Excavating – Ditcher – Condition responsive
Reexamination Certificate
2005-10-04
2005-10-04
Will, Thomas B. (Department: 3671)
Excavating
Ditcher
Condition responsive
C037S348000, C037S414000, C037S382000, C701S050000, C091S361000
Reexamination Certificate
active
06951067
ABSTRACT:
An apparatus for controllably positioning a work implement of an earth moving machine is disclosed. The work implement includes a boom and an attachment being attached thereto where the boom is actuated by a hydraulic lift cylinder and the attachment is actuated by a hydraulic tilt cylinder. Implement position sensors sense the elevational position of the boom and the pivotal position of the attachment and responsively produce respective implement position signals. A controller that receives the implement position signals, compares the relative position of the boom and the attachment with a pre-determined boundary condition, and produces an electrical valve signal. A valve assembly receives the electrical valve signal and controllably provides hydraulic fluid flow to the respective hydraulic cylinders in response to a magnitude of the electrical valve signal.
REFERENCES:
patent: 4625622 (1986-12-01), Gunda et al.
patent: 4844685 (1989-07-01), Sagaser
patent: 5062264 (1991-11-01), Frenette et al.
patent: 5182908 (1993-02-01), Devoer et al.
patent: 5189940 (1993-03-01), Hosseini et al.
patent: 5333533 (1994-08-01), Hosseini
patent: 5511458 (1996-04-01), Kamata et al.
patent: 5537818 (1996-07-01), Hosseini et al.
patent: 5617723 (1997-04-01), Hosseini et al.
patent: 5701793 (1997-12-01), Gardner et al.
patent: 5875701 (1999-03-01), Cobo et al.
patent: 5899008 (1999-05-01), Cobo et al.
patent: 6032093 (2000-02-01), Denbraber et al.
patent: 6047228 (2000-04-01), Stone et al.
patent: 6185493 (2001-02-01), Skinner et al.
patent: 6233511 (2001-05-01), Berger et al.
patent: 6253136 (2001-06-01), Stratton et al.
patent: 6257118 (2001-07-01), Wilbur et al.
patent: 6385519 (2002-05-01), Rocke
patent: 6459976 (2002-10-01), Chen et al.
patent: 6498973 (2002-12-01), Dix et al.
patent: 6785596 (2004-08-01), Rossow et al.
Dietz Hans P.
Skinner Thomas G.
Beach Thomas A
Caterpillar Inc.
Will Thomas B.
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