The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2002
Filed:
Feb. 07, 2001
Vasanthi Iyer, Wilmington, DE (US);
Richard Down, Jr., Pine Hill, NJ (US);
George Hall, Philadelphia, PA (US);
Penn Ventilation, Inc., North Wales, PA (US);
Abstract
A fan shroud for an axial flow fan comprises a generally annular main body having an inlet end, an outlet end, and an inner surface defining a fluid flow path between the inlet and outlet ends. The inner surface includes first and second conical sections that converge toward the outlet end and a diverging section that diverges toward the outlet end. The second conical section is located between the first conical section and the diverging section. With this arrangement, turbulent fluid flow through the fan shroud between the inlet end and outlet end is minimized. Preferably, a first converging angle of the first conical section with respect to a plane transverse to the direction of fluid flow at the inlet end is less than a second converging angle of the second conical section with respect to the plane.