Grapple skidder with self-centering grapple support mechanism

Details Grapple skidder with self-centering grapple support mechanism Grapple skidder with self-centering grapple support mechanism

1975-06-13

1976-11-09

Tollberg, Stanley H.

Spring devices

Centering device

F16F 1506

Patent

active

039906884

ABSTRACT:
A material handling vehicle, especially a log skidder, having articulated front and rear sections and a boom mounted on the rear section which pivotally supports a material handling member such as a grapple adapted to seize the ends of logs to be moved by the skidder. The grapple hangs from the end of the boom on a self-centering mechanism which includes a plurality of first circular discs, a plurality of second circular discs interleaved therewith with the uppermost disc being fixed and interacting between discs, a plurality of spring elements which resist rotation of the grapple in either direction about the grapple turning axis tending to return it to a normally centered position relative to the centerline of the vehicle without operator assistance.

REFERENCES:
patent: 3708191 (1973-01-01), Hegedus
patent: 3933012 (1976-01-01), Ketchum

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