Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent
1975-11-25
1977-07-26
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Means maintaining platform level on angularly movable support
Swingable support
182 19, 180 65R, 180 82R, B66F 1104
Patent
active
040376842
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.
REFERENCES:
patent: 2836467 (1958-05-01), Myers
patent: 3016973 (1962-01-01), Williamson
patent: 3043395 (1962-07-01), Volkel
patent: 3095945 (1963-07-01), Mitchell
patent: 3788425 (1974-01-01), Balogh
patent: 3904947 (1975-09-01), Crews
Moyer Richard A.
Patton Joseph D.
Asplundh Tree Expert Company
Logan, Jr. John W.
Machado Reinaldo P.
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