Synchrotilt chair with forwardly movable seat

Details Synchrotilt chair with forwardly movable seat Synchrotilt chair with forwardly movable seat

1997-10-24

1999-11-09

Nelson, Jr., Milton

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

2973034, 2973008, A47C 300

Patent

active

059799846

ABSTRACT:
A chair is provided having a base assembly with a particularly shaped housing and rigid upright side arms, a back frame pivoted to the base assembly for movement between upright and reclined positions, and a seat slidably supported on the base assembly and pivoted to the back frame so that the seat moves forwardly and its rear moves forwardly and downwardly with the back frame upon recline. A flexible back is connected to the back frame at top and bottom locations and is provided with lumbar adjustment for improved lumbar force/support and shape. A seat is provided with seat depth adjustment and with active and passive thigh flex support. A novel energy mechanism is provided that includes a moment arm shift adjuster for adjusting the spring tension on the back frame. The moment arm shift adjuster is readily adjustable and includes an overtorque device to prevent damage to components of the energy mechanism.

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Exhibit B is an ad entitled Stand Movement Co-ordination on its Head, disclosing an adustable new chair manufactured by Grammer, publication date being unknown, but prior to a filing date of the present application.
Exhibit A is a product brochure entiled Motion Chair Series, disclosing an adjustable chair made by Davis, the publication date being 1994.

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