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| Number | Title | Issue Date |
| 6807893 | Jacket-assembly and method for protecting hydraulic elevator jacks A jacket-assembly is sealed to a hydraulic elevator jack to protect the jack from corrosion. The jacket-assembly is preferably manufactured from a non-galvanic, non-corrosive material. The jacket may be manufactured from any non-galvanic, non-corrosive material that... | 10/26/2004 |
| 6427575 | Jacket-assembly and method for protecting hydraulic elevator jacks A jacket-assembly is sealed to a hydraulic elevator jack to protect the jack from corrosion. The jacket-assembly is preferably manufactured from a non-galvanic, non-corrosive material, such as high density polyethylene tubing. The jacket may be manufactur... | 08/06/2002 |
| 5456160 | Method for reducing seal stiction in a hydraulic cylinder A method of reducing seal stiction in a hydraulic cylinder is provided comprising the steps of providing a hydraulic cylinder, having a housing, a piston, and a seal, providing apparatus for rotating the seal about the piston, and rotating the seal about ... | 10/10/1995 |
| 5381822 | Relief valve with hydraulic fuse A relief valve for the hydraulic fuse minimizes the chance of a device such as a hydraulically powered lift device from collapsing upon a break in a hydraulic input line to a cylinder powering the lift. The relief valve comprises a valve seat biased in a ... | 01/17/1995 |
| 4442757 | Fluid pressure actuator having bias element immersed in non-corrosive environment An improved valve actuator is provided for employment in environments such as subterranean wells where highly corrosive gases and fluids are contained in the well fluid which is normally pressurized and employed to operate the actuator. The bias element o... | 04/17/1984 |
| 4316316 | Shipping assembly for a hydraulic jack A shipping assembly for a hydraulic jack in which the cylinder of the jack is shipped in sections. First and second shipping caps are fastened to predetermined ends of the cylinder sections during shipment, with the first shipping cap utilizing certain of... | 02/23/1982 |
