Fire escape – ladder – or scaffold – Single stile – strand or pole – Flexible
Reexamination Certificate
2005-11-08
2005-11-08
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Single stile, strand or pole
Flexible
C182S190000
Reexamination Certificate
active
06962238
ABSTRACT:
A descent controller for lowering a workman or other person along a vertically extending rope from an elevated position to a relatively lower position includes a friction device that may be in the form of a cylinder having a plurality of turns of rope wrapped therearound or a plurality of spaced apart horizontal bars with the rope woven between the bars. The friction device interacts with said rope to retard the movement of the controller along the rope. A lever operated pawl is mounted beneath the friction device and is used by the workman to applying an adjustable force on said rope in order to control his descent down the rope. A centrifugal brake is mounted below the lever centrifugal brake. The centrifugal brake includes a wheel mounted for rotation and has the rope passing around at least a portion of said wheel. Included within the brake is a pawl brake mounted for rotation with the wheel and a fixed stop member. Upon sensing rapid rotation of the wheel, the pawl brake moves outwardly by centrifugal force to engage the fixed stop member and applies a positive stopping force on the wheel to prevent movement of the descent controller relative to said rope thereby preventing accidental freefall.
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Lehrer Norman E.
Thompson II Hugh B.
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