Method and apparatus for assisting multiple climbers

Fire escape – ladder – or scaffold – Torso harness – Ladder-associated

Reexamination Certificate

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C182S003000, C182S005000, C182S133000, C182S147000

Reexamination Certificate

active

10867323

ABSTRACT:
A method is provided for assisting multiple climbers in ascending and descending the same ladder using an apparatus that includes a plurality of counterweights and a rigging system coupled to the counterweights, the rigging system includes at least two subsystems, each subsystem includes at least one cable, at least one pulley, and at least one harness. The method includes configuring a first subsystem to assist a first climber in ascending and descending the ladder, configuring a second subsystem to assist a second climber in ascending and descending the ladder, coupling a first harness to the first climber, coupling a second harness to the second climber, using the first subsystem to assist the first climber in ascending and descending the ladder, and using the second subsystem to assist the second climber in ascending and descending the ladder.

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patent: 4997064 (1991-03-01), Motte et al.
patent: 5161639 (1992-11-01), Ice
patent: 6390952 (2002-05-01), Wilson

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