Progressive linkage for excavator thumb

Details Progressive linkage for excavator thumb Progressive linkage for excavator thumb

2008-08-15

2010-10-26

Beach, Thomas A (Department: 3671)

Excavating

Combined or convertible

Combined with clamp, grapple, or shear

C037S410000, C037S903000, C414S739000

Reexamination Certificate

active

07818901

ABSTRACT:
An improved dipper stick, tool, and thumb combination includes a progressive linkage for connecting the thumb to a thumb actuator wherein the pivot axis of the thumb idler link connection is spaced from the pivot axis of the tool idler link connection. The pivot axis of the thumb idler link connection may be offset outwardly from the inner surface of the dipper stick. A mounting plate may be connected to the inner surface of the dipper stick to locate the pivot axis in the offset position.

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