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WO/1992/013203A1 |
A hollow bolt (10) contains first and second electrical contact elements (13, 16) which are moved apart when the bolt is subjected to a predetermined tensile load. A carrier (14) for a first of the contact elements contains an inductor (...
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WO/1992/008903A1 |
A failure indicating device wherein a fluid is encased within a bore in a fastener. In another embodiment of the invention, the fluid (14) is encased within a thin walled capsule (12) which in turn is encapsulated within a bore in the fa...
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WO/1992/004514A1 |
To prevent damage in making a sleeve joint - primarily for reinforcing rods - and improve the static and dynamic bearing strength of the joint, the sleeve (1) has a gradually rising profile in the end regions (3) for the jointing of meta...
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WO/1992/003665A1 |
A load indicating member (25) and load indicating fastener (10) are disclosed and claimed. An ultrasonic transducer (19), grown on one surface (15) of a load bearing member, such as a fastener, is used to determine the length, stress or ...
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WO/1992/003262A1 |
A torque-limiting driving socket for a nut or bolt comprises a socket portion (4) which receives the nut or bolt head and a hexagonal driving portion (6) for engagement with a spanner or wrench. The driving portion (6) is connected to th...
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WO/1992/003666A1 |
A fastening device has a pin-shaped fastener (1) having an axis, and a unit for tightening and loosening the fastener (1). The tightening and loosening unit includes one element (2) provided with first connecting means for connecting the...
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WO/1991/019909A1 |
The present invention relates to a fastening device, primarily for affixing a preferably expansive thin-walled element (3) to a preferably likewise thin-walled component (4), comprising at least one screw (1) with a shank (10) and a head...
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WO/1991/018213A1 |
A pre-load indicating washer (40) in which a plurality of protuberances (44), struck and partially sheared from the annular body (42) of the washer (40), are pushed under load back into a corresponding plurality of indentations (48) in t...
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WO/1991/011632A1 |
A self-drilling screw (3) for securing, for example, wooden parts (2) to sheet metal, in particular wooden edge planks to roof framework metal plates, has a shank (4) with a drilling point (5) at one end and a driving section (7) at the ...
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WO/1991/011633A1 |
A composite threaded collar (10) is fabricated from a panel (30) consisting of multiple layers (60, 62, 64, 66) of fiber reinforced tape, bonded together to form a rigid composite structure. The tape comprises a plurality of longitudinal...
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WO/1991/008398A1 |
A load indicating fastener such as a bolt (10) or stud, has a shank (12) which is subject to tensile loading in use. The shank (12) has an axially extending bore (22) which receives a first gauge pin (30) anchored at its inner end (32) t...
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WO/1991/003609A1 |
A fastener/plate assembly (10) for fastening material to a roof deck (18) employs a threaded fastener (14) having a shank (46) with two thread sections (44, 48). The distal end portion (42) of the shank (46) has a thread (48) which is lo...
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WO/1991/001484A1 |
For indicating when the tension in a bolt reaches a predetermined value, there is provided an electrical contact (24) which is held in a position adjacent to an axially facing surface (20) of the bolt and in a fixed position relative to ...
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WO/1990/015259A1 |
The invention is a flush head fastener (14) for joining two or more structural elements (10, 12) together. The structural elements have a fastener hole (18) therein with one of the structural elements (10) being countersunk to accommodat...
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WO/1990/013753A1 |
A fastening apparatus is provided wherein the length of a mating threaded connection between two members (60, 64) is limited as a function of an effective differential pitch to the uniform pitch of the threads (61, 63) on both members (6...
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WO/1990/010798A1 |
In an indicator for visually displaying extremely small displacements between two points within a structure, a change of color visible through an indicator window (26) occurs during a preselected portion of a predetermined displacement w...
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WO/1989/005713A1 |
A tool for transmitting torque from a wrench to a nut has a socket component (10) and a sensing element (17) which projects along the interior of the socket component into engagement with the head of a pin (16) mounted in an end portion ...
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WO/1989/003026A1 |
A clamp (50) for use in testing machines to prestress a joint between a driving shaft (30) and a driven shaft (20), both of which carry portions (22, 32) which are externally threaded with each shaft having a flat surface (36, 38) abutti...
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WO/1989/002807A1 |
A hydraulic nut (20) for tensioning a bolt (232) is disclosed having a stepped annular piston (22) slidable within a housing (21) for reducing the complexity of manufacture. The locking collar (27) is threaded to the housing (21) on a bu...
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WO/1988/008088A1 |
Attainment of a predetermined stress in a bolt (10) which is being tightened is indicated by interference with the freedom of a pin (15) to rotate relative to the bolt. The pin extends along a bore (14) from an end of the bolt and the bo...
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WO/1988/002074A1 |
An expansion bolt especially for use in flanged couplings in drive shafting comprises a bolt having a tapered shank (7) and a cylindrical sleeve (10) having a complementary internal taper, the sleeve (10) being provided with a pair of di...
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WO/1987/007089A1 |
A screw-coupled connector comprises two coupling parts which are capable of being secured together by the rotation of an internally screw-threaded nut (3) carried on one of the parts, in which the said part includes a sleeve (6) which is...
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WO/1987/005976A1 |
An installation system for securing workpieces (12, 14) of composite type materials and including a fastener (10) adapted to be located in aligned bores (34, 36) in such workpieces with a preselected interference fit, with the fastener c...
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WO/1987/005977A1 |
Six lobes (22) of a nut have axial surfaces falling on six tangent cylinders (28) of equal radius and having axes lying on a right cylinder concentric (32) with the axis of the nut. The surface of a second concentric right cylinder havin...
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WO/1984/003741A1 |
The dowel (14) is provided with a slotted expansion shell (20) which may be drawn by at least one expansion body (26) engaged into the inward end of the hole, preferably by two expansion bodies (26, 28) engaged into the inward end of the...
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WO/1984/002753A1 |
A security nut comprises a hexagonal sided head (2) connected to a body portion (1) by a frangible neck (3) of reduced diameter. On tightening up past a given torque head (2) breaks off or may be snapped off to prevent the body portion (...
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WO/1984/002577A1 |
The method for measuring strains in a part uses the reflection of an acoustic wave, while measuring a transit time of said wave by means of an apparatus which measures the fade-in time of an echo coming from an interface. The method comp...
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WO/1981/002917A1 |
A system and method for fixedly securing a roller side bearing to the top surface portion of a rail car truck assembly. Elongated threaded fasteners (60) pass through registered openings (50, 80) in a bearing cage bottom wall (42) and tr...
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JP7470758B2 |
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JP2024050061A |
An object of the present invention is to provide a metal anchor that can stably detect tensile loads that exceed expectations by detecting elongation that occurs in an anchor bolt. [Solution] A metal anchor 10 fixed to a concrete body C,...
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JP2024050062A |
[Problem] To enable a manager to accurately grasp how much load is applied to an anchor bolt. [Solution] In order to support and fix the fixed object S, it is provided on a metal anchor 10 fixed to a concrete frame C, and the amount of e...
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JP2024043672A |
The present invention has a simple structure that does not require an external device, and uses the bolt fastening action to heat the bolt during fastening. A fastening method for threading a bolt into a nut is provided. The bolt has a h...
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JP2024044946A |
An object of the present invention is to prevent damage to a mechanical system due to loosening of bolts or over- or under-tightening of bolts. [Solution] The axial force of the bolt, which is normally invisible from the outside, is disp...
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JP2024030876A |
An object of the present invention is to provide a loosening detection device that can suitably detect the loosening of a screw member. A board 100 provided with an acceleration sensor 110 is fixed to a ceiling surface 32 of a nut cap 30...
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JP7431662B2 |
To provide an axial force calculation device which can easily, highly accurately and repeatedly measure the axial force in which an error due to an eccentricity is reduced in a non-contact manner for a long period even if there is the ec...
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JP2024017088A |
An object of the present invention is to provide a fastening member in which a relatively large detection device can be installed. [Solution] A cylindrical portion 22 formed on the side opposite to a seat surface 21b of a nut body portio...
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JP7427220B2 |
To allow for detecting a load acting on an anchor bolt of a metal anchor fixed to a concrete skeleton and notifying an administrator of information based on a detection result.A load detection device 16 provided on a metal anchor 10 fixe...
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JP7424925B2 |
To provide a wheel nut cap free from a risk of falling of an indicator, and capable of being used without the indicator according to the selection of a user.A cap main body having a circular opening at a bottom surface, and provided with...
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JP2023553249A |
The present invention is a nut device comprising a body having first and second faces connected by an outer wall and a central threaded opening having internal threads for engaging an elongated fastening member; a deformation measuring d...
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JP7401817B2 |
This loosening detection sensor 5 detects loosening of a bolt 4 and a nut 6 which are for fixing components 1, 2, the loosening detection sensor 5 comprising an insulating layer 5b and a first conductive layer 5a and a second conductive ...
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JP7398788B2 |
To provide a metal anchor that when a load that causes remarkable elongation is applied to an anchor bolt, can detect the fact visibly.A metal anchor 10 that is fixed to a concrete skeleton C, comprises: an anchor bolt 11 having a loose ...
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JP2023550207A |
The clamp element (1) comprises a clamp body (2), such as a screw, with an ultrasonic sensor (31) fixed to the head. The sensor (31) uses ultraviolet light propagating along the shaft (23) of the screw between two flat and parallel base ...
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JP7370855B2 |
To reduce cost and facilitate execution in a device that detects looseness of a rotating fastener when the rotating fasteners have different size.A looseness detection device comprises: a mediation member having an engagement part that i...
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JP7364941B2 |
A looseness detection sensor for detecting looseness of a bolt for fixing a component, including: a resonance unit arranged adjacent to a head portion of the bolt and made of an insulating material confining a high-frequency signal input...
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JP7360322B2 |
To prevent accuracy deterioration of abnormality detection even in a case where a surface of a structure is uneven.An abnormality detection sensor forming method comprises a first step of fixing an RFID unit including a pair of terminals...
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JP7360338B2 |
To provide a tool capable of easily and accurately pasting a slackness detection sensor along the side face and seating face of a fastener.A pasting tool for a slackness detection sensor comprises a pair of levers, a fastener receptor, a...
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JP2023138073A |
To provide fastening structure that allows a worker to easily understand that fastening has been completed with an appropriate tightening torque.Fastening structure 10 comprises: a fastening member 20 that is fastened to a mounting membe...
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JP2023134095A |
To provide a screw capable of efficiently performing work of fastening and fixing an article to be fixed with proper fastening torque, and performing adjusting work of screw fastening.A screw is equipped with a screw portion 2 screwed in...
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JP2023540845A |
The present invention relates to a multi-jackbolt tensioner and method of using the same. The present invention alleviates some of the problems associated with currently available multi-jackbolt tensioners.
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JP2023124078A |
To allow for wireless diagnosis of fasteners over a communication distance on the order of meters.A washer device 1 is assembled to at least one side of a head 32 of a fastening bolt 31 and a nut 33. The washer device 1 has: a washer sec...
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