Patents by Inventor Takatoshi Watababe

Takatoshi Watababe 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).

  • CONTROL VALVE
    Publication number: 20140007965
    Abstract: A control valve have a main flow passage; a flow passage sectional area adjustment spool; a downstream side branch flow passage; a communicating flow passage; a flow passage opening/closing valve; a flow passage opening/closing spool; and an upstream side branch flow passage. The flow passage opening/closing valve cuts off the downstream side branch flow passage from the communicating flow passage in a low rotation region of an engine. In a medium rotation region, the flow passage opening/closing valve connects the downstream side branch flow passage to the communicating flow passage and the flow passage opening/closing spool allows the communicating flow passage to communicate. In a high rotation region, the flow passage opening/closing spool blocks the communicating flow passage.
    Type: Application
    Filed: July 2, 2013
    Publication date: January 9, 2014
    Inventors: Junichi Miyajima, Hidehiko Koyashiki, Takatoshi Watababe