Ergonomic chair
First Claim
1. A chair comprising a base, at least a fixed stem extending vertically from the base, a track platform mounted at the top of the stem, a carriage mounted on the track platform for sliding movement in a convex arc relative to the carriage, one of the carriage and track platform mounting a track including at least a pair of bearing races provided in the forward and rearward directions, and the other of the carriage and track platform including bearings adapted to roll in the bearing races in the track, a seat pan mounted on the carriage for movement about fixed pivot in an axis at right angles to the direction of the bearing races, and resilient means associated with the seat pan to resist the pivoting movement of the seat pan.
2 Assignments
0 Petitions
Accused Products
Abstract
A chair adapted to passively adjust itself to be in equilibrium with the user'"'"'s body in relation to changes in the center of gravity and thigh inclination. The chair includes a post from which is provided, in one embodiment, a convex track on which a carriage is allowed to travel, and a seat pan is pivoted on the carriage for angle adjustment relative to the carriage. In another embodiment, a first concave track is provided on the top of the post with a carriage slidable in the concave track and a seat pan mounted for travel in a track on the carriage wherein the second concave track has a smaller radius than the first track.
41 Citations
10 Claims
- 1. A chair comprising a base, at least a fixed stem extending vertically from the base, a track platform mounted at the top of the stem, a carriage mounted on the track platform for sliding movement in a convex arc relative to the carriage, one of the carriage and track platform mounting a track including at least a pair of bearing races provided in the forward and rearward directions, and the other of the carriage and track platform including bearings adapted to roll in the bearing races in the track, a seat pan mounted on the carriage for movement about fixed pivot in an axis at right angles to the direction of the bearing races, and resilient means associated with the seat pan to resist the pivoting movement of the seat pan.
- 5. A chair comprising a base, at least a fixed stem extending vertically from the base, a track platform mounted on the stem, and a carriage mounted to the track platform for sliding movement in a concave arc relative to the carriage, a first track mounted on one of the track platform and carriage, and a track follower mounted on the other of the track platform and carriage so that the carriage moves at least in the front and rearward direction in a first concave arc, a seat pan mounted for sliding movement on the carriage, a second concave track mounted on the one of the seat pan and carriage, and a track follower means mounted on the other of the seat pan and carriage so that the movement of the seat pan follows the second concave track having an arc of smaller radius than the arc of the first concave track.
Specification