Patents by Inventor Lance M. Cowper

Lance M. Cowper 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).

  • Patent number: 11821173
    Abstract: A mobile machine includes front and rear ends, a frame, rotatably supported ground engaging mechanisms, and an electrical drive system. The electrical drive system includes a source of electrical energy, an inverter, at least one electric motor operatively coupled to rotate at least one of the ground engaging mechanisms, a plurality of first electric cables electrically coupling the source of electrical energy to the inverter, and a plurality of second electric cables electrically coupling the inverter to the electric motor. The inverter is disposed in the mobile machine in a vertical orientation at the rear end of the machine.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: November 21, 2023
    Assignee: Caterpillar Inc.
    Inventors: Randy D. Stoecker, David A. Gleissner, Lance M. Cowper, Kurt D. Smeltzer
  • Patent number: 11358576
    Abstract: A braking system is disclosed. The braking system may include a controller configured to determine a power limit for one or more brakes of a machine based on a temperature of the one or more brakes during engagement of the one or more brakes according to a commanded power. The power limit may be a power at which the temperature of the one or more brakes ceases to increase. The controller may be configured to determine a speed adjustment for the machine based on the power limit and the commanded power, and cause adjustment to a speed of the machine based on the determined speed adjustment.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: June 14, 2022
    Assignee: Caterpillar Inc.
    Inventors: Brian D. Kuras, Ankit Sharma, Lance M. Cowper
  • Publication number: 20210261072
    Abstract: A drive system is disclosed. The drive system may include a motor case, a generator located externally at a first side of the motor case, an inverter located externally at a second side of the motor case, and at least one tube internal to the motor case. The at least one tube may be configured to carry at least one power cable that connects the generator and the inverter.
    Type: Application
    Filed: February 21, 2020
    Publication date: August 26, 2021
    Applicant: Caterpillar Inc.
    Inventors: Randy D. STOECKER, Brian KRUG, Lance M. COWPER, Gregory AUSTIN, Joshua HICKE
  • Patent number: 11052886
    Abstract: A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: July 6, 2021
    Assignee: Caterpillar Inc.
    Inventors: Brandon J. Schwoerer, Lance M. Cowper
  • Publication number: 20210122347
    Abstract: A braking system is disclosed. The braking system may include a controller configured to determine a power limit for one or more brakes of a machine based on a temperature of the one or more brakes during engagement of the one or more brakes according to a commanded power. The power limit may be a power at which the temperature of the one or more brakes ceases to increase. The controller may be configured to determine a speed adjustment for the machine based on the power limit and the commanded power, and cause adjustment to a speed of the machine based on the determined speed adjustment.
    Type: Application
    Filed: October 25, 2019
    Publication date: April 29, 2021
    Applicant: Caterpillar Inc.
    Inventors: Brian D. KURAS, Ankit SHARMA, Lance M. COWPER
  • Publication number: 20210086738
    Abstract: A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.
    Type: Application
    Filed: September 20, 2019
    Publication date: March 25, 2021
    Applicant: Caterpillar Inc.
    Inventors: Brandon J. Schwoerer, Lance M. Cowper
  • Publication number: 20210087789
    Abstract: A mobile machine includes front and rear ends, a frame, rotatably supported ground engaging mechanisms, and an electrical drive system. The electrical drive system includes a source of electrical energy, an inverter, at least one electric motor operatively coupled to rotate at least one of the ground engaging mechanisms, a plurality of first electric cables electrically coupling the source of electrical energy to the inverter, and a plurality of second electric cables electrically coupling the inverter to the electric motor. The inverter is disposed in the mobile machine in a vertical orientation at the rear end of the machine.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 25, 2021
    Applicant: Caterpillar Inc.
    Inventors: Randy D. Stoecker, David A. Gleissner, Lance M. Cowper, Kurt D. Smeltzer
  • Patent number: 9863120
    Abstract: A control system for a work implement of a machine having a frame is provided. The control system includes a pair of lift cylinders operatively coupled to the work implement and configured to raise or lower the work implement with respect to the frame. Each of the lift cylinders has a rod end and a cap end. The control system includes a first cross-over line configured to fluidly communicate the rod ends to each other and a second cross-over line configured to fluidly communicate the cap ends to each other. The control system includes a cross-over valve disposed in one of the first and second cross-over lines and configured to regulate a flow of hydraulic fluid therethrough. The control system further includes a controller communicably coupled to the cross-over valve and configured to at least partially close the cross-over valve during a dump cycle of the work implement.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: January 9, 2018
    Assignee: Caterpillar Inc.
    Inventors: William N. O'Neill, Lance M. Cowper, Michael T. Jackson
  • Publication number: 20160319512
    Abstract: A control system for a work implement of a machine having a frame is provided. The control system includes a pair of lift cylinders operatively coupled to the work implement and configured to raise or lower the work implement with respect to the frame. Each of the lift cylinders has a rod end and a cap end. The control system includes a first cross-over line configured to fluidly communicate the rod ends to each other and a second cross-over line configured to fluidly communicate the cap ends to each other. The control system includes a cross-over valve disposed in one of the first and second cross-over lines and configured to regulate a flow of hydraulic fluid therethrough. The control system further includes a controller communicably coupled to the cross-over valve and configured to at least partially close the cross-over valve during a dump cycle of the work implement.
    Type: Application
    Filed: April 29, 2015
    Publication date: November 3, 2016
    Applicant: Caterpillar Inc.
    Inventors: William N. O'Neill, Lance M. Cowper, Michael T. Jackson
  • Patent number: 8182024
    Abstract: A system is disclosed for connecting a cab to a machine supporting frame. A sub-frame is secured to the machine supporting frame and is configured to tilt relative to the machine supporting frame. A plurality of vibration damping mechanisms is configured to at least partially inhibit transmission of shocks and vibrations between the sub-frame and the cab. A plurality of dead stop mechanisms is configured to limit movement between the sub-frame and the cab. A rigid connection between the machine supporting frame and the sub-frame is configured to be selectively disconnected. A pivot connection between the machine supporting frame and the sub-frame is configured to permit the sub-frame and the cab to be tilted relative to the machine supporting frame upon disconnection of the rigid connection.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: May 22, 2012
    Assignee: Caterpillar Inc.
    Inventors: Aaron R. Hayes, Christopher D. Derham, Lance M. Cowper, Ralph J. Lee
  • Patent number: 8025114
    Abstract: A differential steering control system and method for a machine includes a motor for steering the machine in a leftwards or a rightwards direction, a continuously variable transmission for moving the machine in a forwards or a backwards direction, and a control unit connected to the motor and the continuously variable transmission. The control unit determines the speed of the continuously variable transmission and based upon the determined speed, modifies a speed of the motor in order to achieve/maintain a desired turn radius for the machine.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: September 27, 2011
    Assignee: Caterpillar Inc.
    Inventors: Harold D. Dabbs, Eric D. Stemler, Lance M. Cowper, Richard F. Shults
  • Publication number: 20110186361
    Abstract: A differential steering control system and method for a machine includes a motor for steering the machine in a leftwards or a rightwards direction, a continuously variable transmission for moving the machine in a forwards or a backwards direction, and a control unit connected to the motor and the continuously variable transmission. The control unit determines the speed of the continuously variable transmission and based upon the determined speed, modifies a speed of the motor in order to achieve/maintain a desired turn radius for the machine.
    Type: Application
    Filed: March 28, 2011
    Publication date: August 4, 2011
    Applicant: CATERPILLAR, INC.
    Inventors: Harold D. Dabbs, Eric D. Stemler, Lance M. Cowper, Richard F. Shults
  • Patent number: 7942220
    Abstract: A differential steering control system and method for a machine includes a motor for steering the machine in a leftwards or a rightwards direction, a continuously variable transmission for moving the machine in a forwards or a backwards direction, and a control unit connected to the motor and the continuously variable transmission. The control unit determines the speed of the continuously variable transmission and based upon the determined speed, modifies a speed of the motor in order to achieve/maintain a desired turn radius for the machine.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: May 17, 2011
    Assignee: Caterpillar Inc.
    Inventors: Harold D. Dabbs, Eric D. Stemler, Lance M. Cowper, Richard F. Shults
  • Publication number: 20090085377
    Abstract: A system is disclosed for connecting a cab to a machine supporting frame. A sub-frame is secured to the machine supporting frame and is configured to tilt relative to the machine supporting frame. A plurality of vibration damping mechanisms is configured to at least partially inhibit transmission of shocks and vibrations between the sub-frame and the cab. A plurality of dead stop mechanisms is configured to limit movement between the sub-frame and the cab. A rigid connection between the machine supporting frame and the sub-frame is configured to be selectively disconnected. A pivot connection between the machine supporting frame and the sub-frame is configured to permit the sub-frame and the cab to be tilted relative to the machine supporting frame upon disconnection of the rigid connection.
    Type: Application
    Filed: December 4, 2008
    Publication date: April 2, 2009
    Inventors: Aaron R. Hayes, Christopher D. Derham, Lance M. Cowper, Ralph J. Lee
  • Publication number: 20080153662
    Abstract: A differential steering control system and method for a machine includes a motor for steering the machine in a leftwards or a rightwards direction, a continuously variable transmission for moving the machine in a forwards or a backwards direction, and a control unit connected to the motor and the continuously variable transmission. The control unit determines the speed of the continuously variable transmission and based upon the determined speed, modifies a speed of the motor in order to achieve/maintain a desired turn radius for the machine.
    Type: Application
    Filed: March 21, 2007
    Publication date: June 26, 2008
    Inventors: Harold D. Dabbs, Eric D. Stemler, Lance M. Cowper, Richard F. Shults