Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Concave surface
Reexamination Certificate
2005-05-03
2009-12-01
Edgar, Richard (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Concave surface
C416S24400R
Reexamination Certificate
active
07625186
ABSTRACT:
Conventional large area fans generally create a cylinder of air having a diameter that is essentially equal to the diameter of the fan. Larger diameter fans require heavier-duty motors and gearboxes to drive the longer fan blades and are heavier, and thus are more difficult to mount, require heavier-duty mounting fixtures, and are more likely to fall. One large area fan according to this invention forms a cone of air. Some fan blades according to this invention have a relatively straight leading edge portion attached to the fan and a generally curved trailing portion extending downwardly from the relatively straight leading edge portion that interacts with the air to create a conical or cone-shaped flow of air from the fan. Other fan blades have a curved segment and are attached to the fan at theirs leading edges. In some such fan blades, one end is offset from the other end.
REFERENCES:
patent: 578360 (1897-03-01), Phillips et al.
patent: 871729 (1907-11-01), McChord, Jr.
patent: 1055947 (1913-03-01), Schwartzberg
patent: 1150241 (1915-08-01), Banzhof
patent: 1473066 (1923-11-01), Wells
patent: 1501201 (1924-07-01), Cates
patent: 1820448 (1931-08-01), Davy
patent: 2243189 (1941-05-01), Brannan
patent: 3625635 (1971-12-01), Stonack
patent: 3733147 (1973-05-01), Felker
patent: 4364712 (1982-12-01), Charles
patent: 4618313 (1986-10-01), Mosiewicz
patent: 4662823 (1987-05-01), Cooke
patent: 4892460 (1990-01-01), Volk
patent: 5007811 (1991-04-01), Hopkins
patent: 6244821 (2001-06-01), Boyd et al.
patent: 6589016 (2003-07-01), Boyd et al.
patent: 6884034 (2005-04-01), Parker et al.
patent: 6991431 (2006-01-01), Ching Wen
patent: 2002/0001521 (2002-01-01), Boyd et al.
patent: 2004/0009071 (2004-01-01), Bird
patent: 2004/0084544 (2004-05-01), Boyd et al.
Edgar Richard
Lathrop & Clark LLP
LandOfFree
Large area fan and fan blades usable for large spaces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Large area fan and fan blades usable for large spaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large area fan and fan blades usable for large spaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4114628