Patent ID: 7786633

Claim:
An electric motor used in a device comprising: a stator comprising one or more stator conductors for carrying a current when power is applied; a rotor comprising one or more permanent magnets for producing a magnetic field, wherein the one or more stator conductors interact with the magnetic field when the power is applied to purposely generate a force acting upon the rotor relative to the stator having an axial component and a circumferential component; and a shaft connected to the rotor wherein the shaft travels along a rotor axis with the rotor in an axial direction from a rest position when the power is applied, under an action of the axial component of the force, and retracts when the power is removed under an action of a biasing force from a tension device when the axial component of the force is no longer present, and wherein the shaft rotates with the rotor under an action of the circumferential component of the force when the power is applied.