of said arms proiecting radially inwardly into the
line of said bore to form a'shoulder adapted to
seat on said end of said neck portion; an annular
»
ring member disposed at the top of said arms, said
ring member having an external diameter greater
than said tubular member; and a valve member
longitudinally movable in said guideway and
guided thereby. said valve member having a valve
being formed integrally with said internal periph
eral surface of said second ring and extending
radially inwardly therefrom.
9.- A valve seat member comprising a tubular
portion providing end faces lying in planes sub
stantially perpendicular to the longitudinal axis
of said tubular portion, one end face providing an
annularvalve seat, a pluralityof arms formed
integrally. with said tubular portion and extend
ing from the other end face in a direction sub
stantially parallel to said-longitudinal axis, and
an e'nd member formed integrally with said arms
at the extremities thereof. said arms traversing
and extending outward from a portion of the pe
riphery of said end member and said arms being
spaced from eachother to deilne huid-conducting
spaces therebetween.
»
~
-
'
,
‘
JOHN N.-, GIADDEN.
REFERENCES v(BITED
` The iollowing references are of record in the v
ille of this patent:
_
face adapted to‘ engage said valve seat.
. UNITED yS'lZ'A'I'EB PATENTS
7. In a valve, the combination of:- a valve seat ß
member having a tubular engaging portion and a
Number
’
Name
f
' Date
neck portion of lesser external diameter extend
ing therefrom with a valve seat at the end of said -
neck portion, said valve seat member also having
a plurality of longitudinal porting arms extend
ing from said tubular portion deilning a iluid
conducting space therebetween; guide means in
cluding a tubular member having a bore adapted
to telescope over said neck portion, and having a
250,687
383,941
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1,041,287
.Budlong .......... -_ Oct. 1li,- 1912
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Langsdorii' .'. ....... _., July 9, 1913
' 2,019,257
Gibbs ..... -«. ..... _- Oct. 29, 1935
2,089,297
Abercrombie ...... _- Feb. 2, 1937
l 2,198,120
' Parker ............ _- Apr. 2, 1940
i plurality of circumferentially spaced longitudinal lo 2,294,702
2,295,774
van Der Werl? .... _- Sept. 1, 1942
- Corydon ..' ______ _-.- Sept. 15, 1942
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