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| Number | Title | Issue Date |
| 5364212 | Fastening member having threads, particularly a screw and screwing tool A threaded fastening member includes an actuating end having a head. The head has a diameter projecting beyond a diameter of the thread of the fastening member and is coaxial with a thread axis. A centrally located recess is provided within the head for t... | 11/15/1994 |
| 5291811 | Back-side taper wedging drive system A driver assembly for driving fasteners into a workpiece comprises a multilobular fastener engaging portion for engagement in a complementary multilobular socket or recess on a fastener. Each lobe is bounded on opposite sides by a flute, and each lobe inc... | 03/08/1994 |
| 5287778 | Universal screw driver The subject apparatus is an improved screw driver adapted to have an expanding head to adapt to different screw head types and sizes, such screw driver device apparatus comprising a hollow handle member affixed concentrically to a hollow shaft, with the h... | 02/22/1994 |
| 5284075 | Screwing tool, particularly a screwdriver A screwing tool, particularly a screwdriver (1) or screwdriver bit, for polygonal socket screws (8), having flank sections (12) which are convex in circumferential direction; in order to optimize the transmission of force it is proposed that the flank sec... | 02/08/1994 |
| 5279190 | Elliptical lobed drive system There is disclosed a torque transmitting or coupling arrangement for a fastener drive system or the like, wherein the respective externally configured and internally configured components are provided with a series of mating, elliptically curved flutes an... | 01/18/1994 |
| 5259279 | Slot screwdriver A slot screwdriver with convex wide-side surfaces of the blade (3, 19) on its working end (8, 20) and, in order to optimize the use thereof, it proposes that the convexity be formed of two convex arcs (10, 21) present on each wide-side surface and lying s... | 11/09/1993 |
| 5251521 | TORX-compatible elliptical driver A drive element for use with TORX.RTM. compatible fasteners with an elliptical cross-section attached to an elongated shaft along the central longitudinal axis of the shaft. The minor axis of the ellipse extends along the central longitudinal a... | 10/12/1993 |
| 5237893 | Driver with fastener retention means A fastener drive tool for applying a rotational torque to a threaded fastener for driving the fastener into or out of a workpiece. The drive tool has an elongated shaft portion with a free end which is engageable with a recess formed in the fastener. Alte... | 08/24/1993 |
| 5214987 | Screw fastener and driving tool A screw fastener and a tool for driving the screw fastener is disclosed. The screw fastener has a polygonal driving socket in its head, the driving socket having a substantially square first section and a second section including a rectangular slot radiat... | 06/01/1993 |
| 5207132 | Elliptical lobed drive system There is disclosed a torque transmitting or coupling arrangement for a fastener drive system or the like, wherein the respective externally configured and internally configured components are provided with a series of mating, elliptically curved flutes an... | 05/04/1993 |
| 5005279 | Collet insertion and removal device and method A device is provided for inserting and removing a collet into and from a collet chuck of a lathe. The collet includes a plurality of fingers which are separated by slots. The device comprises a handle portion and a plurality of blades attached to the hand... | 04/09/1991 |
| 4998454 | Screwdriver bit for phillips-head fasteners A modified Phillips-type screwdriver bit is disclosed that is fully compatible with a standard Phillips-head fastener, and is designed to significantly increase the level of torque that can be applied to the fastener while at the same time substantially r... | 03/12/1991 |
| 4970922 | Torque driving tool and retainer for driven member A rotatable driving tool for imparting torque to a driven member, such as a threaded fastener having an axial recess in the head thereof, comprises a circularly cylindrical body with a plurality of substantially circularly helical driving portions project... | 11/20/1990 |
| 4938731 | Rotatable, self-aligning lobe coupling A rotatable coupling having a male member (2) and a female member (4) each rotatable about central axes and ଲ. The male member has lobes (16) and the female member cavities (50) for mutual engagement. The male lobes terminate in wedge-shaped... | 07/03/1990 |
| 4936172 | Interlocking screw and screwdriver A screwdriver and mating screw are shown with interlocking features for coupling with one another to facilitate driving the screw into a workpiece. The screwdriver includes a handle and a blade with an engagement flange on the outer extremity of the blade... | 06/26/1990 |
| 4809569 | Anti-theft system for articles secured by recessed socket head threaded fasteners An anti-theft system is provided for articles such as modular equipment installed into vehicles with Allen type machine bolts. The system employs a monolithic insert member which is bonded within the hexagonally contoured depression in the head of the mac... | 03/07/1989 |
| 4703903 | Cassette tape winding device A cassette tape winding device 10 comprising: a scored, tapered conical portion (12); a generally cylindrical intermediate shaft portion (13), and a toothed driving portion (14) having a plurality of elongated driving teeth (16) spaced from one another an... | 11/03/1987 |
| 4618299 | Locknut and key therefor A locknut having a body portion with an outer surface and first and second ends, a thread extending inwardly into the body portion from the first end, a depression in the second end, an inwardly tapered lobed curvilinear surface defining the periphery of ... | 10/21/1986 |
| 4569259 | Automobile wheel cover locking bolt and wrench combination Correspondingly keyed combination of a round-headed bolt fastener and a generally cylindrical socket, preferably for use in securing an automobile wheel cover against theft. The fastener has a plurality of axial slots, or lock impressions, about the perip... | 02/11/1986 |
| 4538486 | Non-slip screw A non-slip screw of the type having a threaded shank and a slotted head, including a locking surface defined in the screw head by a central transverse slot which extends across the top of the head for engagement with a screwdriver blade tip. The locking s... | 09/03/1985 |
| 4488462 | Screwdriver with dual tip A screwdriver is provided that can be used for installing and removing either single slot screws or screws having two slots that cross at their centers, i.e., "PHILLIPS" type screws. The screwdriver is provided with a shaft which includes a tip segment ha... | 12/18/1984 |
| 4476751 | Multiple screwdriver A multiple screwdriver having a grip and a plurality of bits coupled to the grip at one end. Each bit has a coupling plate comprising a slant portion and a straight portion parallel to the axis of the bit. The bit is coupled to the grip with its coupling ... | 10/16/1984 |
| 4464957 | Fastener and driver combination A combination of a cruciform recess in a fastener and cruciform driver has driver wings 13 which are narrower than corresponding recess radial grooves 21 and has downwardly tapered grooves and wings such that driving engagement between driver and fastener... | 08/14/1984 |
| 4367664 | Combination tool An insert type drive tool (20) is configured to be insertable within both a square-shaped cavity (32) and a hexagonal shaped cavity (40) of the same size. In cross section shank (24) of tool (20) includes a pair of major sides (26) disposed in spaced para... | 01/11/1983 |
| 4356852 | Hand drive tool An improved hand tool includes a well at the top of the handle into which the upper end of the shank extends. The well is adapted to receive a torque producing socket wrench drive which engages the shank in order to transmit the torque producing drive dir... | 11/02/1982 |
| 4355552 | Recessed head screw A modified Phillips-type cruciform recess in a screw or the like, which provides a cling-fit with a driver by causing deflection of the flutes of the driver against the walls of the slot in the recess, comprises a central socket portion and radially exten... | 10/26/1982 |
| 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 |
| 4327790 | Fastener driving device with multiple bits A screwdriver comprises a handle having four screwdriver blades pivotally connected adjacent one end. The blades may be pivoted from a stored position alongside the handle to an operative position in advance of the handle. A locking device locks the blade... | 05/04/1982 |
| 4325276 | Nipple engaging tool A tool for engaging nipples to be applied to or removed from threaded pipe has a plurality of circumferentially spaced longitudinally extending gripping edges formed on elongated members which are arranged in a tapered configuration relative to the longit... | 04/20/1982 |
| 4269246 | Fastener and driver assembly There is disclosed an improved fastener and driver assembly which assures sufficient depth of engagement between the drive socket of the fastener and the working portion of the driver bit to provide efficient torque transfer from the driver to the fastene... | 05/26/1981 |
| 4228723 | Fastener recess A recess for fasteners such as screws, bolts and the like having, in axial alignment with the shank, a central recess of a conic-frustum shape which serves as a natural center for a driver tool or for a drill bit if it becomes necessary to drill out the f... | 10/21/1980 |
| 4187892 | Recessed screw heads and drivers A screw head is provided with projections on selected of the driver-engageable surfaces of the head to interlock with surfaces and edges of the driver to reduce the tendency for the driver to slip out of the recess during driving and also to provide a tem... | 02/12/1980 |
| 4143693 | Hand tool with positive-driver but freely-reversible handle A hand tool, such as a screw driver, with a handle connected to the tool element thereof so that when the handle is turned in one direction, there is a positive driving action but when it is turned in a reverse direction, the handle is free to rotate rela... | 03/13/1979 |
| 4100663 | Carburetor, kit and tool for use therein Changing the jets of a Holley carburetor is greatly simplified by an L-shaped adapter which permits the jets to face upward. The jets are removed through access holes drilled in the upper wall of the float bowl by a special screwdriver/gripping tool.... | 07/18/1978 |
| 4089357 | Threaded fastener 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... | 05/16/1978 |
| 4084478 | Screw heads A screw head is provided with projections on selected of the driver-engageable surfaces of the head to interlock with surfaces and edges of the driver to reduce the tendency for the driver to slip out of engagement with the screw during driving and also t... | 04/18/1978 |
| 4073210 | Screw A screw is described having a head and a stem portion, the head portion having a slot formed therein of such shape as to ensure maximum surface engagement between a screwdriver bit and the side walls defining the slot. The bit of the screwdriver entering ... | 02/14/1978 |
| 4060114 | Tightening device for threaded screw part A tightening device for threaded screw part having an engaging part to be engaged with the threaded screw part to be tightened and a main body continuous with the engaging part, wherein a groove is formed on at least one surface portion of the engaging pa... | 11/29/1977 |
| 3985170 | Screwdriver Screwdriver provided with a flat blade tip to engage a diametral slot in a screw head and a central guide spigot of square or other non-circular cross section for engagement in an axial guide bore of the screw head, is also provided with a pair of buttres... | 10/12/1976 |
