Patents by Inventor LAWRENCE TOGNETTI

LAWRENCE TOGNETTI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Electronic high hydraulic pressure cutoff to improve system efficiency
    Patent number: 8887499
    Abstract: A method for overpressure control in a hydraulic system having multiple hydraulic pumps, with each hydraulic pump being connected by a respective hydraulic circuit for actuating a single respective hydraulic actuator, includes actuating a first variable displacement hydraulic pump, the first hydraulic pump being fluidly linked by a first hydraulic circuit to a first hydraulic actuator for powering the first hydraulic actuator. Upon detecting a pressure that exceeds a predetermined threshold pressure, the flow rate of the first hydraulic pump is electronically modified to a second flow rate lower than the first flow rate whereby the pressure in the first hydraulic circuit is reduced to a pressure that is below the predetermined threshold pressure.
    Type: Grant
    Filed: June 29, 2011
    Date of Patent: November 18, 2014
    Assignees: Caterpillar Inc., Purdue University
    Inventors: Brad Edler, Viral S. Mehta, Lawrence Tognetti, Christopher Williamson
  • ELECTRONIC HIGH HYDRAULIC PRESSURE CUTOFF TO IMPROVE SYSTEM EFFICIENCY
    Publication number: 20130000292
    Abstract: A method for overpressure control in a hydraulic system having multiple hydraulic pumps, with each hydraulic pump being connected by a respective hydraulic circuit for actuating a single respective hydraulic actuator, includes actuating a first variable displacement hydraulic pump, the first hydraulic pump being fluidly linked by a first hydraulic circuit to a first hydraulic actuator for powering the first hydraulic actuator. Upon detecting a pressure that exceeds a predetermined threshold pressure, the flow rate of the first hydraulic pump is electronically modified to a second flow rate lower than the first flow rate whereby the pressure in the first hydraulic circuit is reduced to a pressure that is below the predetermined threshold pressure.
    Type: Application
    Filed: June 29, 2011
    Publication date: January 3, 2013
    Applicant: CATERPILLAR INC.
    Inventors: BRAD EDLER, VIRAL S. MEHTA, LAWRENCE TOGNETTI, CHRISTOPHER WILLIAMSON