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:
Feb. 26, 1980
Filed:
Mar. 16, 1977
Shunzo Tomioka, Hitachi, JP;
Masaaki Nakano, Hitachi, JP;
Akira Suzuki, Tokyo, JP;
Shizuichi Sakamoto, Shimoinayoshi, JP;
Hitachi, Ltd., , JP;
Abstract
An impeller secured to a shaft in a vertical type sodium turbine pump is interposed between a suction tube and an impeller casing. A mouth ring in an impeller is positioned in the close proximity of a lower ring secured to the suction tube, while an impeller ring protruding from a crown ring is positioned in the close proximity of an upper ring secured to an impeller casing, with a given clearance maintained therebetween. Pockets are provided in the surface of the mouth ring positioned close to the lower ring as well as in the surface of the impeller ring positioned close to the upper ring, so that there may be produced a static bearing action by molten sodium between the mouth ring and the lower ring, as well as between the impeller ring and the upper ring.