Patent US3586015A successfully refreshed from Google Patents.
US3586015A
Expired / Lapsed
US
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Fuel tank vapor separator system having magnetic attitude sensing means
Assignee: Ford Motor Co
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Filing: 1970-01-22
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Granted: 1971-06-22
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Expires: 1990-01-22
Abstract
Abstract A magnetically actuated electric switch responsive to a liquid fuel sensing device and a switch responsive to a pressure device are connected in series with each other and with a solenoid valve controlling fluid flow through a conduit connected to the upper interior of the fuel tank. The solenoid valve opens only when tank pressure exceeds a predetermined minimum and the conduit opening is free of liquid fuel. A magnet that moves in response to fuel tank attitude acts on the magnetically actuated switch to prevent the valve from opening whenever tank attitude varies from normal tank attitude by some predetermined amount.
Inventors
- 👤 Ernest W Kitzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:41
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; B; B65; B65D; B65D90/00; B65D90/22; B65D90/32; B65D90/34; F02M2025/0845; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0777; Y10T137/0874; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/3099; Y10T137/7287; Y10T137/7358; Y10T137/7368
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
The system of claim 1 in which the liquid fuel sensing means includes a buoyant means mounted movably in the opening of the conduit, said buoyant means moving from a rest position to a buoyed position when liquid fuel is present at the conduit opening, a first magnetic means embedded in said buoyant means, the switch controlled by the liquid fuel sensing means being a normally open magnetically actuated reed switch located where the magnetic field of said first magnetic means closes said switch when the buoyant means is in its rest position, and the attitude means comprises a second magnetic means movable by said predetermined variation in tank attitude to a position where said reed switch is open regardless of the location of the first magnetic means.
Claim 2
Dependent Claim
29 words
The system of claim 2 in which said second magnetic means comprises a magnet slidably mounted in a passage adjacent the switch controlled by the liquid fuel sensing means.
Claim 3
Dependent Claim
70 words
The system of claim 3 in which the second magnetic means normally is positioned adjacent the switch controlled by the liquid fuel sensing means and is moved away from the switch when tank attitude exceeds said predetermined variation from normal attitude, the magnetic fields of said first and second magnetic means complementing each other to close the contacts of the switch only when both magnetic means are adjacent the switch.
Claim 4
Dependent Claim
44 words
The system of claim 4 in which the conduit opens into the tank a short distance below the tank roof to provide a vapor space within the tank adjacent the tank roof, and the liquid fuel sensing means is mounted in said conduit opening.
Claim 5
Dependent Claim
44 words
The system of claim 1 in which the conduit opens into the tank a short distance below the tank roof to provide a vapor space within the tank adjacent the tank roof, and the liquid fuel sensing means is mounted in said conduit opening.
References Cited (Backward Citations)
US3242937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |