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6474920 |
Sandwich type expansion bolt
An expansion bolt includes two symmetrical bolt halves. The bolt halves each includes an inner side, an outer side, a front face, a rear face, and outer threads are provided at the outer side for...
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6305479 |
Wall tie reinforcement and method
A helical wedge tie, anywhere from 21/2 inches to 4 inches in length, (which is approximately the width of a standard brick), can be utilized to wedgingly engage the mortar in a wall after a...
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6115890 |
Cord and a positioned spherical clamp
A two-piece clamp, of a spherical shape convenient for use as a hand grip, attached about a cord in an interposed position therebetween, which impales the cord with pointed teeth so that the clamp...
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6076437 |
Screw set in place and removed rapidly, its fabrication process and tool for its removal
A screw intended to be set in place and removed rapidly. The screw is characterized in that the threads are intended to take two positions: a first position wherein they project at the periphery of...
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6048150 |
Bolt with load spreading and sealing washers
A forged, integral bolt (20) has a head, a tapered neck (22), a shank, and a plurality of plastically deformable, raised, contact surface portions (31) uniformly positioned adjacent the neck and...
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5803671 |
Hollow bars and method of manufacture
A hollow bar (3) and a method of manufacturing the hollow bar are disclosed. Typically, the hollow bar is a threaded rock bolt or a drill rod. The hollow bar (3) comprises two or more elongate...
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5788443 |
Male coupling with movable threaded segments
A male coupling with movable threaded segments, consisting of a shaft, a sleeve mounted to move along the shaft, a plurality of threaded segments surrounding the shaft and mounted to move inwardly...
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5733069 |
Loose roof plate retensioning device
The present invention relates to a loose roof plate retensioning device for the roof of a mine. The device is comprised of an externally threaded split bushing, a spacer unit and an internally...
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5368344 |
Coupling stud assembly
A coupling stud assembly for coupling together a pair of flanges. A stud ing a tapered surface is inserted into respective overlapping through-holes provided in the flanges so that a space is...
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5281066 |
Segmented rod used for bonding two adjacent planar surfaces
A method and apparatus for patching a hole in a panel without the use of a bonding agent or the aid of a welding apparatus. The method encompasses the placing of a patch within the confines of a...
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5242445 |
Split eyebolt for spinal rod
A one piece item of stainless steel or other material suitable for permanent placement in the human body, forms the eye and shaft of an eyebolt by a combination of two shell-like portions, each...
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5228818 |
Fastener system for male and female threaded members
A fastener system is providing having a male threaded member and a female threaded member with arrangements for achieving a locking connection between the parts to prevent relative rotation of the...
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5129388 |
Device for supporting the spinal column
A device for supporting a spinal column includes a screw having a U-shaped head, a joining element received within the head, a threaded bolt received within and threadedly engaging the head, and a...
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5090857 |
Metallic threaded composite fastener
A metallic threaded composite fastener, particularly suited for high temperature applications, has a body member made of high temperature-resistant composite material with a ceramic coating. The...
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5073072 |
Threaded split-bushing fastener assembly
The threaded split-bushing fastener assembly has been designed for high temperature applications such as on hypersonic vehicles. The fastener assembly consists of a pin (with a standard countersunk...
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5061134 |
Divided bolt fastening device
A fastener comprised of longitudinally divided bolt pieces (1,2,3) inserted into the hole, with trailing tips of the bolt pieces connected to a string (5), which is pulled out of a hole into which...
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5055056 |
Ground wire connector
An electrical connector adapted for connecting a ground wire to a service wire employs a clamp arm having a bifurcated head which clamps the ground wire. A nut mounted to a threaded shaft of the...
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4975014 |
High temperature low thermal expansion fastener
A high-temperature, low-thermal expansion fastener for joining low thermal expansion refractory materials includes a pin with an inset portion on the shank of the pin that forms a head-facing...
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4845317 |
Threaded insulator
An insulator and wire mounting structure for supporting an electrically conductive fence wire from a metal fence post having a generally T-shaped cross-section. The insulator and wire supporting...
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4828443 |
Eye bolt and method of manufacture
The invention is an eye bolt structure and method of forming including bending a straight rod to include a straight shank portion, a loop portion and a straight rod end portion, the rod end portion...
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4822225 |
Screw for easily engaging the internal thread of a tapped hole
The screwed shank (2) of a screw (1) is divided into two halves (4, 5) by a slot (3) running centrally in longitudinal direction and two chamfers (7) running vertically to the slot (3) are provided...
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4813109 |
Clip for fastening the ends of an elongate flexible band
A clip comprising a body portion and securing means; said body portion being provided with at least one protrusion extending outwardly therefrom, and including at least one slot in at least one...
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4798501 |
Flexible rock anchor
The flexible earth anchor useful for reinforcing underground structures such as a traverse is insertable in a hole in the ground to a certain depth and is attachable with the walls of the hole at...
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4655723 |
Child's activity ring toy
A child's activity ring toy having first and second concentric ring portions, at least a part of at least one of the ring portions having thread segments along a multiple screw path with adjacent...
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4488843 |
Reusable one piece drive fastener
A fastener is disclosed which is installed quickly and easily the first time by simply driving a frangible drive pin. The drive pin has ribs which cooperate with grooves in an axially extending...
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4478546 |
Quick insertion and release bolt system
A quick release bolt system utilizes two bolt sections. Each bolt section approximates one half of a bolt and has a half head portion and half threaded portion. Each section has an inner face which...
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4468149 |
Assembly for anchoring an element to a slab
An assembly for anchoring an element to a concrete slab (10) through means of a bore (22) extending through the slab and a bolt (26) removably received within the bore (22). The bolt (26) has a...
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4379650 |
Anchoring means for wall braces
The foot plates of a tilt-up wall bracing system are anchored to a concrete floor slab by means which positively clamp the floor slab to the foot plates. The clamping means include a throughbore in...
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4104951 |
Fixing stud for joining building or constructional elements
A stud which, by being inserted through holes in structural or like building members, joins them together, includes two parts which can be moved relatively over contacting, planar side surfaces, at...
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4056912 |
Method for releasing tilt-up panel hoisting member
Tilt-up building wall panels are fitted with inserts which are cast into the panel. The inserts have threaded openings into which a collapsible split bolt is inserted. The bolt is spread apart with...
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3943817 |
Split bolt
The split bolt comprises plural bolt segments having threaded outer surfaces which are brought radially together to render the bolt insertable into a complementary threaded recess, and spaced...
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3922946 |
Split bolt
Disclosed is a split-bolt having an improved wedge for separating the two bolt sections into threaded engagement within a nut. The wedge can be easily extracted from between the separated bolt...
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3461769 |
ADJUSTABLE LENGTH SHOULDER SCREW
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3456547 |
ANCHORING MEANS
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3204514 |
Fixing device
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3172238 |
Anchor bolt clip for masonry construction
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3092884 |
Sheet metal fastener
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2875674 |
Blind bolt with pivoting ledge
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2836095 |
Split bolt with protruding pivot pin to provide a stop shoulder
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2804796 |
Multi-part bolt having resilient means providing a stop shoulder
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