Patent ID: 6013040
Filing Date: 2000-01-11
Classification: A61H

Abstract:
A power driven lumbosacral backrest controlled by the user and comprising, in combination:(a) A rigid foundation frame having a top, bottom and first and second edges;(b) a pair of slots disposed along said first and second edges of said foundation frame;(c) a spindle including a shaft with end guides at each end of said shaft, said spindle and shaft disposed transversely of said foundation frame, said end guides engaging said first and second slots respectively;(d) a motor and reduction gear located on said spindle, said motor and reduction gear connected to a toothed wheel via an extending right angled shaft;(e) a series of undulating forms formed parallel with said first and second slots, over which travel respective plungers, said plungers carried by said spindle;(f) a spindle drive block formed adjacent to one of said undulating forms such that when said motor is actuated, said toothed wheel travels back and forth across said drive block, whereby said plungers follow said undulating forms via said spindle traveling in said slots, creating a massage action.