Abstract: A rivet may include a pin comprising: a threaded portion (36), a shank (38) and a head (40); and a bushing (32) comprising an essentially cylindrical body, said body comprising a deformation zone designed to form an external bulge (80); a collar (70) designed to receive the head of the pin; and a tapped portion (66) designed to engage with the threaded portion of the pin. The shank (38) of the pin comprises a first cylindrical portion (44) and a second cylindrical portion (46) connected by a shoulder (48), the first portion being adjacent to the head and having a first diameter, the second portion being adjacent to the threaded portion and having a second, smaller diameter.

Abstract: A blind rivet having sealing and water-tightness features. The blind rivet is fastenable to a member having an opening and includes a rivet body and mandrel. The rivet body has a flange having a large diameter, a taper portion which is adjacent the flange and a sleeve which extends along the axial direction from the taper portion. A hole having a bottom is formed from the surface of the flange to the bottom of the sleeve. The mandrel has a head. The head of the mandrel is disposed at the bottom portion of the hole. A thick portion is formed at a portion of the sleeve, and thus the head is irremovably held in the hole. The mandrel is pulled, the sleeve is enlarged, and a substrate is sealed between the enlarged portion and the flange. A sealing structure using the blind rivet is also provided.

Abstract: The invention could be a repair system and method for re-securing doors to their respective door frames when a screw fastener that originally used to secure the door to the respective door frame no longer engages and secures to the screw fastener's original screw hole in the door or frame, comprising a fastener anchor comprising a double open-ended hollow cylinder having a threaded exterior side and a hollow interior, the hollow interior forming a threaded lengthwise center channel that is continuously connected to the two open ends, one open end being tapered while the remaining other open end being shaped to receive a portion of a rotating instrument; a securing fastener having a threaded portion that can removably engage the threaded lengthwise center channel; wherein the threaded exterior side is capable of engaging and securing to the respective screw hole after the screw hole has been enlarged.

Abstract: An expandable fastener provides a fastener having a hollow tube in fluid communication with a flexible membrane forming a bladder around the tube. After the tube is inserted into the panel the bladder is filled with a curable fluid such as an expanding foam, which inflates the bladder against the rear surface of the panel. When the fluid cures it forms a substantially inflexible retaining block that contacts the panel over a large surface area, distributing any longitudinal pulling force applied against the fastener over a broad area of the panel to improve resistance to dislodgment and minimize panel failure.

Abstract: The invention relates to a rock anchor including an elongate, hydraulically inflatable anchor tube made of a ductile material and defining a closed leading end, a trailing end, and a tube cavity extending between the ends. The rock anchor of the invention includes an end cap on a trailing end of the tube, defining a feed aperture in communication with the tube cavity for pressure feeding a liquid substance into the tube cavity for inflating the tube. The end cap includes pressure indicator means configured for indicating when, as a result of pressure feeding of a liquid substance into the tube cavity, a predetermined installation pressure is reached in the tube cavity. The pressure indicator means typically includes a pressure indicator formation displaceable under pressure in the tube cavity, with such displacement being visible from the outside of the end cap.

Abstract: A friction tube anchor has a tube (1) which can be expanded under the action of a pressurized medium and which is attached to a casing (6). The casing (6) is screwed into a section (13) of a casing-like sleeve (7) which is provided with a thread and is sealed by ring packing (11) relative to the inside of the section (13). The casing-like sleeve (7) has another section (14) which is provided with a thread and in which selectively either another expandable tube (1), or an adapter for feeding the pressurized medium for expanding the tube (1), or a fastening bolt, for example an eye bolt, can be screwed.

Abstract: The invention relates to a fixing clip for joining two superimposed flat components each having one penetration in alignment with the other. The fixing clip is characterized by a mounting part with two arms for contact with the upper component and an expanding part attached to the mounting part for spring-loaded engagement of the lower component, wherein the mounting part with the expanding part forms a hole passage in alignment with the penetrations and the mounting part receives a cap screw, wherein said cap screw penetrates the two penetrations and the hole passage with a threaded shank and is adapted with its head between the two arms to engage the arms both in a pre-assembly position and also in a holding position. As the screw is screwed into the hole passage and as the expanding part expands, the screw transitions out of the pre-assembly position into the fixing position, in which the threaded shank holds the expanding part in its expanded position and presses the two components together.

Abstract: Hydraulically assisted fastener (10) comprises a body (11) with a central bore (12) to engage a connector element (20) and with an annular recess (14) opening outwards to an end surface (15). Annular thrust member (17) fits into and seals the recess (14). Charging medium (50) is injected under pressure into annular chamber (30) defined by recess (14) and member (17) and moves body (11) relative to member (17) to tension element (20). Medium (50) sets in chamber (30) to maintain the tension in element (20). Element (20) may be a bolt or stud, body (11) can be a nut and member (17) can be a plan washer. Medium (50) can be a curable viscous paste, a suspended solid in a self-setting compound or a particulate solid which behaves as a fluid. Suitable materials include graphite, and lead, copper or steel balls.

Abstract: A hydraulic tensioning system for nuts on studbolts has a puller bar and a puller buddy, which are coupled to the studbolt, and a bridge around the nut. The puller bar is internally coupled to the studbolt (and may engage the nut before the tension is applied). The nut can comprise a cone nut, which cooperates with a complementary collar or shell with a conical inner face and a spherical base washer.

Abstract: An explosive assisted fastener for joining steel framing members. The fastener is comprised of an integrally formed member having a head section, a stem section and a tip section, such that the head section is disposed at a first end of the stem section and adapted to be linearly driven by a driving device into the framing members, and the tip section is disposed at a distal second end of the stem section and adapted to penetrate the framing members. The fastener further includes an explosive material embedded in the tip section of the fastener. In operation, the fastener is driven through the framing members until the head section of the fastener seats against an outer surface of the framing members. Once driven into place, the explosive material residing in the fastener is detonated, thereby radially expanding the tip section of the fastener and preventing removal of the fastener from the framing members.

Abstract: A tote bin seal for securing sheet material lids via aligned lid apertures includes a flange forming an ID flag attached to a locking device having a hollow core body at one body end and two semi-circular arrays of tangs at the other body end, the tangs formed of stems and reverse hooks or barbs. The body is somewhat oval with a rectangular central portion, the tangs depending from each arcuate end of the oval. Each of the tangs and the body have an interior axially extending triangular stiffening rib. An insert with a head and a bifurcated shank is attached to the flange opposite the body and may be sheared from the flange for insertion into the body core. The shank forms a locking opening which captures a web in the body core for securing the insert locked to the body. The insert prevents the tangs from compressing inwardly to open the seal. The flange has a living hinge so it can be folded over to permit reading ID data from the flange in stacked bins.

Abstract: A tube-formed rock bolt is expandable into contact with the wall in a bore hole without stretching the periphery of the rock bolt. The rock bolt has an elongated tube (12) with a closed cross section. The tube is provided with a longitudinal depressed part (13). End pieces (14, 24) are secured to the ends of the tube, and the end pieces are provided with axial channels (15, 35) having peripheries which provide a seal resulting from deformation of material when the rock bolt is assembled by joining together different sections. By connecting one end (30) of the assembled rock bolt to a high pressure pump (39), the entire assembled rock bolt can be expanded at the same time.

Abstract: A tubeformed rock bolt having a closed cross section includes a tube (11) provided with a longitudinal depression (12). First and second sleeves are provided at the ends of the tube, and the sleeves are welded to the tube so that a closed compartment is formed. The second sleeve has a radial groove for providing a desired angular position to the rock bolt and a tool used for setting the bolt, and a first hole for injection of cement. The tube is additionally provided with a second hole near a first end for venting the closed compartment.

Abstract: This invention relates to a relesable attaching apparatus for attaching a portion of a first object to a portion of a second object. The attaching apparatus has an attaching member with walls defining a cavity therein. A rapidly expanding material is placed within the cavity such that when the material is caused to expand, the attaching member will break at a failure zone located adjacent to the cavity. The rapidly expanding material is a composition that undergoes a phase change from a solid to a liquid, wherein the volume of the liquid is larger than the volume of the solid. In operation, an initiator triggers the phase change which causes a pressure build-up in the cavity, thereby loading the attaching member and causing it to break at the failure zone. Accordingly, the first and second objects are freed from one another.

Abstract: A parts fastener has a body having at one of its ends a flanged head projecting from the body. For that purpose the body evinces a central cavity communicating with the outside and includes at least a wall portion of which the inner side bounds part of the cavity, and which elastically deforms under an external force applied to the wall portion. The wall portion has, on its outer side, a projection which together with the head flange bounds a jaw by means of which the fastener may be inserted into the part to which it must be affixed. The projection opens on account of the deformation of the wall portion and frees the part and the fastener from each other. The device may also include means to cause the deforming force from the outside.

Abstract: A releasably anchorable bushing conduit apparatus for providing access through a wall having a generally accessible side and a generally inaccessible side and an opening extending through the wall from the generally accessible side to the generally inaccessible side comprises a bushing conduit having first and second opposite end portions with first and second coterminous openings therein. The bushing conduit is insertable into the opening such that the first end portion protrudes from the wall on the inaccessible side and the second end portion protrudes from the wall on the accessible side. A retaining device external to the first and second coterminous openings retains the bushing conduit in place, yet presents no obstruction to the first and second coterminous openings.

Abstract: A method of securing a cylindrical centering pin for a nuclear fuel assembly in a bore formed in a plate includes introducing an end of the centering pin into the bore until at least part of a coaxial, radially expandable wall portion of the end to be secured protrudes beyond the plate; and generating pressure in a closed hollow space surrounded by the wall portion with a pressure fluid until the wall portion radially expands and anchors the centering pin. According to another method, the end is introduced into the bore until at least part of the end to be secured, which has a periphery and an interior with radial slits formed therein, protrudes beyond the plate; and a mandrel-like tool is partially brought into the slits in the interior of the end of the centering pin and radially expands the end of the centering pin with the tool for anchoring the centering pin.

Abstract: A method for joining carbon-carbon structural elements together using a carbon-carbon pin type fastener for transfer of shear loads. A coating of powdered metal which undergoes a large expansion when reacted in the presence of a gas is used to coat the outer surfaces of a pin which extends through the structural elements to be joined, with the powdered metal coating between the body of the pin and the surfaces of the structural elements through which the pin passes. After installation through the structural elements the pin is heated in an oxygen atmosphere causing the powdered metal coating to expand up to 100% from its unheated volume binding the pin to the structural elements. A fluted or scalloped edge on the pin increases the surface area of the pin increasing its friction holding force.

Abstract: The fastening together of structural elements formed from carbon-carbon is accomplished by a fastener constructed from 2-D or 3-D carbon-carbon in the form of a high angle helical threads on one end and a countersunk head with a carbon-carbon central insert on the other end with the threaded end inserted through the carbon-carbon structural elements to be joined. A metal is painted on the threads and the shank on the fastener. A collar formed from carbon-carbon is fitted over the course threaded end of the fastener with the distal end of the threads extending therefrom. While passing a heating current through the fastener, the head and the collar of the fastener are forced together. The fastener is heated to an elevated temperature in the presence of an Oxygen gas cover which causes the powered metal to expand up to 100% binding the fastener to the carbon-carbon components, collar and insert.

Abstract: An expansion bolt, adapted to be anchored in a hole, having a hollow shank portion adapted to hold a pressurizing fluid and to expand girthwise on pressurization of the fluid, and further having a threaded portion adapted on insertion of the shank portion in the hole to extend out of the hole and to have a nut threaded thereon, whereby, following insertion of the shank portion of the bolt, in an unexpanded condition, in the hole, the shank portion may be expanded by pressurization of fluid therein for anchoring it in the hole and the nut threaded up on the threaded portion of the bolt.

Abstract: A pyrotechnical dowel has a shank and a deformation chamber located at the forward end of the shank. The chamber contains a blasting cap. Triggering of the blasting cap takes place from the rearward end of the shank by means of a triggering tool which is introduced into a longitudinal duct within the shank and which comes into direct contact with a bottom of the blasting cap.

Abstract: A rock bolt in the form of a steel tube (11) is placed in a borehole in rock and is then expanded against the rock by means of an expandable body (15) inside it. The expandable body (15) comprises a rubber hose which is temporarily pressurized to a pressure that is usually 50-100 MPa so that the bolt anchors in the borehole. The expandable body (15) is part of a mounting tool and it is withdrawn immediately when depressurized.

Abstract: A dowel assembly to be anchored in a borehole in a receiving material includes a container positioned around the axis of the borehole and located between an abutment at one end of the dowel assembly and the receiving material into which the assembly is inserted. The container is formed of two parts with one part being telescopically displaceable into the other. An hydraulic mass capable of expanding when mixed with a reaction liquid is filled into the container. The expandable hydraulic mass maintains the force acting on the dowel assembly when there is relaxation of the force originally generated between the dowel assembly and the receiving material. The container has openings through which the reaction liquid can pass into contact with the hydraulic mass. The hydraulic mass can be activated by immersing the container in water.

Abstract: An expandable inflatable circular plug for sealing one of the blind bore holes which are located in a reactor vessel body flange of a nuclear reactor and which are used to fasten the reactor vessel head to the reactor vessel body by means of bolts passing through corresponding bores in a mating flange on the reactor vessel head.

Abstract: An expansion bolt, adapted to be anchored in a hole, having a hollow shank portion adapted to hold a pressurizing fluid and to expand girthwise on pressurization of the fluid, and further having a threaded portion adapted on insertion of the shank portion in the hole to extend out of the hole and to have a nut threaded thereon, whereby, following insertion of the shank portion of the bolt, in an unexpanded condition, in the hole, the shank portion may be expanded by pressurization of fluid therein for anchoring it in the hole and the nut threaded up on the threaded portion of the bolt.

Abstract: A tube-formed rockbolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fitting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.

Abstract: A rock bolt comprises an inflatable tube (11) which has a deep longitudinal depression (12). A wire coil (20) is mounted on the tube before the bolt is inserted in the borehole. When pressurized by high pressure water the tube (11) expands and clamps the coil (20) between itself and the borehole and the tube (11) is thereby permanently anchored in the borehole. The depression (12) develops during the expansion but the coil (20) prevents full expansion of the tube (11).

Abstract: A tube-formed rockbolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fitting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.

Abstract: A tube-formed rockbolt is partly circular in its cross-section and opposite its circular portion (12) it has a deep depression (16-18). Its ends are sealed and its outer end has a hole (44, 45) or a fitting (24) through which the bolt can be supplied with high pressure water that expands the tube to anchor it in the borehole.

Abstract: A rock bolt is manufactured from a steel tube which has been deformed to have a deep depression so that it assumes a substantially reduced diameter. A sleeve is pressed onto the outer end thereof which is sealed through welding. An installation chuck carried on an installation rod comprises a socket for receiving the outer sleeve and when the rock bolt has been manually inserted in a borehole, for example by means of the chuck, high pressure liquid is conveyed through passages in the chuck to a hole which leads through the sleeve to an interior chamber of the tube so that the tube expands through plastic deformation, thereby anchoring the rock bolt in the borehole. The chuck is then relieved of pressure and removed from the anchored rock bolt.

Abstract: A mounting element for supporting an object to a support structure consists of an anchoring part, an intermediate part and an extension part which is in engagement with the object to be fixed. The anchoring part is surrounded by a sheathing in which binding material is injected so as to fill out a hollow space in order to anchor the mounting element. The intermediate part is provided with an internal portion having a sealed bore hole in which a screw is penetrating after the binding material is hardened and the feed device is withdrawn. Through inserting a sleeve into the extension part which achieves a bracing of the object.

Abstract: A novel blind rivet is provided wherein the blind head is upset by a pin driven from the exposed side into a core of soft metal contained by a closed tube end which is selectively thinned to result in controlled deformation due to the internal pressure created by compressing the soft core. The closed tube end upon expanding to a predetermined shape is transformed into the blind head.This rivet offers high strength, leak-free joining. Consistant controlled snug fitting assembly is offered. The rivet is suited to installation by a tool that prevents forming loads from being transferred to the members being joined. Moreover, the rivet has lower weight and cost while providing a smoother exposed surface than prior art blind rivets.