Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Reverse curve surface
Reexamination Certificate
2007-09-20
2011-12-20
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Reverse curve surface
C416S243000
Reexamination Certificate
active
08079823
ABSTRACT:
A fan blade comprises an airfoil having an upper surface with region that has a generally elliptical curvature. In some examples, the lower surface has a convex region and a concave region. The curvature of the concave region corresponds with the generally elliptical curvature of the upper surface; while the curvature of the convex region is defined by a substantially constant radius. Some examples also include a trailing edge flap region, which may itself include a first flap portion and a second flap portion. When mounted to a rotating hub member fan, blades with elliptical curvatures may provide air movement at significant efficiencies.
REFERENCES:
patent: 1938799 (1933-12-01), Bourne
patent: 2157999 (1939-05-01), Charavay
patent: 2592471 (1952-04-01), Sawyer
patent: 4968216 (1990-11-01), Anderson et al.
patent: 5328330 (1994-07-01), Monroe
patent: 5492448 (1996-02-01), Perry et al.
patent: 5564901 (1996-10-01), Moore
patent: 5725355 (1998-03-01), Crall et al.
patent: 5823480 (1998-10-01), La Roche
patent: 6039541 (2000-03-01), Parker et al.
patent: 6161797 (2000-12-01), Kirk et al.
patent: 6244821 (2001-06-01), Boyd et al.
patent: 6565320 (2003-05-01), Surles et al.
patent: 6719533 (2004-04-01), Bird
patent: 6884034 (2005-04-01), Parker et al.
patent: 2003/0095864 (2003-05-01), Ivanovic
patent: 2006/0018751 (2006-01-01), Aynsley
patent: 2006/0018758 (2006-01-01), Aynsley
patent: 2284082 (1998-06-01), None
patent: 3819145 (1989-12-01), None
patent: 0 096 255 (1983-12-01), None
patent: 100134 (1917-03-01), None
patent: 2050530 (1981-01-01), None
patent: 03206394 (1991-09-01), None
patent: 2002021777 (2002-01-01), None
JP 03-206394 A Machine Translation. Schreiber Translations, Inc. May 2011.
International Search Report dated Nov. 3, 2009 for Application No. PCT/US08/73670.
Written Opinion dated Nov. 3, 2008 for Application No. PCT/US08/73670.
Fairbank et al.; A Large Paddle Fan for Livestock Cooling; Jun. 1989; Canadian Society of Agricultural Engineering.
Author Unknown; Dairy Notes; May 1999; University of California Cooperative Extension.
Author Unknown; A Fan for All Seasons; Dec. 1999; Bell & Howell Information and Learning, American Society of Mechanical Engineers; Mechanical Engineering vol. 121, No. 12, pp. 58-60.
Author Unknown; Technical Guide: Commercial Industrial & Special Application Ceiling Fans; publisher and date unknown.
Author Unknown; Airfoil Design: HVLS, dated Dec. 9, 2002.
Jain et al.; Experimental Investigation of the Flow Field of a Ceiling Fan; Jul. 2004; ASME Heat Transfer/Fluids Engineering Summer Conference; Paper No. HT-FED-2004-56226.
Screenshots from www.b737.org.uk, relating to winglets, printed May 2004.
Screenshots from oea.larc.nasa.gov, relating to winglets, printed May 2004.
Screenshots from Penn State Engineering website, relating to winglets, printed May 2004.
International Search Report, dated Aug. 19, 2005 for PCT Application No. PCT/US05/02703.
Written Opinion, dated Aug. 19, 2005 for PCT Application No. PCT/US05/02703.
EPO Search Report, dated Aug. 21, 2006 for EP 05250653.2.
EPO Search Report, dated Aug. 22, 2006 for EP 05250654.0.
Office Action dated Jan. 23, 2007 for U.S. Appl. No. 11/046,341, filed Jan. 28, 2005.
Office Action dated Jan. 25, 2007 for U.S. Appl. No. 11/046,593, filed Jan. 28, 2005.
Office Action dated May 14, 2007 for U.S. Appl. No. 11/046,593, filed Jan. 28, 2005.
EPO Search Report, dated Jul. 1, 2008, for EP 05 250 632.2, pp. 1-6.
EPO Search Report, dated Jul. 1, 2008, for EP 05 250 654.0, pp. 1-6.
Delta T Corporation
Edgar Richard
Frost Brown Todd LLC
LandOfFree
Fan blades 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 blades, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan blades will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4259934