Hoisting device

Implements or apparatus for applying pushing or pulling force – Device or member for contacting and guiding moving cable – Including rotatable – cable contacting – pulley wheel element

Patent

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Details

114218, 188 651, B66D 304

Patent

active

043323723

ABSTRACT:
A hoisting device, in particular a block, comprises a case having a shorter side and a longer side. A rotatable sheave is rotatably mounted in the case on a shaft that extends between the two sides and projects beyond the shorter side. Two fixed sheaves are mounted on the projecting portion of the shaft. A brake shoe slidably mounted on the longer side of the case below the rotatable sheave is slidable between an upper portion in engagement with the sheave and a lower position disengaged from the sheave. In hoisting condition, a rope passes over the rotatable sheave. In lowering condition, the rope passes from the rotatable sheave, down under the brake shoe and then over the inner non-rotating sheave, thereby pulling the brake block up against the rotatable sheave. In locked position, the rope further passes from the inner non-rotatable sheave around the outer non-rotatable sheave.

REFERENCES:
patent: 666879 (1901-01-01), White
patent: 2343086 (1944-02-01), Schultz
patent: 4266498 (1981-05-01), Clark

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