Rotary kinetic fluid motors or pumps – Plural runners supported for relative motion or on separate... – Serially spaced in working fluid flow path
Reexamination Certificate
2007-01-02
2007-01-02
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Plural runners supported for relative motion or on separate...
Serially spaced in working fluid flow path
C415S199500, C416S128000, C416S19800R
Reexamination Certificate
active
10500603
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.
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Aizawa Yoshihiko
Ishihara Katsumichi
Kaise Takashi
Nakamura Toshiyuki
Nishimura Seiji
Hanan Devin
Look Edward K.
Rankin, Hill Porter & Clark LLP
Sanyo Denki Co. Ltd.
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