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. 02, 2007
Filed:
Apr. 28, 2003
Honami Oosawa, Nagano, JP;
Katsumichi Ishihara, Nagano, JP;
Toshiyuki Nakamura, Nagano, JP;
Takashi Kaise, Nagano, JP;
Yoshihiko Aizawa, Nagano, JP;
Seiji Nishimura, Nagano, JP;
Honami Oosawa, Nagano, JP;
Katsumichi Ishihara, Nagano, JP;
Toshiyuki Nakamura, Nagano, JP;
Takashi Kaise, Nagano, JP;
Yoshihiko Aizawa, Nagano, JP;
Seiji Nishimura, Nagano, JP;
Sanyo Denki Co., Ltd., Tokyo, JP;
Abstract
An axial-flow fan with double impellers is provided that can produce a larger amount of air and a higher static pressure than can be achieved with conventional fans. The axial-flow fan with double impellers has a first axial-flow fan unit and a second axial-flow fan unit. The first axial-flow fan unit includes a first case, a first impeller and a plurality of webs that fix a first motor to the first case. The second axial-flow fan unit includes a second case, a second impeller and a plurality of webs that fix a second motor to the second case. The first case and the second case are coupled together to form a housing. The webs of the first axial-flow fan unit and the webs of the second axial-flow fan unit are combined together to form a plurality of stationary webs arranged in the housing. The number of front blades provided at the first impeller is set to five, the number of stationary blades is set to three, and the number of rear blades provided at the second impeller is set to four.