Patents by Inventor Kevin R. Wayman

Kevin R. Wayman 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).

  • Valve assembly
    Patent number: 6796546
    Abstract: A valve assembly has a valve body with a bore formed therein. A valve spool is slidably disposed in the valve body. The valve spool has a plurality of valve lands that closely engage the valve bore to form substantially leak-free interfaces. The leading land has a diameter less than the land immediately adjacent thereto in a range of 0.34 mm to 0.17 mm, and a recess formed between the leading land and the first adjacent land. The recess has an inner diameter at least 0.75 mm less than said diameter of said leading land.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: September 28, 2004
    Assignee: General Motors Corporation
    Inventors: Kevin R. Wayman, Drew A. Crafton, Joel E. Mowatt
  • Valve assembly
    Publication number: 20040000658
    Abstract: A valve assembly has a valve body with a bore formed therein. A valve spool is slidably disposed in the valve body. The valve spool has a plurality of valve lands that closely engage the valve bore to form substantially leak-free interfaces. The leading land has a diameter less than the land immediately adjacent thereto in a range of 0.34 mm to 0.17 mm, and a recess formed between the leading land and the first adjacent land. The recess has an inner diameter at least 0.75 mm less than said diameter of said leading land.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 1, 2004
    Inventors: Kevin R. Wayman, Drew A. Crafton, Joel E. Mowatt