Earth working – Automatic power control – Land leveller type
Reexamination Certificate
2005-08-05
2010-12-28
Pezzuto, Robert E (Department: 3671)
Earth working
Automatic power control
Land leveller type
C701S050000
Reexamination Certificate
active
07857071
ABSTRACT:
A graphical grade indicator for use in earth moving operations has an improved, variable resolution and a substantially unlimited range. This grade indicator results in a more accurate indication of the position of a cutting blade relative to the desired grade and, as a result, allows a machine operator to more accurately control grading operations. In one embodiment, a graphical grade indicator has a graphical scale with a substantially unlimited range and various indications indicating a desired grade level and at least a first undesirable grade level. When the cutting blade deviates from the desired grade level, a first indication is provided indicating, illustratively, the direction and magnitude of movement of the cutting blade repositioning necessary to achieve the desired grade. The resolution of the graphical scale can be changed in order to provide a desired degree of accuracy in grading operations.
REFERENCES:
patent: 4807131 (1989-02-01), Clegg
patent: 5375663 (1994-12-01), Teach
patent: 5404661 (1995-04-01), Sahm et al.
patent: 5631658 (1997-05-01), Gudat et al.
patent: 5860480 (1999-01-01), Jayaraman et al.
patent: 5905968 (1999-05-01), Staub et al.
patent: 5961573 (1999-10-01), Hale et al.
patent: 6112145 (2000-08-01), Zachman
patent: 6133826 (2000-10-01), Sparling
patent: 6166802 (2000-12-01), Kodaira et al.
patent: 6191732 (2001-02-01), Carlson et al.
patent: 6655465 (2003-12-01), Carlson et al.
patent: 6736216 (2004-05-01), Savard et al.
patent: 6816761 (2004-11-01), Denton
patent: 6879910 (2005-04-01), Shike et al.
patent: 2003/0137658 (2003-07-01), Ohtomo et al.
Jackson Richard John
McCain Steven Daniel
Mitchell Joel F.
Pezzuto Robert E
Topcon Positioning Systems, Inc.
Wolff & Samson PC
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