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WO/1994/016636A1 |
A bone screw (10) having a continuously varying pitch includes a tapered root portion (12) having a relatively small diameter on a leading end (16) of the screw and a larger trailing end (18) diameter. The pitch of the screw decreases be...
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WO/1994/015105A1 |
A self-drilling and self-tapping screw (10), the self-drilling portion (38) of which is formed in two major operations. A cutting tip (20, 22, 26) is formed on the tip (16) of screw blank (44) by a pair of rotating circular saw blades (4...
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WO/1994/010465A1 |
A fastener (10) for fastening a pair of metal panels (12, 14) comprises a head (20) which has an annular recess (26) at its underside. A threaded shank (30) has a buttress thread (40) which terminates in a self-driving tip (34). A sealan...
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WO/1994/010460A1 |
A screw (3) is used to join two profiled elements (1, 2). The screw has a drilling part (4), a thread part (5), an unthreaded shank section (15) and a screw head (7). The sum (S) of the length (B) of the drilling part (4) and the length ...
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WO/1993/023680A1 |
A screw (1) has a shank (2) and a head (3); there are thread sections (7, 10) on the shank with an unthreaded shank section (13) between them. In the unthreaded section (13) there are grooves (14) in order to make said unthreaded section...
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WO/1993/023679A1 |
A self-boring and self-cutting screw (1) has a hardenable, plate-like boring part (7), a shank section (B) made of hardenable material and a section (A) made of stainless metallic which forms the shank section (5) and the head (4) of the...
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WO/1993/016292A1 |
The self-boring fastener (1) described includes a fastening element (2) and a plate-shaped bit (3). The lateral peripheral surfaces (7) of the bit (3) have recesses (8) which extend over the whole width of the bit (3). Pressed into these...
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WO/1993/015327A1 |
A self drilling screw (10) for thin metal applications. The screw has a small point (20) for drilling a hole in the thin metal and a substantially larger diameter non-tapered threaded section (12). Between these portions is an extended l...
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WO/1993/000518A1 |
A fastening element, in particular for bones, has a shaft (2) provided with a thread (1) with various pitches, a front end (3) and a rear end (4). The thread (1) continously extends over the whole area of the shaft (2) and has in the are...
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WO/1992/019876A1 |
Fixing element for plaster-board wall, comprised of a plastic element having a cylindrical conical stem. The outside part bearing against the wall has a flat base (1), while the other extremity presents a point formed by four trapeziums ...
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WO/1992/018266A1 |
The invention concerns a fastener bolt with a threaded section (A) and a borer section (C). Located between these two sections (A and C), is an unthreaded shaft section (B) whose diameter (D�1?) is less than the root diameter (D�3?) ...
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WO/1992/016760A1 |
A screw (1) is to be used to secure two components (8 and 11) together by screwing the screw (1) into a blind hole (7) in component (8). Component (11) has a correspondingly larger through hole (13). The shank (20) of the screw has a sel...
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WO/1992/014935A1 |
A fastener anchor (2) comprising a head (12), a body portion (6), an external thread (8) on the body portion (6), and a pair of slots (10) which extend longitudinally of the body portion (6) and which also extend towards each other from ...
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WO/1992/011467A1 |
A tapping screw capable of being easily driven into a thick wall material reliably prevented from untightening in order to use it as a stud bolt and the like. Main threads (2, 2') are dividedly formed on the distal end and the proximal e...
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WO/1992/010688A1 |
A masonry fixing device (1) comprises a steel shank (2) which in the form of the blank is right circular cylindrical form. A ridge-groove-ridge configuration extends helically along the lower portion (4) of shank (2) and comprises a pair...
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WO/1992/010687A1 |
In order to fix a screw-in insert with a self-tapping external thread into a lightweight-construction wall, the invention uses an insertion tool (1) with a driver blade (4) which is inserted into a cavity inside the screw-in insert, pass...
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WO/1992/009816A2 |
An integral sealing element is bonded directly to the engaging surface and selected threads of a threaded fastener. The sealant is a soft pliable olefin or polyolefin based material and is designed to flow between the engaging surface of...
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WO/1992/009817A1 |
A bone screw (10) having a helical thread that gradually increases in thickness from the tip (14) to the head (11) of the screw. The thin thread at the tip of the screw can be inserted into a bone with minimal tearing or cracking of the ...
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WO/1992/001165A1 |
A screw having a main thread (2) to be screwed-in and a sub-thread (3) formed in the direction opposite to the main thread, which is characterized in that a slant surface (3b) of said sub-thread on the screw-loosening side has a sharp sl...
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WO/1991/018215A1 |
A tapping screw (1) is screwed into a prefabricated hole (7) in a workpiece (6). The tapping screw (1) is provided with an adhesive layer (5) which covers at least part of the screw surface (2). When a tap is formed by screwing the screw...
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WO/1991/011632A1 |
A self-drilling screw (3) for securing, for example, wooden parts (2) to sheet metal, in particular wooden edge planks to roof framework metal plates, has a shank (4) with a drilling point (5) at one end and a driving section (7) at the ...
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WO/1991/011631A1 |
A platelike drilling bit (1) may be secured by interlocking or friction engagement in the shank (2) of a self-drilling fastener. At its end region towards its shank (2), the bit (1) has a flat extension (4) in the plane of the bit (1). T...
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WO/1991/011630A1 |
In a flat drilling bit (1) for insertion by interlocking or friction engagement in the shank (8) of a self-drilling fastening, there is a recess (14) in the cutting section projecting freely beyond the shank (8) in the fitting position. ...
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WO/1991/007599A1 |
Described is a screw-in dowel pin with a threaded conical section (4) and a pointed tip (5), and with a stop collar (6) adjacent to the threaded section (4). A head (7) on the stop collar (6) has a slot (13) in it, designed to take a scr...
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WO/1991/003609A1 |
A fastener/plate assembly (10) for fastening material to a roof deck (18) employs a threaded fastener (14) having a shank (46) with two thread sections (44, 48). The distal end portion (42) of the shank (46) has a thread (48) which is lo...
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WO/1990/015259A1 |
The invention is a flush head fastener (14) for joining two or more structural elements (10, 12) together. The structural elements have a fastener hole (18) therein with one of the structural elements (10) being countersunk to accommodat...
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WO/1990/011458A1 |
A self-tapping drill screw with a maximum thread diameter of approximately 6 mm can be screwed into a metal sheet (12) with a maximum thickness of approximately 1 mm. It comprises a slotted head (2) and a threaded shank (3) attached to a...
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WO/1989/007207A1 |
A self-driving, self-tapping screw for screwing into porous concrete has an outer diameter at least one and half times greater than the diameter of the root. The screw thread profile is asymmetrical about a plane perpendicular to the scr...
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WO/1988/005991A2 |
Fixing device (1) made from at least two sections (3, 4) of different materials, or of materials with varying grains or degrees of hardness, one being bound to the other by a process of stored-energy welding, the first section (4), which...
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WO/1988/003997A1 |
A fast tapping screw useful for fastening fiber plates on a metallic infrastructure has on the screw core (2) at least one thread (5). The screw core (2) finishes in a conical piercing point (3). On the conical piercing point (3) are sym...
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WO/1986/006449A1 |
Light gauge self-tapping sheet metal screw having a threaded shank (10, 12) and cap-type head (14), which head has a tool-engaging surface (19). Between the cupped recess (16) of the head and the shank are a plurality of pyramidal ribs (...
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WO/1985/005415A1 |
A wood screw is characterised in that its core (2) is generally cylindrical with a diameter which does not exceed that of a prebored hole, that it comprises two threads, viz. a main thread (3) and an auxiliary thread (4), of which the fo...
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WO/1985/004568A1 |
A fastener (20, 50), particularly for orthopedic use, structurally adapted to be driven into a member somewhat like a nail and to be secured therein by rotating the fastener through a predetermined angular displacement to secure threads ...
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WO/1985/001544A1 |
A device for the adjustable fastening of door or window frames or the like to fixed elements. The device has a screw means provided with a thread for engagement with the fixed element and a sleeve provided with a thread for engagement wi...
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WO/1984/002380A1 |
A screw usable as either a wood screw or a self-tapping screw comprises a two start helical thread (12) having a helix angle of 20o or more with an included angle to the thread profile at its crest of 40o or less. The threads are raised ...
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WO/1983/003187A1 |
Arrangement for detachably securing together the side-pieces (1) and the shelves (2) of a shelving structure, made of wood or a comparable material. The arrangement comprises hook-like fasteners, each of which comprises an insert peg (5)...
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WO/1982/000505A1 |
Tube screws for penetrating materials such as wood, metal and plaster boards to provide an anchoring for a fixing and/or joining such materials is characterised in that at least along its length there are provided external and internal s...
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WO/1980/000425A1 |
A thread forming screw (11) having a helical thread (18) and a tapered lead-in section (14) with a polygonal cross section is formed from a conventional blank (24) by rolling the blank between a pair of thread rolling dies (70) having me...
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JP3246522U |
The present invention provides a wood screw with improved screw-in performance and pull-out resistance. [Solution] A double thread screw having a first thread 5a with a large diameter and a second thread 5b with a small diameter is provi...
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JP7448107B1 |
There is a problem in that if the inserting position or angle of a foreign matter removal tap is misaligned, foreign matter removal becomes insufficient and the function of a female thread cannot be fully demonstrated. Further, there was...
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JP7448582B2 |
A spinal screw for positioning within bone for use in surgical procedures, the spinal screw having a head and a shaft, the shaft having a proximal end and a distal end. A through-hole extends from the head through the shaft to the distal...
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JP7448187B2 |
To provide a connecting tool capable of surely connecting overlapping portions by being smoothly inserted to the overlapping portions of corrugated fiberboards from one side in a front and back direction, by making improvement to effecti...
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JP2024029181A |
An object of the present invention is to provide a screw component that can reduce the mechanical load of a member with a small tightening torque and achieve a high pullout value. [Solution] A threaded part (10) for cutting a mating thre...
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JP7437114B2 |
To provide flow drill screw which can form a female screw at comparatively low torque.A flow drill screw 1 is constituted of a head part 20, a screw part continuously formed at the head part, and having a screw thread at an external peri...
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JP2024011630A |
An object of the present invention is to provide a fastening method for fastening two members made of metal or the like with a simple configuration. [Solution] The fastening method uses a drill screw 10 having a tip portion 12 having a d...
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JP2024004602A |
An object of the present invention is to provide a screw member that enables reliable screw fastening without causing poor fastening. [Solution] A sleeve 10, a threaded portion 22 inserted into the sleeve 10 and exposed from one end of t...
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JP7414354B1 |
An object of the present invention is to provide an improved screw for fastening dissimilar materials. [Solution] A screw for fastening dissimilar materials 1 has a pointed head 20 with a cross-sectional shape having three vertices, each...
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JP7414740B2 |
A self-tapping screw (10, 30) comprising a drive (12) and a shank (14) bearing a thread comprising a main thread (16, 32), wherein the main thread (16, 32) has a maximum main thread external diameter (DAF) and a cutting area (F) and a su...
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JP2023168806A |
To provide a machine screw having high workability, and capable of being driven in at a predetermined angle.A machine screw has a head part and a cylindrical shaft part. The shaft part has a threaded part having a tapered part that decre...
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JP7385656B2 |
A fastener includes a shank having a first end and a second end. The fastener also includes a thread provided on the shank, the thread including a first region having a first thread angle and a second region with a second thread angle, a...
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