Actuator assembly
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United States of America Patent
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-
May 19, 2009
Grant Date -
Jan 10, 2008
app pub date -
Jun 8, 2005
filing date -
Jun 9, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
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).
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