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Document Title |
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7565078 |
Thread structure for an optical lens
A thread structure for an optical lens comprises a plastic lens barrel, and the thread structure is formed on an outer surface of the lens barrel. In each single circle of the thread structure...
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7252150 |
Downhole tool
A downhole tool including a selectively releasable joint, a downhole drilling assembly including the downhole tool, and a corresponding method. In one embodiment of the invention, a downhole...
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6863483 |
Screw provided with self-locking thread
Screw provided with self-locking rolled thread, wherein, in a plurality of places along its extent, the thread is deformed in relation to the normal thread cross section in that the thread outside...
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6796761 |
Bolt and nut
A bolt is provided with a head part and a shank part. The shank part includes a first constant diameter cylindrical part, a transition part, a cylindrical connection part, and a second constant...
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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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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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6454506 |
Anchor bolt with an outer thread having thread turns with different cross-sectional shape
An anchor bolt having a substantially cylindrical stem ( 2 ), and at least one thread provided on the stem ( 2 ) and extending from a free front end of the stem at least over a portion of a...
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6322307 |
Fixing anchor
A threaded fastener (1) is disclosed for anchoring into a substrate comprising a core portion (2) having at least one helical continuous thread provided along a substantial portion of the length of...
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6296432 |
Bolt with extension to prevent thread misalignment
A bolt is provided in the present invention. When said bolt is screwed in a nut, said bolt is guided by engaging the spiral guide groove of said guide boss with the thread of the nut to prevent the...
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6162001 |
Anti-cross threading fastener
A self-aligning, anti-cross threading fastener having first and/or second members with lead threads having a curved surface feature from the minor diameter to the major diameter which allows the...
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6155761 |
Short point anti-cross-threading design
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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5964768 |
Tapered bone screw with continuously varying pitch
A bone screw having a continuously varying pitch includes a tapered root portion having a relatively small diameter on a leading end of the screw and a larger trailing diameter. The pitch of the...
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5865584 |
Plywood fastener for affixing plywood to light gauge sheet metal
A fastener and method for securing plywood to sheet metal comprises a head, and a shank with three distinct segments. The first segment is a threaded tip segment with a pierce point tip; the second...
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5722808 |
Threaded fastener system
A fastener system capable of clamping a workpiece that provides for enhanced distribution of the internal forces that are generated in the components as a result of the assembly of the system. The...
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5580199 |
Fastening screw
A fastening screw is provided with a locking function to prevent loosening thereof after being tightened. In one aspect of the invention, the fastening screw has a head having a bearing face; a...
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5340254 |
Thread forming screw for forming an internal thread in a low ductility material
A thread forming screw for cold forming, using primarily compressive forces, internal threads in a workpiece comprised of a low ductility material, such as magnesium and the like, comprises a shank...
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5060740 |
Screw thread coupling
A thread coupling comprises two interconnected screw threads. Each of the screw threads has a root portion shaped as a portion of an ellipse. With respect to one of the threads having such a shape,...
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5052871 |
Connected screw threads
A modified "Acme" type of male and female thread combination has a single-start male thread (10) of machined steel and a single-start female thread (12) of cast nodular graphite iron. The crown...
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4958973 |
Internal-pressure-bearing female screw
An internal-pressure-bearing female screw adapted to be applied with a varying composite load due to variation of an internal pressure, in which the thread contact heights of the female screw are...
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4861210 |
Threaded element forming for example a screw, and assembly of pieces obtained with the aid of this element
The present invention relates to an improved threaded element forming for example a screw, which comprises a thread (F) whose bottom (3) comprises two arcs of a circle (4) with equal radii (r 1 )...
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4815360 |
Rod-piston connection
A rod-piston connection uses a split ring, having two or more segments, provided with a plurality of shallow internal grooves which are adapted to mate with a corresponding plurality of shallow...
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4799844 |
Elliptical thread design
A screw structure (10) is provided for male and female threads (14) having at least one thread (14) extending helically along a cylindrical support member (12) in spaced thread turns. A root...
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4610064 |
Device for spreading flanges
A device for spreading two flanges (1, 2) mounted in opposite position in a pipe system (3), which device mainly comprises a conical screw element (7) to be inserted into a continuous hole of a...
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4600225 |
Tubular connection having a parallel chevron thread
A thread form is shown for a tubular connection of the type having a pin member adapted to be made up with a box member to form a pipe joint. The pin member has pin threads with thread crests and...
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4600224 |
Tubular connection having a chevron wedge thread
A thread form for a tubular connection of the type having a pin member adapted to be made up with a box member to form a pipe joint is shown. The pin member has pin threads with thread crests and...
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4549754 |
Tool joint
A tool joint in which different tapers on the threads result in an artificial change in pitch and a radial interference and an asymmetric root cut on a larger radius than conventional API threads...
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4527932 |
Self-tapping screw
For the purpose of assuring, during insertion in plastic, a highly stressable connection between screw and plastic with relatively small driving torques, a self-tapping screw is provided with a...
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4408721 |
Fitting to combine air and pressurized water
A hydro-air jet assembly wherein a ball-shaped element has a first passageway therethrough communicating with an air supply and a second passage therethrough communicating with a water supply which...
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4334815 |
Fastener with a modified thread form
A fastener with a modified thread form discourages a nut from becoming irremovably frozen on the shank of a bolt. A first normal thread extends from a base reference surface to a height on the...
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4324036 |
"Method of making orthodontic screw-type device"
An orthodontic screw-type biassing device comprises: a first member having an internally threaded bore, the threaded bore comprising first and second threaded portions adjacent each other in the...
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4288189 |
Threaded insert
A threaded insert and method for making same which is particularly usable when fixedly positioned within a base material which itself is molded about the threaded insert, the threaded insert...
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4189975 |
Screwed connection having improved fatigue strength
A screw-bolt having crest-cut-off threads with their heights progressively decreased to not more than 3/4 times the basic height in the screwing up direction at a gradient ranging from 60/100 to...
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4040327 |
High fatigue screw threads
A symmetric screw thread system including external threads each profiled to have a flank angle of (70 ± 2)° and a flat root located at (0.27 ± 0.02)H from an intersecting point of two lines...
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3918345 |
Thread forming fasteners
1. In combination with apertured workpiece means, the provision of a thread forming fastener device particularly suitable for use with power drivers comprising: A. shank and work-entering end...
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3878759 |
Bi-lobular self-thread forming fastener
There is disclosed a novel self-thread forming fastener having a threaded shank portion, which includes a holding section having a straight thread of generally circular cross section, and a thread...
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3726180 |
INSERT WITH CHIP ENTRAPMENT MEANS
The invention herein disclosed is a self-tapping threaded fastener provided with forming threads, the external diameters of which progressively uniformly reduce to join a retainer means comprised...
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3707107 |
SCREW CONNECTION FOR HIGH LOADING
To interconnect structural units with a screw connection, for example with a bolt and nut, the threads of the bolt and nut are so selected that the pitch of the outer thread is smaller than the...
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3633455 |
SELF-THREAD-FORMING FASTENER WITH EASY THREAD PICKUP
The work-entering end of a self-thread-forming fastener is provided with a step-tapered portion for initially engaging the sidewall of the pilot hole of a workpiece. The invention is characterized...
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3603174 |
CAP SCREW WITH PILOTING SURFACE
A screw-threaded member for piloting and fastening two parts in fixed relation to each other.
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3527136 |
SELF-RETAINED THREAD ROLLING SCREW
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3472303 |
CAPTIVE SCREW ASSEMBLY
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3461770 |
SCREW OR LAG BOLT OF THE WOOD-SCREW TYPE
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3377906 |
Thread-forming tool
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3346278 |
Tapered pipe thread
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3213742 |
Combination thread swaging and fastening screws
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3210096 |
Tapering pin-and-box type threaded coupling
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3101210 |
Valve stem connection
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2844830 |
Method of radially extruding portions of a hollow blank to form external threads of wave form
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2823574 |
Self-tapping fastener
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2787186 |
Screw spike with compression producing thread form
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