Patents Represented by Attorney Finnegan,Henderson,Farrobow,Garrett&Dunner

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  • Hydraulic cylinder life prediction
    Patent number: 7120523
    Abstract: Maintenance requirements for hydraulic cylinders used to actuate heavy equipment may be predicted by measuring actual use of the cylinders. Sensors measuring piston position within each cylinder are integrated and the results stored in histograms bins to provide a permanent record of motion. Hydraulic pressure and temperature are also recorded. Data are downloaded periodically and compared with data from laboratory tests and/or from other units in the field.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: October 10, 2006
    Assignee: Caterpillar Inc.
    Inventor: Thomas P. Muller