Anti-rotation counterhoop-fixing structure for drum

Music – Instruments – Drums

Reexamination Certificate

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Details

C084S41100A

Reexamination Certificate

active

07960633

ABSTRACT:
An anti-rotation counterhoop-fixing structure is provided for a drum, which realizes secured and reliable fastening of the counterhoop, wherein a fastening end face of a drum-fastening screw and a fastening face of the counterhoop are respectively provided with roughened anti-skidding patterned surfaces so that when the screw is tightened for fastening, the anti-patterns provided on the mated fastening faces effectively prevent the threaded engagement from getting loosened when the drum is beaten or batted. Thus, secured and reliable adjustment and fastening of the drum skin can be realized, which maintains perfect and intact sound of drum beating and facilitates convenience and practicability of operation and use of music instrument percussion.

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patent: 7402740 (2008-07-01), van der Meulen
patent: 7692084 (2010-04-01), Lai
patent: 7754953 (2010-07-01), Takegawa
patent: 7855331 (2010-12-01), Chen
patent: 2007/0131087 (2007-06-01), Chen

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