Actuator assembly
US7533528B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 2005 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jan 14, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B7/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An actuator assembly (1) comprises a body (2) in which works an actuating piston (7), a first piston (5) and at least one second piston (6), a chamber (26) containing a substantially incompressible fluid by which each of the first and second pistons (5, 6) acts on the actuating piston (7). The movement of the first piston (5) from a retracted position to an extended position acts via the fluid to cause the actuating piston (7) to move from a retracted position to an operational position, and subsequent movement of a second piston (6) from a retracted position to an extended position acts via the fluid to cause an actuation movement of the actuating piston (7).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.