Grease loaded grapple dampener

Details Grease loaded grapple dampener Grease loaded grapple dampener

1990-10-03

1992-05-05

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Swing dampener

188 83, 188367, B66C 100, B66C 1306, F16F 1100

Patent

active

051101696

ABSTRACT:
A grease loaded dampener for the swivel link of a grapple skidder is mounted to the pivot pin of the swivel link. The dampener is provided with two sets of friction plates. The friction plates are compressed by an annular piston that is slidably mounted to a bushing that is secured to the pivot pin. A grease zerk supplies grease to the cylinder formed between the bushing and the annular piston. A pressure relief valve is in fluid communication with the cylinder and prevents the cylinder from becoming over pressurized unduly compressing the friction plates.

REFERENCES:
patent: 3301587 (1965-03-01), Heikkinen
patent: 4417759 (1983-11-01), Pierrot, III et al.
patent: 4572567 (1986-02-01), Johnson
patent: 4573728 (1986-03-01), Johnson
patent: 4679839 (1987-07-01), Damron
patent: 4715641 (1987-12-01), Palmer
patent: 4717191 (1988-01-01), Farmer
patent: 4723639 (1988-02-01), Hungerford
patent: 4810020 (1989-03-01), Powell

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