Patent ID: 6772653
Filing Date: 2004-08-10
Classification: E05F,E05Y,F16H,Y10T

Abstract:
A linear actuator comprising:a motor housing having one end fitting, a motor housed in the motor housing, a reduction gearbox housed in the h sing, the motor being connected to an input of the gearbox, a telescope arm, having an outer tube attachable to the motor housing, an inner tube having another end fitting, an extension screw contained within the telescopic arm and the motor housing and having a driven end journalled at the motor housing end of the outer tube and engaging a nut fast at the proximal end of the inner tube, rotation of the screw causing the inner tube to extend or retract with respect to the outer tube, characterised in that the linear actuator further comprises:an engageable connection of an output of the reduction gearbox and the driven end of the extension screw for transmitting drive from the gearbox to the extension screw for extension and retraction of the inner tube.