Patent ID: 8555431

Claim:
An item of furniture which comprises: a frame, a first adjustable section pivotally attached to the frame, a first pivot shaft connected to said frame for pivoting said first adjustable section relative to the frame, said first pivot shaft including a first arm, a linear actuator which includes a housing with a bushing means for the first pivot shaft, a first spindle, a first electric motor for rotating the first spindle, and a first spindle nut on said first spindle, said first spindle nut being prevented from rotation so as to move along said first spindle based on rotation direction of said first spindle, said first spindle nut having an end face which is generally perpendicular to said first spindle and defines a first notch therein, an upperside, an underside, and a first roller mounted in said first notch next to said underside, said first spindle nut being located in the housing such that the upperside thereof is located closest to the bushing means and the underside thereof farthest from the bushing means, and wherein the first pivot shaft extends in the bushing means of said housing, and said first arm of the first pivot shaft includes a first leg which has a distal end that rests against said first roller, said first roller being contacted on a periphery thereof only by said first leg.