US4028075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel tank cap
Assignee: Individual
•
Filing: 1976-11-02
•
Granted: 1977-06-07
•
Expires: 1996-11-02
Abstract
Abstract A cylindrical fuel cap having a first chamber filled with vapor absorbent material, a second chamber filled with air filtering material, and a one-way check valve for establishing communication between the atmosphere and the interior of the fuel cap is placed in a fuel inlet line of a fuel tank to trap fuel vapors in the tank preventing them from being emitted to pollute the atmosphere and to provide a fuel vapor reservoir for augmenting the fuel used for combustion in an internal combustion engine, oil burner, and the like, upon demand.
Inventors
- 👤 Emile Roberge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:20
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/04; B01; B01D; B01D53/00; B01D53/02; B60K15/035; B60K15/03504
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A fuel tank cap adapted to be placed in a fuel line to a fuel tank comprising: a cylindrical body member having a lower open end and a closed upper end; a chamber in said body member adjacent said lower end containing fuel vapor absorbent material; and valve means between said chamber and upper end of said body member for permitting air to flow through said chamber from the atmosphere.
Claim 2
Dependent Claim
70 words
A fuel tank cap adapted to be placed in a fuel line to a fuel tank comprising: a cylindrical body member having a lower open end and a closed upper end; a chamber in said body member adjacent said lower end containing fuel vapor absorbent material; and valve means between said chamber and upper end of said body member for permitting air to flow through said chamber from the atmosphere.
Claim 3
Dependent Claim
25 words
The cap of claim 1 including a second chamber in said body member between said first chamber and said valve means containing air filtering material.
Claim 4
Dependent Claim
14 words
The cap of claim 2, wherein said valve means is a one-way check valve.
Claim 5
Dependent Claim
128 words
A fuel system comprising: a fuel tank containing liquid and vapor fuel, said vapor phase being above said liquid phase in said tank; a first fuel outlet line connected to the liquid fuel phase in said tank; a second fuel outlet line connected to the vapor fuel phase in said tank; a fuel inlet line connected to said tank; a fuel tank cap adapted to be placed in said fuel inlet line, said cap including, a cylindrical body member having a lower open end and a closed upper end, a chamber in said body member adjacent said lower end containing fuel vapor absorbent material; and valve means between said chamber and upper end of said body member for permitting air to flow through said chamber from the atmosphere.
Claim 6
Dependent Claim
128 words
A fuel system comprising: a fuel tank containing liquid and vapor fuel, said vapor phase being above said liquid phase in said tank; a first fuel outlet line connected to the liquid fuel phase in said tank; a second fuel outlet line connected to the vapor fuel phase in said tank; a fuel inlet line connected to said tank; a fuel tank cap adapted to be placed in said fuel inlet line, said cap including, a cylindrical body member having a lower open end and a closed upper end, a chamber in said body member adjacent said lower end containing fuel vapor absorbent material; and valve means between said chamber and upper end of said body member for permitting air to flow through said chamber from the atmosphere.
Claim 7
Dependent Claim
25 words
The system of claim 4, including a second chamber in said body member between said first chamber and said valve means containing air filtering material.
Claim 8
Dependent Claim
14 words
The system of claim 5, wherein said valve means is a one-way check valve.
Claim 9
Dependent Claim
27 words
The system of claim 6 including pump means in said second fuel outlet line for drawing fuel vapor from said tank and first chamber in said cap.
References Cited (Backward Citations)
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Cited
US3546853A
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US3854911A
Cited
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Cited
US3831353A
Cited
US3844264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |