US3661295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion relief valve
Assignee: Hoerbiger Ventilwerke GmbH and Co KG
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Filing: 1970-03-12
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Granted: 1972-05-09
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Expires: 1990-03-12
Abstract
Abstract An explosion relief valve for use especially to be applied to a crankcase of internal combustion engines and consisting of a spring loaded closing plate built into a limiting wall of the crankcase and having a flame barrier in the form of stacked metal strips cooperating with the valve seat.
Inventors
- 👤 Eduard Grunwald
- 👤 Walter J Tuymer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:44
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0413; F02; F02B; F02B77/00; F02B77/08; F02B77/10; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4323; F02M2700/4326
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
Explosion relief valve for closed spaces, especially for the crankcase of internal combustion engines, comprising a valve seat built into a limiting wall of the space that is to be protected, a spring-loaded closing plate cooperating with said valve seat, and a flame barrier built into the path of gas leading through the valve seat and consisting of a structure having a large number of openings, the flame barrier being composed of stacked metal strips having corrugated sections at least in part over at least a part of their width, the corrugated sections being composed as individual undulations developed irregularly, whereby they have varying heights and widths so that at least one part of the troughs of the waves of a metal strip rest on the crests of the waves of the metal strip below it.
Claim 2
Dependent Claim
136 words
Explosion relief valve for closed spaces, especially for the crankcase of internal combustion engines, comprising a valve seat built into a limiting wall of the space that is to be protected, a spring-loaded closing plate cooperating with said valve seat, and a flame barrier built into the path of gas leading through the valve seat and consisting of a structure having a large number of openings, the flame barrier being composed of stacked metal strips having corrugated sections at least in part over at least a part of their width, the corrugated sections being composed as individual undulations developed irregularly, whereby they have varying heights and widths so that at least one part of the troughs of the waves of a metal strip rest on the crests of the waves of the metal strip below it.
Claim 3
Dependent Claim
32 words
Explosion relief valve according to claim 1, in which the corrugations comprise undulations starting out from the inside edge of the metal strips and extending, at the most, over half its width.
Claim 4
Dependent Claim
29 words
Explosion relief valve according to claim 1, in which the height of the corrugated sections decreases continuously radially toward the outside from the inside edge of the metal strips.
Claim 5
Dependent Claim
117 words
Explosion relief valve according to claim 1, in which spring loading for the plate comprises a compression spring supported by a catcher developed as a cover metal sheet, the catcher being held at a distance from the valve seat by spacer bolts arranged at the edge of the closing plate, the metal strips representing the flame barrier being formed by sections of a continuous band having irregularly developed undulations and lying one on top of the other, said band being wound in the shape of a helix around an axis running perpendicularly in relation to its plane and being arranged concentrically around the spacer bolts and held firmly by clamping between the valve seat and the catcher.
References Cited (Backward Citations)
DE241925C
Cited
US723111A
Cited
US1134838A
Cited
US1240682A
Cited
US1799565A
Cited
US1800977A
Cited
US1983417A
Cited
US2152422A
Cited
US2160684A
Cited
US2821991A
Cited
US3016913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |