Fluid actuators
US5529030A · kind A · utility
Inventor
Key dates
| Filing date | Feb 18, 1994 |
| Grant date | Jun 25, 1996 |
| Priority date | — |
| Expiry date | Feb 18, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M59/105
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid actuated engine valve assembly comprising a fluid actuator (10) including a chamber (14) in which a piston assembly (17) reciprocates. The piston assembly (17) includes a pair of spaced pistons (18,19) which divide the chamber (12) into three sections (20 21,22) and a passageway (29) which supports a slide valve member (30). Movement of the slide valve member (30) in one direction causes fluid to be directed to the chamber section (20) to cause movement of the piston assembly (14) in one direction. Movement of the valve member (30) in the opposite direction vents the chamber (20) and permits spring (34) and/or spring (42) to move the piston assembly 17 in the opposite direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.