US4077884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel tank assembly
Assignee: Audi AG
•
Filing: 1975-11-26
•
Granted: 1978-03-07
•
Expires: 1995-11-26
Abstract
Abstract A fuel tank is provided in the middle of its floor with a vessel from which the fuel is withdrawn by a fuel pump. A plurality of upright baffles are spaced radially apart around the vessel and have edges turned toward the vessel and received in reinforcing ribs of a filter carried over the vessel and formed as a downwardly open cup. A fuel-recirculating pipe directs a stream of fuel backwardly in the direction of travel against the forward face of the filter cup.
Inventors
- 👤 Fritz Albert Naumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:44
CPC Classifications
B; B60; B60K; B60K15/00; B60K15/03; B60K15/077; B60K2015/03105; B60K2015/03236; B60K2015/03328; B60K2015/0344; Y; Y10; Y10S; Y10S123/00; Y10S123/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A fuel-tank assembly comprising: a fuel tank having a floor and sides and adapted to hold a quantity of liquid fuel; a recess in the floor of said tank, said recess being open upwardly; an inverted cup of fibrous material forming a filter and positioned over said recess, said cup having a cylindrical periphery; a first pipe lying in said recess and opening into said cup for withdrawing fuel from said tank through said filter; a plurality of upright baffles in said tank secured to said floor and terminating adjacent said cup, said baffles being angularly spaced around said cup; a further pipe opening into said tank and inclined upwardly while being trained on said periphery of said cup for directing a jet of recirculated heated fuel upwardly and radially against the exterior of said cup; and means for withdrawing fuel through said first pipe and recirculating heated fuel to said tank through said further pipe.
Claim 2
Dependent Claim
156 words
A fuel-tank assembly comprising: a fuel tank having a floor and sides and adapted to hold a quantity of liquid fuel; a recess in the floor of said tank, said recess being open upwardly; an inverted cup of fibrous material forming a filter and positioned over said recess, said cup having a cylindrical periphery; a first pipe lying in said recess and opening into said cup for withdrawing fuel from said tank through said filter; a plurality of upright baffles in said tank secured to said floor and terminating adjacent said cup, said baffles being angularly spaced around said cup; a further pipe opening into said tank and inclined upwardly while being trained on said periphery of said cup for directing a jet of recirculated heated fuel upwardly and radially against the exterior of said cup; and means for withdrawing fuel through said first pipe and recirculating heated fuel to said tank through said further pipe.
Claim 3
Dependent Claim
21 words
The assembly defined in claim 1 wherein said filter is formed with grooves, said baffles having edges fitted into said grooves.
Claim 4
Dependent Claim
41 words
The assembly defined in claim 1 forming part of a vehicle wherein said baffles are spaced apart transversely to a predetermined travel direction of said vehicle, said further pipe injecting fuel back opposite said direction in a stream against said filter.
Claim 5
Dependent Claim
46 words
The assembly defined in claim 3 wherein said baffles include a first and a second pair of such baffles bridged by and engaging said filter, the first pair being mainly forward of said filter and said second pair being mainly behind said filter in said direction.
References Cited (Backward Citations)
US1191741A
Cited
US1578903A
Cited
US2711828A
Cited
US2770362A
Cited
US3049171A
Cited
US3173469A
Cited
US3143187A
Cited
US3653531A
Cited
US3881457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-06 | 1981-09-05 | 1982-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-06 | 1985-09-05 | 1986-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-06 | 1989-09-05 | 1990-03-07 | $7700.00 | Window Closed / Lapsed |