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. 10, 2001
Filed:
Apr. 27, 1998
D. Lee Hill, Olathe, KS (US);
Hamid Massali, Leawood, KS (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
An air circulation fan has front and rear fan guard members, a motor, a propeller, and a removable shroud covering an outer peripheral portion of the front fan guard member. The removable shroud forms an annular ring having a central, air discharge opening. In one embodiment, the removable shroud is formed from an integral piece of elastomeric material. In another embodiment, the shroud is formed from a plurality of identical plastic shroud portions. Each shroud portion is formed of plastic and covers a section of the outer peripheral portion of the front fan guard member. Each shroud portion has clips for clipping the portion to the front fan guard member. In one embodiment, fan blades, conventionally used on box-type fans, having an inner, leading cut-away notch and a trailing flared portion. The presence of the shroud and such blades make the fan useful in agricultural settings, such as in poultry barns. In operation of the fan, the shroud greatly reduces the noise generated by the fan.