Patents by Inventor Doyle G. Heyveld

Doyle G. Heyveld 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).

  • System and method of establishing a reliability characteristic
    Patent number: 7653516
    Abstract: The present invention includes a method and system configured to establish a reliability characteristic associated with a part type. The method includes the step of establishing a use associated with a part, the part being of the part type, establishing an amount of usage associated with the part, establishing a service characteristic associated with said part, and establishing the reliability characteristic associated with the part type in response to said part use the part usage, and the part service characteristic.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: January 26, 2010
    Assignee: Caterpillar Inc.
    Inventors: Prakash B. Babu, Doyle G. Heyveld, Robert H. Yonker
  • System and method of establishing a reliability characteristic
    Publication number: 20040172573
    Abstract: The present invention includes a method and system configured to establish a reliability characteristic associated with a part type. The method includes the step of establishing a use associated with a part, the part being of the part type, establishing an amount of usage associated with the part, establishing a service characteristic associated with said part, and establishing the reliability characteristic associated with the part type in response to said part use the part usage, and the part service characteristic.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 2, 2004
    Inventors: Prakash B. Babu, Doyle G. Heyveld, Robert H. Yonker
  • Method and apparatus for calculating work cycle times
    Patent number: 5955706
    Abstract: In one aspect of the present invention, a method for determining the work cycle of an earth moving machine is disclosed. The machine has a transmission, a work implement, and a lift cylinder and a tilt cylinder connected to the work implement. The method includes the steps of determining a lift cylinder head end pressure, a displacement of the lift cylinder, a displacement of the tilt cylinder, and a direction of travel of the machine. The method further includes determining the work cycle of the machine in response to the displacement of the tilt and lift cylinders, and the lift cylinder head end pressure.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: September 21, 1999
    Assignee: Caterpillar Inc.
    Inventors: Andrew O. Fonkalsrud, Doyle G. Heyveld, Eric A. Reiners
  • Fatigue analysis and warning system
    Patent number: 5531122
    Abstract: In the field of large construction and mining equipment, significant frame stresses considerably shorten the expected operating life of a machine. This invention provides indications of significant frame stresses on machines having a ground engaging portion, a frame connected to the ground engaging portion, and a plurality of pressure sensing devices. Each of the pressure sensing devices are adapted to produce pressure signals indicative of loads imparted on the frame. The pressure signals are processed to produce frame stress data.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: July 2, 1996
    Assignee: Caterpillar Inc.
    Inventors: Michael D. Chatham, Paul D. Fotsch, Doyle G. Heyveld, Edward P. Kelley, Walter E. Lohmann, Jr., David R. Roley, Charles F. Sieck, David G. Young