Chair
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 2, 1988
Grant Date -
N/A
app pub date -
May 20, 1987
filing date -
May 26, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A chair with a seat support (7) has a seat plate (11) which is supported to the seat support (7) by means of a rear and a front guide rod. The chair has a back rest support (14a) that is pivot-hinged to the seat support (7). The seat support (7) is connected to a rigid, back rest angle support (1) by means of a front and a back parallelogram guide rod (3). The angle support is fixed to the bottom part of the chair (2). The parallelogram guide joints (3) are also connected to each other by means of a parallel guide rod (4). A first force storage member (5) is situated between the seat support (7) and the back rest angle support (1) and a second force storage member (15) is located between the back rest support (14a) and the seat support (7). The force necessary for the slope of the back rest is independent of the weight of the user. A user with higher weight must expend a higher amount of force for the slope of the back rest to move backward than a user with a lower weight.
First Claim
Family
International Classification(s)
Cited Art Landscape
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