US3858675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled vehicle having combined directional and acceleration pedal control
Assignee: Trak International Inc
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Filing: 1973-06-11
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Granted: 1975-01-07
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Expires: 1993-06-11
Abstract
Abstract A self-propelled vehicle, such as an end loader or forklift truck, comprises ground wheels drivable in forward or reverse direction at variable speed by hydraulic motors. The motors are supplied with fluid from at least one variable displacement reversible output hydraulic pump which has an adjustably movable swash plate for controlling motor direction and speed. The pump is driven by an internal combustion engine having a throttle for regulating engine (and therefore pump) speed. A shuttle pedal located in the vehicle operator''s cab is connected to the pump swash plate and to the engine throttle. The shuttle pedal is pivotably movable in opposite directions to control the direction of vehicle movement and is depressible to a desired degree in the selected direction to regulate vehicle speed in the chosen direction. In one preferred embodiment of the invention at least one additional engine driven auxiliary pump is provided to supply fluid to hydraulic actuators which operate other components on the vehicle and an independently usable throttle pedal is provided for regulating engine speed when the hydraulic actuators are in use. The throttle pedal and the shuttle pedal are independently usable but are connected to the engine throttle through a common linkage.
Inventors
- 👤 Warren P Geis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:52
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/42; B; B60; B60W; B60W10/00; B60W10/04; B60W10/10; B60W10/101; B60W10/103; B60W30/00; B60W30/18; B66; B66F; B66F9/00; B66F9/06; B66F9/065; B66F9/0655; F16H61/437; F16H61/46; F16H61/47; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20189
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
268 words
In a self-propelled vehicle: ground wheels; a hydraulic motor for driving at least one of said ground wheels; first hydraulic pump means for supplying fluid to said motor; propulsion means for driving said first pump means; pump control means for said first pump means and including a first member movable to control the direction and speed of rotation of said motor and of said ground wheels; speed control means including a second member movable to regulate the speed of said propulsion means and of said first pump means; a shuttle pedal pivotably movable in opposite directions about a first axis to control the direction and speed of rotation of said motor and said ground wheels, said shuttle pedal comprising two portions located on opposite sides of said axis; a pump control lever arm connected to and movable with said shuttle pedal; means for connecting said pump control lever arm to said first member of said pump control means to effect operation thereof in response to movement of said shuttle pedal; a rotatable shaft disposed transverse said first axis; a throttle control lever arm connected to and rotatable with said shaft; means for connecting said throttle control lever arm to said second member of said speed control means; a stop member projecting from the periphery of said shaft; a pair of independently movable sleeves rotatably mounted on said shaft on opposite sides of said stop member, each sleeve having a lever arm and a portion engageable with said stop member; and means for connecting the lever arm on each sleeve with one of said portions of said shuttle pedal.
Claim 2
Dependent Claim
268 words
In a self-propelled vehicle: ground wheels; a hydraulic motor for driving at least one of said ground wheels; first hydraulic pump means for supplying fluid to said motor; propulsion means for driving said first pump means; pump control means for said first pump means and including a first member movable to control the direction and speed of rotation of said motor and of said ground wheels; speed control means including a second member movable to regulate the speed of said propulsion means and of said first pump means; a shuttle pedal pivotably movable in opposite directions about a first axis to control the direction and speed of rotation of said motor and said ground wheels, said shuttle pedal comprising two portions located on opposite sides of said axis; a pump control lever arm connected to and movable with said shuttle pedal; means for connecting said pump control lever arm to said first member of said pump control means to effect operation thereof in response to movement of said shuttle pedal; a rotatable shaft disposed transverse said first axis; a throttle control lever arm connected to and rotatable with said shaft; means for connecting said throttle control lever arm to said second member of said speed control means; a stop member projecting from the periphery of said shaft; a pair of independently movable sleeves rotatably mounted on said shaft on opposite sides of said stop member, each sleeve having a lever arm and a portion engageable with said stop member; and means for connecting the lever arm on each sleeve with one of said portions of said shuttle pedal.
Claim 3
Dependent Claim
80 words
A vehicle according to claim 1 further comprising at least one component for performing a function on said vehicle; hydraulic actuator means for powering said component; second hydraulic pump means driven by saiD propulsion means for supplying fluid to said actuator means; a throttle pedal operable independently of said shuttle pedal for regulating the speed of said propulsion means and said first and second hydraulic pump means; and means for connecting said throttle pedal to said throttle control lever arm.
Claim 4
Dependent Claim
38 words
A vehicle according to claim 2 wherein said throttle pedal is pivotable about a second axis which is transverse to said first axis, and wherein said first axis is generally parallel to the longitudinal axis of said vehicle.
Claim 5
Dependent Claim
67 words
A vehicle according to claim 2 wherein said ground wheels comprise a pair of front wheels and a pair of rear wheels; wherein said first pump means comprises a pair of first pumps; wherein said pump control means for said first pump means comprises a linkage connected to said shuttle pedal for simultaneously operating said pair of first pumps in response to operation of said shuttle pedal.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |