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:
Apr. 12, 2022
Filed:
Oct. 28, 2019
Honeywell International Inc., Morris Plains, NJ (US);
Donald Mittendorf, Apache Junction, AZ (US);
Krista Amato, Tempe, AZ (US);
Nicole Conklin, Phoenix, AZ (US);
Brent Ludwig, Mesa, AZ (US);
Mark Morris, Phoenix, AZ (US);
Ryon Stanley, Gilbert, AZ (US);
Donald Tilman, Fountain Hills, AZ (US);
Heemann Yun, Phoenix, AZ (US);
HONEYWELL INTERNATIONAL INC., Charlotte, NC (US);
Abstract
A turbomachine includes a shroud and a rotor, which includes first and second blades. A first blade tip and a second blade tip respectively include a base and a first layer. The second blade tip also includes an abrasive second layer layered over the respective first layer. The first layer has a lower material hardness than the shroud. The second layer has a lower thermal stability than the shroud and the first layer. The rotor performs a grind operation and, subsequently, a post-grind operation. The second layer, in the grind operation, contacts and removes material from the shroud, and wears away, thereby revealing the first layer of the second blade tip for the post-grind operation. The first layer of the first blade tip is spaced apart with at least some radial clearance from the shroud in the grind and post-grind operations.