US3872874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety device for limiting the pressure of a fluid
Assignee: Electricite de France SA
•
Filing: 1973-07-06
•
Granted: 1975-03-25
•
Expires: 1993-07-06
Abstract
Abstract The safety device comprises a hollow modular element which is open at both ends, a deformable diaphragm mounted as a shutter for closing-off one end of the element and having a convex face directed towards the interior of said element, an axial progressive-shearing cutter placed near the convex surface and secured to a removable structure which is mounted on the modular element at the end remote from the diaphragm, and sealing and coupling means at each end of the element.
Inventors
- 👤 Joseph Marie Nedelec
- 👤 Philippe Buffet
- 👤 Alain Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:05
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/40; F16K17/403; F16K17/02; F16K17/14; F16K17/16; F16K17/162; F16K17/1626; Y; Y02; Y02E; Y02E30/00; Y02E30/10; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1759
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A safety device for limiting the pressure of a fluid within a vessel or duct to a predetermined value wherein said device comprises in combination: a hollow modular element which is open at both ends, a preformed spherical segment non-reversing metallic diaphragm mounted as a shutter for closing off one end of the hollow element and having a convex surface directed towards the interior of said element, an axial progressive-shearing cutter placed in the proximity of said surface and secured to a removable structure which is mounted on the other end of the hollow element, sealing and coupling means suited to each end of the modular element and said structure including radial arms locked by strengthening ring in the internal wall of the modular element and, a central hub joining said arms together and mounting said cutter.
Claim 2
Dependent Claim
137 words
A safety device for limiting the pressure of a fluid within a vessel or duct to a predetermined value wherein said device comprises in combination: a hollow modular element which is open at both ends, a preformed spherical segment non-reversing metallic diaphragm mounted as a shutter for closing off one end of the hollow element and having a convex surface directed towards the interior of said element, an axial progressive-shearing cutter placed in the proximity of said surface and secured to a removable structure which is mounted on the other end of the hollow element, sealing and coupling means suited to each end of the modular element and said structure including radial arms locked by strengthening ring in the internal wall of the modular element and, a central hub joining said arms together and mounting said cutter.
Claim 3
Dependent Claim
31 words
A device according to claim 1, wherein the diaphragm has a peripheral annular flange which is securely attached to a strengthening ring and to the corresponding end of the modular element.
Claim 4
Dependent Claim
30 words
A device according to claim 2, wherein the annular flange of the diaphragm, the attached strengthening ring and the corresponding end of the modular element are joined together by welding.
Claim 5
Dependent Claim
63 words
A device according to claim 1, wherein the cutter has an oblique cutting face having a rake angle which determines a punctual cutting edge and a perimeter providing a shearing action on the diaphragm along the periphery of said cutting edge as the tearing of said diaphragm takes place, the cutter being a hollow cylinder open on the side of the cutting edge.
Claim 6
Dependent Claim
38 words
A device according to clAim 4, wherein the distance between the punctual cutting edge of the cutter and the convex surface of the diaphragm is adjustable by means of an axial displacement of the cutter within the hub.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |