Patent ID: 6300732
Filing Date: 2001-10-09
Classification: A47C

Abstract:
A dual power unit for movement of a back and a footrest in a power-driven armchair, comprising an elongated casing (11) which, close to each end, has a transverse-movement shaft (12) which is connected to a shaft (13) of an electric motor reducer trough a transmission-gear (15), the transmission-gear comprising a screw (16) connected to the shaft (13) of the motor reducer and extended transversely of the movement shaft (12) and longitudinally of the casing and a threaded sliding slider (17) into which the screw is screwed down, cam means being integral with the movement shaft and bearing on the slider for converting the sliding movement of the slider along the screw into an angular-rotation movement of the movement shaft, characterized in that the screw (16) thoroughly crosses the slider (17) and in that the cam means comprises two cam elements (19, 20) laterally projecting from the movement shaft for resting on thrust surfaces (21, 22) provided on the slider, on opposite sides of the screw.