Electric truck having elevated load potential energy recovery wi

Details Electric truck having elevated load potential energy recovery wi Electric truck having elevated load potential energy recovery wi

1974-10-21

1976-03-30

Miller, J. D.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 14, 322 72, 318139, 290 50, H02J 700

Patent

active

039477444

ABSTRACT:
A lift truck energized from a battery to supply pressurized fluid to elevate a load-supporting carriage has an energy recovery system for converting kinetic energy of the elevated carriage into battery charging current including a fluid motor through which fluid from the lift ram is exhausted when the carriage is descending, an alternator driven by the fluid motor, a rectifier between alternator and battery, a transistor having its emitter-collector circuit in series with the field winding of the alternator, and a rate-of-descent adjusting potentiometer for selectively varying base drive to the transistor to thereby regulate field excitation of the alternator and the regenerative braking of the fluid motor.

REFERENCES:
patent: 3512072 (1970-05-01), Karazija et al.
patent: 3546548 (1970-12-01), Wouk
patent: 3628621 (1971-12-01), Lee

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