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| Number | Title | Issue Date |
| 7857562 | Direct tension indicating washer having enhanced emission of indicating material A direct tension indicating washer including a first surface having a protuberance formed thereon; a second surface having an indentation formed opposite the protuberance; an indicating material positioned in the indentation; and a channel leading from the indentati... | 12/28/2010 |
| 7635243 | Load indicating fastener and method of manufacture A load indicating fastener comprising a load indicator and a fastener body. The load indicator comprises an annular body defining a through hole having a minimum diameter and a plurality of protuberances integral with a first face of the annular body and a correspon... | 12/22/2009 |
| 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 mechanism determines axial loading by measuring the amount of deflec... | 01/06/2009 |
| 7350419 | Control device for non-positive connections The invention relates to a control device for non-positive connections, especially screw connections. The device includes two force application elements and a measuring element arranged therebetween. The measuring element is at least partially provided with a layer ... | 04/01/2008 |
| 7326017 | Fastening element, washer and fastening means therefrom The present invention relates to a fastening means (10; 110) consisting of a fastening element (11; 111) and a washer (20; 120), the washer (20; 120) being held on the fastening element (11; 111) in a rotatable and captive manner. ... | 02/05/2008 |
| 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 adapted to cooperate with an object to be assembled or disassembled, ... | 04/24/2007 |
| 7198445 | Washer with crush zone A conical washer having a crush zone wherein the inner annular projection comprises a top and bottom elevation where the top elevation lies at an approximately 100 to 165 degree angle to the inner annular wall of the washer and the bottom elevation is substantially ... | 04/03/2007 |
| 7156595 | 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 mechanism determines axial loading by measuring the amount of deflec... | 01/02/2007 |
| 7125213 | Washer, fastener provided with a washer, method of and power tool for fastening objects A washer has a body having an axis and provided with a first bearing face surface located at one axial side and adapted to cooperate with a nut, a second bearing face surface located at an opposite axial side and adapted to cooperate with an object, at least one thi... | 10/24/2006 |
| 7066053 | Washer, fastener provided with a washer A washer which has a body having a first bearing face surface at one axial side and adapted to cooperate with a nut, a second bearing face surface at an opposite axial side and adapted to cooperate with an object, at least one third turning resistant surface adapted... | 06/27/2006 |
| 7056053 | Bolting arrangement including a two-piece washer for minimizing bolt bending A two-piece washer to allow tilting movement of the washer elements. One annular washer element includes a convex annular surface that engages with a concave annular surface of a second annular washer element. When the convex and concave surfaces of the respective w... | 06/06/2006 |
| 7044426 | Fitting for building structures and the like A fitting to prevent movement during seismic activity between a building structure or the like and a rod and channel support or the like connected to said building which may include anti-torque means between the anchor and the channel for preventing rotation of the ... | 05/16/2006 |
| 7021153 | Measuring device A measuring device (1; 21; 33) for controlling an installation torque of a fastening element (4; 32) and securable to engagement means (3; 35) of the fastening element (4; 32), includes an indicator (5; 24) for a visual display of ... | 04/04/2006 |
| 7014404 | Nut member with tightness-indicating protrusions and loosening-preventing recesses A nut member has first and second end faces and corners, and is formed with a plurality of protrusions, each of which is disposed at a respective corner and each of which has a lateral inner face that extends from the second end face, and a plurality of recesses, ea... | 03/21/2006 |
| 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 the free end of the bolt so as to abut against the washer, a power t... | 01/17/2006 |
| 6962591 | Device for postoperative fixation back into the cranium of a plug of bone removed therefrom during a surgical operation A device for rapid reattachment of a bone flap to a cranium after a surgical operation is provided. The device comprises a pin comprising an elongated shaft, an inner disk and an outer disk. At least the outer disk comprises a central bore. The pin and inner disk ar... | 11/08/2005 |
| 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 rocker arm. The support device supports the rocker arm having a support... | 03/30/2004 |
| 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 compression force on the washer is equal to the tension of a bol... | 07/30/2002 |
| 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 washer not subjected to axial force. In a preferred embodimen... | 06/26/2001 |
| 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 conjunction with loading the device. The device itself ha... | 10/24/2000 |
| 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 load ring portion and a boss portion with the boss portion ad... | 08/01/2000 |
| 5931618 | Direct tension indicating washers A direct tension indicating and maintaining washer has a first surface having at least one protuberance formed thereon and a second surface having at least one indentation formed therein opposite the protuberance. The inner diameter of the direct tension ... | 08/03/1999 |
| 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 plastic collar includes a ring which is disposed between the nut... | 07/27/1999 |
| 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 washer is subjected to a predetermined compressive load (2... | 03/23/1999 |
| 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.... | 03/16/1999 |
| 5769581 | Direct tension indicating washers A direct tension indicating and maintaining washer has a first surface having at least one protuberance formed thereon and a second surface having at least one indentation formed therein opposite the protuberance. The inner diameter of the direct tension ... | 06/23/1998 |
| 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 least one integral arm whose position is indicative of faste... | 03/03/1998 |
| 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 protuberances, struck and partially sheared from the annular b... | 09/16/1997 |
| 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 nut provided for fixing is tightened, then the resultant axi... | 12/24/1996 |
| 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 indentations in the annular body which are formed when the p... | 01/30/1996 |
| 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 on the screw portion. The clamp includes a nut meshed with... | 09/05/1995 |
| 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 between the nut and the elements or the bolt head and the ele... | 01/31/1995 |
| 5370483 | 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 indentations in the annular body which are formed when the p... | 12/06/1994 |
| 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 indicator device is mounted under the head of a threaded f... | 02/23/1993 |
| 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 advantageous in use a free space is formed by at least one ... | 02/18/1992 |
| 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 member initially rotate as a unit to mix resin components that... | 11/12/1991 |
| 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 in the annular body which are formed when the protuberanc... | 05/14/1991 |
| 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 generally flat, round shape and a joint portion interconnectin... | 01/29/1991 |
| 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 will withstand a predetermined torque but will collapse at ... | 09/04/1990 |
| 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 longitudinal axis, opposite ends, an outer surface and a cent... | 12/26/1989 |
