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7473064 |
Load indicating fastener insert
A method and apparatus for determining fastener axial loading includes a fastener insert having an arched bottom surface, which deflects correlative to the level of axial loading. A load indicating...
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7207760 |
Washer and fastener provided with a washer
A washer has a body having an axis and provided with a first face surface located at one axial side and adapted to cooperate with a nut, a second face surface located at an opposite axial side and...
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6986298 |
Method of and power tool for fastening objects
For assembling at least two parts of an object with one another, a bolt having a thread is introduced into the parts, a washer is placed on a free end of the bolt, a nut is threadingly connected to...
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6712031 |
Support device for rocker arm
There is provided a support device for a rocker arm, which is capable of suppressing deformation or wear of a washer, and greatly improving the working efficiency in assembling the washer to the...
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6425718 |
Direct multi-tension indicating washer having bumps of a first and second height
A washer extrudes indicating material of varying colors depending on the compression force applied to it by providing a first and second surface having respective bumps and indentations. The...
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6250863 |
Washer having stressed and unstressed strain gauges
A washer having a plurality of strain gauges, at least one of which is positioned on a portion of the washer subjected to axial force and at least one of which is positioned on a portion of the...
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6135687 |
Direct tension indicator for embedded anchor members
A device used to indicate whether a predetermined compressive load has been applied to the device. The device is formed to receive an anchor member upon which a tensioning force is to be applied in...
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6095733 |
Threaded fastener with determinable clamp load
A threaded fastener for securing workpieces with a determinable desired clamp load and including a nut assembly and a bolt with the nut assembly including a nut member with a lock base having a...
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5927918 |
Trailer ball fastening assembly
A method and apparatus for mounting a trailer ball to a mounting platform. The apparatus includes a trailer ball having a threaded stem, a flat washer, and a nut having a plastic collar. The...
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5885034 |
Washer for use in mining
The washer is of frusto-conical shape as viewed externally and consits of a body (21) and a tapered flange (23) depending therefrom. When the lip (28) of the flange rests on a flat surface and the...
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5882148 |
Apparatus for yielding support of rock
An apparatus for yielding rock support in a rock bolt where yielding is achieved by one or more yielding elements at one or more levels of loading.
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5722807 |
Clamp load indicator
A method and device for monitoring fastener loads as well as clamp loads imposed on base metal with a special washer usable with bolt heads, nuts, and other fastener elements which washer has at...
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5667346 |
Direct tension indicator washer
A pre-load indicating washer for properly tensioning a joint held together by an externally threaded member and an internally threaded member. The pre-load indicating washer has a plurality of...
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5586851 |
Prestress-monitoring element for screw-type anchors
A prestress-monitoring element for screw-type anchors is arranged to be inserted like a washer between a nut and an article to be fixed and includes a pressure ring and an expansion ring. If the...
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5487632 |
Direct tension indicator washer
A pre-load indicating washer in which a plurality of protuberances, struck and partially sheared from the annular body of the washer, are pushed under load back into a corresponding plurality of...
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5447362 |
Quick release apparatus for a bicycle
A quick release apparatus includes a tightening shaft including a screw portion at one end thereof, a tightening control lever mounted on the other end of the tightening shaft, and a clamp mounted...
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5385054 |
Fastener tension monitor
A device to monitor tension in a fastener assembly such as a stationary bolt and a moveable nut for securing elements therebetween. The device is in the form of a washer for use in the assembly...
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5188494 |
Torque indicator device and method for use with a threaded fastener
The present invention is a torque indicator device that provides a positive indication as to whether or not a threaded fastener has been tightened to a desired torque. The present invention torque...
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5088866 |
Indicator-nut threaded coupling with load-indicating device adapted to be arranged on anchors, in particular grouted anchors for mining or the like
A indicating-nut threaded coupling with load-indicating device (1) adapted to be arranged in particular on grouted anchors for mining or the like and in order to obtain a simple solution which is...
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5064312 |
Delay stopper for a mine roof anchor and method of manufacture thereof
A delay stopper for use in a mine roof anchor is provided. A mine roof anchor has a threaded roof bolt and a threaded receiving member for the roof bolt whereby the roof bolt and the receiving...
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5015132 |
Direct tension indicator washer
A pre-load indicating washer in which a plurality of protuberances, struck and partially sheared from the annular body of the washer, are pushed under load back into a corresponding of indentations...
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4988246 |
Apparatus for indicating incomplete and complete fastening of screw components
Apparatus for indicating incomplete and complete fastening of a screw includes a washer and a ring of a generally flat synthetic resin sheet. The washer includes a pair of washer portions of a...
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4954018 |
Yield tube bolt assembly
This invention relates to a rib bolt assembly including a collapsible yield device located between an exposed end of the rib bolt and a side of a mine pillar in which the collapsible yield device...
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4889457 |
Load indicator
A load indicator partly collapses under a predetermined compressive load to provide visual and tactile indications that such predetermined load has been reached or exceeded. The indicator has a...
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4887948 |
Deformable washer, particularly for predetermining the minimum force needed for tightening a nut or a screw
Deformable washer, particularly for predetermining the force needed for tightening a nut mounted on a screw or a screw cooperating with a tapped hole. The washer is provided on one of its faces,...
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4773272 |
Apparatus and method for measuring bolt tension in situ
An apparatus and method for measuring bolt tension in situ is disclosed. In one embodiment, a tab (12) is disposed in a radial groove (42) in a washer (10) with the proximal end (46) of the tab...
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4732517 |
Anti-tamper fastener shielding apparatus
Apparatus for assembly with a bolt or screw upon installation thereof to prevent tampering therewith, including a one piece collar device having an outer annular jacket member with a restricted...
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4556350 |
Mine roof anchor bolt
This specification describes a new anchor or rock nut which is used in association with an anchor bolt to rupture packages of two or more component setting mixtures. The nut is characterized by...
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4483648 |
Bolt tension indicating means
Improved flat annular washer for indicating tension on associated high tensile strength bolt. Washer bears against either bolt head or nut of given radius. Washer includes means for indicating...
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4479666 |
Load-line fastener
A fastening assembly includes: (a) an axially elongated fastener having axially spaced differentially threaded portions respectively adapted to threadably engage threaded extents on members to...
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4408925 |
Cable tension meter
A turnbuckle assembly has a self-contained tension pre-load indicator utilizing internally mounted compact conical spring washers (belleville washers) and a radially projecting movable stem which...
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4333220 |
Method and apparatus for tightening an assembly including a pre-load indicating fastener
A method and apparatus for tightening an assembly including a pre-load indicating fastener is disclosed. Pre-load indicating fasteners are generally tightened until a crushable element, forming a...
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4289061 |
Device and assembly for mounting parts
An improved assembly for mounting a part onto a base member is provided by incorporating a tubular insert having a hollow inner core in a mounting hole in the part. A fastener, such as a bolt,...
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4131050 |
Visual load indicator
A load indicator is disclosed which has a spring washer portion and two levers. As the washer portion is deflected under compression, the levers deflect and amplify the deflection of different...
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4072081 |
Tension indicating washer unit
A multipiece, preassembled washer unit incorporating an upper washer and a lower conical washer with a ring gauge interposed between the outer marginal surfaces of the washers so that the gauge is...
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4064785 |
Threaded connections
A break-out washer assembly for facilitating undoing a connection between interengaged complementally threaded elements. The assembly comprises a washer which tapers radially inwardly and is made...
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4061073 |
Controllably deformable fastener assembly
A controllably deformable fastener assembly has a fastener, clamping means, and a crushable element. The fastener has a threaded shank portion, a head portion and a shoulder portion on the head...
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4050771 |
Threaded terminal assembly for dynamoelectric machine
An automotive alternator end frame includes a slotted portion to which a threaded terminal is to be attached. A square shanked bolt is inserted into an insulating grommet comprising spaced washer...
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4020734 |
Tension indicator for fastener means
A tension indicator for use with fasteners such as a cooperating nut and bolt. The tension indicator comprises a pair of washers for placing on the shank of the bolt between the bolthead or nut and...
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3948141 |
Load indicating washer
A load-indicating washer for use in joining two different elements which is capable of visually indicating the tightening force applied against a locking bolt and nut through the indication of...
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3899196 |
Fire hydrant
Flanged upper and lower standpipe sections are connected by a plurality of bolts and frangible powdered metal nuts to form a fire hydrant. Compression washers are disposed between the bolt heads...
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3435724 |
EXPLOSIVE WASHER FOR HIGH TENSION BOLTS
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3405597 |
Tension indicator for fastening means
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3385155 |
Mine roof bolt expansion anchor
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3323403 |
Pre-load indicating washer
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3194105 |
Threaded fastener with tension indicating means
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3187621 |
Fastener assembly and pre-load indicating washer therefor
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3174386 |
Indicating washer
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