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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0371264 (1989-06-26) |
발명자 / 주소 |
|
출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 24 인용 특허 : 0 |
A roll-up door for enclosing a doorway in a building. The door comprises a horizontal rotatable drum mounted above the doorway and a flexible door panel is wound on the drum. A pair of first pulleys are secured to opposite ends of the drum and one end of a flat belt is secured to each first pulley,
A roll-up door construction for enclosing a doorway in a building, comprising rotatable drum means mounted on the building above said doorway, a flexible door panel disposed to be wound on said drum means, drive means for rotating said drum means to thereby move said door panel between a rolled-up o
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