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Recliner chair lift base assembly

  • US 4,993,777 A
  • Filed: 10/18/1989
  • Issued: 02/19/1991
  • Est. Priority Date: 05/20/1988
  • Status: Expired due to Term
First Claim
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1. A lift base assembly for use with upholstered recliner chairs and the like to provide means for elevating and tilting the chair, said assembly comprising a stationary rectangular lower frame adapted to rest on a floor, a movable rectangular upper frame, said upper frame providing means on which a chair may be mounted, a lift bar member pivoted at one end to a central portion of the lower frame and extending longitudinally forwardly from said pivot, the other and front end of said lift bar member being pivoted to the front end of the upper frame, an electric motor having a rotary screw shaft, said motor being pivoted to a rear portion of said lower frame for arcuate motion of said screw shaft in a vertical plane, a pivot bracket on said lift bar and extending upwardly within the confines of the upper frame when the lift assembly is in lowered position, a screw shaft nut pivoted to an upper portion of said pivot bracket on a pivot axis parallel to and located between the pivot axes of the lift bar pivots to the lower frame and the upper frame, said screw shaft extending through and having a threaded connection with said nut whereby rotation of the screw shaft produces longitudinal movement of the nut along the length of the screw shaft and pivoting of the lift bar, longitudinal movement of the nut toward the rear producing elevation of the upper frame and longitudinal movement of the nut toward the front producing lowering of the upper frame, and tilt means connected to the upper frame producing pivoting of the upper frame about the pivot axis of the lift bar pivot to the upper frame when the upper frame is elevated or lowered.

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