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EXCAVATOR THUMB ASSEMBLY

  • US 20120163950A1
  • Filed: 11/17/2011
  • Published: 06/28/2012
  • Est. Priority Date: 12/22/2010
  • Status: Active Grant
First Claim
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1. A thumb assembly mountable to a stick of an excavator, the thumb assembly comprising:

  • a base member having at least one joint location,a thumb member pivotally connected to the base member,a first linkage member having first and second ends and being pivotally connected at the first end to the thumb member,a second linkage member having first and second ends and being pivotally connectable at the first end to the joint location,wherein the first and second linkage members are connected by a knee joint at their second ends such that they are foldable relative to each other between a working position in which the thumb member extends away from the base member and a storage position in which the thumb member extends close to the base member,wherein the knee joint permits both relative rotation and relative sliding of the first and second linkage members.

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