Grapple snubber

Details Grapple snubber Grapple snubber

1986-05-07

1987-07-14

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Swing dampener

188381, B66C 100, F16F 900

Patent

active

046798390

ABSTRACT:
A log skidder has a lifting arm which may be raised or lowered by hydraulic pressure. A grapple is carried at the end of the lifting arm for lifting one end of a log to drag it from one area to another. The suspension for the grapple from the arm includes a body pivotally connected to the arm by a first horizontal pivot rod, and the grapple is pivotally connected to the body by a second horizontal pivot rod perpendicular to the first pivot rod. A pair of snubbers respectively encircle the pivot rod. Each snubber includes a ring-shaped hydraulic cylinder having a ring-shaped piston therein. Hydraulic fluid introduced into the cylinder extends the respective pistons to effect snubbing between the body and the arm in between the grapple and the body.

REFERENCES:
patent: 2742107 (1956-04-01), DuBois
patent: 3185256 (1965-05-01), Schilling
patent: 3301587 (1967-01-01), Heikkinen
patent: 3425518 (1969-02-01), Morrow
patent: 3592503 (1971-07-01), Lundberg
patent: 4335914 (1982-06-01), Korbel
patent: 4553778 (1985-11-01), Tyer
patent: 4572567 (1986-02-01), Johnson
patent: 4573728 (1986-03-01), Johnson

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