Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent
1987-06-12
1988-06-21
Dorner, Kenneth J.
Chairs and seats
Back movement resiliently opposed in operating position
Constantly oriented during up-and-down movement
248578, 267154, 297301, 297303, 297326, A47C 1024, A47C 3026
Patent
active
047521015
ABSTRACT:
A tilt control arrangement for office furniture chairs of the type having a chair seat structure mounted on a supporting base for rearward and forward tilting movement of the chair seat about an essentially horizontal axis extending essentially crosswise of the seat. The tilt control arrangement comprises a bifurcated seat structure mounting member defining a pair of parallel arms for pivotally mounting the seat structure for its tilting movement. Depending from the underside of the chair seat structure 15 a lug that projects below the level of the chair seat tilt axis. A front to rear extending rod member extends freely through the chair seat lug to have its rear end threadedly engaged with a nut anchored to the chair base, and the rod member having its forward end headed. A resiliently elastomeric cylindrical body is made fast to the rod member only at the rod member head, with the elastomeric body being placed in compression between the rod member head and the seat lug. Compression of the body can be adjusted by rotating the elastomeric body to adjust the tilting resistance of the seat.
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Sun Rickson
Yurchenco James R.
Allsteel Inc.
Brown Peter R.
Dorner Kenneth J.
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