Adjustable backrest for the seats of vehicles, particularly cars

Details Adjustable backrest for the seats of vehicles, particularly cars Adjustable backrest for the seats of vehicles, particularly cars

1989-12-22

1990-11-06

Brown, Peter R.

Chairs and seats

Bottom or back with means to alter contour

297460, A47C 746

Patent

active

049680935

ABSTRACT:
A backrest for vehicle seats includes an inverted U-shaped frame having an upper cross bar, two side arms having spaced apart lower ends and a shaft rotatably mounted between the lower ends. A plurality of flexible vertically disposed parallel strips are secured to the frame adjacent the upper end thereof. The strips have a generally S-shaped configuration with a lower forwardly convex curve for supporting the lumbar region of the back and an upper forwardly concave curve for supporting the upper dorsal region. A transverse support is connected to each of the strips intermediate the curves and the lower ends of the strips are connected to a flexible transverse member which in turn is connected to a bracket on the shaft so that upon rotation of the shaft the lower ends of the flexible strips will be compressed to vary the curvature of the lower curve.

REFERENCES:
patent: 2843195 (1958-07-01), Barvaeus
patent: 3762769 (1973-10-01), Poschel
patent: 4153293 (1979-05-01), Sheldon
patent: 4601514 (1986-07-01), Meiller

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