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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||182/238 ; 182/71|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 8|
A device for safely lowering persons from upright structures such as buildings during an emergency at a safe, predetermined speed of no more than about four feet per second irrespective of the weight of the person being lowered. The device has a drum about which a cable is wound, a gear pump driven by the drum via a reduction gear train, and a hydraulic circuit which includes the gear pump and a flow control valve which maintains a constant hydraulic fluid flow through the circuit irrespective of the weight of the person being lowered and, therefore, als...
Apparatus for lowering persons during an emergency along an upright exterior of a structure to the ground surrounding the structure at a safe, predetermined speed, the apparatus comprising: a drum adapted to be attached to the structure and a cable wound about the drum and of sufficient length so that a free end of the cable can reach the ground, the drum being rotatable in a first direction for paying out the cable and lowering the free end thereof to the ground; a hydraulic circuit including a gear pump operatively coupled to the drum so that rotation ...