Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Reexamination Certificate
2007-10-16
2007-10-16
Look, Edward K. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Rotor having flow confining or deflecting web, shroud or...
Radially extending web or end plate
C416S187000
Reexamination Certificate
active
11313173
ABSTRACT:
Each of blades of a multi-blade centrifugal blower is provided with a taper portion, which is arranged at an inside periphery at least at the side of one rotation-shaft-direction end of the blade and tapers from the side of other rotation-shaft-direction end of the blade toward the side of the one rotation-shaft-direction end. The taper portion is positioned at a rotation-direction front side with respect to a back portion disposed at the side of the other rotation-shaft-direction end of the blade. Each of inlet angles throughout the taper portion is set in a range from 55° to 74°. Therefore, air flowing speed at an outlet of an impeller wheel is uniformed throughout the blade width. Work capacity and efficiency of the impeller wheel are increased, while noise is reduced.
REFERENCES:
patent: 6299409 (2001-10-01), Matsunaga et al.
patent: 61-107000 (1986-05-01), None
patent: 04-005500 (1992-01-01), None
patent: 2001-115997 (2001-04-01), None
Imahigashi Shoichi
Mitsuishi Yasushi
Ochiai Toshinori
Sakai Masaharu
Denso Corporation
Harness Dickey & Pierce PLC
Look Edward K.
Nippon Soken Inc.
White Dwayne J
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