Fluid handling – Systems – Sequentially closing and opening alternately seating flow...
Patent
1976-02-05
1977-09-13
Nilson, Robert G.
Fluid handling
Systems
Sequentially closing and opening alternately seating flow...
13759612, F16K 1116
Patent
active
040475425
ABSTRACT:
A valve includes a pair of valving spools reciprocally disposed within a bore, with one valving spool movable to cut off application of fluid pressure from a pump to a steering yoke piston, and the other valving spool being movable to a position to relieve fluid pressure provided by the pump.
REFERENCES:
patent: 2607599 (1952-08-01), Kanuch
patent: 3339586 (1967-09-01), Tenkku
patent: 3605809 (1971-09-01), Thorson
May Czeslaw J.
Piepho Donald A.
Caterpillar Tractor Co.
Nilson Robert G.
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