Seatback spring device for automobile

Details Seatback spring device for automobile Seatback spring device for automobile

1986-04-24

1987-10-06

Zugel, Francis K.

Chairs and seats

Padded stool

Hassock type

297284, A47C 702

Patent

active

046978488

ABSTRACT:
A seatback spring device for automobiles comprising at least three spring elements of the wave-like form, any one of the spring elements being continuous in a basically longitudinal direction on a substantially common plane, the spring elements being laterally juxtaposed and directly or indirectly linked with a seatback frame at the upper and lower ends thereof, wherein the spring elements at both the sides are disposed so as to form a pair of forwardly flexed or curved planes, and each of the spring element(s) at the central area is provided with a protrusion protruding forwardly at a level corresponding to the waist of an occupant. The device fits to the waist of the occupant to relieve the burden upon waist and lumbar and secure the occupant against lateral swings and vibrations.

REFERENCES:
patent: 1576613 (1926-03-01), Kellogg
patent: 2177363 (1939-10-01), Flint
patent: 2274176 (1942-02-01), Widman
patent: 2722267 (1955-11-01), Liljeugren
patent: 2835312 (1958-05-01), Neely
patent: 3205010 (1965-09-01), Schick
patent: 3378299 (1968-04-01), Sandor
patent: 4037829 (1977-07-01), Crosby et al.
patent: 4283046 (1981-08-01), Bowles, Jr.
patent: 4588172 (1986-05-01), Fourrey et al.

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