Motors: expansible chamber type – Working member position responsive motive fluid control – Exhaust control
Patent
1974-12-09
1976-08-03
Maslousky, Paul E.
Motors: expansible chamber type
Working member position responsive motive fluid control
Exhaust control
91468, F15B 13042
Patent
active
039722651
ABSTRACT:
A stroke control mechanism for a hydraulic actuator having a piston and cylinder device including a blocking valve for selectively blocking fluid flow from one side of the actuator, the blocking valve consisting of a spring biased check valve mounted on one end of a valve stem and actuable by a control bar on the piston rod at the end of the stroke of the piston, the spring biased check valve being constructed to be opened by fluid pressure flowing to the extending side of the piston without movement of the valve stem so that creepage of the piston during its retracting movement resulting in contact between the valve stem and the actuating member will not prevent reversal of the piston.
REFERENCES:
patent: 1544751 (1925-07-01), Haynes et al.
patent: 2699150 (1955-01-01), Ziskal
patent: 2858803 (1958-11-01), Ethington et al.
patent: 2939427 (1960-06-01), Peros
patent: R23537 (1952-08-01), Fletcher
Bruning Company
Maslousky Paul E.
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