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| Number | Title | Issue Date |
| 7311026 | Strip resistant screw head and screwdriver tip in combination A screw head and screwdriver for use in combination are provided to reduce the occurrence of stripping a screw head during tightening or removing the screw. The head slot employs slot walls that indent in some portion of the wall, the indent portion forming a ledge ... | 12/25/2007 |
| 7299725 | Torque fastening devices and apparatuses Fastening devices and apparatuses for providing an appropriate amount of torque in a fastening system. Particularly, fastening devices and apparatuses configured to inform a user when an appropriate amount of torque as been used when fastening the fastening device t... | 11/27/2007 |
| 7165482 | Fastener and driving tool with retaining blade A combination fastener driver and fastener, the fastener driver including a generally hourglass-shaped tip which flares from the shank to the tip and the fastener includes a generally hourglass-shaped slot in the fastener head with under cut side walls. The flared w... | 01/23/2007 |
| 6526851 | Undercut screw and matching bit A screw has a head portion and a threaded portion. The head portion has an undercut slot extending across it. The slot has a flat floor and sloping sides and the width of the floor of the slot is greater than the width at the top opening of the slot. A ma... | 03/04/2003 |
| 5697743 | Tamper proof threaded fastener A tamper proof threaded fastener construction (10) comprising a conventional elongated threaded fastener body member (20) having an enlarged head member (30) provided with a contoured and tapered frangible member (40) which is used to drive the fastener c... | 12/16/1997 |
| 4832556 | Coupling apparatus A coupling which consists of first and second solid members. In one form a first coupling element has a recess therein and has a first boss disposed in the recess. The first boss and the recess each have a geometric axis. The axes of the recess and the fi... | 05/23/1989 |
| 4794995 | Orientable fluid nozzle for drill bits A nozzle for a drill bit comprises a nozzle body and a ring for securing the nozzle body in a threaded cavity of the drill bit. The nozzle body includes a fluid passage of the orientable type. The ring comprises an externally threaded sleeve and a cap bon... | 01/03/1989 |
| 4339971 | Fastener and driving tool A driving tool and fastener, in the driving end of which is provided a nick or slot for insertion of the driving tool for driving the fastener, are provided which, because of their particular, respective cross-sectional configurations, can be interlocked ... | 07/20/1982 |
| 4311071 | Screw driver and screw head system A screw driver has a handle, shaft and blade with the bottom edge of the blade being flat and having flat sides which incline inwardly from the bottom edge. To turn the screw, the screw driver is placed with its bottom edge in the gap between protruding (... | 01/19/1982 |
| 4258606 | Screw A screw adapted to be driven by an ordinary straight-bladed screwdriver, the head of the screw having a cylindrical socket formed in the top surface of the head thereof coaxially with the screw shank adapted to receive the driver blade therein, the wall o... | 03/31/1981 |
| 4190091 | Screw, screwdriver and screw-holding attachment therefor A screwdriver has an undercut enlarged foot portion and an anti-shift pivot element of one-piece therewith. The screwdriver is longitudinally inserted into a screw such that the foot portion and the pivot element are respectively received with clearance i... | 02/26/1980 |
