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7559846 |
Machining method and apparatus for thread formation on workpiece
Machining techniques and machining apparatus are provided for treating workpieces in an efficient and reliable manner. The machining techniques and machining apparatus employ multiple thread...
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7402109 |
Radius gimlet point anti-stripout screw
A self-tapping screw includes a head, a shaft, a tapered end and a rounded distal tip. A thread includes a thread start on the tapered end. The axial position of the thread start and a first full...
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7360389 |
Manufacturing method of armature shaft, armature shaft and rotary electric machine
In a forging process step, a small diameter portion 12 is formed in the leading end portion of a cylindrical shaft material 30 , and an installation depressed portion 11 d is formed on a base...
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7340978 |
Method and apparatus for making a rotary tool for chip removing machining
A method for manufacturing a rotary tool for chip removing machining with at least one chip flute that extends in the longitudinal direction of the tool. The method involves preparing a mixture of...
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7247099 |
Screw with a partially hardened functional tip and process for the production thereof
In a process for the production of a screw comprising a low-alloy carbon steel, having a head, an adjoining holding portion and a functional tip which, in the outer region of limited radial depth,...
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7237424 |
Split die for forming grooved workpiece
A method of forming a radially expandable externally grooved tubular fastener from metal, comprising the steps of providing a suitable tubular blank ( 11 ) having a tubular wall ( 12 ) and...
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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...
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7195438 |
Swage type fastener
A fastening system is provided that includes a fastener having a pin member with a lock groove and crest geometry that is optimized to receive swaged material from collars of materials of different...
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7189251 |
Open helical organic tissue anchor having recessible head and method of making the organic tissue anchor
The invention relates to a tissue anchor which is an open helix of biocompatible material having a slope of from 0.5 to 10 turns per centimeter, a length from 3 to 75 millimeters, a diameter of...
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7159429 |
Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt
A method and apparatus for manufacturing a bolt capable of mass-producing a multiple screw bolt such as a so-called double screw bolt at a low unit price, and a thread rolling die for use therein....
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7156600 |
Die for, method of making, and fastener with lobed primary thread lead and interposed dual auxiliary thread lead with improved substrate entry end portion
A threaded fastener comprises a first, primary thread lead, and a pair of second, auxiliary thread leads alternatively interposed between successive threads of the first, primary thread lead,...
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7051875 |
Holding strap for curved screwstrip
A curved screwstrip comprising in combination a plastic holding strap and a plurality of threaded fasteners. The plastic holding strap has a greater mass in its top half than in its bottom half so...
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6984235 |
System for fusing joints
A method of fusing a joint between two bones, comprising boring a hole through one of the bones across the joint therebetween and into the other bone, placing the leading end of a screw into the...
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6886384 |
Process for forming a threaded member
A process for the formation of a thread form in a substantially elongate member ( 1 ), wherein the thread form includes at least one rib ( 3 ) spaced apart from at least one other rib along the...
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6878069 |
Helical groove fasteners and methods for making same
Helical groove fasteners and methods for producing the same are provided for use in systems requiring fluid passage through the fastener. In one embodiment, the fastener includes a shank, a head, a...
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6780115 |
Method and system for intraoperatively revising the length of fracture fixation screws
The length of a bone fracture fixation screw may be intraoperatively adjusted with the aid of a cutting jig that includes a measuring block which is slidable along a rail adjacent a measuring scale...
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6712708 |
Self-tapping screw, blank and method for joining thin workpieces and production method for the same
A headed multi-lobed blank, method of manufacturing a self-tapping screw from the blank, and resulting multi-lobed self-tapping screw for joining thin workpieces provides desirable thread-forming...
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6708544 |
Thread rolling die and process for the production thereof
In a rolling die for forming a ball screw by rolling for example, a biting portion is formed on one end of a straight portion while a relief portion is formed on the other end. Further, the helical...
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6702684 |
Method of designing and manufacturing a swage type fastener
A fastening system is provided that includes a fastener having a pin member with a lock groove and crest geometry that is optimized to receive swaged material from collars of materials of different...
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6551323 |
Method of making a bonescrew
A screw for use in spinal and other surgical procedures has a tapered core and fixed pitch threads. The threads have a compound curved inferior surface and constant width crest. The screw may be...
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6540619 |
Bolt and a manufacturing method thereof
The object of the present invention is to prevent the encroaching and the seizure between the bolt and the female screw caused by an oblique screwing of the bolt into the female screw when the bolt...
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6446520 |
Feed screw and method of manufacturing the same
A ball screw 2 or a sliding screw 2 a has a driving force-transmitting shaft 4 or 4 a and a bearing member 6 or 6 a externally fitted to the driving force-transmitting shaft 4 or 4 a...
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6440001 |
Method for forming a threaded pin and nut combination
Apparatus and method for forming a pin and nut fastener assembly for temporarily or permanently securing two panels having conventional drilled generally aligned holes into which the assembly is...
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6371709 |
Screws and threadforms
A screw thread having a threadform including a ridge rising from root to crest with the crest having two peaks, separated by a trough the depth of which is less than the height of the ridge from...
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6328657 |
Threaded fastener and a method of making same
A threaded fastener lighter in weight and easier to produce is made by the moderate temperature-forging, from a raw magnesium material that contains microcrystals whose diameter is about 100 μm or...
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6216510 |
Method of producing self-lock screw
A self-lock screw which has a deep slit so as to facilitate the elastic deformation of the flanks of a thread and enhance the locking effect and which can be produced without the need for skill of...
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6213884 |
Case hardened self-drilling, self-tapping, self-piercing fasteners and process for making the same
A method for heat treating a metal article such as a fastener comprising the step of case hardening the fastener in a gas carborizing atmosphere at a temperature of about 1700° F. or in a...
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6206620 |
Thread chasing tool and method
A pivoting split thread chasing die for rethreading and cleaning damaged or inhibited studs or bolts; and a method of manufacturing the die. The identical main body halves of the pivoting split...
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6149363 |
Lightweight threaded fastener and thread rolling die
The present invention is to a lightweight threaded bolt type fastener having a shank with a large diameter portion and small diameter portion connected by a transition portion; a thread is roll...
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6135892 |
Method of forming a short point anti-cross threading member
The present invention provides a novel fastener member, stud, or other threaded member, for engagement with a female member, and the method of assembly thereof. The fastener member has a novel...
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6033313 |
Male screw and method for manufacturing same
A male screw which has a protrusion protruding from a thread thereof at least with regard to the normal direction to a flank of the thread. To obtain such male screw, a blank is introduced between...
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6024646 |
Swaged pin end of pipe connection
A swaged male element of a pipe connection of the type having a frusto-conical sealing surface adjacent to but separate from the load threads. The swaging is effected prior to final machining of...
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6015351 |
Five spindle fluting machine
A new machine for and method of manufacturing fluted pin fasteners and the pins produced thereby are disclosed which utilize a circular grinding arrangement of a plurality of grinders which grind...
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5979216 |
Wear resistant tool insert
A wear-resistant tool insert for machines used in the manufacture of nails, screws, rivets and similar items from a wire starting material. The tool insert is of divided design in the axial...
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5947827 |
Method of reducing sliding friction of threaded rolled fasteners
A method for reducing sliding friction of threaded fasteners according to the present invention includes the steps of providing a threadless austenitic stainless steel blank, coating the surface of...
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5871403 |
Method and apparatus for producing dual synchronized threads
Method and apparatus are disclosed for forming dual synchronized threads on the interior and exterior cylindrical portions of a tube or pipe, and in the inner and outer cylindrical surfaces of an...
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5842923 |
Screw and method for its production
The screw comprises a circular thread portion 2a formed in a base portion of the screw, in which a helical thread is formed at the same depth and at the same crest angle; a special non-circular...
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5788441 |
Lightweight, compact, threaded fastener and thread rolling die for making same
The present invention provides an improved, lightweight, compact threaded fastener that has a relatively shortened transition thread rollout zone between the grip of the fastener and the threaded...
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5782697 |
Shaft abutment screw, especially for an electric motor, and a method of making such a screw
A method of making a shaft abutment screw, especially for axial engagement with an armature shaft of an electric motor, includes the following steps: (a) pressing out a flat mild steel blank, ...
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5743123 |
Method of thread rolling a screw shaft
In a method of thread rolling a screw shaft, an inclining portion 1c is provided between a machining portion 1a of a screw shaft 1 and a non-machining portion 1b thereof as well as a taper portion...
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5660594 |
Method of making a threaded connection for reinforcing bars
A process for forming a screw thread on a corrugated bar used in concrete reinforcement joints such as anchor bolt joints. The ribs and flank fillets are removed from the end portion of the...
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5636549 |
Wire wound threaded elements including lead screws, roller not assemblies and process
Producing novel threaded members such as lead screws (10, 20) by winding and anchoring a hardened tempered spring wire (14, 16) around a support body such as a screw shaft (11, 15) to form a hard,...
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5547424 |
Method and an apparatus for making an elongate object
In a method of making an elongate object (49) with a head at one end and a point at the other end, a blank (49) is placed in a die (50) having a through-going channel, following which the head end...
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5250007 |
Method and apparatus for forming threads with variable pitch
Apparatus and methods for forming a thread of varying pitch by utilizing a threading assembly which includes a plurality of threading elements having thread cutting or forming portions on the...
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5234291 |
Roof bolts
The roof bolt tendon comprises a length of square twist steel with a partial thread formed directly thereon over at least part of its length. The partial thread, which may extend for the full...
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5221234 |
Method and apparatus for making a screw having variably canted threads
A cutting device and method for its operation are utilized to apply variably canted threads to a screw blank. A conventional cutting lathe is provided with a conventional hydraulically operated...
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5127783 |
Carbon/carbon composite fasteners
A carbon and/or ceramic fiber reinforced carbon and/or ceramic matrix composite threaded member including a core, a fiber containing thread-defining element bonded to the exterior of the core and a...
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5086532 |
Methods and apparatus for forming fasteners and threaded connections
The present invention is a method of forming on a fastener body by relative rotary and axial movement of a thread forming tool and the body, a thread having a pitch which changes progressively...
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4969780 |
Method for using a die holder with centering and squaring guide to cut threads on a cylindrical workpiece
A method for using a die holder with centering and squaring guide to cut preliminary and final threads on rotatable stationary workpieces is provided and includes a locating pin, a die with set...
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4966024 |
Method of forming a screw threaded fastener
A screw threaded method of making fastener particularly intended for use in fastening corrugated sheet material to metal purlins comprises a drilling point (1), a head (2), a first self-tapping...
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