US Patent 11028911 Actuator and applications of same

In one aspect of this invention, an actuator includes a motor having an output worm shaft, a transmission mechanism operatively coupled to the output worm shaft of the motor for converting a rotating motion of the motor into a linear reciprocating motion, a housing and mounting means for mounting the motor in the housing, where the transmission mechanism is devoid of a coil spring, and the mounting means is devoid of a foam plastic block.