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:
Jan. 16, 1979
Filed:
Feb. 11, 1976
Kagehiko Yamamoto, Hitachi, JP;
Hideo Ito, Hitachi, JP;
Mizuho Tanaka, Hitachi, JP;
Shoji Sato, Hitachi, JP;
Hidetoshi Togashi, Hitachi, JP;
Isao Yanagida, Juomachi, JP;
Yukio Yamaguchi, Hitachi, JP;
Mutsuo Suzuki, Hitachi, JP;
Tadakazu Oguri, Hitachi, JP;
Hisanao Kita, Hitachi, JP;
Junzo Komatsu, Hitachi, JP;
Hitachi, Ltd., , JP;
Abstract
A water intake portion of a hydraulic machine consists of a casing and a speed ring positioned between the casing and guide vanes for guiding water from the casing to the guide vanes. The speed ring consists of a pair of upper and lower flat members of a ring form, a plurality of stay vanes positioned between the aforesaid pair of members for interconnecting same rigidly, and a reinforcing member of a cylindrical form, which is welded to the top surface of the upper flat member between the inner and outer circumferential edges of the upper flat member. Edges defining therebetween an opening of this casing are welded to the top surface of the upper flat member of a ring form, of the speed ring in the position between the aforesaid reinforcing member and the outer circumferential edge of the upper flat member, as well as to the undersurface of the lower flat member of a ring form, respectively. In this respect, the welding of the reinforcing member of a cylindrical form to the top surface of the upper flat member of a ring form is followed by the welding of the edges of the opening of the casing to the upper and lower flat members of a ring form.