Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7404769 | Spiral drive fastener with engagement ramp The fastener of this application is designed to facilitate the insertion of rotating power driven tools into the fastener recess. The recess of this fastener generally uses spirally configured driving surfaces and is formed in a counterbore in the upper surface of t... | 07/29/2008 |
| 7293949 | Spiral drive fastener with friction engageable surface 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 surf... | 11/13/2007 |
| 7156598 | Waffle stud for insert molded plastic members A fastener is configured for use in the manufacture of molded plastic components that will be subsequently attached to other components by the fastener. The low profile head portion of the fastener has a rounded contoured and convoluted top surface to facilitate the... | 01/02/2007 |
| 7114902 | Self-tapping bush-shaped screwed insert A thread-cutting screwed dowel has an essentially cylindrical, sleevelike dowel body with an axial bore and with a load engagement device disposed in the interior of the dowel body, for example with a female thread. On its outer face, the dowel body is equipped with... | 10/03/2006 |
| 6852037 | Fastener having recess useable with multiple drivers and method of manufacture A fastener is described having a head formed with a recess which accommodates a square head driver, symmetrical drivers, such as PHILLIPS™ style drivers, asymmetrical style cross head drivers, such as POZIDRIV® style drivers, and combination square and cross driv... | 02/08/2005 |
| 6786827 | Punch and manufacturing method for recessed head fastener Recessed head fasteners are provided with a configuration by which the force applied by the blades of the driver to the recessed wings is applied at the radially outer regions of the wings. The wings of the fastener recess may be provided with torque pads at the out... | 09/07/2004 |
| 6755748 | Screw head formation The screw has two or three non-circular super-imposed recesses. The depth of each recess is less than 1.2 mm and there is a less than 1° of draw in each recess. The screw head recess is formed using a punch (10) in a cold-heading process. The punch is formed... | 06/29/2004 |
| 6648766 | Cool-wrought pressing forming method for slotted headless screws A cool-wrought pressing forming method for slotted headless screws includes five steps of using five different molds and five pressing heads for processing a unit of screw material cut from linear material for forming an unfinished screw with a slot in an... | 11/18/2003 |
| 6406376 | Compound screw drive recesses mold A screw drive recess mold for forming screw drive recesses which has a body and a mold base. The mold base consists of four symmetrical fan-shaped protrusions and a center square protrusion. Four elongate rectangular hollow spaces are located in each of t... | 06/18/2002 |
| 6390929 | Method for making drive sockets A method of making a recess in a drive socket and the like includes forming a groove to extend along a face of an elongated drive opening in a metal workpiece from one end of its drive opening, moving material from the surface of the groove to increase it... | 05/21/2002 |
| 6234914 | Punch for forming threaded fasteners with spiral drive A spiral drive system for threaded fasteners includes driver-engageable surfaces on the head end of the fastener in which at least some of the driver-engageable surfaces are defined by a spiral segment configured to maximize torque transmission while spre... | 05/22/2001 |
| 5904623 | Apparatus for forming a slot in a semi-product of a bolt prior to thread formation An apparatus for forming a slot in a semi-product of a bolt prior to thread formation includes a punch and a die mechanism. The die mechanism includes a tubular member, and an elongated die member formed integrally with a slot-forming plate which is locat... | 05/18/1999 |
| 5203742 | Punch for making such screw heads with slant rib A punch is provided for making a screw head with ribs on some of the driver surfaces. The punch includes a slanted groove for providing a rib which is slanted from the screw axis by a small angle between 1° and 10°.... | 04/20/1993 |
| 4670927 | Method and apparatus for forming the head of a high torque fastener An improved high torque fastener is provided of the type having a screw head with a generally bow-tie shaped driving slot formed with undercut side walls and an arcuately concave bottom wall for reception of an arcuately convex blade of a driving tool for... | 06/09/1987 |
| 4589154 | Method and apparatus for forming the head of a high torque fastener An improved high torque fastener is provided of the type having a screw head with a generally bow-tie shaped driving slot formed with undercut side walls and an arcuately concave bottom wall for reception of an arcuately convex blade of a driving tool for... | 05/20/1986 |
| 4160300 | Hammer for forming an undercut fastener driving slot An improved hammer used in the first step of a two-step method for forming an undercut fastener driving slot in the head of a fastener, such as a screw or bolt, that results in an arcuate, recessed high-torque driving slot with undercut slot sidewalls whe... | 07/10/1979 |
| 4151621 | Tools for punching fastener heads A punch for forming a screw head is provided with grooves which will form projections on selected of the driver-engageable surfaces of the head. The projections are arranged to interlock with surfaces and edges of the driver to reduce the tendency for the... | 05/01/1979 |
| 4126908 | Threaded fastener recess forming punch A screw having a head and a threaded shank and, in the head, a cruciform shaped recess comprising a central cavity and four grooves radiating from the central cavity at 90° angular spacings, the bases of the grooves lying on a conical (or pyramidal) surf... | 11/28/1978 |
| 4033003 | Head forming method A method of providing an undercut "bowtie" slot in the head of a fastener such as a screw or bolt, and the resulting interim and final fastener products. The method consists of only two heading steps, starting with either a preform or a simple blank. In t... | 07/05/1977 |
| 4028918 | Assembly for applying lubricant to the working area of a punching device Device for applying lubricant to the workpiece and/or working surface of the punch of a multistage forging press. Channels are provided between the stepped holding pin of the punch and the wall of the stepped bore in which the holding pin reciprocates. Th... | 06/14/1977 |
| 3972083 | Punch for making recessed screw A tapered punch for producing a recessed screw, the punch having an axially extending recess forming portion of symmetrical cross section and presenting in cross section 8 symmetrically disposed corners in 45° spaced relation with any 4 alternate corners... | 08/03/1976 |
| 3945071 | Apparatus for cold forming recesses in the heads of screw fasteners A recess is formed in a screw head by a cold forming technique employing a two piece punch which includes an outer member having an axial bore formed therethrough which receives and carries an inner, concentric punch pin for movement within the bore. The ... | 03/23/1976 |
