Chairs and seats – Back movement resiliently opposed in operating position – Back and bottom adjust in a fixed relationship
Patent
1987-02-09
1989-01-10
Zugel, Francis K.
Chairs and seats
Back movement resiliently opposed in operating position
Back and bottom adjust in a fixed relationship
297304, 248608, A47C 300
Patent
active
047969504
ABSTRACT:
The seat and pedestal of a chair are joined by a knee-tilt mechanism which includes a first support fixed to the underside of the seat adjacent the front edge thereof, and a second support fixed to the pedestal and having a sidewardly extending support tube arrangement. The first support has bearing hubs rotatably engaged with the support tube to define a horizontal tilt axis. A restoring mechanism is disposed within the second support for exerting a restoring torque about the tilt axis for urging the seat toward its horizontal position. The restoring mechanism, in the preferred embodiment, employs a sleevelike spring member of an elastomeric material disposed on the tilt axis for developing a restoring torque which generally linearly increases as the seat tilts away from the horizontal position. A second spring coacts between the supports for generating a second restoring torque which is additive with the first torque to effectively cause a torque dwell to facilitate tilting beyond an intermediate position.
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Herman Miller Brochure: "Equa A Chair For People Who Can't Sit Still" 1984 16 pages.
Herman Miller Brochure: "Equa Seating", 1985, 15 pages.
Herman Miller Brochure: "We Hope You Enjoy Your New Equa Chair", 1984, 1 page.
Herman Miller Magazine, "From Equa Seating to Seafood Linguini", pages 31-36.
Cool Donald L.
Liebertz Fred C.
Mrotz, III Walter C.
Haworth Inc.
Zugel Francis K.
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