The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 1979
Filed:
Jan. 24, 1978
Yozo Kawase, Yokohama, JP;
Makoto Fujisaki, Musashino, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
In a method of operating a pump turbine, compressed air is supplied into a runner chamber of the turbine and a leakage drain valve is opened of a guide vane at the time of starting the pump turbine to force downwardly the level of the water in the runner chamber and to rotate a runner of the pump turbine in air, the compressed air in the runner chamber is exhausted when the rotating speed of the runner reaches a rated speed for the pump operation, thus filling the runner chamber with water. The water containing a large quantity of dissolved oxygen and contained near the periphery of the runner is drained into a spillway through a pipe for draining water leakage through the guide vanes, priming pressure in the runner chamber is detected and a leakage drain valve in the drain pipe is closed after a predetermined time from the detection of the priming pressure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile