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:
Oct. 17, 2006
Filed:
Sep. 13, 2002
Katsuhiko Sugitani, Kariya, JP;
Katsuhiko Sugitani, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A stator having an armature winding and a rotor having a field winding are contained in an alternator housing. A cooling fan is connected to at least one axial end of the rotor, and a plurality of windows are formed in an axial end wall of the housing to face the cooling fan. A shroud surface facing the cooling fan is formed at a radial outside of each window. The opening of the window is so made that it gradually decreases along a rotational direction of the cooling fan, while the shroud surface area gradually increases along the same direction. In this manner, pressure changes in a space between the fan blades and the fan shroud are smoothened, and thereby noises generated by the cooling fan are effectively reduced.