Patent ID: 8827626
Filing Date: 2014-09-09
Classification: E02F

Abstract:
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 including first and second ends and being pivotally connected at the first end to the thumb member, the second end of the first linkage member including a first locking aperture, a removable locking member configured to be selectively disposed inside the first and second locking apertures, a second linkage member including first and second ends and being pivotally connectable at the first end to the joint location, the second end of the second linkage member including a second locking aperture, a removable locking member configured to be selectively disposed inside the first and second locking apertures, 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 is configured to permit, when the locking member is removed from the first and second locking apertures, both relative rotation and relative sliding of the first and second linkage members.