Patents by Inventor Christopher P. Cherwin

Christopher P. Cherwin 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).

  • Publication number: 20150136523
    Abstract: A ladder is provided. The ladder includes a frame having a first side wall and a second side wall. The first and second side walls are connected by a plurality of steps. The plurality of steps is provided in an axially spaced apart arrangement relative to each other. The ladder also includes an actuator coupled to the frame. The actuator is configured to provide a rotary movement to the frame for positioning the ladder in any one of a deployed position and a stowed position. The ladder further includes a torsion plate. The torsion plate is provided on the frame in cooperation with the actuator. The torsion plate is configured to transfer at least a portion of a torque associated with the rotary movement from the first side wall to the second side wall.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Applicant: Caterpillar Inc.
    Inventors: Robert J. Madera, Joshua C. Bedyk, Christopher P. Cherwin, John M. Teter
  • Patent number: 8011474
    Abstract: A device for accessing an elevated entry position on a machine including an operator position includes a platform, which includes a step surface, configured to ascend and descend between a base position and the elevated entry position, wherein the platform remains within an existing envelope of the machine throughout ascent, descent, and storage of the platform, and wherein the ascending and descending proceeds along an axis substantially orthogonal to the step surface. The device may further include a lifting mechanism operatively connected to the machine and the platform.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: September 6, 2011
    Assignee: Caterpillar Inc.
    Inventors: Robin M. Boroski, Miguel A. Palacios, Eric R. O'Brien, Todd R. Okimoto, Christopher P. Cherwin, Marius G. Enescu, Byron D. Collis, Eric W. Cler, Kevin L. Duel
  • Publication number: 20080099282
    Abstract: A device for accessing an elevated entry position on a machine including an operator position includes a platform, which includes a step surface, configured to ascend and descend between a base position and the elevated entry position, wherein the platform remains within an existing envelope of the machine throughout ascent, descent, and storage of the platform, and wherein the ascending and descending proceeds along an axis substantially orthogonal to the step surface. The device may further include a lifting mechanism operatively connected to the machine and the platform.
    Type: Application
    Filed: October 30, 2006
    Publication date: May 1, 2008
    Inventors: Robin M. Boroski, Miguel A. Palacios, Eric R. O'Brien, Todd R. Okimoto, Christopher P. Cherwin, Marius G. Enescu, Byron D. Collis, Eric W. Cler, Kevin L. Duel