Bulldozer autograding system

Details Bulldozer autograding system Bulldozer autograding system

2006-10-17

2006-10-17

Will, Thomas B. (Department: 3671)

Earth working

Automatic power control

Land leveller type

C172S007000, C172S824000, C172S826000, C037S414000

Reexamination Certificate

active

07121355

ABSTRACT:
A dozer blade control system controls the position of a bulldozer blade, maintaining the blade at a constant position as the dozer travels through a worksite. The control system monitors the angle of the dozer blade with respect to the earth and when it senses that the dozer blade is tilting, it corrects the dozer blade's position by extending or retracting hydraulic cylinders that couple the dozer blade to the chassis of the crawler-tractor. When the dozer chassis pitches forwards, the blade begins to tilt forward and to drop closer to the ground. The control system senses this forward rotation of the blade and retracts the hydraulic cylinders that couple the blade to the chassis, causing the blade to return to and maintain its original position. Conversely, when the dozer chassis pitches backwards and the blade begins to tilt backward and rise higher above the ground, the control system extends the hydraulic cylinders coupling the blade to the chassis and lowers the blade, causing the blade to return to and maintain its original position with respect to the earth.

REFERENCES:
patent: 4807131 (1989-02-01), Clegg
patent: 4923015 (1990-05-01), Barsby et al.
patent: 4931463 (1990-06-01), Barbier et al.
patent: 5321643 (1994-06-01), Nakagami et al.
patent: 5462122 (1995-10-01), Yamamoto et al.
patent: 5462125 (1995-10-01), Stratton et al.
patent: 5485885 (1996-01-01), Matsushita et al.
patent: 5499684 (1996-03-01), Stratton
patent: 5503232 (1996-04-01), Matsushita et al.
patent: 5515927 (1996-05-01), Matsushita et al.
patent: 5535830 (1996-07-01), Matsushita et al.
patent: 5551518 (1996-09-01), Stratton
patent: 5555942 (1996-09-01), Matsushita et al.
patent: 5564507 (1996-10-01), Matsushita et al.
patent: 5572809 (1996-11-01), Steenwyk et al.
patent: 5584346 (1996-12-01), Sakamoto et al.
patent: 5620053 (1997-04-01), Kamikawa et al.
patent: 5631658 (1997-05-01), Gudat et al.
patent: 5694317 (1997-12-01), Nakagami et al.
patent: 5699248 (1997-12-01), Nakagami et al.
patent: 5799737 (1998-09-01), Kamikawa et al.
patent: 5816335 (1998-10-01), Yamamoto et al.
patent: 5819190 (1998-10-01), Nakagami et al.
patent: 5860480 (1999-01-01), Jayaraman et al.
patent: 5862868 (1999-01-01), Yamamoto et al.
patent: 5875854 (1999-03-01), Nakagami et al.
patent: 5880681 (1999-03-01), Codina et al.
patent: 5935183 (1999-08-01), Nakagami et al.
patent: 5950141 (1999-09-01), Yamamoto et al.
patent: 5951612 (1999-09-01), Nakagami et al.
patent: 5951613 (1999-09-01), Yamamoto et al.
patent: 5984018 (1999-11-01), Sahm et al.
patent: 5996703 (1999-12-01), Sahm et al.
patent: 6112145 (2000-08-01), Yamamoto et al.
patent: 6152238 (2000-11-01), Ferrell et al.
patent: 6181999 (2001-01-01), Yamamoto et al.
patent: 6278955 (2001-08-01), Hartman et al.
patent: 6286606 (2001-09-01), Krieg et al.
patent: 6295746 (2001-10-01), Meduna et al.
patent: 6317676 (2001-11-01), Gengler et al.
patent: 6364028 (2002-04-01), Ferrell et al.
patent: 6389345 (2002-05-01), Phelps
patent: 6615114 (2003-09-01), Skiba et al.
patent: 6655465 (2003-12-01), Carlson
patent: 6703939 (2004-03-01), Lehrman et al.
patent: 2002/0162668 (2002-11-01), Carlson et al.
patent: 3827617 (1990-02-01), None
patent: 3827618 (1990-02-01), None
patent: 3827619 (1990-02-01), None
patent: 0327649 (1989-08-01), None

Affiliated with

Also associated with

Rating

Bulldozer autograding system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bulldozer autograding system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bulldozer autograding system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3716877