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:
Jan. 16, 2007
Filed:
May. 09, 2005
Philip John Dudt, Rockville, MD (US);
David R. Forrest, Gaithersburg, MD (US);
Jennifer P. Nguyen, Sterling, VA (US);
Philip John Dudt, Rockville, MD (US);
David R. Forrest, Gaithersburg, MD (US);
Jennifer P. Nguyen, Sterling, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
An axially elongated cylindrical tool has a protrusion at a lower end thereof which is inserted into a metallic work piece substrate under pressure during rotation of the tool and displacement thereof in one direction. Mixing of a matrix of metal and particles by the protrusion occurs within a stir zone underlying the substrate surface which is thereby treated by dispersion of the particles therein in response to rotation of the tool. Influx of the hard particles into the work piece substrate is effected during said mixing by the rotating tool.