Hydraulic control devices for use with mining apparatus

Details Hydraulic control devices for use with mining apparatus Hydraulic control devices for use with mining apparatus

1984-04-24

1985-08-27

Walton, George L.

Fluid handling

Systems

Valves with separate, correlated, actuators

74 54, 251262, 92134, F16K 31122, F16K 31524

Patent

active

045372217

ABSTRACT:
A compact hydraulic control device for use with mining apparatus is composed of a housing block containing tappet-operated valves. A multi-part cam shaft serves selectively to operate the valves by displacing the tappets by manual control effected by external levers. To automatically restore the cam shaft back into a neutral position as a "dead-man's handle" restoring system use is made of a pair of piston and cylinder assemblies mounted as detachable cartridges in parallel locations within bores in the housing block and having push rods which act on a cam of the cam shaft under the action of hydraulic or pneumatic pressure medium.

REFERENCES:
patent: 2099368 (1937-11-01), Levy
patent: 4031966 (1977-06-01), Farrell
patent: 4310027 (1982-01-01), Weirich

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