Patent ID: 6688211
Filing Date: 2004-02-10
Classification: B25B,F15B

Abstract:
A dual linear actuator comprising:an outer tubular housing having open first and second ends and also having a bore extending therethrough; an inner tubular housing being securely disposed in said bore of said outer tubular housing and having open first and second ends and also having a bore extending therethrough; a first cap being removably attached to said first ends of said outer and inner tubular housings; a second cap having a side wall and being removably attached to said second end of said inner tubular housing; a third cap having a side wall and being removably attached to said second end of said outer tubular housing; a first piston assembly including a tubular piston rod being movably disposed in said bore of said outer tubular housing, said first piston assembly also including first piston member being attached to an exterior of a wall and near a first end of said tubular piston rod, and further including first seal members being engaged between said first piston member and said inner and outer tubular housings, and also being engaged between said side wall of said third cap and said inner tubular housing to prevent leakage of fluid from said outer tubular housing, said first piston assembly also including first bearings being attached to said third cap and to said inner tubular housing and through which a wall of said tubular piston is movable; and a second piston assembly including a piston rod member being movably disposed in said bore of said inner tubular housing.