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:
Sep. 27, 1983
Filed:
Dec. 30, 1980
Applicant:
Inventors:
Neil E Robb, Jackson, MI (US);
Thomas G Gorman, Hanover, MI (US);
Assignee:
Hayes-Albion Corp., Jackson, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
4151 / ; 123 4149 ; 277 57 ; 416228 ;
Abstract
An improved shrouded fan assembly (10, 10') is disclosed which forms a labyrinthian seal between a plurality of fan blades (20, 20') and an annular ring (16, 16') mounted to a non-rotating shroud (15, 15') without the use of a rotating annular shroud. The tip of at least one fan blade (20, 20') defines a slot (21, 21') adapted to receive the annular ring (16, 16') to form a labyrinthian seal therewith. The improvement increases fan efficiency by decreasing undesirable air flows in the shroud gap between the shroud (15, 15') and the tips of the fan blades (20, 20').