Patent ID: 8408083
Filing Date: 2013-04-02
Classification: A47B,F16H,Y10T

Abstract:
1. A lifting column which comprises: a first section, a second section, an intermediate section located between said first section and said second section, and a linear actuator, said linear actuator comprising an outer profile, a spindle mounted at an upper end of the outer profile, a transmission connecting the spindle with a reversible electric motor, a spindle nut secured against rotation on the spindle, an intermediate profile mounted with one end thereof on the spindle nut, a first guide at a lower end of the outer profile for the intermediate profile, a cord element secured at the lower end of the outer profile and connected via a guide with an inner profile so that the inner profile together with the intermediate profile is telescopically pushed out of and into the outer profile by the rotation of the spindle, wherein the inner profile is secured against rotation on the intermediate profile, and the rotational securing of the spindle nut is constituted by longitudinal guides in the outer profile, so that the spindle nut with the intermediate profile moves on the spindle by the rotation thereof, said outer profile of said linear actuator being attached to said first section of said lifting column, said inner profile of the linear actuator being attached to the second section of said lifting column, and said intermediate profile of said linear actuator being attached to said intermediate section of said lifting column.