US4226919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen/oxygen fuel cell
Assignee: Siemens AG
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Filing: 1979-08-08
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Granted: 1980-10-07
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Expires: 1999-08-08
Abstract
Abstract The present invention relates to hydrogen/oxygen fuel cells having oxygen and hydrogen feed lines for the flow of hydrogen and oxygen gases into the fuel cell, each of which is provided with a diaphragm valve for regulating the flow of gases therethrough, and each having control lines for controlling each diaphragm, the fuel cell also having the oxygen control line connected to the hydrogen feed line, and having an oxygen control valve positioned in the oxygen control line, to regulate the flow of hydrogen gas therethrough.
Inventors
- 👤 Botho Stuwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:11
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04082; H01M8/04089; H01M8/04104; H01M8/04223; H01M8/04228; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
218 words
In an improved hydrogen/oxygen fuel cell of the type having a hydrogen gas feed line connected to said cell for the flow of hydrogen gas into said cell, and having an oxygen gas feed line connected to said cell for the flow of oxygen gas into said cell, said hydrogen gas feed line including a hydrogen diaphragm valve positioned therein which controls the flow of hydrogen gas into said cell, with a hydrogen control line for controlling said hydrogen diaphragm valve and a hydrogen control valve for opening and closing said hydrogen control line, and in which said oxygen feed line includes an oxygen diaphragm valve positioned therein which controls the flow of oxygen gas into said cell, with an oxygen control line for controlling said oxygen diaphragm valve, said improvement comprises: a connection of said oxygen control line to said hydrogen feed line at a point upstream of said hydrogen diaphragm valve, and a downstream of the connection of said hydrogen feed line to said cell, which provides fluid communication between said oxygen control line and said hydrogen feed line; oxygen control valve positioned in said oxygen control line for opening and closing said oxygen control line; wherein the opening pressure of said oxygen diaphragm valve is higher than the opening pressure of said hydrogen diaphragm valve.
Claim 2
Dependent Claim
218 words
In an improved hydrogen/oxygen fuel cell of the type having a hydrogen gas feed line connected to said cell for the flow of hydrogen gas into said cell, and having an oxygen gas feed line connected to said cell for the flow of oxygen gas into said cell, said hydrogen gas feed line including a hydrogen diaphragm valve positioned therein which controls the flow of hydrogen gas into said cell, with a hydrogen control line for controlling said hydrogen diaphragm valve and a hydrogen control valve for opening and closing said hydrogen control line, and in which said oxygen feed line includes an oxygen diaphragm valve positioned therein which controls the flow of oxygen gas into said cell, with an oxygen control line for controlling said oxygen diaphragm valve, said improvement comprises: a connection of said oxygen control line to said hydrogen feed line at a point upstream of said hydrogen diaphragm valve, and a downstream of the connection of said hydrogen feed line to said cell, which provides fluid communication between said oxygen control line and said hydrogen feed line; oxygen control valve positioned in said oxygen control line for opening and closing said oxygen control line; wherein the opening pressure of said oxygen diaphragm valve is higher than the opening pressure of said hydrogen diaphragm valve.
Claim 3
Dependent Claim
48 words
In a fuel cell according to claim 1, wherein a pressure line to an electrolyte regenerator is connected by a reducing valve to the oxygen control line at a point between the oxygen control valve and the connection of the oxygen control line to the hydrogen feed line.
Claim 4
Dependent Claim
61 words
In a fuel cell according to claim 1 or 2, wherein a connecting line having at least one valve positioned therein said connecting line providing fluid communication between the hydrogen feed line at the point where said hydrogen feed line exits the fuel cell, and the oxygen feed line at the point where said oxygen feed line enters the fuel cell.
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) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |