Motors: expansible chamber type – Cyclically operable – With means independent of distributor reversing parts to...
Patent
1977-03-29
1979-09-04
Maslousky, Paul E.
Motors: expansible chamber type
Cyclically operable
With means independent of distributor reversing parts to...
91341R, 91346, 91397, 91398, F01L 3108, F01L 2300
Patent
active
041664116
ABSTRACT:
A linear fluid-operated actuator includes a casing having a piston assembly slidingly movable in a main cylinder within the casing and provided with force transmitting means adapted to transmit the motion of the piston to the outside. A linear flow control assembly is provided including two valves which are each slidable within a valve cylinder positioned on either side of the main cylinder in coaxial relation and merging therewith. The valves are connected to each other for simultaneous movement and the size of the valve member, the extent of its movement and the position of an inlet and outlet port provided in each valve cylinder is such that the inlet in one cylinder is closed while its outlet is open, and the inlet of the other cylinder is open while its outlet is closed and communication between them is prevented. A retainer is provided for the valve assembly in either of its end positions and a spring is positioned between the piston and each valve. An abutment is positioned between the piston and each valve and is adapted to cause movement of the valves before the piston has reached the end of its stroke.
REFERENCES:
patent: 629822 (1899-08-01), Shelburne
patent: 643467 (1900-02-01), Watson
patent: 1355208 (1920-10-01), Bossler
patent: 1470684 (1923-10-01), Cade
patent: 2445985 (1948-07-01), Weiner
patent: 2804055 (1957-08-01), Hill et al.
patent: 2985147 (1961-05-01), Rockwell
patent: 3838626 (1974-10-01), Carter
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