US3917294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible annular seal
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1974-05-07
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Granted: 1975-11-04
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Expires: 1994-05-07
Abstract
Abstract The annular seal comprises a core consisting of a helical spring of wire with contiguous turns under high axial compressive stress and having the shape of a torus in the state of rest, a first sheath of hard and resilient metal which surrounds the spring and has in the state of rest the shape of a toric surface having a generating circle which is not completely closed, a second sheath of ductile metal which surrounds the first sheath and also has in the state of rest the shape of a toric surface whose generating circle has a break in continuity, and a rigid metallic reinforcement strip mounted against the spring inside the first sheath.
Inventors
- 👤 Claude Abbes
- 👤 Jean Fages
- 👤 Georges Mengus
- 👤 Christian Rouaud
- 👤 Villepoix Raymond De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0887; F16J15/0893
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
An annular seal according to claim 1, wherein the rigid reinforcement strip is mounted inside the spring.
Claim 2
Dependent Claim
17 words
An annular seal according to claim 1, wherein the rigid reinforcement strip is mounted outside the spring.
Claim 3
Dependent Claim
14 words
An annular seal according to claim 1, wherein the rigid reinforcement strip is continuous.
Claim 4
Dependent Claim
14 words
An annular seal according to claim 1, wherein the rigid reinforcement strip is non-continuous.
Claim 5
Dependent Claim
39 words
An annular seal according to claim 1, wherein the rigid reinforcement strip has a diameter which is smaller than the diameter of the spring and a thickness which is compatible with the desired displacement of said spring in compression.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |