Patent USRE33633E successfully refreshed from Google Patents.
Patent US3583443A successfully refreshed from Google Patents.
US3583443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve with highly sensitive actuating means
Assignee: ITE Imperial Corp
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Filing: 1969-09-18
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Granted: 1971-06-08
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Expires: 1989-09-18
Abstract
Abstract The valve includes an axially shiftable valve spool having end heads and intermediate voids, said voids serving to direct a primary fluid under pressure to a mechanism in either of two directions, depending upon the shift of the spool. The valve body and accessory parts contain passageways, bores, and ducts, which provide for a secondary circuit of fluid bleeding constantly to atmosphere, but serving as the means to shift the valve spool axially in opposite directions.
Inventors
- 👤 Robin K Beckett
- 👤 Allen J Moffat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:02
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/0401; F15B13/0402; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86606
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
297 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end lands, and a plurality of reduced portions intermediate said lands for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for selectively establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid selectively constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for increasing the pressure of fluid upon said one end face of the valve spool, to shift the valve spool away from said orifice and means for holding said valve spool in a predetermined position away from said orifice regardless of bleed opening state including supply passage means opening to said body bore and selectively closed by one of said lands when the valve spool is in a position adjacent said orifice and selectively opened by said one land when the valve spool is in said position away from said orifice.
Claim 2
Dependent Claim
297 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end lands, and a plurality of reduced portions intermediate said lands for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for selectively establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid selectively constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for increasing the pressure of fluid upon said one end face of the valve spool, to shift the valve spool away from said orifice and means for holding said valve spool in a predetermined position away from said orifice regardless of bleed opening state including supply passage means opening to said body bore and selectively closed by one of said lands when the valve spool is in a position adjacent said orifice and selectively opened by said one land when the valve spool is in said position away from said orifice.
Claim 3
Dependent Claim
24 words
The valve as specified by claim 1, wherein the secondary passageway system is supplied with pressure fluid shunted from one of the primary passageways.
Claim 4
Dependent Claim
23 words
The valve as specified by claim 1, wherein the combination includes means movable interiorly of the valve for selectively closing the bleed opening.
Claim 5
Dependent Claim
60 words
The valve as specified by claim 3, wherein the means last mentioned includes a flexible diaphragm having opposite faces, one of which faces in flexing closes against the aforesaid bleed opening to close said opening; and means for directing a fluid under pressure selectively against the opposite face of said diaphragm, for flexing said one face against said bleed opening.
Claim 6
Dependent Claim
20 words
The valve as specified by claim 1, wherein is included in combination therewith means for selectively closing said bleed opening.
Claim 7
Dependent Claim
107 words
The valve as specified by claim 5, wherein the last mentioned means includes a control member shiftable from a normally retracted position, to an advanced position in closing relation with said bleed opening; a source of pressured fluid including a supply pipe for directing fluid to the control member tending to pressure-advance said control member, said pipe including at least one bleed orifice normally releasing pressured fluid to such an extent as to diminish the pressure upon the control member to a nonoperative value, said pressure upon the control member being increased to an operative value by closing of the bleed orifice associated with said supply pipe.
Claim 8
Dependent Claim
53 words
The valve as specified by claim 1, wherein the constricted orifice directing secondary fluid into the body bore is of a size approximating 0.022 inch in diameter, and the flow fed to said constricted orifice and to said open-ended passageway bore is limited by a constriction approximating a diametral dimension of 0.032 inch.
Claim 9
Dependent Claim
23 words
The valve as specified by claim 7, wherein the combination includes means for regulating the introduction of fluid to said secondary passageway system.
Claim 10
Dependent Claim
20 words
The valve as specified by claim 1, wherein the combination includes fluid-pressure actuated means for selectively closing the bleed opening.
Claim 11
Dependent Claim
111 words
The valve as specified by claim open-ended wherein said fluid-pressure actuated means comprises a control housing fixed relative to the valve body, said housing having an open-ended piston chamber one end of which is in communication with the aforesaid opposite end of the passageway bore; a piston reciprocable within said piston chamber movable from a normally retracted position, to an advanced position in closing relationship with said paSsageway bore; a bleed duct in said housing conveying to atmosphere the fluid escaping from said passageway bore when the piston is retracted; and means for directing an actuating fluid against an end of said piston for shifting said piston to the advanced position.
Claim 12
Dependent Claim
264 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said orifice, a booster duct for directing fluid under pressure from the secondary passageway system to that body bore end which is supplied through said constricted orifice, and including fluid-pressure actuated means for selectively closing the bleed opening.
Claim 13
Dependent Claim
264 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said orifice, a booster duct for directing fluid under pressure from the secondary passageway system to that body bore end which is supplied through said constricted orifice, and including fluid-pressure actuated means for selectively closing the bleed opening.
Claim 14
Dependent Claim
111 words
The valve as specified by claim 11, wherein said fluid-pressure actuated means comprises a control housing fixed relative to the valve body, said housing having an open-ended piston chamber one end of which is in communication with the aforesaid opposite end of the passageway bore; a piston reciprocable within said piston chamber movable from a normally retracted position, to an advanced position in closing relationship with said passageway bore; a bleed duct in said housing conveying to atmosphere the fluid escaping from said passageway bore when the piston is retracted; and means for directing an actuating fluid against an end of said piston for shifting said piston to the advanced position.
Claim 15
Dependent Claim
270 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said oriFice, an end head of the spool closing the booster duct and terminating flow of secondary fluid therethrough whenever said end head of the spool is in close proximity to the constricted orifice, including fluid-pressure actuated means for selectively closing the bleed opening.
Claim 16
Dependent Claim
270 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said oriFice, an end head of the spool closing the booster duct and terminating flow of secondary fluid therethrough whenever said end head of the spool is in close proximity to the constricted orifice, including fluid-pressure actuated means for selectively closing the bleed opening.
Claim 17
Dependent Claim
111 words
The valve as specified by claim 13, wherein said fluid-pressure actuated means comprises a control housing fixed relative to the valve body, said housing having an open-ended piston chamber one end of which is in communication with the aforesaid opposite end of the passageway bore; a piston reciprocable within said piston chamber movable from a normally retracted position, to an advanced position in closing relationship with said passageway bore; a bleed duct in said housing conveying to atmosphere the fluid escaping form said passageway bore when the piston is retracted; and means for directing an actuating fluid against an end of said piston for shifting said piston to the advanced position.
Claim 18
Dependent Claim
271 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said orifice, and a booster duct for directing fluid under pressure from the secondary passageway system to that body bore end which is supplied through said constricted orifice, the secondary passageway system being supplied with pressured fluid shunted from one of the primary passageways aforesaid.
Claim 19
Dependent Claim
271 words
A fluid control valve comprising in combination: a body having an elongate body bore, and a plurality of passageways terminating in said bore and adapted to convey a pressured primary operating fluid between said bore and a machine to be activated by said fluid; an elongate valve spool reciprocable in said body bore, said spool having opposite end faces and end heads, and a plurality of voids intermediate said heads for placing different ones of said passageways in fluid intercommunication with one another upon shifting of the valve spool to opposite ends of the body bore; the valve body having a secondary passageway system, means for introducing a fluid under pressure constantly to said secondary passageway system, said secondary passageway system including an open end passageway bore having at one end thereof a constricted orifice for establishing a secondary fluid pressure in the body bore and against one end face of the valve spool, the opposite end of said passageway bore being open so as to bleed secondary fluid constantly to atmosphere from said secondary passageway system; said bleed opening being selectively closable to produce a pressure buildup in that body bore end which is supplied with secondary fluid through said constricted orifice, for augmenting pressure of fluid upon said one end face of the valve spool, to enforce shifting of the valve spool away from said orifice, and a booster duct for directing fluid under pressure from the secondary passageway system to that body bore end which is supplied through said constricted orifice, the secondary passageway system being supplied with pressured fluid shunted from one of the primary passageways aforesaid.
Claim 20
Dependent Claim
173 words
A fluid control valve comprising in combination: a spool valve including a body having a valve-spool bore extending therethrough; an elongate valve spool reciprocable in said bore and having opposite end faces; a spool actuator secured to and carried by opposite ends of said body, said actuators each including a booster block having an open-ended piston chamber one end of which is in communication with an end of said body bore; a piston in said chamber having a forward face in abutting relationship with an end face of said spool; said piston having a diameter substantially greater than said valve spool, a pressure chamber for the continuous reception of fluid media under pressure in open communication with a rear face of said piston and also vented to the atmosphere, whereby restriction or interruption of the flow of fluid media through said vent will divert all of the fluid media within said chamber against the rear face of the piston for shifting said piston and the spool to the other end of its stroke.
Claim 21
Dependent Claim
173 words
A fluid control valve comprising in combination: a spool valve including a body having a valve-spool bore extending therethrough; an elongate valve spool reciprocable in said bore and having opposite end faces; a spool actuator secured to and carried by opposite ends of said body, said actuators each including a booster block having an open-ended piston chamber one end of which is in communication with an end of said body bore; a piston in said chamber having a forward face in abutting relationship with an end face of said spool; said piston having a diameter substantially greater than said valve spool, a pressure chamber for the continuous reception of fluid media under pressure in open communication with a rear face of said piston and also vented to the atmosphere, whereby restriction or interruption of the flow of fluid media through said vent will divert all of the fluid media within said chamber against the rear face of the piston for shifting said piston and the spool to the other end of its stroke.
Claim 22
Dependent Claim
27 words
A valve as specified by claim 16, wherein the diameter of said pistons is at least 20 percent greater than the diameter of the valve-spool receptive bore.
Claim 23
Dependent Claim
73 words
A valve as specified by claim 16, wherein the said piston chambers include a latching groove, said groove disposed relative to the oveRall travel of the piston in said chamber whereby to be placed in open communication with the piston chamber and the rear face of said piston when the piston is fully advanced toward the valve body, and whereby to be closed from communication with said chamber when said piston is retracted.
Claim 24
Dependent Claim
27 words
A valve as specified in claim 18, which includes means for continuously supplying fluid media under pressure to the latching groove of each of said piston chambers.
Claim 25
Dependent Claim
37 words
A valve as specified in claim 19, wherein the presence of fluid media under pressure against the rear face of the piston holds the spool at the opposite end of its stroke against accidental or unintentional displacement.
Claim 26
Dependent Claim
23 words
A valve as specified in claim 16, which includes an atmospheric vent for that portion of the piston chamber adjacent the valve body.
Claim 27
Dependent Claim
28 words
A valve as specified in claim 16, which includes a drain line for the outer end of the body bore and the adjacent end of the piston chamber.
Claim 28
Dependent Claim
31 words
A valve as specified in claim 16, wherein that end of the piston chamber adjacent the valve body is provided with a sump chamber, and a drain line in communication therewith.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |