| 摘要 |
<p>A two-stage slave cylinder (10) including a housing and a bore (14) extending within the housing. An outer piston (20) is slidably positioned within the bore in the housing, and an outer piston chamber is defined by the bore and the outer piston. The outer piston chamber is connected to a hydraulic fluid source by a fluid passageway (24). A biasing mechanism (40) acts to bias the outer piston in an unactuated position unless a force is exerted on the outer piston that is greater than the biasing force. A bore (26) is provided in the outer piston, and an inner piston is slidably positioned therein. An inner piston (42) chamber is defined by the bore and the inner piston, and an opening (34) is provided in the outer piston to connect the outer piston chamber to the inner piston chamber. A valve assembly (56) is provided within the opening in the outer piston to control the flow of fluid between the outer piston chamber and the inner piston chamber.
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