Log grapple

Details Log grapple Log grapple

1976-01-05

1977-05-17

Marbert, James B.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

294106, 214147G, B66C 316

Patent

active

040238482

ABSTRACT:
An improved log grapple having a pair of grapple arms each supported on a head by a drive link or lever and a driven link. The levers are pivotally supported between their ends on a common central pivot on said head and the driven links are each pivotally supported on said head outboard of the common lever pivot. Each link and lever then cross to define an X-linkage with the lower ends pivotally connected to the upper end of one grapple arm, with the driven link connections inboard of the lever connections. A drive means then rotates the upper free ends of the levers to relatively close the grapple arms, then lifting the arm ends to securely embrace logs received therebetween.

REFERENCES:
patent: 3421791 (1969-01-01), Lindquist
patent: 3627372 (1971-12-01), Carpenter et al.
patent: 3933389 (1976-01-01), Korbel

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