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:
Apr. 19, 2011
Filed:
Mar. 19, 2007
Applicants:
Angraj Kumar Seewraj, Welwyn, GB;
Terence Gilbert, Welwyn Garden, GB;
Inventors:
Angraj Kumar Seewraj, Welwyn, GB;
Terence Gilbert, Welwyn Garden, GB;
Assignee:
Avdel UK Limited, Hertfordshire, GB;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B21J 15/20 (2006.01); B21J 15/34 (2006.01);
U.S. Cl.
CPC ...
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.