Portable winch apparatus

Details Portable winch apparatus Portable winch apparatus

1977-07-21

1980-12-02

Scherbel, David A.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

248206R, 248362, 269 21, B66D 326

Patent

active

042366933

ABSTRACT:
This improvement in the field of portable winches or towing devices comprises a shell of heavy construction, which is easily movable on integrally mounted retractable wheels, and which when in its desired location and directional orientation can by its own vacuum pump, mounted thereon, create a vacuum within itself, developing thereby an immobilizing force equivalent to several thousand pounds of weight, enabling the winch mounted thereon to exert a pulling force of magnitude comparable to the immobilizing force, making possible the movement and relocation of heavy objects.

REFERENCES:
patent: 961093 (1910-06-01), Astor
patent: 1117548 (1914-11-01), Bouchery
patent: 2009721 (1935-07-01), Williams
patent: 2101399 (1937-12-01), Larsen
patent: 2123549 (1938-07-01), Williams
patent: 2815240 (1957-12-01), Lytle
patent: 2945242 (1960-07-01), Heiden
patent: 3159370 (1964-12-01), Rubinstein
patent: 3758078 (1973-09-01), Grenn

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