Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1976-03-17
1978-01-03
Love, John J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
91449, B66B 1104
Patent
active
040661482
ABSTRACT:
Generally described is a hydraulically-actuatable elevator system wherein the vertically reciprocatable cargo-carrying carrier member is suspended from a lofty superstructure by at least one hydraulically-actuatable elongate piston of the casing/plunger type. An electrically powered pump means, having a fluids reservoir co-movably mounted with the carrier, forceably introduces hydraulic fluid along a primary-line into the piston casing thereby decreasing the piston overall length causing the carrier to ascend, and controlled withdrawal of hydraulic fluid from the piston to the reservoir through a secondary-line (provided with an electrically governable checkvalve) allowing the weighty carrier member to descend. An emergency-line communicating between the piston casing and reservoir parallels the secondary-line and bypasses the pump means and the checkvalve and has a normally-closed barrier which is mechanically openable by a carrier passenger whereby the carrier can be made to descend in the contingency of electrical power failure.
REFERENCES:
patent: 3141386 (1964-07-01), Loughridge
patent: 3294199 (1966-12-01), Jarvik
patent: 3304842 (1967-02-01), Shafer
patent: 3650356 (1972-03-01), Brown
patent: 3738455 (1973-06-01), Tintore
Lo-Rise Elevator Company
Love John J.
Nimmer George R.
Rowland James L.
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