Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Radial flow devices
Patent
1998-04-07
2000-03-21
Ryznic, John E.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Radial flow devices
416 5, F04D 2938
Patent
active
060395419
ABSTRACT:
Ceiling fan blades for low speed fan operation. The blades have a positive twist at the root motor portion of the blade and a slightly twisted rounded tip. The chord of the blades taper down from the root to the rounded tip, and have a tapered airfoil from the aft forward aft edge to the trailing edge. The airfoil has a combination of a rounded leading edge with sharp trailing edge, and a square leading edge and rounded trailing edge. The blades can be twenty inches in length and twenty-six inches in length, and be used in ceiling fans having two, three, four or more blades in a ceiling mount. The ceiling fan blades are optimized to operate in ceiling fans running at low speed ranges of approximately 50 to approximately 200 revolutions per minute(rpm) with an enhanced axial airflow which provide substantial energy savings and increased air flow over conventional flat planar ceiling fan blades.
REFERENCES:
patent: D355027 (1995-01-01), Young
patent: D382636 (1997-08-01), Yang
patent: 1506937 (1924-09-01), Miller
patent: 1903823 (1933-04-01), Lougheed
patent: 1942688 (1934-01-01), Davis
patent: 2283956 (1942-05-01), Smith
patent: 2345047 (1944-03-01), Houghton
patent: 2450440 (1948-10-01), Mills
patent: 2682925 (1954-07-01), Wosika
patent: 4197057 (1980-04-01), Hayashi
patent: 4325675 (1982-04-01), Gallot et al.
patent: 4411598 (1983-10-01), Okada
patent: 4416434 (1983-11-01), Thibert et al.
patent: 4730985 (1988-03-01), Rothman et al.
patent: 4782213 (1988-11-01), Teal
patent: 4844698 (1989-07-01), Gornstein et al.
patent: 4892460 (1990-01-01), Volk
patent: 4974633 (1990-12-01), Hickey
patent: 5033113 (1991-07-01), Wang
patent: 5114313 (1992-05-01), Vorus
patent: 5244349 (1993-09-01), Wang
patent: 5253979 (1993-10-01), Fradenburgh
patent: 5951162 (1999-09-01), Westman et al.
Hibbs Bart D.
Parker Danny S.
Su Guan Hua
Ryznic John E.
Steinberger Brian S.
University of Central Florida
LandOfFree
High efficiency ceiling fan does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High efficiency ceiling fan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High efficiency ceiling fan will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-725503