US3592479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: Gits Bros Mfg Co
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Filing: 1969-03-05
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Granted: 1971-07-13
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Expires: 1989-03-05
Abstract
Abstract A shaft seal having a U-shaped cross section ring housing adapted to encircle the shaft, the ''''U'''' opening axially, a carbon nose member projecting from the open end and urged axially by a spring force, a J-shaped cross section secondary seal ring having the long leg thereof urged axially against the back side of the nose member within the housing and the bight thereof urged radially against the inner diameter wall of the housing, the secondary seal being positioned so as to be urged into greater sealing contact in dependent response to the pressure contained.
Inventors
- 👤 Raymond H Andresen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3464; F16J15/348
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
406 words
A shaft seal assembly comprising: a substantially U-shaped cross section ring housing having a backwall connecting inner and outer diameter walls, a primary seal member received in said housing having a portion thereof adapted to project from the open end of the housing into sealing engagement with a shaft-carried abutment, an axially extending circumferential wall on said primary seal member within said housing, said axially extending wall adjacent a radially extending circumferential wall on said primary seal member within said housing, a substantially J-shaped cross section secondary seal ring within said housing, said secondary seal ring having a substantially radially extending long leg, an axially extending flange at the outer diameter of said long leg, the outer diameter of said flange in circumferential engagement with the said axial wall, a first axial end of said flange normally in circumferential engagement with said radial wall, a second axial end of said flange having an angled radially and axially extending face, a ferrule in said housing having a portion thereof radially inward of a portion of said axial wall, said portion of said ferrule having an angled radially and axially extending face adapted to mate with the angled face of said flange, spring means urging said ferrule in an axial direction towards said flange, said angled faces effective to urge said flange outward against said axial wall and to normally urge said first axial end of said flange against said radial wall whereby a sealing interface is maintained between said primary and said secondary seals, said secondary seal having portions thereof in circumferential sealing engagement with the inner diameter wall of said housing, and said primary and secondary seal members axially movable within said housing while maintaining the sealing relationship with one another and with the inner diameter wall of the said housing, said primary and secondary seal members movable independently of one another in the housing, the said ferrule having an axial extension extending away from the open end of the said U-shaped cross section housing, the said axial extension of the ferrule dimensioned to bottom against the backwall of the U-shaped cross section housing with the said angled face remaining radially inwardly of the said axially extending wall of the said prImary seal member during normal operating conditions of the said seal assembly whereby the said flange of the said secondary seal is retained radially inwardly of the said axial wall of the said primary seal.
Claim 2
Dependent Claim
406 words
A shaft seal assembly comprising: a substantially U-shaped cross section ring housing having a backwall connecting inner and outer diameter walls, a primary seal member received in said housing having a portion thereof adapted to project from the open end of the housing into sealing engagement with a shaft-carried abutment, an axially extending circumferential wall on said primary seal member within said housing, said axially extending wall adjacent a radially extending circumferential wall on said primary seal member within said housing, a substantially J-shaped cross section secondary seal ring within said housing, said secondary seal ring having a substantially radially extending long leg, an axially extending flange at the outer diameter of said long leg, the outer diameter of said flange in circumferential engagement with the said axial wall, a first axial end of said flange normally in circumferential engagement with said radial wall, a second axial end of said flange having an angled radially and axially extending face, a ferrule in said housing having a portion thereof radially inward of a portion of said axial wall, said portion of said ferrule having an angled radially and axially extending face adapted to mate with the angled face of said flange, spring means urging said ferrule in an axial direction towards said flange, said angled faces effective to urge said flange outward against said axial wall and to normally urge said first axial end of said flange against said radial wall whereby a sealing interface is maintained between said primary and said secondary seals, said secondary seal having portions thereof in circumferential sealing engagement with the inner diameter wall of said housing, and said primary and secondary seal members axially movable within said housing while maintaining the sealing relationship with one another and with the inner diameter wall of the said housing, said primary and secondary seal members movable independently of one another in the housing, the said ferrule having an axial extension extending away from the open end of the said U-shaped cross section housing, the said axial extension of the ferrule dimensioned to bottom against the backwall of the U-shaped cross section housing with the said angled face remaining radially inwardly of the said axially extending wall of the said prImary seal member during normal operating conditions of the said seal assembly whereby the said flange of the said secondary seal is retained radially inwardly of the said axial wall of the said primary seal.
References Cited (Backward Citations)
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Cited
US2479968A
Cited
US2922668A
Cited
US2871039A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |