US3847062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plunger and cylinder arrangement
Assignee: MESTA ENGINEERING COMPANY APARTNERSHIP OF PA
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Filing: 1971-12-27
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Granted: 1974-11-12
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Expires: 1991-12-27
Abstract
Abstract A fluid-bearing plunger and cylinder arrangement comprises a cylinder, a plunger member closely fitted within the cylinder for reciprocation therein, said cylinder defining a pressure chamber therein for actuating the plunger, a plurality of pressure recesses formed on one of the plunger member and the cylinder at a location removed from the chamber, and a pair of exhaust grooves formed on one of the cylinder and the plunger member and axially spaced one on each side of the pressure recesses. The recesses circumferentially surround the member and in addition are substantially equally spaced from one another. The grooves circumferentially and continuously surround the plunger member, and one of the grooves is disposed between the pressure recesses and the chamber. Means are provided for supplying a pressurized fluid to each of the recesses and for conveying from the exhaust grooves any fluid collected therein. In other applications of the invention flow restricting means are provided for accurately metering individual flows into said pressure recesses respectively.
Inventors
- 👤 J Sutyak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:42
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; B; B21; B21B; B21B31/00; B21B31/16; B21B31/20; B21B31/32; F16C29/00; F16C29/02; F16C29/025; F16J; F16J10/00; F16J10/02; B21B2203/00; B21B2203/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
274 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of discrete pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said inner housing surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one of each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, and conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, each of said pressure recesses being ciRcumferentially spaced from adjacent recesses and axially spaced from said exhaust grooves to an extent that the fluid resistance of surrounding first interfacial areas of said member and said housing establish an essentially hydrostatic pressure condition in said recesses, said first interfacial areas extending uninterruptedly between adjacent one of said pressure recesses and uninterruptedly between said recesses and said exhaust grooves, said plunger member extending beyond said one groove and toward said chamber so that second interfacial areas of said member and said housing between said chamber and said one groove effectively isolate said one groove from said chamber, said second interfacial areas and said one groove interrupting any leakage from said pressure chamber to said first interfacial areas and said pressure recesses.
Claim 2
Dependent Claim
274 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of discrete pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said inner housing surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one of each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, and conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, each of said pressure recesses being ciRcumferentially spaced from adjacent recesses and axially spaced from said exhaust grooves to an extent that the fluid resistance of surrounding first interfacial areas of said member and said housing establish an essentially hydrostatic pressure condition in said recesses, said first interfacial areas extending uninterruptedly between adjacent one of said pressure recesses and uninterruptedly between said recesses and said exhaust grooves, said plunger member extending beyond said one groove and toward said chamber so that second interfacial areas of said member and said housing between said chamber and said one groove effectively isolate said one groove from said chamber, said second interfacial areas and said one groove interrupting any leakage from said pressure chamber to said first interfacial areas and said pressure recesses.
Claim 3
Dependent Claim
19 words
The combination according to claim 1 wherein said recesses are elongated and are disposed in circumferentially spaced end-to-end relation.
Claim 4
Dependent Claim
16 words
The combination according to claim 1 wherein said exhaust grooves are equally spaced from said recesses.
Claim 5
Dependent Claim
28 words
The combination according to claim 1 wherein flow restricting means for each of said pressure recesses are mounted respectively in ducts for said recesses formed in said housing.
Claim 6
Dependent Claim
64 words
The combination according to claim 1 wherein an expandable piston ring is mounted on said plunger member between said pressure chamber and said one exhaust groove, and fluid means are provided for expanding said piston ring, said fluid means including a branched duct extending within said plunger member to several points about said ring and flow restricting means in each of the duct branches.
Claim 7
Dependent Claim
35 words
The combination according to claim 1 wherein a plurality of outlet or exhaust ducts are coupled at spaced locations to each of said grooves in avoidance of pressure build-up and differential pressures within said grooves.
Claim 8
Dependent Claim
178 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said inner housing surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, and ducts for said recesses coupled to an intake manifold formed in a balnk end portion of said housing, the major portion of said ducts extending from said manifold through a wall of said housing.
Claim 9
Dependent Claim
178 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said inner housing surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, and ducts for said recesses coupled to an intake manifold formed in a balnk end portion of said housing, the major portion of said ducts extending from said manifold through a wall of said housing.
Claim 10
Dependent Claim
172 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of pressure recesses formed on one of said plunger member, and said housing, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in one of said plunger member and said housing and axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, and exhaust ducts for said grooves coupled to an exhaust manifoLd formed in a blank end portion of said housing, said exhaust ducts extending to said manifold through one of said plunger and a wall of said housing.
Claim 11
Dependent Claim
172 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of pressure recesses formed on one of said plunger member, and said housing, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in one of said plunger member and said housing and axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, and exhaust ducts for said grooves coupled to an exhaust manifoLd formed in a blank end portion of said housing, said exhaust ducts extending to said manifold through one of said plunger and a wall of said housing.
Claim 12
Dependent Claim
72 words
The combination according to claim 1 including at least one additional array of said pressure recesses being similarly formed and spaced along the length of said plunger member from the first-mentioned array of said recesses, and an additional exhaust groove similarly disposed on the outer side of said additional array, the additional fluid bearing system thus formed minimizing or preventing altogether canting or cocking of said plunger member relative to said housing.
Claim 13
Dependent Claim
173 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of discrete pressure recesses formed on one of said plunger member and said housing, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in one of said plunger member and said housing and axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, said housing being enlarged and spaced from said plunger member, and a liner member closely fitted within the space between said plunger member and said housing, said conduit means being extended through said housing and said liner member.
Claim 14
Dependent Claim
173 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger member, a plurality of discrete pressure recesses formed on one of said plunger member and said housing, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in one of said plunger member and said housing and axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, said housing being enlarged and spaced from said plunger member, and a liner member closely fitted within the space between said plunger member and said housing, said conduit means being extended through said housing and said liner member.
Claim 15
Dependent Claim
38 words
The combination according to claim 10 wherein a circumferential extension of said duct means is formed on one of said liner member and said housing in compensation for circumferential displacement of said liner member relative to said housing.
Claim 16
Dependent Claim
266 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger, a plurality of discrete pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said housing inner surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said pressure chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, each of said pressure recesses being circumferentially spaced from adjacent recesses and axially spaced from said exhaust grooves such that the fluid resistance of the surrounding interfacial areas of said plunger member and of said housing at least aid in establishing an essentially hydrostatic pressure condition in said recesses, said one groove interrupting any leakage from said pressure chamber to said interfacial areas, said conduit means including a separate inlet duct coupled to each of said recesses, and discrete flow-restricting means coupled to said ducts respectfully, the respective configurations of said flow-restricting means and of said interfacial areas and of said grooves being structurally interrelated such that leakage from said pressure recesses is substantially less than the exhaust capability of said grooves.
Claim 17
Dependent Claim
266 words
A fluid bearing plunger and housing arrangement comprising a housing, a plunger member closely fitted within said housing for reciprocation therein, said housing defining a pressure chamber therein for actuating said plunger, a plurality of discrete pressure recesses formed in an inner surface of said housing and juxtaposed to said plunger member, said recesses circumferentially surrounding said plunger member and in addition being substantially equally spaced from one another, a pair of exhaust grooves formed in said housing inner surface and juxtaposed to said plunger member, said exhaust grooves being axially spaced one on each side of said recesses, said grooves circumferentially and continuously surrounding said plunger member, one of said grooves being disposed between said recesses and said pressure chamber, conduit means for supplying a pressurized fluid to each of said recesses and for conveying from said exhaust grooves any fluid collected therein, each of said pressure recesses being circumferentially spaced from adjacent recesses and axially spaced from said exhaust grooves such that the fluid resistance of the surrounding interfacial areas of said plunger member and of said housing at least aid in establishing an essentially hydrostatic pressure condition in said recesses, said one groove interrupting any leakage from said pressure chamber to said interfacial areas, said conduit means including a separate inlet duct coupled to each of said recesses, and discrete flow-restricting means coupled to said ducts respectfully, the respective configurations of said flow-restricting means and of said interfacial areas and of said grooves being structurally interrelated such that leakage from said pressure recesses is substantially less than the exhaust capability of said grooves.
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |