Power and manually actuated lumbosacral backrest

Details Power and manually actuated lumbosacral backrest Power and manually actuated lumbosacral backrest

1986-01-30

1988-02-02

Zugel, Francis K.

Chairs and seats

Bottom or back with means to alter contour

297460, A47C 300

Patent

active

047225696

ABSTRACT:
An improved lumbosacral backrest having a back engaging contour which is adjustable under power or manual operation to accommodate users' backs which vary widely in configuration and dimension. It has a contour defined by a segmented regulator spindle inserted between a foundation frame and resilient back support, the regulator spindle being adjustable along the back support and adapted to define a transverse plane of rigidity at the proper level and shape to provide comfortable support for the individual user's back.
The backrest includes appropriate power means for actuating the regulator spindle to effect massaging action on the lumbosacral region of the back.
It further includes manual means for adjusting the regulator spindle and which is operable when the power means for effecting massaging action has been deenergized.

REFERENCES:
patent: 2049550 (1936-08-01), Van Dresser et al.
patent: 3196868 (1965-07-01), Johnston
patent: 3250569 (1966-05-01), Gaffney
patent: 3642319 (1972-02-01), Berchicci
patent: 4465317 (1984-08-01), Schwarz
patent: 4541670 (1985-09-01), Morgenstern et al.

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