Chair with spring actuated rear legs to minimize muscle strain

Details Chair with spring actuated rear legs to minimize muscle strain Chair with spring actuated rear legs to minimize muscle strain

2008-07-10

2010-12-14

Dunn, David (Department: 3636)

Chairs and seats

Movable bottom

Tiltable

C297SDIG010, C297S271500

Reexamination Certificate

active

07850239

ABSTRACT:
A chair to minimize muscle strain as a person sits in or rises providing an identical pair of elongated parallelepiped back frames having a vertically extending upper portion, a rearwardly extending lower portion with a parallelepiped connection member extending perpendicularly therebetween to connect the back frames. A parallelepiped crossbar extends between a pair of front legs. A spring assembly having a parallelepiped upper mount member, a parallelepiped lower mount member, and a single coil spring therebetween is secured to the lower edge of the back frame lower portion. The selective placement of a user's weight upon the seat positions the spring into either a compressed state, wherein the seat is parallel to a floor surface, or an uncompressed state, wherein the seat is at an angle to the floor surface.

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patent: 6056353 (2000-05-01), Meara
patent: 6871911 (2005-03-01), Alexander, Jr.
patent: 7073860 (2006-07-01), Markus

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