US Patent No: 4,919,222

Number of patents in Portfolio can not be more than 2000

Dynamic payload monitor

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Abstract

A dynamic payload monitor measures and displays payload weight for a loader vehicle by sensing the hydraulic pressure and position of the lift arm cylinders. The payload weight is computed by curve fitting the sensed cylinder pressure and position data to a second order polynomial, and then performing interpolation or extrapolation with a pair of pressure versus position reference parabolas obtained during calibration. The weight computation algorithms used in the dynamic payload monitor are applicable to a number of work vehicles having at least one work implement linkage and at least one hydraulic cylinder for modifying the linkage geometry.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CATERPILLAR INC.PEORIA, IL5394

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kyrtsos, Christos T Peoria, IL 59 1957
Worrell, Dean A Peoria, IL 7 101

Cited Art

Patent Info (Count) # Cites Year
 
KABUSHIKI KAISHA KOMATSU SEISAKUSHO (1)
4,588,038 Load weight measuring method 24 1985
 
KABUSHIKI KAISHA TOYODA JIDOSHOKKI SEISAKUSHO (1)
4,511,974 Load condition indicating method and apparatus for forklift truck 72 1982
 
KILO-WATE, INC. (1)
4,390,075 Load weighing and accumulating system and method 6 1980
 
PIT CONTROL INC. (1)
4,677,579 Suspended load measurement system 36 1985
 
SNEAD, SUZANNE KERR, (1)
4,230,196 Load weighing and accumulating system and method for hydraulic loader 43 1978

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CATERPILLAR INC. (19)
5,105,895 Method and apparatus for identifying load cycle functions 17 1990
5,082,071 Method and apparatus for monitoring payload 18 1990
5,070,953 Dynamic payload monitor 21 1990
5,067,572 Dynamic payload monitor 27 1990
5,182,712 Dynamic payload monitor 22 1990
5,105,896 Dynamic payload monitor 24 1991
5,850,341 Method and apparatus for monitoring material removal using mobile machinery 30 1994
5,509,293 Dynamic payload monitor 24 1994
5,848,368 Method for controllably loading haul vehicles by a mobile loading machine 22 1996
5,844,800 Shot-rock diggability monitor 10 1996
5,944,764 Method for monitoring the work cycle of earth moving machinery during material removal 9 1997
6,211,471 Control system for automatically controlling a work implement of an earthmoving machine to capture, lift and dump material 24 1999
6,518,519 Method and apparatus for determining a weight of a payload 11 2000
6,601,013 Method and apparatus configured to determine the weight of a machine payload 8 2000
8,340,872 Control system and method for capturing partial bucket loads in automated loading cycle 0 2007
8,229,631 Wheel tractor scraper production optimization 0 2007
8,365,637 Drop box for powertrain 0 2007
8,156,048 Adaptive payload monitoring system 0 2008
8,160,783 Digging control system 0 2008
 
GENERAL ELECTRODYNAMICS CORPORATION (2)
5,131,482 Self-contained weighing system and method 7 1989
5,270,494 Self-contained weighing system and method 3 1992
 
ACTRONIC LIMITED (1)
8,271,229 Weight estimation for excavator payloads 0 2008
 
ASSOCIATION POUR LA RATIONALISATION ET LA MECANISATION DE L'EXPOLOITATIONFORESTIERE A.P.M.F.F. (1)
5,167,287 Process and devices for dynamic measurement of a load in displacement in a vertical plane 6 1992
 
ATLAS COPCO WAGNER, INC. (1)
5,659,470 Computerized monitoring management system for load carrying vehicle 59 1994
 
CASELLA WASTE SYSTEMS, INC. (1)
5,119,894 Weighing apparatus for weighing the contents of a refuse container and method 26 1991
 
CATTRON-THEIMEG CANADA LTD. (1)
5,941,921 Sensor feedback control for automated bucket loading 17 1997
 
CNH AMERICA LLC (1)
6,086,509 Method and apparatus for transmission clutch modulation during gear shift based on payload and selected direction 9 1999
 
HARDY PROCESS SOLUTIONS (1)
5,837,945 Refuse weighing system and method 25 1996
 
HARNISCHFEGER TECHNOLOGIES, INC. (1)
6,225,574 Load weighing system for a heavy machinery 10 1998
 
HITACHI CONSTRUCTION MACHINERY CO., LTD. (1)
6,122,598 Measurement and display of load of excavating blasted ground 1 1998
 
JUNIPER SYSTEMS INC. (1)
5,487,702 Grain weighing and measuring system 20 1994
 
YAZAKI ENERGY SYSTEM CORPORATION (1)
6,961,676 Apparatus for supporting maintenance check of a sensor 0 2004
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (3)
5,173,079 Crop testing and evaluation system 25 1991
5,327,708 Crop testing and evaluation system 48 1991
5,220,968 Productivity monitoring system for loading machinery 22 1992