Height adjustment for the backs of chairs

Details Height adjustment for the backs of chairs Height adjustment for the backs of chairs

1994-10-17

1996-09-03

Nelson, Jr., Milton

Chairs and seats

Movable back

2974631, A47C 100

Patent

active

055517544

ABSTRACT:
A height-adjusting mechanism for the back rests of chairs, where the back rest comprises a back plate, which may be padded, connected to a fastening element that slides lengthwise on a back rest carrier and the back rest carrier and the fastening element are clamped together. The mechanism comprises a clamping body on the side of the fastening element that is opposite the back plate. The clamping body has at least one continuous hole or slot. The end of at least one anchor passes through a hole or slot of the fastening element, where it is held by undercuts, while the other end of the anchor passes through the clamping body and is connected via a hole and a bolt with a lever. The lever is pivotably mounted about the bolt and has a lug. The lug can be swivelled between the bolt and the clamping body, by which the tractive force applied to the anchor and the pressure applied at the same time to the clamping body lock the fastening element and the back rest carrier to each other.

REFERENCES:
patent: 1336510 (1920-04-01), Collier
patent: 3526430 (1970-09-01), Eldon
patent: 4236609 (1980-12-01), Carlson
patent: 4596484 (1986-06-01), Nakatami
patent: 4616877 (1986-10-01), Slaats et al.
patent: 4647108 (1987-03-01), Hayashi
patent: 5007678 (1991-04-01), DeKraker
patent: 5035466 (1991-07-01), Mathews et al.
patent: 5232265 (1993-08-01), Estkowski et al.
patent: 5382077 (1995-01-01), Stumpf et al.

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