US3757987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent controlling gas cap with shut-off valve
Assignee: American Motors Corp
•
Filing: 1971-07-15
•
Granted: 1973-09-11
•
Expires: 1991-07-15
Abstract
Abstract A valve associated and assembled with a vent controlling arrangement in the closure cap of a fuel storage tank in a motor vehicle. The valve having a weighted member responsive to the influence of gravity to effect the opening and closing of the valve and accordingly the communication between the tank and vent controlling arrangement, the closing being when the tank is inverted to prevent fuel spillage.
Inventors
- 👤 C Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:02
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/04; B60K15/0406; Y; Y10; Y10S; Y10S220/00; Y10S220/33; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0874
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
In a closure cap for a normally upwardly extending tank filler neck, a filler neck closure member having a vent opening therein, valve housing means secured to said member and defining a vent passage open at one end to said vent opening, a first valve seat in said passage, a vent exhaust valve closable against said first seat, said exhaust valve having an aperture extending therethrough, a vent intake valve closable against said exhaust valve to block flow through said aperture, a second valve seat in said passage spaced from said first seat, a third valve closable against said second seat to block flow through said passage irrespective of closure of said exhaust and intake valves, and a movable weight operable against said third valve to cause closure thereof in response to inversion of the tank filler neck with the cap installed thereon.
Claim 2
Dependent Claim
143 words
In a closure cap for a normally upwardly extending tank filler neck, a filler neck closure member having a vent opening therein, valve housing means secured to said member and defining a vent passage open at one end to said vent opening, a first valve seat in said passage, a vent exhaust valve closable against said first seat, said exhaust valve having an aperture extending therethrough, a vent intake valve closable against said exhaust valve to block flow through said aperture, a second valve seat in said passage spaced from said first seat, a third valve closable against said second seat to block flow through said passage irrespective of closure of said exhaust and intake valves, and a movable weight operable against said third valve to cause closure thereof in response to inversion of the tank filler neck with the cap installed thereon.
Claim 3
Dependent Claim
48 words
In the closure cap of claim 1, said valve housing means comprising a housing having a shoulder forming said first valve seat and an end wall spaced from said shoulder, and including a spring interposed between said exhaust valve and end wall for biasing said exhaust valve closed.
Claim 4
Dependent Claim
45 words
In the closure cap of claim 2, said intake valve having a stem extending through said exhaust valve aperture, a retainer on the extended end of said stem, and a second spring interposed between said retainer and exhaust valve for biasing said intake valve closed.
Claim 5
Dependent Claim
64 words
In the closure cap of claim 3, said valve housing means including a valve body secured to said housing, said second seat being disposed in said valve body opposite said intake valve, said valve body defining a chamber loosely retaining said weight and having side walls extending between said chamber and second seat for slidably guiding opening and closing movements of said third valve.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |