US3875267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor float
Assignee: Nissan Motor Co Ltd
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Filing: 1973-12-12
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Granted: 1975-04-01
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Expires: 1993-12-12
Abstract
Abstract A generally triskelion shaped float with one of the legs extending downward provides increased upward force to close a fuel inlet valve when the carburetor or the fuel surface is tilted forward or backward to prevent overfilling of the float chamber under these conditions.
Inventors
- 👤 Chichitada Seki
- 👤 Takashi Hisatomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:13
CPC Classifications
F; F02; F02M; F02M5/00; F02M5/12; F02M5/16; Y; Y10; Y10S; Y10S261/00; Y10S261/50; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/742; Y10T137/7439; Y10T137/7465; Y10T137/7472
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
In combination; means defining a liquid float chamber, a float swingable in a normally vertical plane within said liquid float chamber, a normally horizontal pin about which said float is swingable; a lever connecting said float to said pin; means defining a liquid inlet to said chamber; valve means connected to said lever to open and close said liquid inlet to the chamber; said float having one lower section and two upper sections spaced along the axis of the lever; said lower section being substantially below and said two upper sections being substantially above a predetermined normal level of liquid in the float chamber; the effective surface area of said float in contact with liquid in the float chamber thus increasing as at least one of the float chamber and the surface of liquid in the float chamber is rotated in the normally vertical plane from respective normally horizontal positions, thereby increasing the force applied by said float to the lever in a direction to cause said valve means to close the fuel inlet.
Claim 2
Dependent Claim
174 words
In combination; means defining a liquid float chamber, a float swingable in a normally vertical plane within said liquid float chamber, a normally horizontal pin about which said float is swingable; a lever connecting said float to said pin; means defining a liquid inlet to said chamber; valve means connected to said lever to open and close said liquid inlet to the chamber; said float having one lower section and two upper sections spaced along the axis of the lever; said lower section being substantially below and said two upper sections being substantially above a predetermined normal level of liquid in the float chamber; the effective surface area of said float in contact with liquid in the float chamber thus increasing as at least one of the float chamber and the surface of liquid in the float chamber is rotated in the normally vertical plane from respective normally horizontal positions, thereby increasing the force applied by said float to the lever in a direction to cause said valve means to close the fuel inlet.
Claim 3
Dependent Claim
26 words
A float as claimed in claim 1, in which said lower section has a substantially triangular profile and said two upper sections have substantially trapezoidal profiles.
Claim 4
Dependent Claim
20 words
A float as claimed in claim 1, in which said lower and said two upper sections have substantially rectangular profiles.
Claim 5
Dependent Claim
18 words
A float as claimed in claim 1, in which said two upper sections are of the same size.
Claim 6
Dependent Claim
17 words
A float as claimed in claim 1, in which said two upper sections are of different sizes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |