Thrust device using hydraulic jacks

Details Thrust device using hydraulic jacks Thrust device using hydraulic jacks

1978-08-07

1981-02-03

Maslousky, Paul E.

Motors: expansible chamber type

Cyclically operable

Working member controlled motive fluid for distributor motor

91313, 91321, F01L 2506, F01B 718

Patent

active

042481368

ABSTRACT:
The invention relates to a thrust device using a plurality of hydraulic jacks, and to the automatic control of a plurality of thrust jacks.
Two differential jacks have resetting chambers which are permanently under hydraulic pressure. Associated with each jack there is a self-locking piloted valve placed in the active position by a push-rod at the end of a work stroke of the piston of the jack and restored into the inactive position by a piloted valve actuated by a push-rod 39 at the end of the return stroke of the piston to its starting position. In the active position the self-locking piloted valve controls the isolation from the supply of all the work chambers and the venting of the associated work chamber 14.

REFERENCES:
patent: 1987003 (1935-01-01), Dole
patent: 2890658 (1959-06-01), Hjarpe
patent: 3225663 (1965-12-01), Pelisson

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