Abstract: A linear actuator includes a hollow housing that is formed from a first portion and a second portion. The first portion of the housing is formed to support all of the components of the linear actuator therein, while the second portion of the housing functions to retain such components in the first portion of the housing. An end cap is secured to the end of the elongated tube portion to close the housing. The linear actuator includes a motor that operates through a clutch assembly to selectively rotate a screw. The clutch assembly limits the amount of torque that can be transmitted from the motor to the screw assembly. A nut is mounted on the screw assembly for linear movement in response to rotation of the screw assembly. An extension tube is crimped onto the nut for effecting linear movement of a workpiece. The structure of the nut is designed to facilitate an improved crimping connection between the nut and the extension tube.

Abstract: An electric motor housing having a peripheral frame member, a central motor mounting member and strut members connecting and supporting the frame member and motor mounting member. The peripheral frame member defines a receptacle having an open mouth for receiving a terminal block assembly in a sliding manner. The receptacle also defines a lateral aperture for access to the terminal block. At least one of the strut members defines a longitudinal channel communicating at one end with the open mouth and at its other end with means for access to an electric motor when mounted on the motor housing.

Abstract: A DC brushless motor is provided in which the stator has a central annular portion defining a central aperture, a plurality of winding core members which extend radially from the central annular portion and a plurality of intermediate core members which extend radially from the central annular portion and are positioned intermediate the winding core portions. A single stator winding extends around the winding core portions. The coils of the winding on adjacent winding core portions are wound in opposite directions electrically. A control circuit is provided for simultaneously exciting all of the winding coil portions and for electrically reversing the exciting current as a function of the rotational position of the rotor.A Hall sensor is positioned intermediate a winding core portion and an intermediate core portion and is connected to the control circuit for detecting the rotational position of the rotor with respect to the stator.