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Class Information
Number: 411/421
Name: Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener > Externally threaded fastener element, e.g., bolt, screw, etc. > Thread or shank structure > Circumferentially interrupted thread > By longitudinal slot > Inclined slot > Helically oriented
Description: Subject matter wherein the groove slot traces a spiral path about the fastening means.

Patents under this class:

Patent Number Title Of Patent Date Issued
8109706 Composite fastener, belly nut, tie system and/or method for reducing heat transfer through a building envelope Feb. 7, 2012
7832971 Threaded element Nov. 16, 2010
7654785 Higher fastening screw Feb. 2, 2010
6789991 Screw Sep. 14, 2004
6659699 Lockbolt for forming a mechanically secured and sealant sealed connection between components Dec. 9, 2003
5882161 Self-drilling and thread-forming screw having a flow-forming section Mar. 16, 1999
5759003 Combined screw and clearance drill Jun. 2, 1998
5725581 Anchoring element supporting prostheses or a joint mechanism for a reconstructed joint Mar. 10, 1998
5702443 Anchoring element for implantation in tissue, for holding prostheses, artificial joint components or the like Dec. 30, 1997
5702445 Anchoring element for implantation in tissue, for holding prosthesis, artificial joint components or the like Dec. 30, 1997
5395195 Thread-forming screw with tri-roundular, tapered end Mar. 7, 1995
5242253 Thread-forming screw Sep. 7, 1993
5234291 Roof bolts Aug. 10, 1993
5110245 Thread forming screw May. 5, 1992
5061132 Self-locking fastener Oct. 29, 1991
4856952 Deformed bar for adhesion and applying tension Aug. 15, 1989
4815909 Wood screw and method for making same Mar. 28, 1989
4718802 Sawtooth-profile nail Jan. 12, 1988
4697969 Wood screw Oct. 6, 1987
4583898 Drill screw and cutters for making same Apr. 22, 1986
4479748 Screw-and-nut unit or screw joint Oct. 30, 1984
4395173 Drill screw with protective burrs Jul. 26, 1983

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