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:
Dec. 29, 2015
Filed:
Mar. 31, 2011
Allen L. Kelly, Dallas, TX (US);
Christopher K. Solecki, Allen, TX (US);
Kevin M. Chapla, Melissa, TX (US);
William C. Strauss, Westford, MA (US);
Allen L. Kelly, Dallas, TX (US);
Christopher K. Solecki, Allen, TX (US);
Kevin M. Chapla, Melissa, TX (US);
William C. Strauss, Westford, MA (US);
RAYTHEON COMPANY, Waltham, MA (US);
Abstract
An apparatus for producing a layer of vitreous silica adjacent at least a portion of an inner surface of a fused silica body is described, comprising a heat source disposed to apply sufficient heat to at least a portion of the inner surface to cause a layer of said at least a portion of the inner surface to vitrify. In certain embodiments the heat source is configured to heat at one time a relatively small area of the inner surface, and the apparatus comprises a positioning mechanism for moving the heat source with respect to the inner surface. In certain embodiments the heat source is a hydrogen-oxygen surface-mix fueled torch that is moved helically with respect to the inner surface of the body under the control of a programmed CNC motion control system.