Patent ID: 7659647

Claim:
An actuator for converting a rotating motion into a linear reciprocating motion, comprising: a. a reversible electric motor having a stator having a housing, a rotor having an axis and housed in the housing of the stator, and a shaft having a forward portion and a rearward portion extending oppositely and coaxially from the rotor, respectively, wherein the rotor is rotatable relative to the stator; b. a transmission member coupled to the reversible electric motor for converting the rotating motion of the reversible electric motor into a linear reciprocating motion; c. a fan member coaxially attached to the forward portion or the rearward portion of the motor shaft such that the fan member is operable simultaneously with the rotor of the reversible electric motor; and d. an electromagnetic brake, comprising: (i). a brake frame having a first end portion and an opposite, second end portion and a body portion defined therebetween, wherein the body portion defines a chamber having an axis therethrough the first and second end portions; (ii). first and second magnets, wherein the first magnet is rigidly placed in the chamber by the first end portion of the brake frame, and wherein the second magnet is placed in the chamber by the second end portion of the brake frame and is movable between a first position to a second position in the chamber, wherein when the second magnet is in the first position, it is proximal to the first magnet, and when the second magnet is in the second position, it is distal from the first magnet; and (iii). a coil wound on the exterior surface of the body portion of the brake frame, configured such that when the electric motor is activated, the coil is energized, thereby causing the second magnet to move from the second position to the first position, and when the motor is deactivated, the coil is deenergized, thereby causing the second magnet to move from the first position to the second position, wherein the electromagnetic brake is positioned in relation to the fan member such that when the second magnet of the electromagnetic brake is in the first position, the fan member is rotatable with the rotor of the reversible electric motor, and when the second magnet of the electromagnetic brake is in the second position, the fan member stops rotating firmly, thereby causing the rotor of the reversible electric motor stops instantly.