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. 09, 2010
Filed:
Jun. 20, 2007
Takayoshi Nakamura, Hitachi, JP;
Akihiro Tamba, Hitachinaka, JP;
Ryuichi Saito, Hitachi, JP;
Atsuo Nishihara, Kashiwa, JP;
Takayoshi Nakamura, Hitachi, JP;
Akihiro Tamba, Hitachinaka, JP;
Ryuichi Saito, Hitachi, JP;
Atsuo Nishihara, Kashiwa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An inverter apparatus includes a liquid path in which cooling water flows, and in which the cooling water performs cooling at a cooling part located directly underneath the power circuit part of the inverter apparatus. The liquid path includes a first partial structure part formed between a feed pipe and the cooling part, and having a liquid path cross-sectional profile that is gradually reduced in the short-side direction of the cooling part and that is gradually enlarged in the long-side direction thereof; and a second partial structure part formed between the cooling part and a drain pipe, and having a liquid path cross-sectional profile that is gradually enlarged from the short-side of the cooling part and that is gradually reduced from the long-side thereof.