Patents by Inventor Etsusou Takehiro

Etsusou Takehiro 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).

  • Dual stage fluid clutch motor with electric controls including time delay
    Patent number: 4234066
    Abstract: A vehicle transmission with an automatic clutch is disclosed in which for gear shifting the clutch is disengaged with the assistance of a vacuum from a source of vacuum, via a control valve having a solenoid actuated clutch release valve and a clutch servo. Disengagement of the clutch is carried out when a gear shift lever is manipulated with an engine accelerator released. The reengagement of the clutch commences as soon as the flow of current to the solenoid for the clutch release valve is cut. The clutch release valve then disconnects the clutch servo from the source of vacuum. The reduction of the vacuum in the clutch servo takes place in two stages. In the first stage, the vacuum is reduced very quickly by means of a solenoid actuated air-on (air bleed) valve for a predetermined time after the flow of current to the solenoid for the clutch release valve has been cut until the clutch begins to engage or is about to engage.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: November 18, 1980
    Inventors: Hiroshi Toyota, Tamio Kawamoto, Etsusou Takehiro