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| Number | Title | Issue Date |
| 6935618 | Valve component with multiple surface layers A sliding component, particularly a disk valve plate. The sliding component includes a multi-layer surface structure comprising a strengthening layer harder than the substrate material, and an amorphous diamond top layer. ... | 08/30/2005 |
| 6904935 | Valve component with multiple surface layers A sliding component, particularly a disk valve plate. The sliding component includes a multi-layer surface structure comprising a strengthening layer harder than the substrate material, and an amorphous diamond top layer. ... | 06/14/2005 |
| 4725042 | Ball valve assembly A ball valve assembly employing valve seats which are constructed of teflon and form part of end seal members, with the teflon valve seats being of a thin and deformable arrangement backed by an elastic loading ring which is isolated from the liquid. The ... | 02/16/1988 |
| 4650152 | Automatic shut-off valve for welding electrode coolant systems A valve for controlling the flow of a liquid coolant in a circuit interconnecting several hollow welding electrodes with a pressurized coolant source has dual ball check valves in the supply and return lines respectively and a spring and pressure responsi... | 03/17/1987 |
| 4456063 | Flow diverter Apparatus adapted for connection to a drilling conduit beneath a drilling rig floor for diverting pressurized well bore fluid in the conduit from the rig and sealing the annulus between a pipe or other object and the conduit or closing the conduit in the ... | 06/26/1984 |
