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WO2018134108A1 - Rondelle, ensemble de fixation et utilisation de la rondelle - Google Patents

Rondelle, ensemble de fixation et utilisation de la rondelle Download PDF

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Publication number
WO2018134108A1
WO2018134108A1 PCT/EP2018/050613 EP2018050613W WO2018134108A1 WO 2018134108 A1 WO2018134108 A1 WO 2018134108A1 EP 2018050613 W EP2018050613 W EP 2018050613W WO 2018134108 A1 WO2018134108 A1 WO 2018134108A1
Authority
WO
WIPO (PCT)
Prior art keywords
washer
indicator element
indicator
visualization
opening
Prior art date
Application number
PCT/EP2018/050613
Other languages
German (de)
English (en)
Inventor
David Lehmann
Martin Linka
Original Assignee
Fischerwerke Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fischerwerke Gmbh & Co. Kg filed Critical Fischerwerke Gmbh & Co. Kg
Publication of WO2018134108A1 publication Critical patent/WO2018134108A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/028—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load with a load-indicating washer or washer assembly
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/24—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
    • G01L5/243—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed using washers

Definitions

  • the invention relates to a washer with the features of the preamble of claim 1 and a fastening arrangement according to claim 8 and the use of the washer according to the preamble of claim 9.
  • FIGS. 8 and 9 of this patent application show a washer for indicating a clamping force acting in the fastening element of a screw connection.
  • the known washer consists of an outer disc made of steel, on the underside of an indicator element is arranged made of a soft plastic. In a ground state where the washer is not distorted, the indicator member is spaced from the circumference of the outer disk so that it is invisible to a user.
  • the screw head When tightening the fastener, the screw head is pressed against the washer, whereby the indicator member is deformed and pressed radially outward, so that the indicator element for a user visible over the edge of the outer pane protrudes, if a required, well-defined and scheduled to achieve clamping force of the Fastening element or the connection is reached.
  • a plurality of support elements are arranged, which ensure a safe power transmission between the fastening element and the object to be clamped, without a possible creeping of the indicator element impairs the power transmission.
  • the indicator element projects beyond the edge of the outer pane between the support elements.
  • the object of the invention is therefore to propose an alternative washer, in which a reliable reading of the clamping force is possible even under construction site conditions.
  • the washer according to the invention has an axial passage opening for a fastening element.
  • the passage opening in particular has a circular cross-section, so that typical screws, such as those used in steel construction, or anchors, such as those used for fastening in mineral anchoring grounds such as concrete, can be pushed through the passage opening and connected to the washer.
  • the passage opening may in particular be cylindrical, wherein the diameter may also vary in sections, for example, increase or decrease conically.
  • the washer comprises an outer disk, which is made in particular of steel, and an indicator element, which in particular is also disk-shaped. Both the outer pane as well as the indicator element have through holes, which are arranged in particular centrally and in particular concentrically and together form the passage opening.
  • Disc here generally means a body whose radial extent, which is greater than, in particular, many times greater than its thickness, is greater than the longitudinal axis of the through-opening.
  • the disc may be flat or curved in the ground state and may in particular have a circular circumference, but this
  • the outer disk is an outer side and an inner side, and the outer side is the side of the outer disk on which, in a use position in which a fastener is inserted in the through hole, typically a head
  • the inner side is the side of the outer pane facing away from the outer side and typically facing the component with which the washer is to be connected or against which it is to be clamped, against which the indicator element bears in particular directly.
  • the indicator element is made of a material that is slightly and highly deformable, in particular highly elastic deformable compared to the outer pane.
  • the indicator element is in particular made of rubber or a rubber-like plastic, such as a polyester urethane rubber or a Chloroprene rubber known under the trade names Vullcollan, Fibraflex or Neoprene.
  • An indicator element of these or comparable materials can be greatly deformed during clamping, while remaining elastic.
  • the indicator element has a conspicuous color that forms a strong contrast to the outer surface of the outer pane so that it is easily perceived by a user. For example, a reddish Vullcollan indicator element may be used.
  • the indicator element fills in an unstrained ground state of a basic geometry, which occupies a basic volume in the ground state.
  • the basic geometry of the indicator element is hollow cylindrical with an annular cross section, so that the basic volume of the indicator element corresponds to the volume of the annular wall of the basic geometry.
  • the indicator element is arranged on the outer pane such that it is displaced radially outward during deformation of the fastening element by deformation.
  • the indicator element is supported radially on the fastening element.
  • At least one axially projecting support element is arranged on the outer pane.
  • a circumferential, in particular annular support element is arranged.
  • a plurality of support elements may be arranged, which form, for example, sections of a ring.
  • the support element or the plurality of support elements encloses the basic geometry at least partially.
  • the support element or the plurality of support elements encloses the basic geometry completely, wherein the support element or the support elements can be locally broken in the region of a visualization element described below or in the region of a plurality of visualization elements.
  • the support element is arranged in particular on the inside of the outer pane and projects from the inner side in the axial direction.
  • the support element ensures that the outer pane can rest directly on a component without the indicator element interrupting the contact between the outer pane and the component. A possible creep of the indicator element after bracing thus has no negative impact on the power transmission between the washer and the component or the fastener, since the power flow is ensured by the support member.
  • the axial height of the support element is smaller than or same as the axial height of the indicator element in the ground state. This ensures a uniform contact of the indicator element on a component.
  • the support element is integral with the outer pane.
  • the outer pane is produced in one piece with the support element made of steel.
  • the outer disc Due to the design of the support element, the outer disc is not in the ground state on a component, so that the outer disc can be deformed during clamping, especially in the region of a support surface on which a head element of the fastener rests during clamping according to plan, as in the from the support element or of The area enclosed by the support elements under the outer pane creates a cavity in which the indicator element which is soft relative to the outer pane and to the support element is arranged.
  • “Kopfelemen is meant in particular a screw head, but also for example a mother. The force acting in a shank of the fastening element is transmitted to the washer via the head element.
  • the bearing surface is part of the outer surface of the outer pane and is usually adjacent directly to the passage opening.
  • the diameter of the support surface, and thus the diameter of the head element is not greater, in particular smaller than the diameter of the cavity formed by the support element, in which the indicator element is arranged in the ground state.
  • the basic geometry is compressed, whereby the elastic indicator element is pressed radially outward in the direction of the circumference of the washer.
  • the outer pane is in particular designed such that, even if it is deformed during clamping, it does not bear against a component to be fastened when a maximum achievable clamping force of the fastening element is achieved.
  • the deformed part of the washer does not protrude beyond the support element or the support elements in an axial direction directed away from the inner side.
  • the fastener can also be stretched over a maximum achievable clamping force, whereby the outer pane further deformed and the indicator element can be further pressed into the visualization element described below, such that overstretching of the fastener can be displayed with the washer of the invention.
  • the washer according to the invention comprises, as a further part, a perforated disc which is additionally arranged on the side of the indicator element facing away from the outer disc.
  • the perforated disc is in particular a commercial, flat washer, for example a washer according to DIN EN ISO 7093-1: 2000-11.
  • the perforated disk is, like the outer disk, made in particular of steel. In particular, it has a diameter which is greater than the diameter of the outer disk.
  • the indicator element lies in particular between the perforated and the outer pane and directly to these. This has the advantage that the indicator element in this case is not applied directly to the component to be fastened, so that the friction between the indicator element and the parts limiting the basic geometry is independent of the geometry and the material of the component to be fastened.
  • the support element rests against the perforated disk after the clamping, in particular already in the ground state, so that the perforated disk, the outer disk and the supporting element limit and enclose the basic geometry.
  • a deformation of the indicator element takes place solely due to a deformation of the outer pane and / or the support element.
  • the washer has at least one visualization element for indicating the size of the clamping force acting in the fastening element.
  • the visualization element penetrates the outer disk axially to form an axial opening and the support element radially, forming a radial opening into which the indicator element is displaceable during clamping.
  • the radial and axial openings merge into one another, thus forming a common opening.
  • the indicator element is visible when it has been displaced into the radial opening.
  • Axial opening and “radial opening” here do not mean that the opening has to be purely axial or purely radial.
  • the openings may, for example, also run obliquely, curvilinearly or curved to the axial or radial direction.
  • the radial opening extends in particular to the circumference of the washer.
  • the radial opening is limited in particular in the circumferential direction by side walls which guide the indicator element in its radial movement during clamping in the radial opening.
  • Dislaceable does not mean that the indicator element is completely displaced into the radial opening during clamping of the washer or has to completely fill it in.
  • the indicator element is displaced only to a small extent into the radial opening, a large part remains in the cavity, that of the support element
  • the indicator element only partially fills the radial opening in a state that is subject to a planned tension.
  • fastener does not have to be stretched to a certain, well-defined clamping force, but when the fastener to be stretched to a clamping force in a tolerance range between a minimum to reach clamping force of the fastener and a maximum to reaching clamping force of the fastener is located.
  • a predetermined torque which is a measure of a force acting in the anchor bolt clamping force, which must be within a specified tolerance range. It must not fall below a minimum clamping force and a maximum clamping force can not be exceeded, otherwise the carrying capacity of the mounting assembly is not guaranteed.
  • the maximum clamping force to be achieved is less than the breaking force at which the fastener fails. If a washer according to the invention is used when bracing the bolt anchor, the user knows that the bolt anchor is prestressed to a sufficient extent as soon as the indicator element is visible through the axial opening in the radial opening.
  • the first geometry of the first end of the axial opening forms a first marking for indicating the minimum clamping force of the fastening element to be achieved.
  • the washer according to the invention also has a mark for the maximum achievable clamping force of the fastening element to be fastened.
  • the radially outer end of the visualization element is the second mark.
  • the visualization element is formed by at least one axial opening and at least one radial opening.
  • a visualization element but also a plurality of axial and radial openings can be provided, which together form the visualization element.
  • the plurality of openings are radially distributed, for example, with respect to the longitudinal axis of the passage opening, for example, each one opening for a mark.
  • On the washer but also several visualization elements can be arranged. These visualization elements are arranged in particular distributed on the circumference of the outer pane, wherein they are in particular arranged and / or designed such that they each indicate the same clamping force.
  • the openings serving as visualization elements are identical.
  • the visualization element is designed as a slot.
  • slot is meant here an opening that is at least as long as it is wide, where "width of the slot” means the width of the slot.
  • the slot may be elongated, ie longer than it is wide. The slot in this case penetrates the outer pane and the support element.
  • the radial opening has a volume that is less than 15% and greater than 1% of the volume of the basic geometry.
  • the volume of the radial opening is less than or equal to 10%, in particular less than or equal to 8% and in particular greater than or equal to 4% of the volume of the basic geometry.
  • the width of the radial opening In order to ensure the best possible reading quality, the width of the radial opening, with several radial openings, the width of each individual radial opening, less than 10% and in particular less than 6% of the circumference of the washer. In this case, the width of the radial opening is in particular greater than 1% of the circumference of the washer. In addition or alternatively, the width of the radial opening or the width of each radial opening is less than 12 mm, in particular less than 7 mm and / or greater than 1 mm. In particular, the width of the radial opening is greater than or equal to 2 mm and / or less than or equal to 5 mm. The width does not have to be constant over the entire length of the radial opening.
  • the first end of the visualization element in the ground state is spaced from the indicator element.
  • the distance between the visualization element and the indicator element in the ground state ensures that the indicator element is not visible at the beginning of the tensioning in the visualization element, but that only after reaching the minimum achievable clamping force of the fastener, the indicator element is so strongly deformed that it abuts the first end of the visualization element or extends beyond the first end into the visualization element.
  • the support element preferably has a channel which is closed by an outer surface of the outer pane and connects the basic geometry and the visualization element.
  • the indicator element does not completely or completely fill the channel in the ground state, so that the visualization element is objected to by the first end.
  • the indicator element can have projections which already reach the channels in the ground state, which facilitates displacement of the indicator element into the channels. Only after the indicator element completely fills the channel in its length by compression, it is visible in the visualization element during further bracing, so that the user knows that the minimum achievable clamping force of the fastener is reached. In particular, the indicator element completely fills the volume of the channel.
  • the channel may exist in a preferred embodiment in the ground state between the indicator element and the support member, a gap.
  • a gap Through the gap, the indicator element in the ground state is spaced from the visualization element.
  • an annular gap can be provided around the indicator element, which space separates the visualization element from the support element.
  • the visualization element can completely penetrate the support element in the radial direction.
  • the end of the radial opening facing the indicator element has no sharp transitions, such as edges or corners. The transitions are in particular rounded and continuous, so that the indicator element is not damaged when it is displaced by the deformation of the outer pane in the visualization element.
  • the washer according to the invention forms with a fastening element, which in particular has a shaft with an external thread and in particular a spreading element, as is known for example from so-called bolt and sleeve anchors, a fastening arrangement.
  • the diameter of the through hole of the indicator element is selected such that the indicator element rests in particular already in the ground state substantially on the shaft, in particular on the external thread.
  • the indicator element is thus braced against the shank during bracing, in particular against the external thread.
  • the diameter of the through hole of the indicator element is less than or equal to the diameter of the external thread.
  • the visualization element according to the invention is radially displaced so far during bracing that an outer edge of the indicator element has a greater distance from the longitudinal axis, as a first marker for displaying the minimum clamping force to be achieved.
  • the outer pane is axially deformed in the area of a basic geometry, whereby the visualization element is displaced.
  • the outer pane deforms in particular substantially plastically, that is, the deformation of the outer pane in the axial direction, ie parallel to the longitudinal axis of the passage opening, goes back to relax the washer by a maximum of 25%, in particular by a maximum of 20%, in particular by a maximum of 10%.
  • the essentially permanent plastic deformation of the outer pane ensures that the indicator element can be seen permanently in the visualization element after the planned clamping, even if the planned applied tension decreases over time, for example by relaxation, as is the case, for example. or sleeve anchors is known in one Anchoring ground are anchored in concrete.
  • a washer according to the invention which has been clamped with a clamping force which is slightly higher than a maximum to reach clamping force, so that the fastener was not damaged by the bracing, by slightly loosening the fastener to relax so that the elastically deformed indicator element inwardly, back to the cavity, so that it no longer exceeds a mark for the maximum to be reached clamping force.
  • the fastening element has a tool seat for applying a rotary tool for clamping, and that the rotary tool has an outer diameter whose radius related to the longitudinal axis of the passage opening is less than or equal to the distance from the longitudinal axis of the through hole to the first mark such that the turning tool does not substantially obscure the first mark during clamping.
  • the rotary tool has a substantially cylindrical outer contour.
  • the tool seat is in particular an external hexagon, as it is known from nuts and bolts with hexagonal head.
  • the turning tool is, in particular, a socket fitting to the tool seat.
  • the fastener on an M12 screw with a hexagon head of the wrench size 19 has an outer diameter of 29 mm and thus a radius of 14.5 mm.
  • the distance of the first mark to the longitudinal axis is in this case, for example, 15 mm, so that the socket does not obscure the first mark.
  • Figure 1 shows a first washer according to the invention in a plan view of the
  • Figure 2 is a view of the inside of the washer of the invention.
  • Figure 3 is a view of the inside of an alternatively designed washer according to the invention.
  • FIGS. 4a) to 4c) show the use of the first washer according to the invention during bracing of a fastening arrangement
  • FIG. 5 shows the same planned tensioned fastening arrangement in a perspective view
  • FIGS. 1, 2, 4 and 5 show a first washer 1 according to the invention and its use in a fastening arrangement (FIGS. 4 and 5).
  • the washer 1 according to the invention consists of two parts: an outer pane 2 and an indicator element 3.
  • the outer pane 2 is made of steel, with a through hole 4 which is common to a through hole 5 of the indicator element 3 a passage opening 6 of the washer 1 forms.
  • Four slit-like visualization elements 9 for indicating the size of the clamping force acting in a fastening element, which extend radially to the longitudinal axis L of the through-opening 6 and extend to the circumference of the washer 1, are formed on the circumference of the outer pane 2.
  • the visualization elements 9 penetrate the outer pane 2 axially to form an axial opening 7 and a support element 10 radially to form a radial opening 8.
  • the radial openings 8 WGISGPI 6 ⁇ 6 width w of 3 mm, which is less than 1/40 of the circumference of the outer pane 2.
  • the visualization elements 9 penetrate not only the outer pane 2 radially on the circumference, but also partially formed on the inside of the outer pane 2, axially projecting in the direction of the longitudinal axis L annular support member 10.
  • the support member 10 encloses together with the outer pane 2 a cavity 32, in a basic geometry 28 of the indicator element 3 in an unstressed ground state (see Figures 1, 2 and 4a) is arranged.
  • the support member 10 is formed as a circular ring which is interrupted by the radial openings 8.
  • the support member 10 has an axial thickness of 1, 6 mm, which is slightly smaller than the axial thickness of the indicator element 3, which is 2 mm.
  • the indicator element 3 is in the ground state axially over the support member 10 via, as can be seen in Figure 4a.
  • the radial openings 8 of the visualization elements 9 proceed in the direction of the longitudinal axis L into channels 12 which open into the cavity 32 with rounded transitions 29.
  • the channels 12 extend radially over a depth k of 1 mm and are closed to the outer side 13 of the outer pane 2 through an outer surface 14.
  • the indicator element 3 fills the basic geometry 28 and is not distorted, the indicator element 3 does not lie in the channels 12 and does not fill them.
  • the indicator element 3 is thus in the ground state from the first end 1 1 of the visualization element 9, which is formed by the axial and radial openings 7, 8, spaced.
  • the peripheral openings 16 of the visualization elements 9 each form a second end 17 of the visualization elements 9.
  • a gap 15 can be arranged between the first end 11 of the visualization element 9 and the indicator element 3, as can be seen in FIG.
  • the gap 15 also has a depth s of 1 mm.
  • the gap 15 is formed as a circumferential annular gap, through which the first end 11 of the visualization element 9 in the ground state is spaced from the indicator element 3.
  • the indicator element 3 is annular in shape, with the through hole 5 and an outer edge 18. It assumes a basic volume in the unstressed ground state, which in this case corresponds to the volume of a hollow cylinder. The basic volume is selected so that all radial openings together have a volume which corresponds to 6% of the basic volume of the basic geometry 28.
  • the indicator element 3 is made by injection molding of Vullcollan and thus highly elastic deformable even at light pressure.
  • FIGS. 4 and 5 show a fastening arrangement with the washer 1 according to the invention and a fastening element 19, which is designed as a bolt anchor and has a shank 20 with an external thread 21 onto which a nut 22 with an external hexagon as a tool seat 30 is screwed.
  • the fastening element 19, a bolt anchor fischer FAZ II is anchored in an anchoring base (not shown), for which purpose the fastening element is introduced through a borehole 23 in a component 24 into a blind hole (not shown) in the anchoring base and then a spreading element (not shown) was spread.
  • the bolt anchor In order to spread the expansion element according to plan, the bolt anchor must be clamped against the component 24 with a defined, planned clamping force, at least a minimum achievable clamping force and at most a maximum to be reached clamping force of the bolt anchor may act in the anchor bolt.
  • the minimum clamping force is 10 kN and the maximum clamping force 20 kN, wherein the maximum clamping force is less than the breaking force at which the fastener 19 fails, for example by breaking the shaft 20th
  • FIG 4a shows the fastener 19 with the washer 1 according to the invention, after the introduction of the fastener 19 in the borehole 23 and in the anchoring ground in the unstrained ground state, in which the outer edge 18 of the indicator element 3 from the first end 11 of the slot 8 is spaced.
  • the indicator element 3 forms the basic geometry 28.
  • the diameter D D of the through hole 5 of the indicator element 3 is selected such that the indicator element 3 bears substantially against the external thread 21.
  • the diameter D A of the external thread 21 is slightly smaller than the diameter D D of the through hole 5 of the indicator element 3, so that the washer 1 is held clamped on the shaft 20 of the fastener 19 and the indicator element 3 is already supported in the unstressed ground state against the shaft 20 ,
  • the nut 22 deforms the washer 1 in the region of the support surface 25, which is pressed to the component 24.
  • the deformation is essentially plastic.
  • the cavity 32 is reduced and the indicator element 3 compressed, elastically deformed, and pushed along the transitions 29 in the channels 12, whereby the indicator element 3 reaches the first end 1 1 of the visualization element 9 when reaching the minimum achievable clamping force of the fastener 19 ( see Figure 4b).
  • the indicator element 3 From here and during further tightening of the nut 22, the indicator element 3 through the axial opening 7 in the radial opening 8 is visible.
  • the first end 1 1 forms a first mark 26 for indicating the minimum clamping force to be achieved.
  • the radius r of the socket used as a turning tool 31 is selected such that it is smaller than the distance a from the longitudinal axis L to the first marking 26.
  • the socket does not hide the visualization element 9.
  • the user recognizes that the acting clamping force in the fastening element 19 lies between the minimum clamping force to be achieved and the maximum to be achieved Clamping force and the fastener 19 is thus clamped according to plan. If, on the other hand, the outer edge 18 can not be seen in the radial opening 8, then the minimum clamping force to be achieved has not yet been reached - the fastening element 19 must continue to be tensioned.
  • the washer 1 a user can easily read whether a fastener 19 is braced according to plan or not.
  • the washer 1 also consists of few parts and is inexpensive to produce as a mass product.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

L'invention concerne une rondelle (1) comprenant une ouverture de passage (6) axiale pour un élément de fixation (19), la rondelle (1) comprenant un disque extérieur (2) et un élément indicateur (3) qui, dans un état de base non contraint, présente une géométrie de base (28) et qui est disposé de telle sorte que l'élément indicateur (3) est déplacé radialement vers l'extérieur par déformation lors du serrage de l'élément de fixation (19). Au moins un élément d'appui (10) faisant saillie axialement est disposé sur le disque extérieur (2), élément d'appui par lequel la rondelle (1) s'appuie sur une pièce (24) lors du serrage. L'invention vise à lire de manière sûre la force de serrage lors du serrage. À cet effet, la rondelle (1) comprend au moins un élément de visualisation (9) servant à indiquer l'amplitude de la force de serrage agissant dans l'élément de fixation (19), lequel élément de visualisation travers le disque extérieur (2) axialement en formant une ouverture axiale (7) et traverse l'élément d'appui (10) radialement en formant une ouverture radiale (8).
PCT/EP2018/050613 2017-01-17 2018-01-11 Rondelle, ensemble de fixation et utilisation de la rondelle WO2018134108A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102017100833.0 2017-01-17
DE102017100833 2017-01-17
DE102017106166.5 2017-03-22
DE102017106166 2017-03-22

Publications (1)

Publication Number Publication Date
WO2018134108A1 true WO2018134108A1 (fr) 2018-07-26

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WO (1) WO2018134108A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3715648A1 (fr) 2019-03-25 2020-09-30 fischerwerke GmbH & Co. KG Système de serrage, utilisation d'un disque de serrage et procédé de précontrainte d'un élément de fixation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096716A (zh) * 2020-09-10 2020-12-18 李沛 开口形带合金钢刀头的反螺旋尖锥式止动弹簧垫圈

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153974A (en) * 1961-04-26 1964-10-27 Western Electric Co Method of and device for indicating a predetermined pressure exerted by a fastener
GB2120795A (en) * 1982-05-06 1983-12-07 Priest And Sons Ltd Benjamin Load-indicating washer
US20150125234A1 (en) * 2012-05-07 2015-05-07 Applied Bolting Technology Direct tension indicating washer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153974A (en) * 1961-04-26 1964-10-27 Western Electric Co Method of and device for indicating a predetermined pressure exerted by a fastener
GB2120795A (en) * 1982-05-06 1983-12-07 Priest And Sons Ltd Benjamin Load-indicating washer
US20150125234A1 (en) * 2012-05-07 2015-05-07 Applied Bolting Technology Direct tension indicating washer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3715648A1 (fr) 2019-03-25 2020-09-30 fischerwerke GmbH & Co. KG Système de serrage, utilisation d'un disque de serrage et procédé de précontrainte d'un élément de fixation

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