Patent FR993029A successfully refreshed from Google Patents.
Patent US3681407A successfully refreshed from Google Patents.
Patent US4335061A successfully refreshed from Google Patents.
US4335061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary fuel supply device for internal combustion engines
Assignee: Walbro Far East Inc
•
Filing: 1980-06-03
•
Granted: 1982-06-15
•
Expires: 2000-06-03
Abstract
Abstract In a carburetor for furnishing fuel to internal combustion engines and utilizing a cylindrical rotary throttle valve as the venturi of the mixing passage, the addition of a fuel retaining means of absorbent material to prevent the puddling of unused fuel during the idling cycle and thus avoiding the problem of an overrich mixture when the carburetor is moved to another position.
Inventors
- 👤 Hiroto Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:54
CPC Classifications
F; F02; F02M; F02M9/00; F02M9/08; F02M9/085; F02M1/00; F02M1/16; F02M17/00; F02M17/02; F02M17/04; F02M33/00; F02M33/02; F02M33/04; Y; Y10; Y10S; Y10S261/00; Y10S261/08; Y10S261/68
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
In a carburetor body having a fuel and air mixing passage for supplying fuel to an internal combustion engine, said carburetor body having a fuel chamber, an air inlet passage, a main fuel nozzle to said air inlet passage, a throttle valve and an outlet for fuel and air mixture, a design to improve the fuel flow to assist in the starting of an engine in the absence of a choke valve which comprises: (a) a body of porous absorbent material in the carburetor body upstream of said throttle valve to serve as a fuel retaining storage reservoir located on one side of the air inlet passage in the body of said carburetor and upstream from the main fuel inlet, (b) a fuel passage in said carburetor body independent of the main fuel inlet to carry liquid fuel to the interior of said porous body, and (c) a pressure means on said body to direct liquid fuel from said fuel chamber in said body through said fuel passage to the interior of said body of porous absorbent material preparatory to the starting of an engine.
Claim 2
Dependent Claim
185 words
In a carburetor body having a fuel and air mixing passage for supplying fuel to an internal combustion engine, said carburetor body having a fuel chamber, an air inlet passage, a main fuel nozzle to said air inlet passage, a throttle valve and an outlet for fuel and air mixture, a design to improve the fuel flow to assist in the starting of an engine in the absence of a choke valve which comprises: (a) a body of porous absorbent material in the carburetor body upstream of said throttle valve to serve as a fuel retaining storage reservoir located on one side of the air inlet passage in the body of said carburetor and upstream from the main fuel inlet, (b) a fuel passage in said carburetor body independent of the main fuel inlet to carry liquid fuel to the interior of said porous body, and (c) a pressure means on said body to direct liquid fuel from said fuel chamber in said body through said fuel passage to the interior of said body of porous absorbent material preparatory to the starting of an engine.
Claim 3
Dependent Claim
46 words
A carburetor body as defined in claim 1 in which said body of porous absorbent material is shaped as a chordal segment of a cylinder and positioned in a recess in said body having a wall portion to interfit with the curved wall of said segment.
Claim 4
Dependent Claim
92 words
A carburetor as defined in claim 1 in which said carburetor body has a diaphragm fuel chamber supplied by a pulse pump operated by crankcase pressures whereby fuel is supplied to the main fuel nozzle from said chamber, and said pressure means comprises a manually operable primer pump on said carburetor body having an inlet passage and inlet valve connected to said diaphragm fuel chamber, and an outlet passage and outlet valve connected to said fuel passage to carry liquid fuel from said fuel chamber to said body of porous absorbent material.
References Cited (Backward Citations)
US817641A
Cited
US1038300A
Cited
US1098827A
Cited
US1162804A
Cited
US1164931A
Cited
US1280463A
Cited
US1448215A
Cited
US2606751A
Cited
US3272485A
Cited
US3494343A
Cited
US3695593A
Cited
US3838673A
Cited
US3991724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |