Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Pump outlet or casing portion expands in downstream direction
Reexamination Certificate
2005-04-20
2008-12-30
Verdier, Christopher (Department: 3745)
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Pump outlet or casing portion expands in downstream direction
C415S119000, C415S211100, C415S211200, C415S220000, C415S222000, C415S223000, C062S296000, C062S426000, C062S441000
Reexamination Certificate
active
07470108
ABSTRACT:
In an axial flow fan, for reducing fluid noise and further reducing the noise by suppressing solid-conveyed noise (structure-borne noise) generated by the vibration of an electric motor or the like, the axial flow fan is equipped with a propeller, a motor for driving the propeller, and a venturi portion disposed on the outer circumference side of the propeller and provided on its inner circumferential side with a bellmouth through which an air flow generated by the revolution of the propeller passes, wherein the bellmouth has an intake portion whose diameter contracts in a curved shape in the direction of the air flow, a cylindrical portion having a cylindrical shape, and a discharge portion whose diameter slantingly expands in the direction of the air flow.
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Iwase Taku
Kawamata Shouichi
Sekiguchi Osamu
Tanno Taro
Watanabe Masanori
Antonelli, Terry Stout & Kraus, LLP.
Japan Servo Co. Ltd.
Verdier Christopher
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