US4409185A
Expired / Lapsed
US
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Safety device for packagings which contain hydrogen emitting pyrophoric metallic catalysts
Assignee: Evonik Operations GmbH
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Filing: 1981-10-14
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Granted: 1983-10-11
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Expires: 2001-10-14
Abstract
Abstract The object of the invention is a safety device for packagings which contain pyrophoric metallic catalysts that emit hydrogen. The apparatus consists of a hollow stopper, open upward, in the bottom of which a pressure relief valve is fitted, an oxidation catalyst arranged in the stopper, and a gas-permeable closure covering the upper side of the stopper.
Inventors
- 👤 Helmfried Krause
- 👤 Hubertus Wobbermin
- 👤 Edgar Geigle, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:50
CPC Classifications
B; B65; B65D; B65D51/00; B65D51/24; B65D51/28; B65D81/00; B65D81/24; B65D81/26; B65D81/266; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
A safety device for packagings which contain hydrogen emitting pyrophoric metallic catalysts, comprising a hollow, upwardly open stopper (1) containing a cavity provided with sealing means (2) in the bottom (8) of which is arranged valve means (3) for pressure relief, comprising a mushroom-shaped valve insert of elastic material (6), having a stem and a cap, the stem of which is passed through a bore opening in the stopper bottom (8) and has, beneath the stopper bottom, a thickening constructed as a stop which builds up stress, and the cap of which covers at least one gas throughflow opening (7) at the upper side of the stopper bottom, the distance between the thickening and the cap shoulder being somewhat smaller than the thickness of the stopper bottom, wherein said cavity of the stopper is filled with a catalyst (4) for recombination of hydrogen and oxygen from the air and is closed by a gas-permeable cover (5) connected to the upper edge of the stopper.
Claim 2
Dependent Claim
164 words
A safety device for packagings which contain hydrogen emitting pyrophoric metallic catalysts, comprising a hollow, upwardly open stopper (1) containing a cavity provided with sealing means (2) in the bottom (8) of which is arranged valve means (3) for pressure relief, comprising a mushroom-shaped valve insert of elastic material (6), having a stem and a cap, the stem of which is passed through a bore opening in the stopper bottom (8) and has, beneath the stopper bottom, a thickening constructed as a stop which builds up stress, and the cap of which covers at least one gas throughflow opening (7) at the upper side of the stopper bottom, the distance between the thickening and the cap shoulder being somewhat smaller than the thickness of the stopper bottom, wherein said cavity of the stopper is filled with a catalyst (4) for recombination of hydrogen and oxygen from the air and is closed by a gas-permeable cover (5) connected to the upper edge of the stopper.
Claim 3
Dependent Claim
16 words
A safety device as defined in claim 1, wherein said stopper is a screw threaded stopper.
Claim 4
Dependent Claim
27 words
A safety device according to claims 1 or 2, wherein at least the upper side of the stopper bottom (8) is covered with gas-permeable heat-protective foil (9).
Claim 5
Dependent Claim
36 words
A safety device according to claims 1 or 2, wherein the stopper (1) consists of thermoplastic material and its cover (5) consists of metallic sieve fabric which is welded into the upper edge of the stopper.
Claim 6
Dependent Claim
30 words
A safety device according to claims 1 or 2, wherein the stopper covering is surrounded at a spacing by a hood (10), as a protection against rainwater or splashed water.
Claim 7
Dependent Claim
17 words
A safety device according to claims 1 or 2, wherein the catalyst consists of shaped bulk material.
Claim 8
Dependent Claim
23 words
A safety device according to claims 1 or 2, wherein the catalyst comprised gamma-alumina carrier having applied thereto a platinum group metal component.
Claim 9
Dependent Claim
23 words
A safety device according to claims 1 or 2, wherein the catalyst comprises of a gamma-alumina carrier having applied thereto palladium and/or platinum.
Claim 10
Dependent Claim
25 words
A safety device according to claims 1 or 2, wherein the catalyst comprises a gamma-alumina carrier with a specific surface of 50-400 m 2 /g.
Claim 11
Dependent Claim
25 words
A safety device according to claims 1 or 2, wherein the catalyst comprises a gamma-alumina carrier having a specific surface of 80-350 m 2 /g.
Claim 12
Dependent Claim
26 words
A safety device according to claims 1 or 2, wherein the catalyst comprises a gamma-alumina carrier having a specific surface of about 250 m 2 /g.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |