Pump fluid motor carrying spool valve for distributor valve actu

Details Pump fluid motor carrying spool valve for distributor valve actu Pump fluid motor carrying spool valve for distributor valve actu

1976-02-26

1977-08-16

Croyle, Carlton R.

Pumps

Motor driven

Fluid motor

91287, 91309, F04B 1700, F04B 3500, F01L 2506

Patent

active

040423115

ABSTRACT:
A pressure fluid engine of single acting cylinder type has a directional control valve and a master valve with a spool and two valve seats. The spool is formed on a piston rod extending from a piston in the cylinder, the rod passing through a cylindrical disc of the directional control valve. One of the valve seats is provided in the disc to unseal the pilot operating fluid when it cooperates with the spool at a dead point. Another valve seat for the spool is provided in one of the valve chambers of the directional control valve to unseal the pilot operating fluid when it cooperates with the spool at the other dead point. The directional control valve is actuated by means of directional control of a pilot operating fluid with the master valve, in order to reverse the direction of the piston when the piston reaches one of the dead points.

REFERENCES:
patent: 923486 (1909-06-01), Bowen
patent: 3071118 (1963-01-01), Wilden
patent: 3726185 (1973-04-01), Orr
patent: 3963383 (1976-06-01), Hill

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