Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Head driving structure
Reexamination Certificate
2007-11-13
2007-11-13
Mitchell, Katherine (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Head driving structure
C411S407000, C411S408000, C411S403000, C411S919000
Reexamination Certificate
active
10825633
ABSTRACT:
Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a “stick fit” engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.
REFERENCES:
patent: 2066484 (1937-01-01), Phillips
patent: 2285460 (1942-06-01), Purtell
patent: RE24870 (1960-09-01), Smith et al.
patent: 3170364 (1965-02-01), Johnson et al.
patent: 3237506 (1966-03-01), Muenchinger
patent: 3331274 (1967-07-01), Walton
patent: 3673912 (1972-07-01), Herr
patent: 4171662 (1979-10-01), Simone et al.
patent: 5279190 (1994-01-01), Goss et al.
patent: 5291811 (1994-03-01), Goss
patent: 5598753 (1997-02-01), Lee
patent: 5931706 (1999-08-01), Bassi
patent: 5957645 (1999-09-01), Stacy
patent: 6234914 (2001-05-01), Stacy
patent: 6361258 (2002-03-01), Heesch
patent: 6367358 (2002-04-01), Stacy
patent: 6575061 (2003-06-01), Wagner
patent: 6655888 (2003-12-01), Schultz
patent: 6698315 (2004-03-01), Wright
patent: 6698316 (2004-03-01), Wright
patent: 6725746 (2004-04-01), Wright
patent: 6843729 (2005-01-01), Hughes
patent: 6904833 (2005-06-01), Wright
patent: 7077038 (2006-07-01), Toyooka et al.
patent: 2005/0232722 (2005-10-01), Dilling
patent: 2149872 (1985-06-01), None
http://www.google.com/search?hl=en&Ir=&q=define%3Ainterference+fit.
http://dictionary.reference.com/search?q=interference.
Mitchell Katherine
Perman & Green LLP
Phillips Screw Company
LandOfFree
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