Patent US4228110A successfully refreshed from Google Patents.
US4228110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasoline priming pump for carburetors
Assignee: Individual
•
Filing: 1979-06-04
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Granted: 1980-10-14
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Expires: 1999-06-04
Abstract
Abstract A combination gasoline priming pump and gasoline overflow drain for use on carburetors. The pump has a cylindrical body having an axial cylindrical bore. The bore is closed at its upper end and has an opening at its lower end. A hollow tube extends through the opening and a piston is connected to the upper end thereof. A conduit connects the upper end of the cylindrical bore with the carburetor body.
Inventors
- 👤 Melvin Magnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/16; F02M5/00; F02M5/12; Y; Y10; Y10S; Y10S261/00; Y10S261/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
185 words
A carburetor having a combination gasoline priming pump and gasoline overflow drain, said carburetor comprising: a carburetor body having a gasoline reservoir chamber; a gasoline priming pump air exit and gasoline entry line affixed to and extending through said gasoline reservoir chamber at a level above the normal gasoline level but below the level of gasoline when the chamber is overfilled with gasoline; a cylindrical body affixed to said line, said body having an axial cylindrical bore, said bore being closed at its upper end, said line passing through the wall of said cylindrical body near the upper end of the body; an axial, cylindrical passageway in the lower end of said body; a hollow rod held by said passageway and extending at its lower extremity below the bottom of said clyindrical body and extending into said cylindrical bore; and piston means affixed to the hollow rod near the upper end thereof whereby when a finger is placed over the lower end of said hollow rod and said hollow rod is moved upwardly, air is forced out of said air exit and gasoline entry line.
Claim 2
Dependent Claim
185 words
A carburetor having a combination gasoline priming pump and gasoline overflow drain, said carburetor comprising: a carburetor body having a gasoline reservoir chamber; a gasoline priming pump air exit and gasoline entry line affixed to and extending through said gasoline reservoir chamber at a level above the normal gasoline level but below the level of gasoline when the chamber is overfilled with gasoline; a cylindrical body affixed to said line, said body having an axial cylindrical bore, said bore being closed at its upper end, said line passing through the wall of said cylindrical body near the upper end of the body; an axial, cylindrical passageway in the lower end of said body; a hollow rod held by said passageway and extending at its lower extremity below the bottom of said clyindrical body and extending into said cylindrical bore; and piston means affixed to the hollow rod near the upper end thereof whereby when a finger is placed over the lower end of said hollow rod and said hollow rod is moved upwardly, air is forced out of said air exit and gasoline entry line.
Claim 3
Dependent Claim
29 words
The carburetor of claim 1 wherein said axial cylindrical bore is about 1/2 inch in diameter and wherein the stroke of said piston is about 3/8 of an inch.
Claim 4
Dependent Claim
16 words
The carburetor of claim 1 wherein said body has a threaded cap at the bottom thereof.
Claim 5
Dependent Claim
12 words
The carburetor of claim 1 wherein said piston is a Viton cup.
Claim 6
Dependent Claim
42 words
The carburetor of claim 4 wherein said biasing means is a helical spring and further including a second helical spring positioned near the inner surface of said bore and held at its lower end by the inner surface of said piston means.
Claim 7
Dependent Claim
14 words
The carburetor of claim 1 further including biasing means urging the hollow rod downwardly.
Claim 8
Dependent Claim
13 words
The carburetor of claim 6 wherein said biasing means comprises a helical spring.
Claim 9
Dependent Claim
30 words
The carburetor of claim 7 wherein said hollow rod has a widened upper end extending into said bore and forming a platform for the lower end of the helical spring.
Claim 10
Dependent Claim
32 words
The carburetor of claim 8 further including a second helical spring positioned near the inner surface of said bore and held at its lower end by the inner surface of said piston.
Claim 11
Dependent Claim
34 words
The carburetor of claim 9 wherein said piston is a polymeric cup having a piston-spreading spring positioned on the inner wall thereof, said spring extending upwardly to the upper end of said cylindrical bore.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |