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. 29, 2026
Filed:
Dec. 21, 2021
Raytheon Technologies Corporation, Farmington, CT (US);
Zhigang Wang, South Windsor, CT (US);
John D. Riehl, Hebron, CT (US);
Andrew J. Lazur, Laguna Beach, CA (US);
Robin H. Fernandez, East Haddam, CT (US);
Paul F. Croteau, Columbia, CT (US);
Gajawalli V. Srinivasan, South Windsor, CT (US);
Ashley A. Smith, Royal Palm Beach, FL (US);
RTX CORPORATION, Farmington, CT (US);
Abstract
A method of machining cooling holes includes providing a workpiece in which a cooling hole is to be formed. The cooling hole, once formed, defines distinct first and second sections. The workpiece is secured in a fixture that is mounted in a first machine. In the first machine, a laser is used to drill a through-hole in a wall of the workpiece. The through-hole is spatially common to the first and second sections of the cooling hole. After drilling the through-hole, the fixture with the workpiece secured therein is removed from the first machine and mounted in a second machine. In the second machine, ultrasonic machining is used to expand a portion of the through-hole to form the second section. An abrasive slurry used in the process is drained through the through-hole during the ultrasonic machining.