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:
Sep. 18, 2007
Filed:
Apr. 06, 2006
Applicants:
Masayuki Hirota, Narashino, JP;
Mingxi Huang, Narashino, JP;
Satoshi Ibori, Yachimata, JP;
Yutaka Maeno, Yotsukaido, JP;
Inventors:
Masayuki Hirota, Narashino, JP;
Mingxi Huang, Narashino, JP;
Satoshi Ibori, Yachimata, JP;
Yutaka Maeno, Yotsukaido, JP;
Assignee:
Hitachi Industrial Equipment Systems Co. Ltd., Chiba-Shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
A frequency converter includes a circuit substrate, a housing that covers at least the circuit substrate, a radiating section in which gases at an intake face are exhausted from an exhaust face so as to radiate heat, a fan provided on the exhaust face of the radiating section, and a guide provided on the housing to direct gases around the circuit substrate toward the intake face.