Patents by Inventor Shawn K. Martin

Shawn K. Martin 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).

  • Combustion chamber drain system
    Patent number: 5632659
    Abstract: An apparatus for quickly and virtually complete purging of seawater from combustion chambers of an outboard engine that has been submerged or a submersible outboard engine. A poppet valve is incorporated in the combustion chamber portion of the engine head. The valve has discharge ports radially disposed around its periphery so that when the poppet valve is pneumatically operated, the ports permit the discharge of entrapped water from the combustion chamber as the engine is turned over.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: May 27, 1997
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Shawn K. Martin, William A. Garnett, William W. McCrory