Chairs and seats – Movable bottom – Tiltable
Patent
1981-05-18
1984-06-26
Lyddane, William E.
Chairs and seats
Movable bottom
Tiltable
297 83, 297361, A47C 1032
Patent
active
044562977
ABSTRACT:
A dental chair has its backrest connected to the seat by a scissor linkage arrangement which effects the moving together of the contiguous portions of the backrest and seat concurrently with movement of the backrest from an upright to a reclined position.
REFERENCES:
patent: 2746520 (1956-05-01), Ducrot
patent: 2925852 (1960-02-01), Lorenz
patent: 3865432 (1975-02-01), Rogers, Jr. et al.
patent: 4200332 (1980-04-01), Branning
Lipp Herbert
Pietschmann Helmut
Bird Robert J.
Gerlach Robert A.
Lyddane William E.
Sybron Corporation
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