Self-aligning grapple swivel

Details Self-aligning grapple swivel Self-aligning grapple swivel

1975-10-22

1976-08-24

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

294112, 254190R, 212 84, 212127, 212129, B66C 128

Patent

active

039763226

ABSTRACT:
This disclosure relates to a novel self-aligning swivel apparatus which is adapted for attaching a grapple to a manipulating means such as a log loader boom or yarding carriage. The swivel comprises upper and lower portions interconnected by pivot means to provide rotatable freedom therebetween. The upper portion is interconnected to the grapple manipulating means and the grapple is operatively connected to the lower portion in radial spaced relation from the axis of the pivot means. The pivot axis of the swivel is inclined toward the self-aligned position of the grapple with respect to the manipulating means. This position is defined as that which attains when the pivotal axis intersects a substantially vertical axis passing through the center of gravity of the grapple.

REFERENCES:
patent: 3032322 (1962-05-01), Lawrence
patent: 3082031 (1963-03-01), Hindberg
patent: 3860282 (1975-01-01), Johnson

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