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Patent US4068852A successfully refreshed from Google Patents.
US4068852A
Expired / Lapsed
US
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Seal ring
Assignee: Joint Francais SNC
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Filing: 1975-12-05
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Granted: 1978-01-17
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Expires: 1995-12-05
Abstract
Abstract Seal ring made of an elastomeric material intended to operate at a temperature at least equal to 150° C and to be in contact on its opposite sides with two mediums one of which at least is a medium emitting nuclear radiations and to be able to slide with a very slight friction coefficient in contact with a body which rotates and/or moves in a linear direction, comprising a body with an outer casing made of an elastomer which is resistant to heat and to nuclear radiations and has a low friction coefficient and with an inner casing made of a heat resisting elastomer, the outer and inner casings being closely welded to each other, the body being filled with a low-pressure gas and the inner casing being impermeable to the gas for filling the body. Application to seal rings for vessels in a radioactive medium.
Inventors
- 👤 Jacques Anglade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:07
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46; G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/073; G21C13/0735; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
Seal ring made of an elastomeric material intended to operate at a temperature at least equal to 150° C and to be in contact on its opposite sides with two gaseous fluids, one of which at least is a fluid emitting nuclear radiations, and to be able to slide with a very slight friction coefficient in contact with a body which rotates and/or moves in a linear direction, comprising an outer casing made of an elastomer which is resistant to heat and to nuclear radiations and has a low friction coefficient, an inner casing made of a heat resistant elastomer, and an intermediate casing closely welded to both said outer casing and said inner casing, said seal ring being filled with a gas at a relatively low pressure and said inner casing being impermeable to said gas.
Claim 2
Dependent Claim
137 words
Seal ring made of an elastomeric material intended to operate at a temperature at least equal to 150° C and to be in contact on its opposite sides with two gaseous fluids, one of which at least is a fluid emitting nuclear radiations, and to be able to slide with a very slight friction coefficient in contact with a body which rotates and/or moves in a linear direction, comprising an outer casing made of an elastomer which is resistant to heat and to nuclear radiations and has a low friction coefficient, an inner casing made of a heat resistant elastomer, and an intermediate casing closely welded to both said outer casing and said inner casing, said seal ring being filled with a gas at a relatively low pressure and said inner casing being impermeable to said gas.
Claim 3
Dependent Claim
16 words
Seal ring according to claim 1 wherein said outer casing is made of a silicon elastomer.
Claim 4
Dependent Claim
33 words
Seal ring according to claim 2 wherein said inner casing is made from an elastomer selected from the group consisting of butyl rubber, ethylene and propylene copolymer, and vinylidene fluoride and hexachloropropylene copolymer.
Claim 5
Dependent Claim
33 words
Seal ring according to claim 1 wherein said inner casing is made from an elastomer selected from the group consisting of butyl rubber, ethylene and propylene copolymer, and vinylidene fluoride and hexachloropropylene copolymer.
Claim 6
Dependent Claim
51 words
Seal ring according to claim 1, characterized in that it comprises, on one face, two lips intended to come into contact with the body which is liable to rotate and/or move in a linear direction and on the other face, a plane portion intended to be maintained in a stationery wall.
Claim 7
Dependent Claim
29 words
Seal ring according to claim 1, characterized in that said gas is the same as the gas of one of the mediums with which the seal is in contact.
References Cited (Backward Citations)
US2147771A
Cited
US2299734A
Cited
US2776154A
Cited
US2822192A
Cited
US2893060A
Cited
US3815926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |