Control device of a large hydraulic distributor, in particular f

Details Control device of a large hydraulic distributor, in particular f Control device of a large hydraulic distributor, in particular f

1976-06-01

1978-06-06

Nilson, Robert G.

Fluid handling

Systems

Supply and exhaust

91445, 91447, F15B 1108, F15B 13042

Patent

active

040930025

ABSTRACT:
The present invention relates to a control device for a controlled non-return valve provided in large hydraulic distributors. During the mode of operation where the double acting hydraulic ram is in a non-movable state, a means is utilized to communicate a control pressure to the one-way non-return check valve to positively maintain the check valve in a closed state thereby eliminating the accidental opening of the return valve and maintaining the double acting hydraulic ram in its initial position.

REFERENCES:
patent: 3805678 (1974-04-01), Bianchetta
patent: 3972267 (1976-08-01), Haak
patent: 4000683 (1977-01-01), Schexnayder

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