Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Impact driven fastener – e.g. – nail – spike – tack – etc. – Head having central recess
Reexamination Certificate
2005-03-29
2005-03-29
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Impact driven fastener, e.g., nail, spike, tack, etc.
Head having central recess
C411S451100, C411S922000, C411S923000, C411S005000
Reexamination Certificate
active
06872042
ABSTRACT:
A novel fastener comprises a head having a recess for receiving a rotary driver, a shank having knurls defined by generally helical grooves and intersecting generally annular grooves, wherein a plurality of the knurls include a lateral cutting edge, and a generally pointed tip. Another novel fastener comprises a head having a recess for receiving a rotary driver, a shank having a predetermined diameter small enough so that the head will break away from said shank upon application of a predetermined torque, and said shank having knurls defined by generally helical grooves and intersecting generally annular grooves.
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Levey Kenneth R.
Panasik Cheryl L.
Speer David B.
Breh Donald J.
Croll Mark W.
Illinois Tool Works Inc.
Saether Flemming
Soltis Lisa M.
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