Patent ID: 7950301

Claim:
A feed screw mechanism in which an internally threaded member fixed within an output rod is threadedly engaged with an externally threaded member, and said externally threaded member is operatively connected to a drive source at a first axial end of said feed screw mechanism, so that said output rod is moveable relative to said externally threaded member by rotating said externally threaded member relative to said internally threaded member, wherein said internally threaded member is coupled to said output rod by a coupling portion provided on said internally threaded member at a second axial end of said feed screw mechanism spaced apart from said first axial end of said feed screw mechanism, and wherein said internally threaded member is restrained in said output rod by a restraining portion formed on said output rod, said restraining portion disposed adjacent a portion of said internally threaded member proximate the second axial end of the feed screw mechanism.