Rotary kinetic fluid motors or pumps – With sound or vibratory wave absorbing or preventing means...
Patent
1996-09-04
1998-01-13
Verdier, Christopher
Rotary kinetic fluid motors or pumps
With sound or vibratory wave absorbing or preventing means...
4152085, 4152111, 4152141, 415914, 416247R, 361695, F04D 2966
Patent
active
057072051
ABSTRACT:
An air moving device for improving P-Q characteristics and noise by suppressing the production of vortices. An annular wall spaced from blade tips, is formed of a plurality of annular plates and spacers with a slit defined between adjacent annular plates. The width of each slit is set to satisfy the formula W.ltoreq.(.nu..multidot.R.sub.ec /v) where .nu. is the kinematic viscosity of air, v is the peripheral speed of the blade tips, W is the width of the slits and R.sub.ec is the critical Reynold's number. Thus, as a fan is rotated, air is drawn in a laminar flow through the slits to the inner periphery of the annular wall. Thereby, it is possible to suppress the separation of air flow on the suction side of blade surfaces and the production of vortices, thus improving the air moving state.
REFERENCES:
patent: 2628018 (1953-02-01), Koch
patent: 2628020 (1953-02-01), Koch
patent: 3574480 (1971-04-01), Hoepfner
patent: 5288203 (1994-02-01), Thomas
patent: 5292088 (1994-03-01), Lemont
patent: 5393197 (1995-02-01), Lemont et al.
patent: 5407324 (1995-04-01), Starnes, Jr. et al.
Matsushita Electric - Industrial Co., Ltd.
Verdier Christopher
LandOfFree
Fan device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-321110