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:
Jul. 14, 1987
Filed:
Mar. 21, 1986
John H Vontell, Manchester, CT (US);
Roscoe A Pike, Granby, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
Techniques are described for the formation of an abrasive surface layer on an article. The surface layer is characterized by a single layer of particles which are evenly spaced apart, in a high density arrangement, within a metallic matrix. In the deposition of the particles on the article, a vacuum is drawn through a perforated plate, wherein the location of each perforation corresponds to the desired location of one particle on the article surface. The vacuum holds one particle over each perforation in the plate, then the plate is positioned over the article and the vacuum level adjusted so that the particles fall onto the article. The matrix is then deposited by plasma arc spraying a superalloy powder. The invention is particularly suited to the formation of an abrasive layer on the tip surface of a blade used in a gas turbine engine.