Armrest for chair

Chairs and seats – Armrest – Adjustable to multiple use positions relative to bottom or back

Reexamination Certificate

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Reexamination Certificate

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07980632

ABSTRACT:
An armrest for a chair includes a lower bushing, an upper bushing, and a resilient ring shaped part received in the lower bushing. An engaging portion is formed on an end of the lower bushing, and a side surface of the lower bushing defines a toothed rack hole, a plurality of teeth are formed at two opposite sides of the toothed rack hole. The upper bushing nests the lower bushing therein and defines a through hole corresponding to the toothed rack hole. A supporting is formed on an end of the upper bushing differing from the end of the upper bushing adjacent to the engaging portion. A button opposite to the through hole in the upper bushing is formed on the resilient ring shaped part and protrudes to an outer of the upper bushing from the toothed rack hole and the through hole. An H shaped latching portion is formed on the button and engages with the teeth of the lower bushing.

REFERENCES:
patent: 6837545 (2005-01-01), Ho
patent: 2008/0036265 (2008-02-01), Pan
patent: 2008/0191537 (2008-08-01), Oda
patent: 2008/0309140 (2008-12-01), Ho
patent: 2009/0096271 (2009-04-01), Tsai
patent: 269800 (2005-07-01), None
patent: 333118 (2008-06-01), None

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