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7416374 |
Fast make-up fatigue resistant rotary shouldered connection
A thread form having improved strength and fatigue resistance. The root of the thread is cut on multiple cutting radii having displaced centers. At least two of the root surfaces are formed by...
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7350438 |
Connection rod for internal combustion engine
An internal combustion engine connecting rod is designed with bolts having a minimum required strength. A strength safety factor Sfa is calculated based on an axial strength limit load F X of the...
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7338243 |
Thread-cutting screw
A thread-cutting screw ( 1 ) serves for being screwed into the bore-hole wall ( 1 a ) of a bore-hole ( 1 b ). It comprises a substantially cylindrical core ( 2 ) of metal which has a central...
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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...
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7326014 |
Interactive fit screw thread
A threaded fastener includes a curved-line path thread provided in a helical pattern along a shank of the fastener. The curved-line path can be provided on either side of the standard straight-line...
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7281925 |
Implant arrangement
An implant is arranged with a thread which can be exposed to a jaw bone and which has a first extent in the longitudinal direction of the implant. Thread flanks are assigned second extents between...
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7255523 |
Dual threaded screw for composite materials
An improved dual threaded fastener for composite materials having a head and a shaft. The head is affixed to one end of the shaft and the shaft includes a point at its other end. The shaft includes...
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7246979 |
Multi-pitch screw, multi-pitch nut, feed screw device using the screw and nut, and method of producing the nut
A flat portion 12 a and a slope portion 12 b are provided on a thread 12 of a multi-pitch screw 10 alternately. The flat portion and the slope portion are provided on the thread of a...
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7214020 |
Looseness resisting screw and stud hole
A looseness resisting screw formed with an external thread includes a first thread area having a substantially uniform outer diameter and a second thread area extended from the first thread area...
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7207248 |
Threaded screw fastener characterized by high pull-out resistance, reduced installation torque, and unique head structure and drive socket implement or tool therefor
A threaded screw fastener is provided with a head portion that has integrally incorporated therein dual drive structure whereby the single threaded screw fastener can be rotatably driven by...
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7163366 |
Screw 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...
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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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7153075 |
Press fit fastener and method of producing it
A press fit fastener ( 1 ) includes a shank ( 2 ), a head ( 3 ) and a press fit portion ( 4 ) being located at the shank ( 2 ). The head ( 3 ) is located at the first end of the shank ( 2 ). The...
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7101134 |
Fastener having multiple lobed thread
A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. The lead-in and lead-out profiles of the bosses, and other features of the bosses and...
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7101133 |
Thread-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...
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7044702 |
Screw with a plurality of screwing angles and mold device for forming the same
The screw with a plurality of helix angles comprises a first section having a first thread with a first helix angle, at least one third section having a third thread with a third helix angle; and a...
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6994502 |
Pole joint screw for a basketball goal system
A pole joint screw may be used to connect a first section of a basketball support pole and a second section of a basketball support pole. The pole joint screw may include an elongated body...
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6976818 |
Threaded fastener particularly suited for plastics
A male threaded fastener particularly suited for use in plastics has a high thread and a low thread. Depressions are provided in the pressure flank of the high thread. Dimensional relationships are...
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6923611 |
Self-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...
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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...
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6899500 |
Fastner having multiple-bossed lead
A threaded fastener includes a lead having bosses separated from one another by bases along the thread crest. Two such leads may be formed such that lead-in profiles for of one lead are disposed at...
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6887023 |
Screw with protruding sheets on head portion
A screw with protruding sheets on a head portion comprises a thread portion; a screw tail at one end of the thread portion, a slot formed on the screw tail; a plurality of screwing sheets formed at...
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6878890 |
Circuit breaker lockable fastener securing a movable contact to its terminal mounting
An improved lockable fastener that can be employed in a circuit breaker application includes a first member and a second member that are threadably cooperable with one another and a locking member...
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6860690 |
Screw member with biting features
A screw member having a loosening prevention function is provided to improve a fastening power and a relative strength in thread connection. With an arrangement to provide a first crest portion and...
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6846142 |
Screw for screwing into a material of low strength
Screw made of plastic for screwing into a material of low strength, e.g. rigid foam plastic, having a deep thread compared with the screw shank, the screw shank running out conically into a screw...
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6726689 |
Helical interlocking mating guide and advancement structure
A structure including a pair of helically wound interlocking forms located on a cylindrical closure for an open headed medical implant and in a receiver between arms of the implant respectively....
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6726420 |
Screw thread with clearance
An internally threaded body member having thread clearances includes a bore extending at least partially into the body member. The bore has a screw thread disposed therein. The screw thread has a...
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6722833 |
Self-threading screw with straight load flank and angled rear flank profile
Self-tapping screw with rolled thread turns, on which the angle bisector of the thread turn formed by the load flank and the rear flank slopes away from the screw head at an angle to the...
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6702537 |
High profile thread forming screw
A thread forming screw configured for insertion into relatively hard plastics includes an elongated core region having two ends, a head at one end and a point at the opposite end, a helical thread...
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6685411 |
Bolt
The object of the present invention is to dissolve effectively the problems of the encroaching, the seizure, and the racing. To attain said object, a bolt having a threaded shank portion wherein a...
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6672813 |
Tapping screw
The present invention is directed to provide a tapping screw for a soft material having a sufficiently large stripping torque compared to a driving torque and an increased tolerance of a fastening...
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6623228 |
Thread-cutting screw
A thread cutting screw to be screwed into a predrilled hole in concrete, masonry, or the like is characterized in that the relationship between the load bearing thread surface AOn of the loaded...
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6595733 |
Fastener having torque reducing thread
A gutter fastener ( 10 ) having a first shank portion ( 14 ) with a head ( 12 a ) integrally formed on one end and a second shank portion ( 16 ) integrally formed with the opposite end. The first...
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6572315 |
Threaded fastener having a thread crest greater than its thread root
A progressive (variable) pitch, interlocking thread with a tooth cross-section that is wider at its crest than at its root which creates radial clamping action when tightened into a tapped hole...
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6565302 |
Thread forming screw
A thread forming screws including opposite flanks connecting the screw crest region with the screw root region and tapering outwardly toward the root region, with each flank being formed of outer...
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6557580 |
Self cleaning irrigation valve with offset manual on actuator, body/bonnet alignment, and captured screws
An irrigation valve comprises a valve housing made from a valve body joined to a valve bonnet by a plurality of attachment screws. The valve body and valve bonnet have an alignment rib received in...
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6514026 |
Screw
A screw ( 1 ), in particular a concrete screw, for being screwed into a drilled hole ( 20 ) comprises a core ( 2 ) with a pilot end ( 3 ), a lengthwise screw-in direction ( 5 ) and a central...
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6505799 |
Ice screw with non-linear taper
An ice screw device for winter, alpine and ice climbing includes a banger couplable to a tubular shank with a screw thread. The tubular shank includes an ice engaging portion configured to be...
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6485220 |
Tool joint
A tool joint comprising a male member a female member. The male member having a coupling portion rearwardly from a body portion. The coupling portion having a frustoconical forward portion and a...
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6468014 |
Screw with spiral triangular threads
A screw includes a cylindrical shank having an upper portion formed with spiral circular threads and a lower portion formed with spiral triangular threads, each of the spiral triangular threads...
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6454315 |
Oil well pipe screw joint, and threading method and apparatus therefor
An oil-country-tubular threaded joint can withstand tensile forces, and in addition, other forces such as compression and bending forces, thus producing highly improved characteristics in regard to...
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6435788 |
Thread repair insert
An insert for thread repair having an interior thread and a specially formed exterior thread which both precludes upheaval between sides of the cracked material on opposite sides of the crack and...
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6428258 |
Non cutting hole-shaping and thread-forming stainless screw and process with impact for driving in the same
A hole-shaping and thread-forming screw ( 1 ) has a non-cutting hole-shaping end section ( 2 ) that ends in a point, a haft section ( 4 ) provided with a thread ( 3 ) and an engagement section ( 5...
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6419436 |
Auger-like drywall screw
The present invention relates to a novel screw for use with dry wall and for hanging articles therefrom. This invention provides a screw with a head adapted for engagement with a driving tool, a...
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6402447 |
Connection bolt for repeated tightening beyond yield point
A connection bolt ( 1 ) for repeated tightening beyond yield point which bolt ( 1 ) comprises a head ( 2 ) and a shank which shank is provided with a thread, whereby said head ( 2 ) of said...
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6398786 |
Strain-inducing conical screw for stimulating bone transplant growth
The invention involves a differential and/or conical screw of a variable increasing pitch which is used for the initial mechanical stimulation of a healthy bone, in order to induce a new internal...
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6394726 |
Threaded fastener
A threaded fastener having a shaft with a screw thread disposed thereabout, a pressure flank of the screw thread having a first pressure flank angle on a radial inner portion thereof and a second...
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6375401 |
Fastener shank crossection utilizing non-circular constant breadth curves
A fastener includes a head and a threaded shank. The shank defines an inner periphery and the thread defines an outer periphery. The shank and the thread each have a generally polygonal crossection...
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6340277 |
Self-tapping screw
Self-tapping screw having an at least partially non-round enveloping curve for the thread and having a penetrating section and a retaining section, it being the case that the penetrating section...
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6332741 |
Masonry anchor device
An improved anchor device or fastening member which is particularly suited for use in the attachment of various fixtures and equipment to masonry, concrete, and other hard and/or friable substrates...
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