Patent US4394925A successfully refreshed from Google Patents.
US4394925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel tank-filler pipe particularly for motor vehicles
Assignee: Ford Motor Co
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Filing: 1981-05-29
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Granted: 1983-07-26
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Expires: 2001-05-29
Abstract
Abstract A fuel tank-filler neck is provided for avoiding the return of fuel from a fuel tank during the filling process. The fuel tank-filler neck is adapted to be disposed sloping upwards from the fuel tank at an oblique angle and comprises a filler pipe having an air vent in a lower portion of the filler pipe adapted to the disposed within the fuel tank; a mouth at the upper end of said filler pipe adapted to receive a fuel pump nozzle; a Venturi-type neck of reduced diameter extending the aforesaid lower portion of the filler pipe below the air vent; and an air vent pipe extending within the filler pipe from the mouth to the air vent.
Inventors
- 👤 Egon Rump
- 👤 Wolfgang Franzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:09
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86324; Y10T137/86332
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A fuel tank-filler neck for avoiding the return of fuel from a fuel tank during the filling process, said fuel tank-filler neck being adapted to be disposed sloping upwards from said fuel tank at an oblique angle, comprising a filler pipe, an air vent being provided in a lower portion of said filler pipe adapted to be disposed within said fuel tank; a mouth at an upper end of said filler pipe adapted to receive a fuel pump nozzle; a Venturi-type neck of reduced diameter extending said lower portion of said filler pipe below said air vent; and an air vent pipe extending within said filler pipe from said mouth to said air vent in said lower portion of said filler pipe.
Claim 2
Dependent Claim
122 words
A fuel tank-filler neck for avoiding the return of fuel from a fuel tank during the filling process, said fuel tank-filler neck being adapted to be disposed sloping upwards from said fuel tank at an oblique angle, comprising a filler pipe, an air vent being provided in a lower portion of said filler pipe adapted to be disposed within said fuel tank; a mouth at an upper end of said filler pipe adapted to receive a fuel pump nozzle; a Venturi-type neck of reduced diameter extending said lower portion of said filler pipe below said air vent; and an air vent pipe extending within said filler pipe from said mouth to said air vent in said lower portion of said filler pipe.
Claim 3
Dependent Claim
18 words
The fuel tank-filler neck according to claim 1 wherein said Venturi-type neck is unitary with said filler pipe.
Claim 4
Dependent Claim
31 words
The fuel tank-filler neck according to claim 1 wherein said Venturi-type neck comprises plastic, is non-unitary with said filler pipe and is attached to said filler pipe below said air vent.
Claim 5
Dependent Claim
22 words
The fuel tank-filler neck of claim 3 wherein said Venturi-type neck has axial slots and is clamped flexibly onto said filler pipe.
Claim 6
Dependent Claim
37 words
The fuel tank-filler neck of claim 3 wherein said filler pipe further comprises a locking bolt in said lower portion and said Venturi-type neck has a bayonet slot adapted to be locked positively onto said locking bolt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |