Land vehicles: bodies and tops – Bodies – With distinct wind deflector
Reexamination Certificate
2008-06-26
2010-02-23
Dayoan, Glenn (Department: 3612)
Land vehicles: bodies and tops
Bodies
With distinct wind deflector
C296S180200
Reexamination Certificate
active
07665797
ABSTRACT:
An optimized aerodynamic drag and vibration reducing geometry is described for round cylindrical tubing or pipe exposed to a flow stream at right angles to its direction of travel. The base drag reduction of the tube or pipe is maximized by providing a shaped fairing which intersects the cylindrical tube at the point of would-be flow separation and by means of a turbulator strip along the leading edge of the fairing geometry at the juncture, ensures a smooth flow transition to avoid asymmetric vortices and large negative pressures from forming in the remainder of the wake flow. A direct application would be to improve fuel economy of a semi-tractor trailer vehicle with large exposed vertical exhaust pipes operating at freeway speeds. By reducing the wake turbulence behind the exhaust pipes, a secondary reduction of trailer fore body pressure drag will ensue. By lowering the wake turbulence, ambient noise levels into the tractor cab are reduced, as are reduced vibrations transmitted directly into the cab from the pipe mount.
REFERENCES:
patent: 4021069 (1977-05-01), Hersh
patent: 4027836 (1977-06-01), Seibel
patent: 4143731 (1979-03-01), Haustein
patent: 4227651 (1980-10-01), Abe
patent: 4245862 (1981-01-01), Buckley, Jr.
patent: 4257640 (1981-03-01), Wiley
patent: 4465154 (1984-08-01), Hinderks
patent: 4665691 (1987-05-01), Eller
patent: 4671474 (1987-06-01), Haslund
patent: 4706910 (1987-11-01), Walsh et al.
patent: 4822067 (1989-04-01), Matsuo et al.
patent: 4904015 (1990-02-01), Haines
patent: 5114099 (1992-05-01), Gao
patent: 5190342 (1993-03-01), Marlowe et al.
patent: 5374013 (1994-12-01), Bassett et al.
patent: 5595205 (1997-01-01), Sirovich et al.
patent: 5658038 (1997-08-01), Griffin
patent: 5924763 (1999-07-01), Daniels
patent: 6092861 (2000-07-01), Whelan
patent: 6186571 (2001-02-01), Burke
patent: 6412853 (2002-07-01), Richardson
patent: 6837536 (2005-01-01), Schwartz
patent: 6883848 (2005-04-01), Iverson et al.
patent: 7051524 (2006-05-01), Kraft
patent: 7216923 (2007-05-01), Wong et al.
Blankenship Gregory
Dayoan Glenn
LandOfFree
Braced fairing for drag and vibration reduction of round tubing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Braced fairing for drag and vibration reduction of round tubing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Braced fairing for drag and vibration reduction of round tubing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4201027