Fire escape – ladder – or scaffold – With storage device for supple escape – Reel
Reexamination Certificate
2006-10-10
2006-10-10
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
With storage device for supple escape
Reel
C182S043000
Reexamination Certificate
active
07117975
ABSTRACT:
An elevated location descent apparatus comprising a descending device, a braking device and a power transmitting device; the descending device comprising sprockets positioned in a vertical plane, a suspension chain positioned around the sprockets and a payload-suspending means attached to the suspension chain, the braking device comprising a fluid pump converting the rotational movement of a crankshaft into the reciprocal movement of pistons, which reciprocal movement causes the fluid pump to receive a fluid from an inlet and discharge the fluid through an outlet, a fluid circulating conduit connecting the outlet of the fluid pump with the inlet of the fluid pump wherein the fluid discharged from the fluid pump circulates, a flow-restricting valve adjusting the amount of the fluid passing through the outlet of the fluid pump to generate the fluid resistance, and a rotational governor controlling the flow-restricting valve based on the rotational speed of the sprocket; the power transmitting device comprising a transmission means that transmits the rotational force of the sprocket of the descending device to the crankshaft of the braking device; and the elevated location descent apparatus being designed to apply braking force to the rotation of the sprocket of the descending device by controlling the flow-restricting valve through the use of the rotational governor to vary the fluid resistance applied to the compression movement of the pistons in accordance with the speed of the sprocket generated by the weight of a payload when the payload is attached to the suspension chain.
REFERENCES:
patent: 204581 (1878-06-01), Knight et al.
patent: 537383 (1895-04-01), Buckelew
patent: 780795 (1905-01-01), Hansen et al.
patent: 879439 (1908-02-01), Campbell
patent: 931040 (1909-08-01), Cooke
patent: 3095946 (1963-07-01), Fisher
patent: 4512438 (1985-04-01), Vilchek et al.
patent: 4570750 (1986-02-01), Tsai
patent: 4653609 (1987-03-01), Devine
patent: 2268539 (1975-11-01), None
patent: 50-117297 (1975-09-01), None
patent: 59-741 (1984-01-01), None
Chin-Shue Alvin
Knobbe Martens Olson & Bear LLP
LandOfFree
Elevated location descent apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Elevated location descent apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Elevated location descent apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3692425