US5231965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Throttle signal modifying circuit
Assignee: Deere and Co
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Filing: 1992-11-23
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Granted: 1993-08-03
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Expires: 2012-11-23
Abstract
Abstract An engine governor system includes an electronic governor which controls the fuel supply to an engine in response to an throttle signal supplied by a throttle potentiometer which coupled to a throttle lever. A circuit is connected between the throttle potentiometer and a potential source. The circuit includes a normally closed foot-operated deceleration switch connected in parallel with a first variable resistor, both connected in series with a third variable resistor. Closing the foot-operated switch will reduce the throttle signal by an amount controlled by the adjustment of the first variable resistor. The maximum possible throttle signal can be controlled by the adjustment of the second variable resistor.
Inventors
- 👤 Norman E. Muzzy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:01
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/24; F02D41/26; F02D41/28; F02D11/00; F02D11/06; F02D11/10; F02D11/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
In an engine governor system having an electronic governor, an operator controlled throttle device and a throttle position sensor coupled to the throttle device and connected to inputs of the electronic governor, the throttle position sensor comprising a throttle potentiometer connected to a potential source and with a tap element generating a variable magnitude throttle signal which is utilized by the electronic governor, the engine governor system also having modifying means coupled between the potential source and the throttle potentiometer for modifying the throttle signal supplied by the tap element of the throttle potentiometer, the improvement wherein the modifying means comprises: a normally closed switch having a first terminal connected to the potential source and a second terminal coupled to the throttle potentiometer; and a first variable resistor connected between the first and second terminals of the normally closed switch.
Claim 2
Dependent Claim
140 words
In an engine governor system having an electronic governor, an operator controlled throttle device and a throttle position sensor coupled to the throttle device and connected to inputs of the electronic governor, the throttle position sensor comprising a throttle potentiometer connected to a potential source and with a tap element generating a variable magnitude throttle signal which is utilized by the electronic governor, the engine governor system also having modifying means coupled between the potential source and the throttle potentiometer for modifying the throttle signal supplied by the tap element of the throttle potentiometer, the improvement wherein the modifying means comprises: a normally closed switch having a first terminal connected to the potential source and a second terminal coupled to the throttle potentiometer; and a first variable resistor connected between the first and second terminals of the normally closed switch.
Claim 3
Dependent Claim
24 words
The invention of claim 1, further comprising: a second variable resistor connected between the second terminal of the switch and the throttle position sensor.
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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) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |