Unitary elevator up level control valve

Details Unitary elevator up level control valve Unitary elevator up level control valve

1976-03-12

1977-03-15

Cohan, Alan

Fluid handling

Systems

Flow path with serial valves and/or closures

91400, 91452, 13759613, 13759616, F15B 13043

Patent

active

040118886

ABSTRACT:
A hydraulic valve assembly for operating a hydraulic elevator is simplified in its construction by positioning the check valve for the up level control in axial alignment with the bypass valve in the same valve housing mutually guided on a central valve stem. Pressure for actuating the bypass valve is controlled by a direct acting valve element structurally mounted on the valve element of the up leveling check valve.

REFERENCES:
patent: 3707166 (1972-12-01), Lawrence et al.

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