US3907943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic choke for a carburetor
Assignee: Toyota Motor Corp
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Filing: 1974-01-04
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Granted: 1975-09-23
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Expires: 1994-01-04
Abstract
Abstract A bimetallic coil for an automatic choke for a carburetor on a vehicular engine, which is provided with means for holding the bimetallic coil against vibration. The means for holding the bimetallic coil against vibration comprises, for example, a plurality of pins or an elongate wall type structure positioned in proximity to the coil so as to be contacted by or contact the loops formed on the coil upon thermal deformation of the coil or the coil and the means to thereby prevent or at least reduce the vibration of the coil during the operation of the engine.
Inventors
- 👤 Hidenori Tateno
- 👤 Masami Konishi
- 👤 Hisaharu Arai
- 👤 Kenji Koeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:52
CPC Classifications
F; F02; F02M; F02M1/00; F02M1/08; F02M1/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
In combination with an automatic choke system for an internal combustion engine carburetor having a bimetallic coil in a housing for restraining the opening of a throttle valve in said carburetor, the improvement comprising: a curved double wall structure channel-shaped in cross-section surrounding at leasT a portion of the outermost turn of said bimetallic coil, said structure being secured to said housing in spaced relation to said bimetallic coil and adapted to be contacted by said bimetallic coil to prevent vibration thereof.
Claim 2
Dependent Claim
82 words
In combination with an automatic choke system for an internal combustion engine carburetor having a bimetallic coil in a housing for restraining the opening of a throttle valve in said carburetor, the improvement comprising: a curved double wall structure channel-shaped in cross-section surrounding at leasT a portion of the outermost turn of said bimetallic coil, said structure being secured to said housing in spaced relation to said bimetallic coil and adapted to be contacted by said bimetallic coil to prevent vibration thereof.
Claim 3
Dependent Claim
70 words
IN COMBINATION WITH AN AUTOMATIC CHOKE SYSTEM FOR AN INTERNAL COMBUSTION ENGINE CARBURETOR HAVING A BIMETALLIC COIL IN A HOUSING FOR RESTRAINIG THE OPENING OF A THROTTLE VALVE IN SAID CARBURETOR, THE IMPROVEMENT COMPRISING: AT LEAST ONE PIN SECURED AT ONE END OF SAID HOUSING IN PROXIMITY SAID BIMETALLIC COIL, SAID BIMETALLIC COIL, UPON HEATING THEREOF, BEING MOVABLE INTO CONTACT WITH SAID PIN TO PREVENT VIBRATION OF SAID BIMETALLIC COIL.
Claim 4
Dependent Claim
70 words
IN COMBINATION WITH AN AUTOMATIC CHOKE SYSTEM FOR AN INTERNAL COMBUSTION ENGINE CARBURETOR HAVING A BIMETALLIC COIL IN A HOUSING FOR RESTRAINIG THE OPENING OF A THROTTLE VALVE IN SAID CARBURETOR, THE IMPROVEMENT COMPRISING: AT LEAST ONE PIN SECURED AT ONE END OF SAID HOUSING IN PROXIMITY SAID BIMETALLIC COIL, SAID BIMETALLIC COIL, UPON HEATING THEREOF, BEING MOVABLE INTO CONTACT WITH SAID PIN TO PREVENT VIBRATION OF SAID BIMETALLIC COIL.
Claim 5
Dependent Claim
22 words
The combination defined in claim 2 wherein said pin is positioned in proximity to the outer peripheral surface of said bimetallic coil.
Claim 6
Dependent Claim
36 words
The combination defined in claim 2 wherein said pin is positioned in proximity to that portion of said bimetallic coil in which a loop of vibration may be formed when said bimetallic coil tends to vibrate.
Claim 7
Dependent Claim
84 words
In combination with an automatic choke system for an internal combustion engine carburetor having a bimetallic coil in a housing for restraining the opening of a throttle valve in said carburetor, the improvement comprising: at least one elongated curved wall formed from a bimetallic strip and extending around said bimetallic coil in proximity thereto, one end of said wall being secured to said housing and the opposite end of said wall being free and adapted to contact said bimetallic coil to prevent vibration thereof.
Claim 8
Dependent Claim
84 words
In combination with an automatic choke system for an internal combustion engine carburetor having a bimetallic coil in a housing for restraining the opening of a throttle valve in said carburetor, the improvement comprising: at least one elongated curved wall formed from a bimetallic strip and extending around said bimetallic coil in proximity thereto, one end of said wall being secured to said housing and the opposite end of said wall being free and adapted to contact said bimetallic coil to prevent vibration thereof.
Claim 9
Dependent Claim
27 words
The combination defined in claim 5 wherein said wall has an inner surface complementary to the outer peripheral surface of said bimetallic coil in spaced relation thereto.
Claim 10
Dependent Claim
62 words
The combination defined in claim 5 wherein said wall is made of a bimetallic strip having a larger coefficient of thermal expansion than the material of which said bimetallic coil is made, said opposite end of said wall being adapted to bend toward said bimetallic coil and contact the outer peripheral surface thereof when said wall is brought to an elevated temperature.
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |