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:
Nov. 04, 2008
Filed:
Sep. 13, 2006
Katsumichi Ishihara, Nagano, JP;
Honami Oosawa, Nagano, JP;
Katsumichi Ishihara, Nagano, JP;
Honami Oosawa, Nagano, JP;
Sanyo Denki Co., Ltd., Tokyo, JP;
Abstract
A first motorrotates, in one of two rotating directions, the first impellerincluding a plurality of front bladesin a suction opening portionof a housing. The second motorrotates, in the other rotating direction opposite to the one rotating direction, the second impellerincluding a plurality of rear bladesin a discharge opening portionof the housing. A plurality of stationary bladesare arranged between the first impellerand the second impellerin the housing. When the number of the front bladesis N, that of the stationary bladesis M, and that of the rear bladesis P, their relationship is defined as N>P>M. A length Lof the front bladesmeasured in an axial direction is set longer than a length Lof the rear bladesmeasured in the axial direction.