US3921986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Elliott Turbomachinery Co Inc
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Filing: 1974-07-10
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Granted: 1975-11-25
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Expires: 1994-07-10
Abstract
Abstract A shaft seal assembly having an annular collar affixed to the shaft and arranged to rotate therewith, a nonrotatable sleeve encompassing the shaft being biased axially towards the collar and a free-floating carbon seal interposed therebetween. The assembly further includes a contact ring loosely positioned within a recess formed within the rotating collar and having a sealing surface adapted to ride in face-to-face sealing contact against the carbon ring. The contact ring is resiliently supported within the recess providing the assembly with sufficient flexibility to allow for shaft run-out without disturbing the integrity of the face-to-face sealing contact. Further means are provided to continually pass a flow of cooling fluid over the contact ring and the sealing ring to prevent excessive heating of the coacting sealing components.
Inventors
- 👤 Carl H Geary
- 👤 Owen S Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:52
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
In a shaft seal assembly having an annular member affixed to the shaft for rotation therewith, a sleeve encompassing the shaft and being biased axially towards said annular member and a freefloating sealing ring interposed between the annular member and the sleeve to prevent a pressurized working substance from leaking about said shaft, the improvement comprising a contact ring mounted within an annular recess formed in the rotating annular member and having a substantially radial sealing surface arranged to ride in face-to-face contact with a coacting surface on the sealing ring, at least one annular sealing gasket formed of a resilient material mounted within a circumferential groove formed in the contact ring and being arranged to seat against the rear wall and one side wall of the recess formed in the annular member for maintaining said face-to-face contact between the contact ring and the sealing ring independent of the position of the annular member, at least one aperture passing through the rear wall of said annular member and said contact ring to define a flow path over which cooling fluid in capable of moving into contact with said free-floating sealing ring, and means for bringing a cooling fluid to said aperture whereby the cooling fluid is pumped through said flow path under the influence of the rotating annular member into contact with the free-floating sealing bushing.
Claim 2
Dependent Claim
226 words
In a shaft seal assembly having an annular member affixed to the shaft for rotation therewith, a sleeve encompassing the shaft and being biased axially towards said annular member and a freefloating sealing ring interposed between the annular member and the sleeve to prevent a pressurized working substance from leaking about said shaft, the improvement comprising a contact ring mounted within an annular recess formed in the rotating annular member and having a substantially radial sealing surface arranged to ride in face-to-face contact with a coacting surface on the sealing ring, at least one annular sealing gasket formed of a resilient material mounted within a circumferential groove formed in the contact ring and being arranged to seat against the rear wall and one side wall of the recess formed in the annular member for maintaining said face-to-face contact between the contact ring and the sealing ring independent of the position of the annular member, at least one aperture passing through the rear wall of said annular member and said contact ring to define a flow path over which cooling fluid in capable of moving into contact with said free-floating sealing ring, and means for bringing a cooling fluid to said aperture whereby the cooling fluid is pumped through said flow path under the influence of the rotating annular member into contact with the free-floating sealing bushing.
Claim 3
Dependent Claim
58 words
The seal assembly of claim 1 wherein the inner ends of said contact ring facing the rear wall of the recess in the annular member are formed with a pair of circumferentially extending concentrically spaced grooves, said grooves each containing a resilient member contacting the radial end wall of said recess and one axially extended side wall thereof.
Claim 4
Dependent Claim
26 words
The seal assembly of claim 1 having a plurality of circumferentially spaced apertures passing through the rear wall of said annular member and said contact ring.
References Cited (Backward Citations)
US2679412A
Cited
US3035841A
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US2999702A
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US3250539A
Cited
US3547452A
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US3589738A
Cited
US3612548A
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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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |