CHAIR
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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N/A
Issued Date -
Sep 30, 2010
app pub date -
Aug 5, 2008
filing date -
Jan 16, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A chair includes a seat 5 for sinking backward as a backrest 7 mainly made up of an elastically deformable back shell 71 tilts back, wherein a back support post 6 which is pivoted at its lower end portion on a support base portion 3 disposed below the seat 5 and which supports the back shell 71 includes an upper back frame 61 for supporting a portion of the back shell 71 above a lumbar support portion 71L of the back shell 71 capable of supporting a lumbar part of a seated person and a lower back frame 62 for supporting a portion near a lower end portion of the back shell 71, the back frames (the upper back frame 61 and the lower back frame 62) are pivoted on each other and the pivot point (third support shaft X3) is set behind the lower end portion of the back shell 71, and the whole back shell 71 is curved and deformed to protrude the lumbar support portion 71L relatively forward as the upper back frame 61 tilts back about the pivot point (third support shaft X3) with respect to the lower back frame 62.
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Cited Art Landscape
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