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:
Feb. 04, 2025
Filed:
Nov. 18, 2022
Collins Engine Nozzles, Inc., Des Moines, IA (US);
Thomas J. Ocken, Des Moines, IA (US);
Murtuza Lokhandwalla, South Windsor, CT (US);
Mark J. Kelly, Longmeadow, MA (US);
Andrew M. Caldecutt, Vernon, CT (US);
Jerry Logsdon, Van Meter, IA (US);
Nathan DeVore, Winterset, IA (US);
Joseph Samo, Johnston, IA (US);
Collins Engine Nozzles, Inc., Des Moines, IA (US);
Abstract
A method of manufacturing a last chance screen for an aircraft engine includes forming an array of holes through a metal sheet with a wire electrode using electrical discharge machining. The array of holes comprises a plurality of holes. Each hole of the plurality of holes comprises a first end and a second end and is surrounded by a wall section such that the last chance screen is defined by the plurality of holes and the plurality of wall sections. The first and second end of each hole are widened by either applying a flow of an abrasive flow medium to the array of holes in two directions or using a conical sinker electrode on either side of the metal sheet. Shaping the first and second end of each hole results in an airfoil-shaped cross-section of each wall section.