Gm Global Technolgoy Operations, Inc.

John H Heidorn

James A Bernard

A power-operated vertically adjustable shelf is supported by shelf arms in cantilevered fashion at the rear of an appliance cabinet by a gear and roller on each shelf arm, with each gear and roller vertically offset engaging a vertically extending toothed rack and a roller track. Electric drive means, carried by the cabinet, powers a vertically extending drive shaft of which the torque is transmitted to the shelf operating gear through a normally disengaged clutch which is engaged by user operating means adjacent the front of each shelf whereby powered vertical movement of the shelves is achieved. A dual position selector shelf switch is operable upon opening the door to permit the user to select up or down power shelf movement with the shelf switch being neutralized upon closing of the cabinet door.

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Dayton, OH, United States of America

John H Heidorn