Patents by Inventor Douglas L. Devine

Douglas L. Devine 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).

  • Light weight valve lifter
    Patent number: 5458097
    Abstract: A mechanical valve lifter for racing applications. A very light weight valve lifter is formed by a structure which includes a thin-walled tubular outer member and a solid core member having spaced apart flanges or disks formed integral therewith to support the outer member. A plasma transferred arc welded cam-contacting surface is formed on one end of the lifter and a pushrod-contacting surface is formed on the other end.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: October 17, 1995
    Assignee: Eaton Corporation
    Inventors: Douglas L. Devine, David G. Williamson
  • Preloaded axle stake for roller follower
    Patent number: 5099807
    Abstract: A method for fixing an axle within a roller tappet in which a preload is applied to the axle in a direction perpendicular to its longitudinal axis while the ends of the axle are deformed into chambers formed in the ends of the axle-receiving aperture in the tappet body. In accordance with a preferred embodiment of the invention the axle ends are deformed by an orbital staking process.
    Type: Grant
    Filed: August 14, 1991
    Date of Patent: March 31, 1992
    Assignee: Eaton Corporation
    Inventor: Douglas L. Devine