Inventor
PETRO JOHN D
9 patents
Patents
9 patentsUS4777981AOct 18, 1988
Magnetic detent joy stick and stack remote control valves
COMMERCIAL SHEARING39 citations91
US4682939AJul 28, 1987
Gear pump or motor with tooth tips of dissimilar metal
COMMERCIAL SHEARING45 citations91
US4187877AFeb 12, 1980
Compensated work port fluid valves
COMMERCIAL SHEARING21 citations80
US4519419AMay 28, 1985
Hydraulic valves
COMMERCIAL SHEARING12 citations72
US4519420AMay 28, 1985
Hydraulic valves
COMMERCIAL SHEARING10 citations72
US4058135ANov 15, 1977
Compensated work port fluid valves and work port compensators
COMMERCIAL SHEARING10 citations72
US4569367AFeb 11, 1986
Hydraulic valve inlet unloaders
COMMERCIAL SHEARING5 citations61
US4194366AMar 25, 1980
Two speed valves and bi-directional motor system
COMMERCIAL SHEARING2 citations61
US4338962AJul 13, 1982
Control and relief valves
COMMERCIAL SHEARING3 citations57