Grapple pivot joint with swing dampener

Details Grapple pivot joint with swing dampener Grapple pivot joint with swing dampener

1980-08-25

1982-06-22

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Well type

188 83, B66C 100, F16F 704

Patent

active

043359140

ABSTRACT:
A suspension for a grapple includes a swivel link coupled between a support boom and a head of the grapple for permitting the latter to undergo swinging movement about first and second pivot axes arranged crosswise to each other. At each pivot axis, there is a pivot pin having a brake associated therewith and including a brake housing enclosing an outer end portion of the pin and containing brake disks and a Belleville spring for maintaining the disks frictionally engaged with each other.

REFERENCES:
patent: 1828425 (1931-10-01), Matthews
patent: 3219162 (1965-11-01), Hainer et al.
patent: 3301587 (1967-01-01), Heikkinen
patent: 3889829 (1975-06-01), Dutton
patent: 3937302 (1976-02-01), Palmcrantz
patent: 4099761 (1978-07-01), Cullings
ESCO Corporation advertising brochure, "Model 26 Grapple," Jun. 9, 1975.
ESCO Corporation Catalog 275, Supplement 1, "Model 26 Fixed Boom Skidding Grapple," May 1978.

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