Chairs and seats – Back movement resiliently opposed in operating position – Back and seat adjust simultaneously
Patent
1981-06-08
1984-10-30
Zugel, Francis K.
Chairs and seats
Back movement resiliently opposed in operating position
Back and seat adjust simultaneously
297304, 297321, A47C 300
Patent
active
044796790
ABSTRACT:
A chair control in which the chair occupant's body weight is the primary source of energy in reclining the chair and returning the chair to its task position includes a back support link and a front link, each pivotally mounted to a base link. A seat support link is pivotally mounted to and between the front link and the back support link. Pivoting of the links is restrained so that the front link extends upwardly and forwardly from said stationary link. The occupant's weight exerts a downward force on the front link, which exerts a forward force on the seat support link, which in turn exerts a forward force on the back support link providing a task position chair back support. A rearward force exerted on the back support link, as when the occupant reclines is partially counterbalanced by the above described forward force on the back support link so that no additional biasing means are necessary. The preferred embodiment includes biasing means to return the unoccupied chair control to the task position.
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Faiks Frederick S.
Fries Bernard J.
Korell Donald D.
Steelcase Inc.
Zugel Francis K.
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