US3704635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle return spring redundancy system
Assignee: Individual
•
Filing: 1971-06-01
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Granted: 1972-12-05
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Expires: 1991-06-01
Abstract
Abstract A throttle valve, situated within the induction passage of a fuel or air induction device, is carried by a throttle shaft for fixed rotation therewith; a lever fixedly connected to the throttle shaft is operatively connected to a remotely situated operator''s foot-operated throttle control; a first throttle return spring is operatively connected to the first lever for returning the throttle valve to an idle position whenever the foot-operated throttle control is released; a second safety spring is provided for assuring the movement of the throttle valve to the idle position in the event that, for example, either the first throttle return spring or the associated throttle control linkage should fail while the throttle valve is in either a partly or fully opened position; and manually operated lever means is provided for at times operatively engaging the lever fixedly secured to the throttle shaft in order to thereby rotate the throttle valve toward an open position against the resistance of the safety spring.
Inventors
- 👤 Phillip V Eshelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:47
CPC Classifications
F; F02; F02M; F02M19/00; F02M19/12; F02M19/128; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20213; Y10T74/2022; Y10T74/20226
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
Apparatus for assuring the return of a throttle valve from a partly opened or fully opened position to an idle position, comprising a shaft rotatable in accordance with the rotation of said throttle valve, first manually actuated throttle control linkage means operatively connected to said shaft for at times effecting rotation of said shaft and said throttle valve in a throttle opening direction, first spring means operatively connected to said shaft and said throttle valve for applying a resilient force thereagainst in a direction opposIte to said throttle opening direction in order to at times rotate said shaft and said throttle valve to said idle position, second resilient means effective upon the occurrence of a failure in said first spring means for automatically causing said shaft and said throttle valve to be rotated to said idle position, and second manually actuated throttle control linkage means, said second manually actuated linkage means being effective for at times causing rotation of said shaft and said throttle valve in said throttle opening direction against the resistance of said second resilient means.
Claim 2
Dependent Claim
178 words
Apparatus for assuring the return of a throttle valve from a partly opened or fully opened position to an idle position, comprising a shaft rotatable in accordance with the rotation of said throttle valve, first manually actuated throttle control linkage means operatively connected to said shaft for at times effecting rotation of said shaft and said throttle valve in a throttle opening direction, first spring means operatively connected to said shaft and said throttle valve for applying a resilient force thereagainst in a direction opposIte to said throttle opening direction in order to at times rotate said shaft and said throttle valve to said idle position, second resilient means effective upon the occurrence of a failure in said first spring means for automatically causing said shaft and said throttle valve to be rotated to said idle position, and second manually actuated throttle control linkage means, said second manually actuated linkage means being effective for at times causing rotation of said shaft and said throttle valve in said throttle opening direction against the resistance of said second resilient means.
Claim 3
Dependent Claim
54 words
Apparatus according to claim 1, including first lever means carried by said shaft for rotation therewith, wherein said first manually actuated throttle control linkage means is connected to said shaft through said first lever means, and wherein said second resilient means comprises second spring means pre-loaded and operatively connected to said first lever means.
Claim 4
Dependent Claim
111 words
Apparatus according to claim 1, including first lever means carried by said shaft for rotation therewith, wherein said first manually actuated throttle control linkage means is connected to said shaft through said first lever means, wherein said second resilient means comprises second spring means pre-loaded and operatively connected to said first lever means, and latching means for preventing said second spring means from causing rotational motion of said first lever means and said shaft during normal operation, said latching means being disengaged and effective upon failure of said first spring means to permit said second spring means to resiliently urge said first lever means and throttle valve to said idle position.
Claim 5
Dependent Claim
44 words
Apparatus according to claim 3, wherein said said second manually actuated linkage means comprises a second rotatable lever, said second rotatable lever being effective to upon actuation thereof abuttingly engage and rotate said first lever means and said shaft in said throttle opening direction.
Claim 6
Dependent Claim
45 words
Apparatus according to claim 3, wherein said second manually actuated linkage means comprises a second lever freely rotatable about said shaft, said second lever being effective upon actuation thereof to engage and rotate said first lever means and said shaft in said throttle opening direction.
Claim 7
Dependent Claim
143 words
Apparatus according to claim 3, wherein said latching means comprises a second lever member secured directly to said first manually actuated linkage means and freely rotatable about said shaft, a third lever member pivotally connected to said first lever means, a first latching surface formed on said second lever, a second latching surface formed on said third lever and adapted for cooperative engagement with said first latching surface, wherein said first spring means is operatively connected to said third lever for urging and maintaining said first and second latching surfaces in cooperative engagement as long as said first spring means does not experience a failure, and wherein said second spring means operatively engages said first lever means and said second lever in a manner continually urging said first lever means and said second lever to experience relative rotation with respect to each other.
Claim 8
Dependent Claim
43 words
Apparatus according to claim 6, wherein said second manually actuated linkage means comprises a fourth rotatable lever, said fourth rotatable lever being effective upon actuation thereof to abuttingly engage and rotate said first lever means and said shaft in said throttle opening direction.
Claim 9
Dependent Claim
45 words
Apparatus according to claim 6, wherein said second manually actuated linkage means comprises a fourth lever freely rotatable about said shaft, said fourth lever being effective upon actuation thereof to engage and rotate said first lever means and said shaft in said throttle opening direction.
References Cited (Backward Citations)
US1522764A
Cited
US2071695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |