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:
Jun. 02, 1992
Filed:
May. 24, 1990
David B Chaney, Powell, OH (US);
The W. B. Marvin Manufacturing Company, Urbana, OH (US);
Abstract
The noise of operation of a fan assembly having a fan blade which rotates in a predetermined direction upon operation of the fan assembly may be reduced by the use of an intake grill including an inner central portion, ring elements disposed in mutually spaced, concentric relation to one another about the central portion, and spirallly-extending support elements connected to the central portion and to the ring elements. The intake grill further includes mutually circumferentially-spaced finger elements connected to and projecting away from a grill mounting surface which are also connected to the outermost ring element and thereby support the interconnected ring elements, central portion, and support elements in spaced relation to the grill mounting surface. Stiffening elements may be disposed between adjacent support elements and connected to selected adajcent ones of the ring elements.