Class 411/387.3 - Having enhanced gripping structure

Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Subject matter wherein the drill tip which includes a
No. of patents: 30
Last issue date: 05/06/2008

Number	Title	Issue Date
7367768	Deck screw and installation method for composite lumber A deck screw and an installation method is intended for use with composite lumber, although it can be used with other products. The deck screw may be provided with a head and a shaft that has two regions of varying diameter. The upper region has threads that exceed ...	05/06/2008
7334374	Stucco sheathing fastener A fastener including a body having a predetermined axial length, wherein the body includes a screw head at one axial end of the body, a threaded portion at an opposite axial end of the body and an unthreaded shank portion extending between the screw head and the thr...	02/26/2008
7334976	Countersunk screw The invention relates to a countersunk screw having a threaded shank and a countersunk head, which latter has a conical surface tapering at a countersinking angle in the direction of the threaded shank. The conical surface has a plurality of ribbed protrusions distr...	02/26/2008
7329077	Fastener apparatus for roofing and steel building construction A fastener apparatus includes a frusto-hemispherical head portion having a flat top surface, a curved outer surface, a base portion, and a peripheral edge, with the flat top surface bearing a tool fitting. A downwardly-depending lip portion extends from the head per...	02/12/2008
7320569	Self-drilling hollow wall anchor A high strength failure-resistant hollow wall anchor having a self drilling threaded installation structure adapted to be broken, after positioning, by an inserted screw, into expandable anchoring elements. The anchoring elements engage internally formed cams and th...	01/22/2008
7290972	Screw anchor for friable material A screw anchor includes a roughly cylindrical body (1) with a drilling portion (3) provided, at its free end, with drilling teeth (14-16), at the other end of the body, a bearing flange (5) and an external screw thread (7). ...	11/06/2007
7229442	Cervical vertebra plate The invention relates to a cervical vertebra plate (10) for osteosynthesis, having two receiving openings for the screw heads (18) of bone screws (16) in order to secure the cervical vertebra plate to two cervical vertebrae. The receiving openin...	06/12/2007
7217195	Method of producing left-right screw The present invention provides a method for manufacturing a right- and left-hand screw having a first external right-handed thread and a second external left-handed thread formed by an inexpensive rolling process using a rolling die with a first thread-cutting die f...	05/15/2007
7144212	Self-drilling hollow wall anchor A high strength failure-resistant hollow wall anchor having a self drilling threaded installation structure adapted to be broken, after positioning, by an inserted screw, into expandable anchoring elements. The anchoring elements engage internally formed cams and th...	12/05/2006
7090453	Screw A screw which can be more quickly screwed into a work piece and has better chip-exhausting effect. The screw has a rod body and higher thread and lower thread formed on the rod body. On a conic section of the screw, a cutting thread with another guide angle larger t...	08/15/2006
7063491	Reverse barb system for screws and nails The reverse barb system for screws and nails includes fasteners that are barbed to prevent backing out once driven into a workpiece or construction material, such as wood. A screw with barbed threads has several barbed thread sections. Each barbed thread section is ...	06/20/2006
7040850	Fastener for use with frangible material A metal fastener for frangible material has a threaded shank, a head proximate one end of the shank and a tip at the opposite end. The fastener has a coarse pitch and relatively large ratio of major to minor diameters suited for securing the fastener into frangible ...	05/09/2006
7014386	Screw connection of components to sheet material and method of effecting connection A secure connection (10) of a component to a sheet material including, an extent of thin sheet metal (20) having an attaching surface (36), a component (30) having a mating surface (37) abutting the attaching surface, an aperture (...	03/21/2006
6907699	Gypsum wallboard fastener A fastener for securing a 0.625 inch (⅝ inch) thick gypsum wallboard panel to a wooden building frame. The fastener includes a body having a predetermined axial length. The body includes a cupped head at one axial end of the body, having a diameter that is at leas...	06/21/2005
6739815	Wood screw A wood screw is provided which can be smoothly driven in with a small driving force. Helical ribs that are the highest at the center and gradually lower toward both ends are formed on the outer periphery of the tip of a shank having threads on the outer periphery at...	05/25/2004
6152666	Screw for use as a fastener in fibrous material such as wood The thread (15) of a wood or the like screw has pairs of V-shaped recesses (22, 23) in the edge of a selected intermediate length of the thread (17). Each pair defines a W-shaped cutout (19, 20, 11). The cutouts (19-21) extend into only a part of radial w...	11/28/2000
6102642	Screw head A drilling tapping screw includes a head engageable with rotary fastening tool, and a shank extending downward from the head and having a lower end having with a drilling tip, including a tapping and fastening thread defined from the end face thereof to t...	08/15/2000
5743690	Self-locking tubular fastener and fastener system A threaded self-locking fastener, having a hollow body open at both ends and an elongated central through bore with a slot extending the length of the hollow body. Version 1 has sharp edges on the slot that dig into the bore of the work piece to prevent r...	04/28/1998
5702445	Anchoring element for implantation in tissue, for holding prosthesis, artificial joint components or the like An anchoring element for implantation in bone or other tissue takes the form of an externally threaded screw, for example of titanium or other tissue compatible material. Such an anchoring element may be used, for example for holding prostheses or artific...	12/30/1997
5702443	Anchoring element for implantation in tissue, for holding prostheses, artificial joint components or the like An anchoring element for implantation in bone or other tissue takes the form of an externally threaded screw, for example of titanium or other tissue compatible material. Such an anchoring element may be used, for example for holding prostheses or artific...	12/30/1997
5622464	Screw with increased driving resistance at proper depth A screw for use with a washer as a sealing fastener having formations near the head of the screw to increase driving resistance when the portion having the formations reaches a surface into which the screw is being drilled. The screw includes a shank with...	04/22/1997
5516248	Low torque wood screw A low torque fastener screw for securing a wooden workpiece to a substrate includes an elongated body defining a longitudinal axis and having an enlarged head formed on one end, an external pointed thread formed on an opposite end, an elongated unthreaded...	05/14/1996
5487633	Self-drilling screw A self-drilling screw is provided which is suitable for use with both relatively thick metal plate and relatively thin metal sheet. The screw is formed from a blank 1 which includes a shank 2 extending between a head 3 and drilling tip 4. The shank 2, adj...	01/30/1996
5433569	Screw A self-drilling screw (10) having a body (16) that includes a driving head (18) and aperture (20) at its one end and a self-drilling tap (22) at its other end. Intermediate the length of screw (10) a solid annular member (24) comprising a peripheral edge ...	07/18/1995
5304023	Metal panel fastener A fastener for fastening a pair of metal panels comprises a head which has an annular recess at its underside. A threaded shank has a buttress thread which terminates in a self-driving tip. An sealant/adhesive coating is preapplied to the fastener. The co...	04/19/1994
5234299	Self-drilling anchor A self-drilling anchor installable in a wall by means of a screwdriver, the anchor being adapted to receive a threaded fastener serving to hold a fixture against the wall. The anchor includes an externally-threaded shank section having a head engageable b...	08/10/1993
5199839	Fastener screw having improved installation and self-locking characteristics A fastener screw includes a head portion, an elongated shank and a multiple-lead thread formed on the shank opposite the head portion. The head portion has a generally planar end surface having a polygonal drive recess therein. A generally longitudinal ch...	04/06/1993
5074728	Drill-coexistent screw A screw includes a drill point formed on a root portion of a threaded shank of the screw having a plurality of helix flutes helically formed in the screw emerging from the drill point through the threaded shank and a plurality of packing rings annularly s...	12/24/1991
4749322	Aluminum roof panel fastener A threaded fastener unit comprising a preassembled fastener for use in association with thin metal panels having a head with a clamping surface thereunder, a shank and a drill point, said shank having an upper unthreaded shank portion, a lower threaded sh...	06/07/1988
4157677	Self-drilling dowel with drill head A self-drilling dowel has a drill head extending across its leading end. A bore extending through the dowel from its trailing end is closed at its leading end by the drill head forming a centrally located blind bore. The blind bore is cylindrically shaped...	06/12/1979

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Class 411/387.3 - Having enhanced gripping structure