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:
May. 14, 2002
Filed:
Mar. 13, 2001
Michael E. Slipper, Blackwood, NJ (US);
Yu-Tai Lee, McLean, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A high-pressure vane-axial fan assembly is provided. A rotor assembly has a plurality of rotor blades disposed circumferentially around and extending radially outward from a hub. Each rotor blade has an airfoil cross-section and is constructed to define a straight-ruled leading edge that extends outward from the hub. The rotor blade is rotated along its span relative to the straight-ruled leading edge. The plurality of rotor blades defines a solidity of greater than 1. A stator assembly has a plurality of stator vanes disposed circumferentially around and extending radially from the frame. There are a lesser number of stator vanes than rotor blades. The stator assembly is positioned adjacent the rotor assembly such that an axial gap is defined between the trailing edge of the rotor blades and the leading edge of the stator vanes. The axial gap increases with radial distance from the hub as defined by the shape of the trailing edge of the rotor blades and the shape of the leading edge of the stator vanes. The axial gap is a minimum of the rotor blade's axial chord length along a central portion thereof.