US3716416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel metering device for fuel cell
Assignee: Engelhard Minerals and Chemicals Corp
•
Filing: 1971-05-20
•
Granted: 1973-02-13
•
Expires: 1991-05-20
Abstract
Abstract A fuel cell system designed for self-regulated power output at a predetermined level includes a capillary flow control device for throttling the fuel flow in response to the power output of the fuel cell.
Inventors
- 👤 O Adlhart
- 👤 P Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:46
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/06; H01M8/0606; H01M8/04; H01M8/04082; H01M8/04089; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0379
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
148 words
In a fuel cell system adapted to provide a predetermined power output and comprising a fuel cell having at least one fuel electrode to which a fuel is fed in a gaseous state, means for controlling the fuel feed to the system which comprises a capillary metal tubing having an inlet and an outlet and which receives pressurized liquid fuel and delivers a predetermined amount of gaseous fuel at ambient temperature to the fuel cell electrode to give the desired power output and means to regulate the temperature of said capillary tubing, the temperature regulating means comprising said capillary tubing electrically connected to the power output of the fuel cell; whereby increase in power output of the fuel cell above the predetermined amount causes the temperature of the capillary tubing to rise, thereby causing vaporization of the fuel and thus decreasing the fuel feed to the fuel electrode.
Claim 2
Dependent Claim
148 words
In a fuel cell system adapted to provide a predetermined power output and comprising a fuel cell having at least one fuel electrode to which a fuel is fed in a gaseous state, means for controlling the fuel feed to the system which comprises a capillary metal tubing having an inlet and an outlet and which receives pressurized liquid fuel and delivers a predetermined amount of gaseous fuel at ambient temperature to the fuel cell electrode to give the desired power output and means to regulate the temperature of said capillary tubing, the temperature regulating means comprising said capillary tubing electrically connected to the power output of the fuel cell; whereby increase in power output of the fuel cell above the predetermined amount causes the temperature of the capillary tubing to rise, thereby causing vaporization of the fuel and thus decreasing the fuel feed to the fuel electrode.
Claim 3
Dependent Claim
37 words
A fuel cell system according to claim 1 wherein the capillary tubing is an electrical resistor, thereby causing the temperature of the capillary tubing to be regulated in response to the power output of the fuel cell.
Claim 4
Dependent Claim
39 words
A fuel cell system of claim 1 wherein the outlet of the capillary tubing is connected to an auxiliary hydrogen generator having an effluent comprised of a H2-containing gas and said effluent is fed directly to said fuel electrode.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |