Dual piston actuator

Details Dual piston actuator Dual piston actuator

F - Mech Eng,Light,Heat,Weapons

15

B

138/84.1

F15B 15/00 (2006.01) F16D 65/14 (2006.01) F16D 65/54 (2006.01)

Patent

CA 1183426

DUAL PISTON ACTUATOR ABSTRACT OF THE DISCLOSURE A pair of axially aligned and nested pistons (20,30) are mounted in a pressure sealed arrange- ment within the bore of a pressure housing (12). A primary piston (20) is moved in response to increasing pressure to provide an actuating output force while a secondary piston (30) simultaneously moves to overcome a reverse bias on it by a tension spring (40) and adds to the actuating force by engaging the primary piston (20) only when the pressure exceeds a specific higher threshold. The primary and secondary pistons thereafter operate in conjunction under the influence of high pressure to provide the output actuating force.

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