Patents by Inventor Ian F. Smith

Ian F. Smith 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).

  • Rotary valve system and engine using the same
    Patent number: 7255082
    Abstract: Rotary valve system for controlling communication with a port in an internal combustion engine which, in one disclosed embodiment, has a crankshaft, compression and expansion pistons connected to the crankshaft for reciprocating movement within compression and expansion chambers, a combustion chamber in which air from the compression chamber is combined with fuel and burned to produce an increased gas volume.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: August 14, 2007
    Assignee: Zajac Optimum Output Motors, Inc.
    Inventors: John Zajac, Ian F. Smith