Chairs and seats – Bottom or back with means to alter contour – Providing support for lower back region
Patent
1994-09-12
1996-03-26
Nelson, Jr., Milton
Chairs and seats
Bottom or back with means to alter contour
Providing support for lower back region
297296, 2973015, A47C 714
Patent
active
055015077
ABSTRACT:
The chair has a lumbar support area which moves to follow the fore and aft movements of a person in the chair. The seat back includes two portions, namely an upper portion which is generally fixed in position relative to the seat assembly at any given point in time, and which is positioned so as to contact the upper back area of a person sitting in the chair, and a lumbar portion which is movable forwardly and rearwardly relative to the seat assembly and the upper portion. The lumbar portion is spring-biased forwardly from a position of general alignment with the upper portion, so that it follows the person's back as the person leans forward. Preferably, forward and rear stops are provided to limit the lumbar portion to movement between a rearward position in general alignment with the upper portion and a forward position which is at least somewhat rearward from the forward edge of the seat.
REFERENCES:
patent: 1182854 (1916-05-01), Poler
patent: 3121592 (1964-02-01), Anderson
patent: 3241879 (1966-03-01), Castello et al.
patent: 4162807 (1979-07-01), Yoshimura
patent: 4981325 (1991-01-01), Zacharkow
Armstrong R. Craig
Jr. Milton Nelson
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