Chair ride mechanism with tension assembly

Details Chair ride mechanism with tension assembly Chair ride mechanism with tension assembly

2007-08-17

2009-12-01

Nelson, Jr., Milton (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Back and seat adjust simultaneously

C297S342000

Reexamination Certificate

active

07625045

ABSTRACT:
A task chair, including a backrest assembly and a seat assembly pivotally coupled both to one another and to side portions of a fixed yoke member for synchronized movement, in which the seat of the seat assembly moves upwardly and forwardly concurrently with recline of the backrest of the backrest assembly. The chair further includes a tension assembly including an elongate tension member, such as a leaf spring, secured at one end thereof to the yoke member, and a contact member, such as a contact roller, adjustably mounted to the seat assembly. The contact member engages the tension member such that the tension member resists recline of the backrest assembly and concurrent movement of the seat assembly from their initial positions, and also provides a restoring force which tends to move the backrest to its initial upright position and the seat to its initial rearward and lowered position. The contact member is adjustable with respect to the tension member in order to vary the effective moment arm acting upon the tension member, thereby varying the pre-load of the tension member and the resistance provided by the tension member.

REFERENCES:
patent: 2471024 (1949-05-01), Cramer
patent: 2859799 (1958-11-01), Moore
patent: 3989297 (1976-11-01), Kerstholt
patent: 4429917 (1984-02-01), Diffrient
patent: 4861106 (1989-08-01), Sondergeld
patent: 4877291 (1989-10-01), Taylor
patent: 4984846 (1991-01-01), Ekornes
patent: 5005905 (1991-04-01), Sondergedl
patent: 5046780 (1991-09-01), Decker et al.
patent: 5251958 (1993-10-01), Roericht et al.
patent: 5308145 (1994-05-01), Koepke et al.
patent: 5577807 (1996-11-01), Hodge et al.
patent: 5725276 (1998-03-01), Ginat
patent: 5765804 (1998-06-01), Stumpf et al.
patent: 5909923 (1999-06-01), DeKraker
patent: 6109694 (2000-08-01), Kurtz
patent: 6250715 (2001-06-01), Caruso et al.
patent: 6412869 (2002-07-01), Pearce
patent: 6439661 (2002-08-01), Brauning
patent: 6523898 (2003-02-01), Ball et al.
patent: 6923503 (2005-08-01), Sangiorgio
patent: 6969116 (2005-11-01), Machael et al.
patent: 7234775 (2007-06-01), Serber
patent: 2002/0190553 (2002-12-01), Koepke et al.
patent: 2003/0127896 (2003-07-01), Deimen et al.
patent: 2003/0137171 (2003-07-01), Deimen et al.
patent: 2003/0178882 (2003-09-01), Schmitz et al.
patent: 2005/0275265 (2005-12-01), Deimen et al.

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