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Class Information
Number: 470/63
Name: Threaded, headed fastener, or washer making: process and apparatus > Apparatus for making externally threaded fastener or article, e.g., screw, bolt, etc. > Screw fastener making > Having head nicking > Punch and die type
Description: Subject matter wherein the component comprises an first element, i.e., a punch, cooperating with a second element, i.e., a die, whereby the notch, cut or indentation is produced a blow or thrust applied to the punch as the fastener is held between the punch and die.

Patents under this class:

Patent Number Title Of Patent Date Issued
7618327 Fastener with friction engageable surface Nov. 17, 2009
7404769 Spiral drive fastener with engagement ramp Jul. 29, 2008
6852037 Fastener having recess useable with multiple drivers and method of manufacture Feb. 8, 2005
6786827 Punch and manufacturing method for recessed head fastener Sep. 7, 2004
6755748 Screw head formation Jun. 29, 2004
6648766 Cool-wrought pressing forming method for slotted headless screws Nov. 18, 2003
6406376 Compound screw drive recesses mold Jun. 18, 2002
6390929 Method for making drive sockets May. 21, 2002
6234914 Punch for forming threaded fasteners with spiral drive May. 22, 2001
5904623 Apparatus for forming a slot in a semi-product of a bolt prior to thread formation May. 18, 1999
5203742 Punch for making such screw heads with slant rib Apr. 20, 1993
4670927 Method and apparatus for forming the head of a high torque fastener Jun. 9, 1987
4589154 Method and apparatus for forming the head of a high torque fastener May. 20, 1986
4160300 Hammer for forming an undercut fastener driving slot Jul. 10, 1979
4151621 Tools for punching fastener heads May. 1, 1979
4126908 Threaded fastener recess forming punch Nov. 28, 1978
4033003 Head forming method Jul. 5, 1977
4028918 Assembly for applying lubricant to the working area of a punching device Jun. 14, 1977
3972083 Punch for making recessed screw Aug. 3, 1976
3945071 Apparatus for cold forming recesses in the heads of screw fasteners Mar. 23, 1976

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