Inventor

WILLIAMS ARTHUR J

4 patents

Patents

4 patents

US4361169ANov 30, 1982

Pressure compensated control valves

COMMERCIAL SHEARING18 citations69

US4352375AOct 5, 1982

Control valves

COMMERCIAL SHEARING13 citations69

US4262915AApr 21, 1981

Low friction drag seals

COMMERCIAL SHEARING18 citations69

US4237769ADec 9, 1980

Relief valves and mine props incorporating the same

COMMERCIAL SHEARING4 citations58