Patents by Inventor Kenneth Charles Pfiffner

Kenneth Charles Pfiffner 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: 8517394
    Abstract: A suspension system is provided that includes an axle configured to support a first wheel on a first lateral end of the axle, and a second wheel on a second lateral end of the axle. The suspension system also includes a steering assembly configured to rotate each wheel relative to the axle about a substantially vertical axis. In addition, the suspension system includes an actuating cylinder extending between the axle and a frame of a work vehicle. The actuating cylinder is configured to transition the frame between a lowered position that enables the steering assembly to rotate each wheel through a first range of motion without contact between the wheels and a component of the work vehicle, and a raised position that enables the steering assembly to rotate the wheels through a second range of motion, greater than the first range of motion.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: August 27, 2013
    Inventors: Kenneth Charles Pfiffner, Benjamin Lee McCash, David Rach
  • Publication number: 20130033011
    Abstract: A suspension system is provided that includes an axle configured to support a first wheel on a first lateral end of the axle, and a second wheel on a second lateral end of the axle. The suspension system also includes a steering assembly configured to rotate each wheel relative to the axle about a substantially vertical axis. In addition, the suspension system includes an actuating cylinder extending between the axle and a frame of a work vehicle. The actuating cylinder is configured to transition the frame between a lowered position that enables the steering assembly to rotate each wheel through a first range of motion without contact between the wheels and a component of the work vehicle, and a raised position that enables the steering assembly to rotate the wheels through a second range of motion, greater than the first range of motion.
    Type: Application
    Filed: August 1, 2012
    Publication date: February 7, 2013
    Applicant: CNH America LLC
    Inventors: Kenneth Charles Pfiffner, Benjamin Lee McCash, David Rach