Inventor
OSTHUES ROBERT H
US3 patents
Patents
3 patentsUS5074522ADec 24, 1991
Ball valve having improved inherent rangeability
WORCESTER CONTROLS CORP61 citations93
US5117858AJun 2, 1992
Top entry ball valves with cam adjustable seats
WORCESTER CONTROLS CORP17 citations70
US4531273AJul 30, 1985
Method for fabricating graphite filled sintered metal seats for ball valves
WORCESTER CONTROLS CORP15 citations70