Patent US3799585A successfully refreshed from Google Patents.
US3799585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid joint
Assignee: Camco Drilling Group Ltd
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Filing: 1972-11-17
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Granted: 1974-03-26
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Expires: 1992-11-17
Abstract
Abstract In a rotary fluid joint, an improved sealing means for effecting a leakproof seal between a housing and a conduit rotably mounted therein, and comprising at least one pressure responsive seal carried by the housing in surrounding sealing relation to the conduit, a supply of a substantially non-compressible fluid communicating with the seal for transmitting a sealing pressure thereto for maintaining the desired sealing relation between the seal and the conduit, and pressurizing means communicating with the supply of pressure transmitting fluid and a bore in the housing and, responsive to the pressure of the fluid flowing through the bore, for applying a proportionally corresponding pressure to the pressure responsive seal through the supply of the pressure transmitting fluid.
Inventors
- 👤 F Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:59
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/10; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0824; F16L27/0828
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
In a rotary fluid joint, including a housing having a bore therethrough for the flow of a pressurized fluid therein, and a conduit rotatably mounted in said housing in communication with said bore for permitting the flow of the pressurized fluid therethrough, the combination therewith of sealing means for effecting a seal between said housing and conduit to substantially prevent leakage of pressurized fluid from therebetween, said sealing means comprising; a. at least one pressure responsive seal carried by said housing in surrounding sealing relation to said conduit, b. a substantially non-compressible fluid communicating with said seal for transmitting a sealing pressure thereto for maintaining the desired sealing relation between said seal and said conduit, and c. pressurizing means communicating with said pressure transmitting fluid and said bore in said housing, and responsive to the pressure of the fluid flowing through said bore for applying a proportionally corresponding pressure to said pressure responsive seal through said pressure transmitting fluid, whereby the sealing relation between said seal and said conduit is maintained without regard to pressure fluctuations in said bore.
Claim 2
Dependent Claim
179 words
In a rotary fluid joint, including a housing having a bore therethrough for the flow of a pressurized fluid therein, and a conduit rotatably mounted in said housing in communication with said bore for permitting the flow of the pressurized fluid therethrough, the combination therewith of sealing means for effecting a seal between said housing and conduit to substantially prevent leakage of pressurized fluid from therebetween, said sealing means comprising; a. at least one pressure responsive seal carried by said housing in surrounding sealing relation to said conduit, b. a substantially non-compressible fluid communicating with said seal for transmitting a sealing pressure thereto for maintaining the desired sealing relation between said seal and said conduit, and c. pressurizing means communicating with said pressure transmitting fluid and said bore in said housing, and responsive to the pressure of the fluid flowing through said bore for applying a proportionally corresponding pressure to said pressure responsive seal through said pressure transmitting fluid, whereby the sealing relation between said seal and said conduit is maintained without regard to pressure fluctuations in said bore.
Claim 3
Dependent Claim
33 words
A rotary fluid joint according to claim 1, wherein said housing includes a passageway communicating with said seal and said pressure responsive means, and wherein said substantially non-compressible fluid substantially fills said passageway.
Claim 4
Dependent Claim
20 words
A rotary fluid joint according to claim 2, wherein said pressurizing means comprises a piston slidably positioned within said passageway.
Claim 5
Dependent Claim
21 words
A rotary fluid joint according to claim 3, wherein a portion of said piston protrudes from said passageway into said bore.
Claim 6
Dependent Claim
34 words
A rotary fluid joint according to claim 4, including means limiting the protrusion of said piston into said bore for limiting the restriction by said piston of the flow of said pressurized fluid therethrough.
Claim 7
Dependent Claim
57 words
A rotary fluid joint according to claim 2, wherein said passageway extending through said housing communicates with the outside surface of said housing for the introduction of said substantially non-compressible fluid into said passageway and including plugging means normally positioned in said passageway for sealingly interrupting communicating of said passageway with the outside surface of said housing.
Claim 8
Dependent Claim
41 words
A rotary fluid joint according to claim 6, wherein said plugging means, when normally positioned in said passageway, pressurizes said substantially non-compressible fluid for transmitting a minimum sealing pressure to said sealing means without regard to the pressure within said bore.
Claim 9
Dependent Claim
55 words
A rotary fluid joint according to claim 2, wherein a portion of said passageway comprises an annular recess in said housing surrounding said conduit, and wherein said pressure responsive seal is positioned in said annular recess to form a reservoir for expansibly accommodating said sealing pressure for maintaining the desired sealing relation with said conduit.
Claim 10
Dependent Claim
74 words
A rotary fluid joint according to claim 2, wherein a portion of said passageway comprises an annular recess in said housing surrounding said conduit, and wherein a pair of said pressure responsive seals, each comprising an annular, substantially C-shaped resilient member, is positioned in opposing relation on opposite axial walls of said annular recess to form a reservoir therebetween for expansionably accommodating said sealing pressure for maintaining the desired sealing relation with said conduit.
Claim 11
Dependent Claim
69 words
A rotary fluid joint according to claim 9, wherein said housing has drainage means communicating with said recess and the outer surface of said housing for reducing the pressure on one side of said annular recess in relation to the other side thereof, thereby inducing the flow of any leakage from said pressurE responsive seals to the outer surface of said housing for facilitating visual detection of the leakage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |