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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0430962 (1982-09-30) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 12 인용 특허 : 6 |
A fire escape device enabling a person to escape from a multi-story building. The fire escape device of the invention comprises two sets of planetary gears which operatively interconnect a winding drum to the main shaft of a fan assembly. During operation, as the cable is unwound from the drum, the
A fire escape device, comprising in combination: a drum; a length of cable wound on said drum; a fan assembly; and a first and a second set of planetary gears operatively connected between said drum and said fan assembly to cause the blades of said fan assembly to rotate at great speed upon rotation
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