IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0653319
(2003-09-02)
|
발명자
/ 주소 |
- Keller,Scott W.
- Gavin,Thomas P.
- Cook,Donald G.
- Cook,Michael E.
- Holder,Lonnie E.
|
출원인 / 주소 |
- Hydro Gear Limited Partnership
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
10 인용 특허 :
31 |
초록
A neutral start switch for preventing vehicle users from starting or activating a vehicle engine under certain circumstances and for use in connection with a control arm mechanism, which may be attached to a casing of a hydraulic pump.
대표청구항
▼
What is claimed is: 1. A hydraulic drive device comprising: a casing; a hydraulic pump located within the casing; a control arm coupled to the hydraulic pump to control the hydraulic pump fluid flow; a switch attached to the control arm, the switch having an open state and a closed state, wherein t
What is claimed is: 1. A hydraulic drive device comprising: a casing; a hydraulic pump located within the casing; a control arm coupled to the hydraulic pump to control the hydraulic pump fluid flow; a switch attached to the control arm, the switch having an open state and a closed state, wherein the state of the switch is indicative of the control arm assuming a predefined position. 2. The hydraulic drive device of claim 1, wherein the predefined position of the control arm is a neutral position. 3. The hydraulic drive device of claim 2, wherein the switch being in the closed state is indicative of the control arm being in the neutral position. 4. The hydraulic drive device of claim 2, wherein a prime mover is drivingly coupled to the hydraulic drive device. 5. The hydraulic drive device of claim 4, wherein an ignition is electrically coupled to the prime mover and the switch. 6. The hydraulic drive device of claim 5, wherein the control arm being in the neutral position places the switch in the closed state and enables the ignition switch. 7. The hydraulic drive device of claim 5, wherein the control arm being out of the neutral position places the switch in the open state and disables the ignition switch. 8. The hydraulic drive device of claim 5, wherein the hydraulic drive device and the ignition are independently mounted to a vehicle. 9. The hydraulic drive device of claim 1, wherein a feature formed on the casing cooperates with the switch to change the switch between the open and closed states. 10. The hydraulic drive device of claim 1, further comprising a return-to-neutral mechanism coupled to the control arm, the return-to-neutral mechanism also including a stationary arm. 11. The hydraulic drive device of claim 10, wherein the position of the stationary arm establishes a neutral position of the hydraulic drive device. 12. The hydraulic drive device of claim 10, wherein a feature formed on the stationary arm cooperates with the switch to change the switch between the open and closed states. 13. The hydraulic drive device of claim 10, wherein the state of the switch is indicative of the control arm position with respect to the stationary arm. 14. The hydraulic drive device of claim 1, wherein the switch is mechanically actuated. 15. The hydraulic drive device of claim 1, wherein the switch is a proximity switch. 16. A hydraulic drive device comprising: a casing; a hydraulic pump located within the casing; a control arm coupled to the hydraulic pump to control the hydraulic pump fluid flow; and a switch having an open state and a closed state and cooperating with the control arm, wherein the state of the switch is indicative of the control arm assuming a redefined position, wherein the switch is a proximity switch. 17. A hydraulic drive device comprising: a variable displacement hydraulic pump; a control arm coupled to the hydraulic pump for controlling pump displacement; a switch cooperating with the control arm, the switch providing a signal that is indicative of the control arm position, and a return-to-neutral mechanism coupled to the control arm, the return-to-neutral mechanism having a stationary arm, wherein the switch is attached to the stationary arm. 18. The hydraulic drive device of claim 17, wherein the position of the stationary arm establishes a neutral position of the hydraulic drive device. 19. The hydraulic drive device of claim 17, wherein a feature formed on the control arm cooperates with the switch to change the switch between the open and closed states. 20. A hydraulic drive device attached to a vehicle, the vehicle further including a prime mover, which is drivingly coupled to the hydraulic drive device, the hydraulic drive device comprising: a housing; a hydraulic pump positioned within the housing; a control arm coupled to the hydraulic pump for controlling the hydraulic pump output; an ignition switch electrically coupled to the prime mover; and a neutral switch attached to the control arm and electrically connected to the ignition switch, the neutral switch having an open position where the ignition switch is disabled and a closed position where the ignition switch is enabled, wherein the neutral switch will assume the closed position when the control arm is in a predefined position. 21. The hydraulic drive device of claim 20, wherein the predefined position is a neutral position. 22. The hydraulic drive device of claim 21, further comprising a return-to-neutral mechanism drivingly coupled to the control arm, the return-to-neutral mechanism being used to rotate the control arm to a neutral position and further comprising a stationary arm, an inner scissor return arm, an outer second scissor return arm, and biasing means for returning the control arm to the neutral position. 23. The hydraulic drive device of claim 22, wherein the neutral position is demarked by the position of the stationary arm. 24. The hydraulic drive device of claim 20, wherein the neutral switch is actuated by a feature formed on the casing. 25. The hydraulic drive device of claim 20, wherein the neutral switch is actuated by a feature formed on the stationary arm. 26. The hydraulic drive device of claim 20, wherein the neutral switch is a mechanically actuated switch. 27. The hydraulic drive device of claim 20, wherein the neutral switch is a proximity switch. 28. A hydraulic drive device attached to a vehicle, the vehicle further including a prime mover, which is drivingly coupled to the hydraulic drive device, the hydraulic drive device comprising: a housing; a hydraulic pump positioned within the housing; a control arm coupled to the hydraulic pump for controlling the hydraulic pump output; an ignition switch electrically coupled to the prime mover; a neutral switch cooperating with the control arm and electrically connected to the ignition switch, the neutral switch having an open position where the ignition switch is disabled and a closed position where the ignition switch is enabled, wherein the neutral switch will assume the closed position when the control arm is in a neutral position, and a return-to-neutral mechanism drivingly coupled to the control arm, the return-to-neutral mechanism being used to rotate the control arm to a neutral position and further comprising a stationary arm, an inner scissor return arm, an outer second scissor return arm, and biasing means for returning the control arm to the neutral position, wherein the neutral switch is attached to the stationary arm. 29. The hydraulic drive device of claim 28, wherein the neutral switch is actuated by a feature formed on the control arm. 30. A hydraulic drive device attached to a vehicle, the vehicle further including a prime mover, which is drivingly coupled to the hydraulic drive device, the hydraulic drive device comprising: a housing; a hydraulic pump positioned within the housing; a control arm coupled to the hydraulic pump for controlling the hydraulic pump output; an ignition switch electrically coupled to the prime mover; and a neutral switch cooperating with the control arm and electrically connected to the ignition switch, the neutral switch having an open position where the ignition switch is disabled and a closed position where the ignition switch is enabled, wherein the neutral switch will assume the closed position when the control arm is in a redefined position, wherein the neutral switch is a proximity switch.
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