US4489754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief valve for containers
Assignee: Deutsche Babcock Anlagen AG
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Filing: 1982-09-29
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Granted: 1984-12-25
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Expires: 2002-09-29
Abstract
Abstract Pressure relief valve for containers, including a ferro-magnetic valve body having a hole formed therein and a sealing element for the hole, the sealing element being in the form of a disc-shaped permanent magnet having a side facing the hole formed in the valve body and an elastomer seal disposed on the side of the permanent magnet facing the hole, and a cap formed of synthetic material covering the valve.
Inventors
- 👤 Roland Seessle
- 👤 Werner Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:58
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/02; F16K31/06; F16K31/08; F16K17/00; F16K17/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
Pressure relief valve assembly for containers, comprising a valve including a ferro-magnetic valve body having a hole formed therein, a capillary tube disposed in said hole and extending over the entire length of said hole, and a sealing element for said hole, said sealing element being in the form of a disc-shaped permanent magnet having a side facing said hole formed in said valve body and an elastomer seal disposed on said side of said permanent magnet facing said hole, said disc-shaped permanent magnet being displaceable from a position symmetrical with said valve body by pressure applied to said capillary tube, said valve body having a sealing lip formed thereon facing said elastomer seal defining a surface portion of said valve body inside said sealing lip entirely covered by said elastomer seal, and a cap formed of synthetic material covering said valve, said cap being spaced a given distance from said disc-shaped permanent magnet retaining said disc-shaped permanent magnet in a position entirely covering said surface portion when displaced.
Claim 2
Dependent Claim
169 words
Pressure relief valve assembly for containers, comprising a valve including a ferro-magnetic valve body having a hole formed therein, a capillary tube disposed in said hole and extending over the entire length of said hole, and a sealing element for said hole, said sealing element being in the form of a disc-shaped permanent magnet having a side facing said hole formed in said valve body and an elastomer seal disposed on said side of said permanent magnet facing said hole, said disc-shaped permanent magnet being displaceable from a position symmetrical with said valve body by pressure applied to said capillary tube, said valve body having a sealing lip formed thereon facing said elastomer seal defining a surface portion of said valve body inside said sealing lip entirely covered by said elastomer seal, and a cap formed of synthetic material covering said valve, said cap being spaced a given distance from said disc-shaped permanent magnet retaining said disc-shaped permanent magnet in a position entirely covering said surface portion when displaced.
Claim 3
Dependent Claim
16 words
Pressure relief valve according to claim 1, wherein said elastomer seal is formed of acrylonitrile-butadiene rubber.
Claim 4
Dependent Claim
20 words
Pressure relief valve according to claim 1, wherein said cap is engaged in a groove formed in said valve body.
Claim 5
Dependent Claim
16 words
Pressure relief valve according to claim 1, wherein said hole has a diameter of 0.15 mm.
Claim 6
Dependent Claim
90 words
Pressure relief valve assembly for containers, comprising a valve including a ferro-magnetic valve body having a hole formed therein, a capillary tube disposed in said hole and extending over the entire length of said hole, and a sealing element for said hole, said sealing element being in the form of a disc-shaped permanent magnet having a side facing said hole formed in said valve body and an elastomer seal disposed on said side of said permanent magnet facing said hole, and a cap formed of synthetic material covering said valve.
Claim 7
Dependent Claim
90 words
Pressure relief valve assembly for containers, comprising a valve including a ferro-magnetic valve body having a hole formed therein, a capillary tube disposed in said hole and extending over the entire length of said hole, and a sealing element for said hole, said sealing element being in the form of a disc-shaped permanent magnet having a side facing said hole formed in said valve body and an elastomer seal disposed on said side of said permanent magnet facing said hole, and a cap formed of synthetic material covering said valve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |