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Inventor

HOLLISTER F HAROLD

US10 patents
⚠️ This page may combine multiple inventors who share the name “HOLLISTER F HAROLD”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

JOY MFG CO

4 patents
US4650225AMar 17, 1987

Hydraulic holddown screw with mechanical retention means

JOY MFG CO30 citations92
US4570942AFeb 18, 1986

Dual diameter valve stem packing

JOY MFG CO47 citations92
US4515174AMay 7, 1985

Gate valve with internal pressure relief means

JOY MFG CO23 citations81
US4575106AMar 11, 1986

High pressure sealing connection with metal seal

JOY MFG CO2 citations62

GILMORE VALVE CO

3 patents
US6257268B1Jul 10, 2001

Pressure biased shuttle valve

GILMORE VALVE CO155 citations96
US6318400B1Nov 20, 2001

Low interflow hydraulic shuttle valve

GILMORE VALVE CO40 citations92
US6655405B2Dec 2, 2003

BOP operating system with quick dump valve

GILMORE VALVE CO34 citations90

GILMORE VALVE CO LTD

2 patents
US6651696B2Nov 25, 2003

Relief valve

GILMORE VALVE CO LTD50 citations92
US6779543B2Aug 24, 2004

BOP operating system with quick dump valve

GILMORE VALVE CO LTD26 citations90

NAT COUPLING CO INC

1 patent
US7976075B2Jul 12, 2011

Probe seal having spring-energized sealing elements for female hydraulic coupling member

NAT COUPLING CO INC5 citations62