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:
Apr. 19, 2005
Filed:
Feb. 11, 2004
Kazuo Nishihama, Hitachi, JP;
Kazumasa Ide, Hitachiota, JP;
Tetsuo Fujigaki, Hitachi, JP;
Shuuji Mizutani, Hitachinaka, JP;
Takeshi Nakayama, Hitachi, JP;
Kazuo Nishihama, Hitachi, JP;
Kazumasa Ide, Hitachiota, JP;
Tetsuo Fujigaki, Hitachi, JP;
Shuuji Mizutani, Hitachinaka, JP;
Takeshi Nakayama, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h=27 mm or more in the case where rotor conductors are made of brass, and a height h=7 mm or more in the case where the rotor conductors are made of copper.