Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Terence Gilbert0
Angraj Kumar Seewraj0
Date of Patent
April 19, 2011
Patent Application Number
12160047
Date Filed
March 19, 2007
Patent Primary Examiner
Patent abstract
A breakstem rivet placing tool conventionally includes a flow restrictions for hydraulic fluid used to drive the tool in a stem pulling direction. This serves to prevent recoil of the tool due to rapid acceleration of an internal piston when the stem of the breakstem rivet breaks. Prior art flow restrictions create a jet of high velocity hydraulic fluid into the tool which may damage components by erosion. A revised fluid damper valve deflects and/or diffuses the fluid flow to avoid damage by erosion.
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