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Class 411/387.6 - Resembling a twist-drill-type bit


Subclass of Class 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
Definition: Subject matter wherein the specific drill tip wherein
No. of patents: 22
Last issue date: 02/26/2008


NumberTitleIssue Date
7334976Countersunk 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
7290972Screw 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
7163366Screw with two types of threads
A screw includes a first thread on the shank and located close to the point of the shank, and a second thread which is connected to the first thread and extends toward the head of the screw. Each of the first and second threads includes an upper flank and a lower fl...
01/16/2007
7101133Thread-forming screw fastener
The invention relates to a screw fastener comprising a threaded shank having a force application means for torque transmission and a screw fastener point. The threaded shank consists of a shank core and a self-tapping thread, and the thread is designed as a prominen...
09/05/2006
7025551Fastener clip for use in supplying fasteners to a fastener driving tool
A clip of fasteners for use in attaching a structural panel to a metal substrate comprises a plastic strip with openings characterized by inwardly-extending ribs for gripping and supporting fasteners that comprise a forward self-drilling portion, a rearward self-tap...
04/11/2006
6923611Self-drilling fastener
A self-drilling fastener for attaching wood substrates to metal substrates comprises an elongate shank defining an axis, the shank having a first end and a second end. A drilling tip having a drill point and an axial length is formed at the first end. A broad head i...
08/02/2005
6789991Screw
A screw includes a rod-shaped portion, and a spiral-shaped thread winding around the rod-shaped portion. The rod-shaped portion has a straight portion, and a front end portion tapering towards a pointed front end. Several cutting trenches are formed on the rod-shape...
09/14/2004
6698987Self-drilling and thread-forming connecting element
The present invention relates to a self-drilling and thread-forming connecting element, in particular a screw. The screw comprises a threaded shank including a cylindrical core and a thread formed as a protuberance on the core. The screw also includes an ...
03/02/2004
6679661Fastener for fragile boards
An improved fastener for boarding, particularly to a fastener adopted for use on fragile boards and panels such as gypsum boards mainly comprises a shank, a flange formed on one end of the shank, a drill bit formed on another end of the shank, a screw thr...
01/20/2004
6669396Connecting element for connecting at least two wooden construction parts and a joint plate
In a joint between two wooden structural members (2 and 3) there is inserted a joint plate (4), whose foot part (5) is joined abuttingly to the wooden structural member (2) by screws (7). The joint plate (4) is pushed into a slot (8) of the wooden structu...
12/30/2003
6623227Drill screw for adjusting molding relative to an underlying wall
A drill screw includes a boring end having cutting edges adapted to cut when rotated in a counterclockwise direction, and a portion having threads adapted to enter a piece of molding when rotated in a clockwise direction. The drill screw is driven into a ...
09/23/2003
6558097Screw fastener
A screw fastener (10) including an elongate shank (11) having a longitudinal axis (A), a tip (12) at one end of the shank (11), a head (13) at the opposite end of the shank (11), and a self-tapping screw thread (14) extending along at least a major portio...
05/06/2003
6325583Screw for fixing wooden laths on a roof substructure or a wall foundation
In a screw (1) for fastening wooden laths (10) to a roof substructure provided with wooden beams (9) among other alternatives, one threaded portion (2, 3) each adjoining the head (5) of the screw and adjoining a penetrating or boring point (6) is provided...
12/04/2001
6308483Roofing fastener assembly
The present invention is a roofing fastener assembly. The assembly includes a fastener, a barbed washer, and a screw. The screw projects through the fastener and exits the free end of the fastener. Upon installation of the screw and fastener, the barbs of...
10/30/2001
5899123Break-off drillpoint screw
A fastener, method of fastening, a fastener and drive tool system, and a drive tool for driving a fastener in which the fastener has a leading portion or drill tip portion which is frangible and detachable from the threaded portion. The fastener includes ...
05/04/1999
5829935Fastening arrangement
A fastener assembly connects two layers of different hardness in a panel. e assembly has a screw and has a mechanism for boring through the softer layer comprised of a collar of material softer than the material of the screw. The screw is tapped into the ...
11/03/1998
5605423Self-drilling stud
A self-drilling stud particularly suited for use in normal weight or lightweight composite deck system where the use of standard weld studs is inappropriate because of the relatively thin material cross-section of the steel support member. The stud is hea...
02/25/1997
5160225Structure of a self-drilling threaded insert for use on drywall
A threaded insert for drywall with a structure comprises a cylindrical body which includes an axial entrance hole at one end, an axial cavity at the other end, a high auger disposed thereon, a low thread disposed between the auger, a pair of drilling bits...
11/03/1992
4836730Fastener
A drilling and thread forming fastener is provided having a threaded shank and a pilot end. The fastener pilot end in cross section has a major and minor axis intersecting at the fastener center of rotation. A pair of arcuate flutes are disposed in oppose...
06/06/1989
4753562Drill screw
A drill screw is provided having a head, a male thread section and a drilling section. The screw includes a web on top of the drilling section, and the web has an elongated recess in its central portion. The recess splits the web into chisel edges each ri...
06/28/1988
4617692Tool for drilling and securing screw anchor to a wall
A tool is disclosed for both drilling a hole and thereafter securing a screw anchor therein in a quick and expeditious manner. The tool comprises a handle with a threaded stem extending therefrom. The threaded stem allows a screw anchor and a hard plastic...
10/21/1986
4233880Stainless steel drill screw
A drilling and tapping screw constructed from a 300 series stainless steel material which has the corrosive resistance of the high chromium high nickel content stainless steel while still being capable of drilling through carbon steel materials or the lik...
11/18/1980
 
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