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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0799403 (1977-05-23) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 7 인용 특허 : 2 |
A stopcock with the exception of its shaft, journal and bearings, is constructed of a plurality of sheet metal parts welded together to form a housing and a plug rotatably mounted in the housing. The housing is made up of a tubular member with ring disks welded to its opposite ends. The plug is made
Stopcock comprising a welded housing and a ball-shaped plug, said plug including two ball-shaped half shells each pressed from a sheet metal blank, wherein the improvement comprises that said housing includes a sheet metal blank formed into a unitary tubular shell having a pair of opposite open ends
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