Lifting hook

Details Lifting hook Lifting hook

1987-09-09

1988-08-23

Marbert, James B.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Load releasing means

294 822, B66C 136, F16B 4502

Patent

active

047656670

ABSTRACT:
A lifting hook for automatic releases of a load held by a lifting hook comprises a hook member (1) with a hooking portion (2) and a suspension portion (3) as well as an intermediate portion (4) between said portions, a suspension means (5) which at least when the hooking portion (2) is loaded is pivoted in the suspension portion (3) and suspended by a traction element, e.g. a chain or the like. The intermediate portion (4) comprises a slot along substantially its whole length, which slot receives the bearing (8) of the suspension means (5), so that this bearing is displaceable in said slot (7). The hook member (1) is arranged to, when the traction element is unloaded followed by a lifting of the hook member (1), be turned from an ordinary load-carrying position to a load-releasing position, preferably 180.degree., by displacement of the center of gravity of the lifting hook.

REFERENCES:
patent: 2705357 (1955-04-01), Davick
patent: 4026594 (1977-05-01), Kumpulainen

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