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:
Dec. 20, 1977
Filed:
Jan. 28, 1976
John F O'Connor, Torrington, CT (US);
Torin Corporation, Torrington, CT (US);
Abstract
An axial flow impeller for low pressure ratio applications in the range 1.03 and below and comprising a hub carrying a plurality of similar circumaxially arranged air moving blades. Each blade has a root portion attached to the hub and a radially outwardly disposed tip portion. The camber of each blade decreases from root to tip with 0.1203 root camber and .023 tip camber for a ratio of 5.23 to 1. Pitch also decreases from root to tip with a root pitch of 46.degree. and a tip pitch of 27.4.degree. for a ratio of 1.68 to 1. Chord increases from root to tip with a 1.528 inch root chord and a 2.59 inch tip chord for a 1.7 to 1 ratio. The blade camber and chord both change gradually at the blade inner and mid portions with a 35% camber decrease in the outermost 20% of blade span, and with substantially all of the chord increase occurring beyond the blade midpoint.