Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Externally threaded fastener element – e.g. – bolt – screw – etc. – Multipart
Patent
1996-04-01
1997-06-03
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Externally threaded fastener element, e.g., bolt, screw, etc.
Multipart
411396, 335302, F16B 3502, F16B 3506
Patent
active
056347553
ABSTRACT:
A magnetic drain bolt comprising: a bolt body and a magnet, the bolt body comprises a male-threaded member and a head member, the male-threaded member has an axial bore formed at a bottom end thereof for receiving the magnet, the male-threaded member further has a substantially circular lip extending axially inward at a bottom edge of the axial bore; the magnet consists of a cylindrical base and a cylindrical projecting extremity, the cylindrical base is sized to fit within the axial bore and has a diameter slightly larger than an inner diameter of the circular lip, the cylindrical projecting extremity extends axially from the cylindrical base and has a diameter slightly smaller than an inner diameter of the circular lip and thereby defines an indented circular shoulder along a bottom edge of the cylindrical base and along a top edge of the cylindrical projecting extremity, wherein the cylindrical base is fitted within the axial bore and the circular lip extends over the indented circular shoulder against the top edge of the circular projecting extremity thereby securing the cylindrical base within the axial bore with the circular projecting extremity extending axially beyond the bottom end of the male-threaded member.
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Breh Donald J.
Buckman Thomas W.
Illinois Tool Works Inc.
O'Brien John P.
Wilson Neill R.
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