US Patent 7370537 Ceramic ball bearing acoustic test method

Patent 7370537 was granted and assigned to The Aerospace Corporation on May, 2008 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

The Aerospace Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73705370

Patent Inventor Names

Michael J. O'Brien0

Benjamin A. Nelson0

Michael R. Hilton0

Date of Patent

May 13, 2008

Patent Application Number

109891800

Date Filed

November 15, 2004

Patent Citations Received

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US Patent 11835491 Device and method for testing bearing capacity of grouped pillars in inclined goaf under coupled biaxial static and disturbance stresses

Patent Primary Examiner

Hezron Williams

Patent abstract

An acoustical mechanical test method prescribes compressing brittle balls in spherical conforming opposing platens producing equatorial bulging, tensile stresses, and resulting in crack or flaw growth with emissions of acoustical sounds for direct identification of brittle balls having a flaw exceeding a maximum allowable size, such as flaws in silicon-nitride balls used in hybrid bearings as well as conventional steel ball bearings.