Vehicular seat lumbar support device

Details Vehicular seat lumbar support device Vehicular seat lumbar support device

1989-11-24

1991-04-16

Chen, Jose V.

Chairs and seats

Bottom or back with means to alter contour

297460, A47C 300

Patent

active

050076779

ABSTRACT:
A vehicular seat is formed with an adjustable spring structure at an internal portion thereof. The structure is selectively adjustable for determining the degree of support the seat occupant receives at his or her lower back and features an arrangement which is supported on the end of a pair of adjustable crank arms so as to be operable between a normal position in which the support to the lower back of the seat occupant is mildly enhanced, and an extra support position in which the seat back contour is altered and the support of the seat occupant's lower back is greatly enhanced in a manner which reduces fatigue of the seat occupant over long periods.

REFERENCES:
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patent: 4588172 (1986-05-01), Fourrey et al.
patent: 4682763 (1987-07-01), Kazaoka et al.
patent: 4692848 (1987-10-01), Hattori et al.
patent: 4715653 (1987-12-01), Hattori et al.
patent: 4725095 (1988-02-01), Benson et al.
patent: 4830429 (1989-05-01), Petitjean
patent: 4886316 (1989-12-01), Suzuyama et al.

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