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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0553650 (1975-02-27) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 20 인용 특허 : 0 |
A kettle-shaped drum has an annular recess adjacently below the top end of its hollow body. The flexible drum head includes a peripheral rib disposed in the recess and engaged at the top by a bracket. A plurality of recessed tensioning screws that extend downwardly from the bracket are threaded into
A framework for supporting a drum above a floor, said framework comprising: a base engaging said floor; at least one elongate frame member supported by said base and disposed upwardly of said floor; a first joint member received on said frame member for selective pivotal and longitudinal movement wi
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