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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0285964 (2008-10-17) |
등록번호 | US7861370 (2010-12-20) |
우선권정보 | TW-2007-6141886 A(2007-11-06) |
발명자 / 주소 |
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대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 14 인용 특허 : 7 |
A caster includes a casing having a shank and a locking unit is located at a lower end of the shank. Two wheels are connected to two sides of the casing by a shaft and an inner gear is connected to each of the two wheels. A direction unit is located in the casing and includes a first lever and an op
What is claimed is: 1. A caster (A) comprising:a casing (1) having a shank (11) which is radially connected to the casing (1) and a locking unit (12) is located at a lower end of the shank (11);two wheels (2) connected to two sides of the casing (1) and a shaft (21) extending through the two wheels
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