US Patent 7448684 Backrest adjustment device
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Patent abstract
A backrest adjustment device includes a bottom board, a support board movable relative to the bottom board, and two opposite linkages pivotally mounted between the support board and the bottom board to drive the support board to move relative to the bottom board to change the distance between the support board and the bottom board. Thus, the two linkages are pivoted to drive the support board to move relative to the bottom board to change the distance between the support board and the bottom board so as to adjust the position of the backrest relative to the seat.
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Patent Citations Received
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US Patent 07448684 Backrest adjustment device US Patent 7448684 Backrest adjustment device
Infobox
Patent Number
0744868400
Patent Number
744868400
Edits on 27 Apr, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074486840
Date of Patent
November 11, 2008
0Patent Application Number
111686870
Date Filed
June 28, 2005
0Official Website
Patent Primary Examiner
Edits on 26 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074486840
Date of Patent
November 11, 2008
0Patent Application Number
111686870
Date Filed
June 28, 2005
0Official Website
Patent Primary Examiner
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US Patent 07448684 Backrest adjustment device
Infobox
Is a
Patent jurisdiction
Patent number
07448684
Date of patent
November 11, 2008
Patent application number
11168687
Date Filed
June 28, 2005
Patent primary examiner
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