Mobile lift apparatus with electric power system
First Claim
1. In combination a vehicle including an engine and a lift apparatus, said lift apparatus being operatively associated with a hydraulic control system including valve actuator means for controlling the operation of said hydraulic control system, said lift apparatus further including an electric motor operatively connected with pump means in said hydraulic control system and an electric power system for energizing said electric motor, said electric power system including battery means in series with said electric motor and switch means between said battery means and said electric motor, said switch means being operatively associated with said valve actuator means, said switch means being open when said valve actuator means is in an inoperative position and being movable to a closed position when said valve actuator means is operative, said electric power system further including master switch means for preventing the simultaneous operation of said vehicle engine and said electric motor.
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Accused Products
Abstract
The preferred embodiment of the invention disclosed in this application includes a vehicle having an engine and carrying a lift apparatus including a boom assembly and hydraulic motors operatively associated with a hydraulic control system for selectively operating the motors to raise and lower the boom. Included in the hydraulic control system is an electric motor and a pump, the former driving the latter and being energized by an electric power system including battery means in series with the motor. Between the battery and the motor there is provided switch means operatively associated with valve actuating members used for the selective operation of the hydraulic control system so that when any valve actuating member is moved to a position operating the hydraulic control system, it simultaneously actuates the switch means closing the circuit between the battery and the motor. Also included in the electric power system is a master switch preventing simultaneous operation of the vehicle engine and the electric power system.
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Citations
9 Claims
- 1. In combination a vehicle including an engine and a lift apparatus, said lift apparatus being operatively associated with a hydraulic control system including valve actuator means for controlling the operation of said hydraulic control system, said lift apparatus further including an electric motor operatively connected with pump means in said hydraulic control system and an electric power system for energizing said electric motor, said electric power system including battery means in series with said electric motor and switch means between said battery means and said electric motor, said switch means being operatively associated with said valve actuator means, said switch means being open when said valve actuator means is in an inoperative position and being movable to a closed position when said valve actuator means is operative, said electric power system further including master switch means for preventing the simultaneous operation of said vehicle engine and said electric motor.
Specification