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. 26, 1995
Filed:
Jun. 13, 1994
Yehia M Amr, Manlius, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
An inlet orifice structure and impeller assembly for a centrifugal flow fan. The inlet orifice has an elliptical cross section in a plane passing through the axis of rotation of the fan. The impeller is shrouded and also has a similarly elliptical cross section. The impeller is sized so that, when assembled together, the shroud overlaps and rotates around the stationary inlet orifice. In a preferred embodiment, there are 13 impeller blades nonuniformly spaced around a hub plate. A particular blade spacing is disclosed and claimed. The inner surface of the hub plate is arcuately curved to guide the air flow through the fan from its entering axial direction to its radial exiting direction. The contour of the hub plate allows for the fan drive motor to be partially recessed into the plate.