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:
Nov. 03, 2015
Filed:
Dec. 19, 2013
Varian Semiconductor Equipment Associates, Inc., Gloucester, MA (US);
Michael A. Schrameyer, Beverly, MA (US);
Jeffrey E. Krampert, Topsfield, MA (US);
Varian Semiconductor Equipment Associates, Inc, Gloucester, MA (US);
Abstract
A ceramic fastener includes a ceramic body portion, and a containment layer disposed around the ceramic body portion. The containment layer retains pieces of the ceramic body portion when the ceramic body portion is subjected to a torque sufficient to fracture the ceramic body portion. The fastener can be a nut, and the containment layer can be disposed around one or more of the top, bottom and side surfaces of the nut. The containment layer can be a metal shroud having a thickness from 0.01 to 0.125 inches. The ceramic body portion can be alumina or zirconia. A thread insert may be disposed within a fastener bore of the ceramic body portion.