G - Physics – 05 – D
Patent
G - Physics
05
D
138/79
G05D 7/00 (2006.01) B66B 1/04 (2006.01)
Patent
CA 1243585
Abstract of the Disclosure A hydraulic control system for an elevator or other similar reciprocating user is disclosed, which comprises an adjustable throttle valve and a control or bypass valve disposed in the fluid supply line between the pump and elevator. A pressure difference balance is pro- vided for controlling the operation of the control valve, and the pressure difference balance has one end operatively connected to the pressure provided by the pump, and the other end operatively connected to the pressure in the user or load line. The control valve is thus adapted to main- tain a desired pressure difference across the throttle valve which is independent of the load on the user. In addition, the zero setting of the pressure difference balance is adjustable, so as to permit the system to be equally operable in both the upward and downward movements of the elevator.
490527
Beringer-Hydraulik G.m.b.h.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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