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:
Apr. 30, 1996
Filed:
Jul. 27, 1994
Takahiro Tokunaga, Kosai, JP;
Yukio Uemura, Kariya, JP;
Hideo Asano, Gifu, JP;
Hikaru Sugi, Nagoya, JP;
Teruhiko Kameoka, Okazaki, JP;
Yasushi Kondo, Chiryu, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A multi-blade fan having a fan assembly including a bottom plate and a plurality of circumferentially spaced blades and a casing for the fan assembly therein having an outlet duct extending therefrom for discharge of the air flows. The fan assembly includes an annular shroud connected to the axial ends of the blades remote from the bottom plate. The casing includes a bottom wall for rotatably connecting the fan assembly, a top wall for defining an air inlet for axially introducing the air into the casing, and a tubular wall connecting the bottom and top walls. The top wall of the casing adjacent to the inlet opening forms an annular projection having a bell cross sectional shape opened inwardly so that an axial end of the shroud extends thereto. The bell cross section portion radially extends to a portion that is inclined downwardly in the outward direction, which faces the shroud so that a small gap extending radially is created. The top wall or bottom wall of the casing at its radially outer portion can be downwardly inclined. The tubular wall of the casing can also be inclined so that the bottom end of the tubular wall is flared radially outward from its center.