Fire escape – ladder – or scaffold – With storage device for supple escape – Reel
Patent
1994-09-30
1996-12-24
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
With storage device for supple escape
Reel
182 71, A62B 102
Patent
active
055866174
ABSTRACT:
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, also irrespective of the fluid pressure generated by the pump during operation. The hydraulic circuit is in fluid communication with a hydraulic fluid tank having an exterior surface dimensioned to cool the hydraulic fluid and prevent its temperature from rising by more than about 200.degree. F. above the ambient temperature during operation of the device. A handle can be used for manually rewinding the cable about the drum, and the hydraulic circuit includes a one-way branch line, controlled with a check valve, to permit countercurrent circulation of hydraulic fluid during the rewinding of the cable. The gear train causes the gear pump to rotate at a substantially higher rate of rotation than that of the drum to facilitate the control of the fluid flow in the hydraulic circuit. The increase in fluid volume results in improved flow control in the flow control valve.
REFERENCES:
patent: 1200198 (1916-10-01), Jersild
patent: 3834671 (1974-09-01), Du Mesnil
patent: 3861496 (1975-01-01), Hoover
patent: 4088201 (1978-05-01), MacFarlane
patent: 4385679 (1983-05-01), Mulcahy
patent: 4437546 (1984-03-01), Marinoff
patent: 4520900 (1985-06-01), Orgeron
patent: 4550801 (1985-11-01), Forrest
patent: 4616735 (1986-10-01), Orgeron
patent: 4653609 (1987-03-01), Devine
patent: 4671384 (1987-06-01), Sing
Albert Donn E.
England Robert L.
Chin-Shue Alvin C.
England Robert L.
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