Fluid handling – Systems – Supply and exhaust
Patent
1977-07-07
1979-05-15
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
91446, 137596, 251282, F15B 1304
Patent
active
041542614
ABSTRACT:
A direction control valve of pressure compensated or load responsive type for use with positive or negative load controllers which maintain a constant pressure differential between selected valve chambers. Controllers are connected to the valve bore by pressure sensing passages which are blocked in the neutral position of the valve spool. Displacement of the valve spool from its neutral position in a sequential manner connects first a valve load chamber to the pressure signal passage and the valve controller and then upon further displacement of the valve spool connects the load chamber with one of the other valve chambers. The sequence of these connections and distance of travel of valve spool to accomplish these connections can be varied.
REFERENCES:
patent: 3881512 (1975-05-01), Wilke
patent: 3951162 (1976-04-01), Wilke
patent: 4020867 (1977-05-01), Sumiyoshi
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