Self-adjusting transformer sling

Details Self-adjusting transformer sling Self-adjusting transformer sling

1992-05-27

1993-05-04

Olszewski, Robert P.

Handling: hand and hoist-line implements

Hoistline attached load supporting frame

Load capturing supports

294 8121, 294 8151, B66C 162

Patent

active

052074684

ABSTRACT:
The sling includes a telescopic compensation bar, provided with two pairs of lever arms pivotally mounted to the opposite ends respectively of the compensation bar. The lever arms pivotally engage at their bottom ends the integral sling hooks of the transformer to be lifted. Each of the two parallel plates of the telescopic bar has an intermediate ovoidal slit, both slits slidingly engaged by a transverse shaft. The shaft depends from a yoke suspended to the hoist gear cable. The two ovoidal slits are not parallel, but rather disposed in X-shaped fashion. Hence, during lift, for a smaller transformer width, the compensation bar will automatically retract to a shorter overall length, so as to automatically and continuously maintain the lateral lever arms tightly and firmly against the transformer, whatever the dimensions of the transformer. Moreover, the greater the transformer weight, the larger the inward bias will be applied by the lever arms against the transformer.

REFERENCES:
patent: 1510176 (1924-09-01), Knight
patent: 3010751 (1961-11-01), Day et al.
patent: 3273931 (1966-09-01), Caldwell et al.
patent: 3549190 (1970-12-01), Caldwell
patent: 4108485 (1978-08-01), Jennings
patent: 4258949 (1981-03-01), Keagbine
patent: 4373755 (1983-02-01), Herberholz et al.
patent: 4563031 (1986-01-01), Kishimoto et al.
patent: 4693017 (1987-09-01), Oehler et al.

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