Earth working – Automatic power control – Land leveller type
Patent
1981-04-15
1984-02-14
Stouffer, Richard T.
Earth working
Automatic power control
Land leveller type
E02F 376, A01B 63111
Patent
active
044310609
ABSTRACT:
An earth working machine having an earth shaping blade (30) employs a control system for maintaining the blade (30) at a desired slope relative to a reference grade irrespective of lateral movement of the blade (30) or deflection of front and rear frame sections (15, 18). A ground engaging trailing wheel (96) mounted at the rear of the blade (30) senses rotation of the blade (30) relative to the direction of machine travel resulting from rotation or lateral shifting of the blade (30) and operates a potentiometer (124) to produce a control signal proportional to the magnitude of blade rotation. A first pair of accelerometers (128, 130) mounted on the blade (30) for rotation by the trailing wheel (96) produces blade controlling signals respectively corresponding to the change in slope and pitch of the blade (30) relative to the front frame section (15) of the machine. A second pair of accelerometers (42, 44) mounted at transversely spaced locations on the front frame section (15) produce control signals indicative of the roll of the front frame section (15) while an additional accelerometer (90) mounted on the rear frame section (18) produces control signals indicative of the frame pitch. An electronic circuit (94) algebraically combines the control signals for use in controlling the operation of a pair of hydraulic cylinders (38, 40) which maintain the blade (30) at a desired slope.
REFERENCES:
patent: 3052997 (1962-09-01), Holland
patent: 3229391 (1966-01-01), Breitbarth et al.
patent: 3328905 (1967-07-01), Page et al.
patent: 3486564 (1969-12-01), Page et al.
patent: 3495663 (1970-02-01), Scholl et al.
patent: 3540360 (1970-11-01), Snow et al.
patent: 3610341 (1971-10-01), Swisher, Jr. et al.
patent: 3786871 (1974-01-01), Long et al.
patent: 3791452 (1974-02-01), Long et al.
patent: 3896899 (1975-07-01), Scholl
patent: 3899028 (1975-08-01), Morris et al.
patent: 3974699 (1976-08-01), Morris et al.
patent: 4140420 (1979-02-01), Swisher, Jr. et al.
Brochure: "The Grad-Line G.S. 300 Grader Control System", published by Grad-Line, Inc., Woodinville, Wash.
Brochure: "Automatic Blade Control for No. 12F, 14E and 16 Motor Graders", published by Caterpillar Tractor Co. Peoria, Il.
Article: "Grading and Compacting Machinery", Ch 19, Moving the Earth, the Workbook of Excavation by H. L. Nichols, 3rd Edition.
Easterling Gene B.
Scholl Rolland D.
Caterpillar Tractor Co.
Stouffer Richard T.
LandOfFree
Earth working machine and blade condition control system therefo does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Earth working machine and blade condition control system therefo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth working machine and blade condition control system therefo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2370201