Chairs and seats – Bottom or back with means to alter contour
Patent
1987-06-10
1988-12-20
Zugel, Francis K.
Chairs and seats
Bottom or back with means to alter contour
297311, 297337, 297320, 248592, A47C 300
Patent
active
047921854
ABSTRACT:
A seat device having a cushion supported to be movable up and down to damp vibration, characterized in that the seated portion of the cushion is divided into front, center and rear parts which are connected bendably with one another, that one of the front and rear parts of the seated portion is pivoted on a fixed member while the other is swingably and slidably supported by a fixed member, that swinging arms are projected downward from the front and rear parts of the seated portion, and that a cushion spring for urging the center part of the seated portion upward is stretched between the front ends of the swinging arms.
REFERENCES:
patent: 2724428 (1955-11-01), Sellner
patent: 3337266 (1967-08-01), Burns
patent: 3359035 (1967-12-01), Schiffman
patent: 3724797 (1973-04-01), Freitag et al.
patent: 4124248 (1978-11-01), Mayer
patent: 4241894 (1980-12-01), Okuyama
patent: 4636000 (1987-01-01), Nishino
patent: 4636002 (1987-01-01), Genjiro
patent: 4673212 (1987-06-01), Mayer
Ikeda Bussan Co.
Zugel Francis K.
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