Patent ID: 8336409

Claim:
An apparatus comprising: a housing having a tapered bore extending therein along an axis thereof; a piston having a tapered outside wall sufficient for mating with the tapered bore of the housing and for radial and longitudinal movements within the tapered bore about a rotational axis of the piston; a shaft connected to the piston for movement along a longitudinal axis thereof, wherein the axes of the tapered bore and piston are generally aligned along the longitudinal axis; and a first set of magnets embedded within the outside wall of the piston; and a second set of magnets embedded within a surface of a wall forming the bore of the housing, wherein a polarity for each of the magnets provide an attracting and repelling forces causing rotation of the piston relative to the housing and a linear movement of the shaft along the longitudinal axis; and a power assist operable with the shaft for providing a rotary motion thereto; wherein a longitudinal length of the piston is sufficiently greater than a longitudinal length of the housing proximate the bore for enhancing the magnetic forces imposed on the magnets of the piston by the magnets within the housing.