Back rest for a chair
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United States of America Patent
Stats
-
Feb 17, 2009
Grant Date -
Apr 24, 2008
app pub date -
Oct 18, 2007
filing date -
Oct 18, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A back rest for a chair with a back support and a back surface secured to the back support and able to swivel about a two-axis joint. The joint has a joint plate connected to the back surface, an element made of an elastic material that supports the joint in a ground position, and a chamber to accommodate the elastic element, connected to the back support. The joint plate is arranged in the receiving chamber between two elements made from an elastic material, holding the joint in a ground position and each being supported against the receiving chamber, and it can swivel about the two swivel axes. When the joint is placed under load, the two elastic elements are only subjected to compression. There are no tension-loaded connections which break under loading and can result in the joint falling apart.
First Claim
Family
International Classification(s)
Cited Art Landscape
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