Chairs and seats – Back movement resiliently opposed in operating position – Constantly oriented during up-and-down movement
Patent
1976-01-13
1977-12-13
Frazier, Roy D.
Chairs and seats
Back movement resiliently opposed in operating position
Constantly oriented during up-and-down movement
297374, A47C 7027
Patent
active
040625877
ABSTRACT:
A pivotally mounted back support for a chair is disclosed incorporating a pivotal mounting utilizing a plurality of interleaved clutch plates. Alternate ones of the clutch plates are stationary and the remainder are connected to the lower end of the back support post to pivot with the post about a common pivot shaft. Locking of the fore and aft pivotal position of the back is effected by squeezing together the clutch plates to provide a surface-to-surface frictional bond. Springs urge the post into erected position. A handle, readily accessible to a person seated on the chair is provided to effect locking and release of the clutch and thus pivotal adjustment of the position of the back.
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Frazier Roy D.
Herman Miller Inc.
Lyddane William E.
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