US4114907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient metal gasket
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1977-09-02
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Granted: 1978-09-19
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Expires: 1997-09-02
Abstract
Abstract Flexible annular joint having on the one hand a central core constituted by a helical spring made from metal wire with contiguous coils, which is closed on itself and in the inoperative state has the shape of a continuous ring, and on the other hand at least one envelope surrounding the central core and having in the inoperative state a cross-section formed by a curve which is not closed on itself. The internal helical spring comprises at least one continuous wire whose cross-section is a circular segment whose angle at the center is between 180° and 360°, the chord of said segment producing the outer surface of said spring.
Inventors
- 👤 Claude Abbes
- 👤 Andre Gournier
- 👤 Christian Rouaud
- 👤 Raymond DE Villepoix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:25
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/18; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F16J15/0893; F16L23/20; Y; Y10; Y10S; Y10S285/00; Y10S285/917
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A resilient metal gasket comprising a central core formed by a helical spring of metal wire with continguous coils closed on itself and in the inoperative state being a continuous ring, at least one envelope surrounding said central core and having in the inoperative state a cross-section formed by a curve including a gap, said internal helical spring comprising at least one continuous wire whose cross-section is a circular segment having an angle at the centre at least equal to 180° and less than 360°, a chord of said segment producing an outer surface of said spring.
Claim 2
Dependent Claim
97 words
A resilient metal gasket comprising a central core formed by a helical spring of metal wire with continguous coils closed on itself and in the inoperative state being a continuous ring, at least one envelope surrounding said central core and having in the inoperative state a cross-section formed by a curve including a gap, said internal helical spring comprising at least one continuous wire whose cross-section is a circular segment having an angle at the centre at least equal to 180° and less than 360°, a chord of said segment producing an outer surface of said spring.
Claim 3
Dependent Claim
35 words
A gasket according to claim 1, wherein the circlar segment section of the wire constituting the internal spring is obtained prior to making the spring by rolling or drawing a wire with a circular cross-section.
Claim 4
Dependent Claim
29 words
A gasket according to claim 1, wherein the circular segment section of the wire constituting the interal spring is obtained after coiling of the spring by grinding or truing.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |