Excavating – Combined or convertible – Combined with clamp – grapple – or shear
Reexamination Certificate
2007-07-10
2007-07-10
Beach, Thomas A (Department: 3671)
Excavating
Combined or convertible
Combined with clamp, grapple, or shear
C037S403000, C037S903000, C414S724000
Reexamination Certificate
active
11058091
ABSTRACT:
An excavator thumb assembly for use with an excavator having a boom, a hydraulic cylinder, a hydraulic cylinder shaft that extends and retracts from the hydraulic cylinder, and a bucket pivotally attached to an end of the boom and operatively attached to the hydraulic cylinder shaft. The excavator thumb assembly includes a thumb pivot plate attached to an intermediate portion of the boom. The thumb pivot plate has a thumb attachment point positioned above the longitudinal axis of the boom. The excavator thumb assembly also includes a thumb pivotally attached to the thumb attachment point along a thumb pivot axis, and operatively attached to the hydraulic cylinder shaft. The excavator thumb assembly is configured so that the thumb and bucket opposably grab and release objects as the hydraulic cylinder shaft extends and retracts, respectively.
REFERENCES:
patent: 3674162 (1972-07-01), Smith
patent: 3828950 (1974-08-01), Schwantes
patent: 4283866 (1981-08-01), Ogawa
patent: 4375345 (1983-03-01), Hanson
patent: 4466494 (1984-08-01), Hanson
patent: 4519739 (1985-05-01), Risch
patent: 4635386 (1987-01-01), Kobayasi
patent: 4770597 (1988-09-01), Powers
patent: 4803788 (1989-02-01), Sorenson
patent: 4804309 (1989-02-01), Risch
patent: 4845867 (1989-07-01), Albrecht
patent: 4932832 (1990-06-01), McCasland et al.
patent: 5111602 (1992-05-01), Risch
patent: 5553408 (1996-09-01), Townsend
patent: 5678332 (1997-10-01), Hawkins
patent: 5813822 (1998-09-01), Pisco
patent: 5927933 (1999-07-01), Tucker
patent: 5972933 (1999-10-01), Pfirrmann
patent: 6203267 (2001-03-01), Heiple et al.
patent: 6209237 (2001-04-01), Heiple et al.
patent: 6260294 (2001-07-01), Pitcher
patent: 6385870 (2002-05-01), Webel et al.
patent: 6453586 (2002-09-01), Wolin et al.
patent: 6640471 (2003-11-01), Desrochers
patent: 6742291 (2004-06-01), Frigon et al.
patent: 6843005 (2005-01-01), Clapper
patent: 7037064 (2006-05-01), Heiple
patent: 4-202917 (1992-07-01), None
patent: WO89/12145 (1989-12-01), None
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