Personnel chain climber

Details Personnel chain climber Personnel chain climber

1980-04-21

1981-07-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Pole or strand grasping-type climber

Foot- or leg-attachable

182191, 182221, A63B 2700

Patent

active

042769582

ABSTRACT:
Apparatus for use as a chain climbing device or a chain racheting device ludes a pair of spring-closed opposing cams disposed in a rigid structure which supports a pair of cam pins, each of which extends through an elongated aperture in one of the cams. The weight of a person using the chain climbing device is transferred from a pair of cam stops attached to the rigid structure to the cams to the chain. When the device is used for chain racheting the weight of the chain is transferred to the cams to the cam stops to the rigid structure. The shape of the cams and the elongated apertures enable the cams to rotate about and slide upward or downward on the cam pins to selectively allow upward or downward relative motion between the chain and the apparatus or lock the chain and the apparatus in a fixed relationship.

REFERENCES:
patent: 580794 (1897-04-01), Money
patent: 952720 (1910-03-01), Allen
patent: 1168321 (1916-01-01), Maley
patent: 1307468 (1919-06-01), Wells
patent: 1751131 (1930-03-01), Costello
patent: 1964995 (1934-07-01), McLaughlin
patent: 1982482 (1934-11-01), Rhodes
patent: 2057013 (1936-10-01), Curtis
patent: 3075611 (1963-01-01), Baringer
patent: 3938620 (1976-02-01), Nothiger
patent: 3968858 (1976-07-01), Vollan

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