US3650252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine governors
Assignee: Victa Ltd
•
Filing: 1970-03-31
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Granted: 1972-03-21
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Expires: 1990-03-31
Abstract
Abstract Means for governing the speed of an engine by providing attached to the carburetor butterfly spindle an air vane deflected by a stream of engine-cooling air produced by the engine to close the butterfly against spring action, and accelerator control means for the engine operating to increase tension on the spring with its advancement and to decrease the tension with retarding of the accelerator.
Inventors
- 👤 Peter David Glover
- 👤 Richard Forshaw
- 👤 William Henry Steele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:01
CPC Classifications
F; F02; F02D; F02D31/00; F02D9/00; F02D9/02; F02D2009/0201; F02D2009/0216
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
175 words
A speed governor for an engine controlled by a butterfly throttle carburetor and producing a stream of air dependent upon engine cooling purposes, comprising a shaft rotatably mounted upon the carburetor and protruding therefrom, means connecting said shaft with the butterfly throttle for throttle control of the carburetor, an air vane fixed to the end of the protruding portion of said shaft, said vane being angularly deployed with respect to the cooling air stream of the engine so as to be increasingly exposed to the air stream with increasing velocity thereof to rotate said shaft in response to increasing exposure of said vane to the air stream to progressively close said throttle, a manually controlled accelerator element rotatable about said shaft for selective adjustment of said throttle, and a torsion spring encircling said shaft and interconnecting the manual control and the air vane to impose resilient pressure resisting said increased exposure of the vane to the air stream and operating to increase said resilient pressure on said vane with manual advancement of said accelerator element.
Claim 2
Dependent Claim
175 words
A speed governor for an engine controlled by a butterfly throttle carburetor and producing a stream of air dependent upon engine cooling purposes, comprising a shaft rotatably mounted upon the carburetor and protruding therefrom, means connecting said shaft with the butterfly throttle for throttle control of the carburetor, an air vane fixed to the end of the protruding portion of said shaft, said vane being angularly deployed with respect to the cooling air stream of the engine so as to be increasingly exposed to the air stream with increasing velocity thereof to rotate said shaft in response to increasing exposure of said vane to the air stream to progressively close said throttle, a manually controlled accelerator element rotatable about said shaft for selective adjustment of said throttle, and a torsion spring encircling said shaft and interconnecting the manual control and the air vane to impose resilient pressure resisting said increased exposure of the vane to the air stream and operating to increase said resilient pressure on said vane with manual advancement of said accelerator element.
Claim 3
Dependent Claim
62 words
An engine speed governor according to claim 1, wherein said shaft is rotatably supported in a hollow extension of the carburetor housing, and said air vane has a base portion fixed to the end of said shaft, and a resilient seal is provided between the base portion and the housing extension to exclude foreign matter from the interior of the housing extension.
Claim 4
Dependent Claim
42 words
An engine speed governor according to claim 1, having a ring on the shaft connected to one end of the torsion spring for adjustment of the tension therein, and being connected with selective adjustment to the manual control by coacting ratchet teeth.
Claim 5
Dependent Claim
183 words
In a butterfly throttle carburetor for use on an internal combustion engine of a kind producing an engine-cooling air stream dependent in velocity upon the speed of the engine, a housing, a butterfly control valve, a spindle therefor rotatable within the housing, a bevel gear on one end of the spindle, a further bevel gear meshing therewith, a shaft secured to the further gear and extending normal to the spindle, a hollow extension on the housing through which the shaft extends, an offset air vane on the end of the shaft for positioning in the path of the engine cooling air stream and movable to and from a maximum projected position at which the butterfly control valve is closed, a manually actuated accellerator member positioned for rotation over an intermediate portion of the shaft, control linkage attached thereto, and a torsion spring connected between the accellerator member and the air vane, the control linkage and spring being connected so that manual advancement of the accellerator increases the tension in the spring to urge the air vane away from its said maximum projected position.
Claim 6
Dependent Claim
183 words
In a butterfly throttle carburetor for use on an internal combustion engine of a kind producing an engine-cooling air stream dependent in velocity upon the speed of the engine, a housing, a butterfly control valve, a spindle therefor rotatable within the housing, a bevel gear on one end of the spindle, a further bevel gear meshing therewith, a shaft secured to the further gear and extending normal to the spindle, a hollow extension on the housing through which the shaft extends, an offset air vane on the end of the shaft for positioning in the path of the engine cooling air stream and movable to and from a maximum projected position at which the butterfly control valve is closed, a manually actuated accellerator member positioned for rotation over an intermediate portion of the shaft, control linkage attached thereto, and a torsion spring connected between the accellerator member and the air vane, the control linkage and spring being connected so that manual advancement of the accellerator increases the tension in the spring to urge the air vane away from its said maximum projected position.
Claim 7
Dependent Claim
37 words
An engine speed governor according to claim 4, wherein the accellerator member comprises a hollow boss surrounding the shaft and a radial arm integral with said boss to which is attached an end of a control cable.
Claim 8
Dependent Claim
30 words
An engine speed governor according to claim 4, wherein a fin is provided in the carburetor throat to serve as a limit stop for opening movement of the butterfLy throttle.
Claim 9
Dependent Claim
56 words
An engine speed governor according to claim 4, having a ring adjacent the accelerator member and coacting ratchet teeth therebetween, said torsion spring being connected between the air vane and said ring so that an adjustment is provided of the extension in said torsion spring which is exerted between the air vane and the accelerator member.
References Cited (Backward Citations)
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Cited
US1660079A
Cited
US2548334A
Cited
US2529242A
Cited
US2815739A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |