Patents by Inventor Hideo Kamamura

Hideo Kamamura 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).

  • Variable-cycle engine
    Patent number: 5022353
    Abstract: A variable-cycle engine operates in a two-cycle mode when the rotational speed of the engine is lower than a predetermined speed and in a four-cycle mode when the rotational speed of the engine is higher than the predetermined speed. The engine has a first intake port and an exhaust port which are defined in an upper portion of a cylinder, and a second intake port defined in a lower side portion of the cylinder. When the rotational speed of the engine is lower than the predetermined speed, the engine operates as a two-cycle engine with the second intake valve and the exhaust valve in operation. When the rotational speed of the engine is higher than the predetermined speed, the engine operates as a four-cycle engine with the first intake port and the exhaust port in operation.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: June 11, 1991
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventor: Hideo Kamamura