CA2141750A1 - Expansion bolt - Google Patents
Expansion boltInfo
- Publication number
- CA2141750A1 CA2141750A1 CA002141750A CA2141750A CA2141750A1 CA 2141750 A1 CA2141750 A1 CA 2141750A1 CA 002141750 A CA002141750 A CA 002141750A CA 2141750 A CA2141750 A CA 2141750A CA 2141750 A1 CA2141750 A1 CA 2141750A1
- Authority
- CA
- Canada
- Prior art keywords
- retaining element
- clamping bolt
- tensioning
- clamping
- fixture according
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
- 238000010276 construction Methods 0.000 claims abstract description 34
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000004873 anchoring Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Dowels (AREA)
- Clamps And Clips (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Glass Compositions (AREA)
- Connection Of Plates (AREA)
Abstract
A clamping element for connecting a first and a second construction element, the first construction element supporting a tensioning member of the fixture and the second construction element having a recess for securing the clamping element, comprises a clamping bolt adapted by means of the tensioning member, for tensioning in an axial tensioning direction. The clamping bolt has a portion which widens transverse to the tensioning direction in a region of engagement with the second construction element. The clamping element also exhibits a retaining element which at least partially surrounds the widened portion of the clamping bolt, the retaining element being adapted, through motion of the clamping bolt in the tensioning direction, to expand transversely to the tensioning direction. The retaining element exhibits, on its outer element surface, at least one support arm which is elastically hinged to the retaining element and which projects beyond the retaining element surface transverse to the tensioning direction. The support arm is adapted to elastically pivot in opposition to movement of the retaining element in the tensioning direction.
Description
21~1750 Expansion Bolt The invention concerns a fixture for connecting construction elements in particular for flat furniture components, with a tensioning member supported by a first construction element as well as a clamping element which is attachable in an opening of the second construction element, whereby the clamping element exhibits a clamping bolt which can be tightened by means of the tensioning member in an axial tensioning direction and which, in a region of the second construction element assigned thereto, expands transversely to the tensioning direction, and also exhibiting a retaining element which at least partially surrounds the perimeter of the clamping bolt in the vicinity of the expanded portion and is expandable transverse to the tensioning direction by means of the clamping bolt.
In order to fashion a secure and stable connection between the appropriate construction elements by means of fixtures of this type, it is necessary to guarantee a secure anchoring of the clamping bolt. Furthermore, the anchoring of the clamping bolt must be effected directly in connection with the initiation of the tensile load on the clamping bolt in the tensioning direction. Under these conditions it is clear that the construction elements which are to be connected to each other, in the connected state, seat in close proximity to each other so that, consequently, no gap remains between the construction components.
As is known in the art, clamping bolts are utilized for this purpose which are provided with a tapping screw along their shanks. During assembly, the threaded portion of the conventional clamping bolt is screwed into the opening in the appropriate construction element. The thread thereby _ - 2 21~1750 cuts into the inner wall of the bore hole to secure the clamping bolt in the axial direction.
With the thoroughly functional fixture known in the art it is necessary to maintain relatively close tolerances on the diameter of the bore hole in which the clamping bolt engages. Should, namely, the diameter of the bore hole exceed the desired diameter by too great an extent, the thread, after screwing in, is presented with a relatively weak foundation and the connection between the clamping bolt and the corresponding construction element has limited loadability. A corresponding great degree of care must therefore be exercised when fashioning the assembly bore hole in the construction element. In order to facilitate an optimum interconnection between the clamping bolt and the appropriate tensioning member, it is necessary for the clamping bolt to be precisely directed when being screwed-in. This, however, assumes that the clamping bolt, prior to being screwed-in, is precisely adjusted with its threaded portion on the edge of the bore hole. Furthermore, when manufacturing the clamping bolt, it is necessary to cut a thread into the region adapted for the bore hole.
In the case of another conventional fixture, a tensioning bolt is utilized which is arranged in a displaceable fashion within a bore passage of an expansion anchor and which conically widens towards one end. For assembly, the expansion bolt is inserted with its conical end together with the expansion anchor into the appropriate bore hole of the furniture component. By exerting a tensile load on the tensioning bolt in the tensioning direction, the tensioning bolt is displaced relative to the expansion anchor to thereby expand the latter transversely to the tensioning 21~17~0 direction. An anchoring of the expansion anchor in the corresponding bore hole thereby requires a relative displacement of the tensioning bolt in the tensioning direction. The expansion anchor is moved along with the tensioning bolt in the tensioning direction until the desired clamping between the expansion anchor and the inner wall of the bore hole is established. In this fashion, the expansion anchor partially extends out of the bore hole. Due to this resulting protrusion of the expansion anchor beyond the mounting surface of the corresponding furniture component, the furniture components which are to connected to each other can no longer be brought into mutual contact in the assembled state. Rather, a gap remains between the furniture components whose gap width corresponds to the extend of protrusion of the expansion anchor.
It is therefore the underlying purpose of the invention to create a fixture which is characterized by simple production and assembly and which simultaneously allows for the secure, permanent, and directly adjacent connection of construction elements.
This purpose is achieved in accordance with the invention with a fixture of the above mentioned kind in that the retaining element exhibits, on its the outer perimeter facing away from the clamping bolt, at least one, preferentially two support arms which protrude beyond the outer contours of the retaining element transverse to the tensioning direction and are elastically pivotable against the tensioning direction. Should the diameter of the bore hole on whose walls the clamping bolt is to be secured be less than the required optimal diameter and if the retaining element is resiliently configured transverse to the _ -- 4 214175 ~
tensioning direction, it is possible, despite the diameter deviation, to insert the clamping element, comprising the clamping bolt and the retaining element, into the bore hole.
The force which is necessary therefor can be exercised by hand or, if necessary, with the help of assisting means such as, for example, a hammer. The clamping element, in the inserted position, is clampingly held in the region of the retaining element within the bore hole. Through activation of the tensioning member which, for example, can be a conventional tensioning cylinder having an eccentric guiding curve for a bolt-head of a clamping bolt, the clamping bolt is engaged and tightened in the tensioning direction. Due to the initial tension on the retaining element in the bore hole, the tightening of the clamping bolt does not lead to a relative motion between the retaining element and the inner wall of the bore hole. The retaining element thereby maintains its inserted position in the bore hole and the tensioning force acting on the clamping bolt does not cause it to move out of the bore hole. Due to the fact that the clamping bolt widens in the region of the retaining element transverse to the tensioning direction and due to the deformability of the retaining element in this direction, the latter is pressed, along its outer periphery, against the side walls of the bore hole when tightening the clamping bolt in the tensioning direction. Consequently, a loadable connection results between the clamping element in the vicinity of the retaining element and the corresponding construction element to cause an effective anchoring of the clamping bolt. By continued operation of the tensioning member, which is supported by the other construction element, and through the resulting tensile loading of the clamping bolt, it is possible to secure the two construction elements to each other in a stable and permanent fashion. A
_ - 5 -corresponding permanent connection can also be established with the fixture in accordance with the invention when the diameter of the receiving bore hole for the retaining element exceeds the desired dimension. If, in this event, the tensioning member is operated and consequently the clamping bolt subjected to a tensile load, the clamping element, including the retaining element, tends to move in the direction of the tensile load on the clamping bolt. A
motion of this kind acts, however, against the support arms protruding beyond the outer contours of the retaining element transverse to the tensioning direction. If the tensioning member is operated and consequently a tensile load exerted on the clamping bolt in the axial tensioning direction, the support arms of the retaining elements at the walls of the receiving bore hole, resist an axial motion of the clamping bolt caused by the exercised tensile force. In this fashion, the retaining element is temporarily held by the support arms in the receiving bore hole until the clamping bolt, due to the enlargement in the tensioning direction of the region of the retaining element inside the bore hole, has been sufficiently enlarged to exercise an effective retaining connection between the retaining element and the walls of the receiving bore. The support arms thereby assume the function of a foundation which keeps the retaining element in the receiving bore hole. Due to their elastic pivotability against the tensioning direction, the support arms represent only a minimal resistance for the retaining element when inserting the clamping element into the receiving bore. After introduction into the receiving bore they spread away from the retaining element and seat in a biased fashion on the walls of the receiving bore. The fixture is easily manufactured in that clamping bolts can be utilized with smooth peripheral surfaces so that no thread must be cut into the bolt perimeter.
A preferred embodiment of the invention provides for at least one support on the retaining element for the support arm which acts in a radial plane. The support serves to accept those loads acting on the support arm when the retaining element is rotated in the corresponding mounting bore hole. A rotation of the retaining element can simplify its introduction into the bore hole as well as its removal from the bore hole. The support reduces the load on the linking section by means of which the support arm is connected to the outside of the retaining element.
Since the support arm or the support arms is/are pivotable into a recess in the outer contour of the retaining element, the mounting as well as the demounting of the clamping element is simplified and damage to the retaining element in the vicinity of the support arms is avoided. The support arms thereby lie within the outer contours of the retaining element when rotating the clamping element in the receiving bore hole. On the one hand, an inhibiting of the turning of the retaining element by projecting support arms is thereby avoided; an interference between the support arms and possible protrusions on the inner wall of the receiving bore hole during rotation of the retaining element which, with continued rotation, could be torn from the retaining element is simultaneously prevented.
A preferred embodiment of the fixture in accordance with the invention with which an external thread is provided for on the outer circumference of the retaining element is characterized in that the support arm is flush with the outer contour of the retaining element in its pivoted-in ~ -- 7 position and exhibits at least one ribbed structure on a surface which is flush with the outer contour which runs in continuity with the outer thread of the retaining element.
The threads which project radially outward from the outer periphery of the retaining element simplify, on the one hand, the screwing of the retaining element into and out of the corresponding bore hole. Moreover the outer threads improve the anchoring of the clamping element in the corresponding construction element in particular if same is made from press board. In addition to the automatically resulting secure retaining connection with the wall of the bore hole, the thread conformingly engages into the composite structure of the construction element. Based on the described configuration of the fixture in accordance with the invention the effects mentioned can also be achieved in the region of the support arms.
In order to connect the clamping bolt and the retaining element, the clamping bolt and/or the retaining element exhibit an appropriate carrier means on their mutually facing surfaces which is largely transverse to the tensioning direction and which engages into a corresponding recess in the associated opposing surface. In this manner, a connection is established between the two components of the clamping element which is capable of receiving loads in the axial direction of the retaining element as well as in a plane directed perpendicularly thereto. The thereby resulting form-fitting connection between the clamping bolt and the retaining element prevents a relative motion between these two elements when axially inserting the clamping element into the receiving bore hole for the retaining element as well as when screwing the clamping element in or out, preferentially utilizing thread-like ribbed _ - 8 21417~
shoulders formed on the outer periphery of the retaining element.
The-connection between the retaining element and the clamping bolt likewise permits the retaining element to at least partially overlap the clamping bolt, on its end facing away from the tensioning member, transverse to the tensioning direction. The described overlap of the retaining element with the clamping bolt can be provided in addition to or alternatively to the above described carrier means connection. If one completely eliminates the carrier means connection to facilitate the overlap of the retaining element, the manufacture of the clamping bolt and of the retaining element is thereby significantly simplified, since, in this case, an effective form-fitting connection between both components is guaranteed without having to fashion carrier means and/or recesses on the connecting surfaces in order to accomplish this goal. The clamping bolt is secured in the direction towards the tensioning member on the retaining element by means of the enlargement provided for transverse to the tensioning direction.
A simplification of the assembly preparations occurs when the retaining element is split in a largely axial direction and when the portions of the retaining element are connected to each other in a hinged fashion. In this case the clamping bolt can be seated in one of the shell-like parts of the retaining element and, subsequently, be introduced together with the retaining element into the corresponding bore hole.
When retaining elements are made from plastic, a plastic film could be, for example, utilized as a hinged connection between the retaining element parts. Furthermore, following demounting the clamping elements, the clamping bolt and retaining element can be easily separated from each other.
This allows for the possibility of using the same clamping bolt a plurality of times while replacing used, deformed retaining elements with new functional retaining elements.
In an advantageous embodiment of the invention, the retaining element is split in a largely axial direction and the separate parts of the retaining element are connected to each other in a detachable fashion. A handy, easily manufactured, and easily detachable connection between the two parts of the retaining element is given when these parts snap into each other.
In a further preferred embodiment of the fixture in accordance with the invention, the retaining element exhibits a guide shoulder which-at least partially surrounds the outer periphery of the clamping bolt and which projects, in the tensioning direction, beyond the construction element associated with the assembled retaining element and which is associated with the construction element located on the tensioning member side. When operating the tensioning member, the construction elements which are to be connected to each other are pulled towards each other by means of the clamping bolt. Thereby, the guide shoulder enters into the bore hole of the construction element located on the tensioning member side which is provided therefor. In the assembled position the guide shoulder provides for a large area radial support for the clamping bolt in the construction element having the tensioning member. In this fashion the connection between the two construction elements is also stabilized transverse to the tensioning direction.
The invention is more closely described below with regard to ~ -- 10 ~4~75~
schematic representations and embodiments.
Fig. 1 shows the partial cross section of a first embodiment of a clamping element with molded plastic retaining element;
Fig. 2 shows a cross section through the retaining element in accordance with Fig. 1;
Fig. 3 shows a cross section of the retaining element of a second embodiment of a clamping element;
Fig. 4 shows a clamping bolt which can be snapped into engagement with the retaining element in accordance with Fig. 3;
Fig. 5 shows a retaining element comprising two half-shells which are connected to each other in a hinged fashion and Fig. 6 shows the inner surface of the half-shells of the retaining element in accordance with Fig. 5.
Fig.1 shows a clamping element 1 for the detachable connection of two flat furniture components which are not shown. The clamping element 1 consists of a clamping bolt 2 as well as an expansion bushing 3 serving as a retaining element.
During mounting, the expansion bushing 3 is introduced into a corresponding bore hole of the relevant flat furniture component. It is bordered on its outer perimeter by a radial ring-like stop 4 which sidewardly projects beyond the bore hole of the flat furniture component and, by means of which, the clamping element 1 is supported at the edge region of the bore hole. Should the depth of the bore hole exceed its desired dimensions, the stop ring 4 delimits the penetrating depth of the clamping element 1.
In addition to the stop 4, elastically pivotable support arms 5 as well as a plurality of radial rib-like shoulders 6 are provided for on the outer perimeter of the expansion bushing 3. The rib-like shoulders 6 form a right-handed thread.
A radially inwardly facing projection 7 is formed on the first, as seen from the insertion direction of the clamping element 1, rib-like shoulder 6. The expansion bushing 3 overlaps, by means of the projection 7, the end of the clamping bolt 2 guided within its interior. The expansion bushing 3, in the longitudinal direction of the clamping bolt 2, is divided by means of two longitudinally running separation slits 8. A guide shoulder 9 finally forms the continuation of the expansion bushing 3 in the axial direction and is manufactured, integral with same, from plastic. In the assembled position, the guide shoulder 9 is inserted into a bore hole of the second flat furniture component. Support ribs 10, 11 serve for axial fixing as well as for compensation of bore hole tolerances.
The clamping bolts 2 exhibit a cylindrical bolt shank 12, which widens in a radial direction at its end located at the expansion bushing side. The expansion bushing sided end of the clamping bolt 2 exhibits a longitudinal section which is largely trapezoidal and a largely rectangular cross section.
The opposite surfaces of the expansion bushing 3, molded onto the clamping bolt 2, are correspondingly configured.
The clamping bolt 2 widens into a bolt head on its upper end, which is not shown, by means of which it can be brought into engagement with a conventional tensioning member. The conventional tensioning member is a tensioning cylinder which is introduced into a cylindrical recess in the appropriate flat furniture component and which is seated therein in a rotatable fashion. An eccentric guiding groove is fashioned in the tensioning cylinder for guiding the bolt head. The cylindrical recess for the tensioning cylinder communicates via an additional bore hole, whose diameter is slightly larger than the diameter of the bolt head, with the bore hole adapted to receive the guide shoulder 9.
The flat furniture components which are to be connected to each other are initially provided with the necessary bore holes and recesses. Towards this end, a bore hole for the expansion bushing 3 is introduced into one of the flat furniture components. The second flat furniture component is provided with a bore hole for the guide shoulder 9, a cylindrically shaped recess for the tensioning cylinder, as well as with an additional bore hole for communication between the recess for the tensioning cylinder and the bore hole for the guide shoulder 9. The flat furniture components are delivered to the assembly location prepared in this fashion.
In order to connect the flat furniture components, the clamping element 1, with the expansion bushing 3, is pressed into the bore hole provided therefor or screwed in using the thread provided on the outer periphery of the expansion bushing 3. The support arms thereby come in contact with the edge of the bore hole and, with continued insertion of the expansion bushing 3, are pivoted radially inward. As soon as the stop ring 4 seats on the edge of the bore hole, the required penetration depth of the expansion bushing 3 in the bore hole is achieved.
Should the bore hole be larger than the the outer diameter of the expansion bushing 3, the support arms 5 protrude beyond the outer contours of the expansion bushing 3 in a sideward direction to seat, tilted at an acute angle, against the axial insertion direction on the wall of the bore hole. When a tensile force exerted on the expansion bushing 3 in a direction opposite to the insertion direction, the support arms 5 engage the walls of the bore hole and thereby secure the expansion bushing in the axial direction.
If the acceptance bore hole for the expansion bushing 3 is bored out with the intended dimension or, within a certain tolerance, below this dimension, the expansion bushing 3 is squeezed transversely to the insertion direction during insertion into the bore hole. Due to its material elasticity, the expansion bushing 3 is clampingly held in the bore hole subsequent to insertion. The rib-shaped shoulders 6 engage into the structure of the wall of the bore hole and thereby improve the axial fixing of the expansion bushing 3. The support arms 5 are, in this case, pivoted into the outer contours of the expansion bushing 3.
The clamping element 1 which is anchored into the first flat furniture component in the manner described, protrudes beyond this flat furniture component in the axial direction with the guide shoulder 9 as well as with the free end of the clamping bolt 2. During subsequent assembly, the free end of the clamping bolt 2 is then inserted through the bore hole for the guide shoulder 9 as well as through the extension bore hole thereof into the cylinder shaped recess for the tensioning cylinder. By means of rotation, the tensioning cylinder is brought into engagement with the head of the clamping bolt 2. As the angle of rotation of the tensioning cylinder is increased, the bolt head is guided along the guide curve of the tensioning cylinder to apply a tensile force to the clamping bolt 2. As a result, the clamping element 1 is pulled, with its guide shoulder 9, into the bore hole provided therefor before the flat furniture components which are to be connected seat against each other. A continued rotation of the tensioning cylinder then causes an axial relative motion of the clamping bolt 2 relative to the expansion bushing 3 axially secured in the second flat furniture component. The radially broadened end of the clamping bolt 2 located at the expansion bushing side spreads, in consequence of this relative displacement, the expansion bushing 3 outwardly to thereby increase the clamping force between the bore hole wall and the outer periphery of the expansion bushing 3 and to thereby improve the axial fixing of the clamping element 1 in the associated flat furniture component. A secure and permanent connection between the two flat furniture components is thereby guaranteed. The separation slits 8 of the expansion bushing 3, which are particularly visible in Fig. 2, lead to a reduction in the tensile force needed to effect the relative displacement of the clamping bolt 2, since they facilitate the spreading out of the expansion bushing 3.
In order to disconnect the two flat furniture components, the steps described above are reversed. When unscrewing the expansion bushing 3 from its appropriate bore hole, whereby the expansion bushing 3, due to its right-handed thread, must be rotated in a counter-clockwise direction, the support arms 5 can seat on bearing edges 13 which are provided in the outer periphery of the expansion bushing 3.
In this fashion, a tearing-off of the support arms 5 during unscrewing of the expansion bushing 3 is prevented.
In the clamping element 1 of Figs. 1 and 2, the plastic expansion bushing 3 is molded onto the clamping bolt 2, whereas Figs. 3 and 4 show construction components which snappingly engage each other.
An expansion bushing 3a, in use as a retaining element, only partially surrounds a clamping bolt 2a about its perimeter.
In order to connect the two components, the clamping bolt 2a is seated on the sideward holding guide 14 of the expansion bushing 3a and is pushed into a holding receptacle 15 of the expansion bushing 3a by pressure in a transverse direction.
The clamping bolt 2a exhibits, on a bolt shank 12a, a radially outward directed carrier means 16 which engages appropriately configured recesses in the inner wall of the expansion bushing 3a, which are not shown. With the assistance of carrier means 16 and the associated recesses in the inner wall of the expansion bushing 3a, a functional connection is established between the clamping bolt 2a and the expansion bushing 3a in an axial as well in a rotational direction of the clamping bolt 2a. In this manner, the carrier means 16 of the clamping bolt 2a serve as a foundation, in the rotational direction, for the expansion bushing 3a, when screwing the corresponding clamping element in or out; they prevent a relative displacement between the 21~17~0 expansion bushing 3a and the clamping bolt 2a in the axial direction when inserting the clamping element 2a. Otherwise the clamping bolt 2a and the expansion bushing 3a correspond to the construction elements shown in Figs. 1 and 2.
A retaining element, in the form of a longitudinally split expansion bushing 3b, is represented in figures 5 and 6. The longitudinal separation of the expansion bushing 3b effects half-shells 17, 18 which are connected to each other in a hinged fashion by means of plastic film 19. The half-shells 17, 18 exhibit recesses on their inner surface for the acceptance of a clamping bolt. In preparation for assembly of the clamping element, a clamping bolt is first inserted into the recess in the half-shell 17 or 18. The half-shells 17 and 18 are subsequently folded together.
In order to fashion a secure and stable connection between the appropriate construction elements by means of fixtures of this type, it is necessary to guarantee a secure anchoring of the clamping bolt. Furthermore, the anchoring of the clamping bolt must be effected directly in connection with the initiation of the tensile load on the clamping bolt in the tensioning direction. Under these conditions it is clear that the construction elements which are to be connected to each other, in the connected state, seat in close proximity to each other so that, consequently, no gap remains between the construction components.
As is known in the art, clamping bolts are utilized for this purpose which are provided with a tapping screw along their shanks. During assembly, the threaded portion of the conventional clamping bolt is screwed into the opening in the appropriate construction element. The thread thereby _ - 2 21~1750 cuts into the inner wall of the bore hole to secure the clamping bolt in the axial direction.
With the thoroughly functional fixture known in the art it is necessary to maintain relatively close tolerances on the diameter of the bore hole in which the clamping bolt engages. Should, namely, the diameter of the bore hole exceed the desired diameter by too great an extent, the thread, after screwing in, is presented with a relatively weak foundation and the connection between the clamping bolt and the corresponding construction element has limited loadability. A corresponding great degree of care must therefore be exercised when fashioning the assembly bore hole in the construction element. In order to facilitate an optimum interconnection between the clamping bolt and the appropriate tensioning member, it is necessary for the clamping bolt to be precisely directed when being screwed-in. This, however, assumes that the clamping bolt, prior to being screwed-in, is precisely adjusted with its threaded portion on the edge of the bore hole. Furthermore, when manufacturing the clamping bolt, it is necessary to cut a thread into the region adapted for the bore hole.
In the case of another conventional fixture, a tensioning bolt is utilized which is arranged in a displaceable fashion within a bore passage of an expansion anchor and which conically widens towards one end. For assembly, the expansion bolt is inserted with its conical end together with the expansion anchor into the appropriate bore hole of the furniture component. By exerting a tensile load on the tensioning bolt in the tensioning direction, the tensioning bolt is displaced relative to the expansion anchor to thereby expand the latter transversely to the tensioning 21~17~0 direction. An anchoring of the expansion anchor in the corresponding bore hole thereby requires a relative displacement of the tensioning bolt in the tensioning direction. The expansion anchor is moved along with the tensioning bolt in the tensioning direction until the desired clamping between the expansion anchor and the inner wall of the bore hole is established. In this fashion, the expansion anchor partially extends out of the bore hole. Due to this resulting protrusion of the expansion anchor beyond the mounting surface of the corresponding furniture component, the furniture components which are to connected to each other can no longer be brought into mutual contact in the assembled state. Rather, a gap remains between the furniture components whose gap width corresponds to the extend of protrusion of the expansion anchor.
It is therefore the underlying purpose of the invention to create a fixture which is characterized by simple production and assembly and which simultaneously allows for the secure, permanent, and directly adjacent connection of construction elements.
This purpose is achieved in accordance with the invention with a fixture of the above mentioned kind in that the retaining element exhibits, on its the outer perimeter facing away from the clamping bolt, at least one, preferentially two support arms which protrude beyond the outer contours of the retaining element transverse to the tensioning direction and are elastically pivotable against the tensioning direction. Should the diameter of the bore hole on whose walls the clamping bolt is to be secured be less than the required optimal diameter and if the retaining element is resiliently configured transverse to the _ -- 4 214175 ~
tensioning direction, it is possible, despite the diameter deviation, to insert the clamping element, comprising the clamping bolt and the retaining element, into the bore hole.
The force which is necessary therefor can be exercised by hand or, if necessary, with the help of assisting means such as, for example, a hammer. The clamping element, in the inserted position, is clampingly held in the region of the retaining element within the bore hole. Through activation of the tensioning member which, for example, can be a conventional tensioning cylinder having an eccentric guiding curve for a bolt-head of a clamping bolt, the clamping bolt is engaged and tightened in the tensioning direction. Due to the initial tension on the retaining element in the bore hole, the tightening of the clamping bolt does not lead to a relative motion between the retaining element and the inner wall of the bore hole. The retaining element thereby maintains its inserted position in the bore hole and the tensioning force acting on the clamping bolt does not cause it to move out of the bore hole. Due to the fact that the clamping bolt widens in the region of the retaining element transverse to the tensioning direction and due to the deformability of the retaining element in this direction, the latter is pressed, along its outer periphery, against the side walls of the bore hole when tightening the clamping bolt in the tensioning direction. Consequently, a loadable connection results between the clamping element in the vicinity of the retaining element and the corresponding construction element to cause an effective anchoring of the clamping bolt. By continued operation of the tensioning member, which is supported by the other construction element, and through the resulting tensile loading of the clamping bolt, it is possible to secure the two construction elements to each other in a stable and permanent fashion. A
_ - 5 -corresponding permanent connection can also be established with the fixture in accordance with the invention when the diameter of the receiving bore hole for the retaining element exceeds the desired dimension. If, in this event, the tensioning member is operated and consequently the clamping bolt subjected to a tensile load, the clamping element, including the retaining element, tends to move in the direction of the tensile load on the clamping bolt. A
motion of this kind acts, however, against the support arms protruding beyond the outer contours of the retaining element transverse to the tensioning direction. If the tensioning member is operated and consequently a tensile load exerted on the clamping bolt in the axial tensioning direction, the support arms of the retaining elements at the walls of the receiving bore hole, resist an axial motion of the clamping bolt caused by the exercised tensile force. In this fashion, the retaining element is temporarily held by the support arms in the receiving bore hole until the clamping bolt, due to the enlargement in the tensioning direction of the region of the retaining element inside the bore hole, has been sufficiently enlarged to exercise an effective retaining connection between the retaining element and the walls of the receiving bore. The support arms thereby assume the function of a foundation which keeps the retaining element in the receiving bore hole. Due to their elastic pivotability against the tensioning direction, the support arms represent only a minimal resistance for the retaining element when inserting the clamping element into the receiving bore. After introduction into the receiving bore they spread away from the retaining element and seat in a biased fashion on the walls of the receiving bore. The fixture is easily manufactured in that clamping bolts can be utilized with smooth peripheral surfaces so that no thread must be cut into the bolt perimeter.
A preferred embodiment of the invention provides for at least one support on the retaining element for the support arm which acts in a radial plane. The support serves to accept those loads acting on the support arm when the retaining element is rotated in the corresponding mounting bore hole. A rotation of the retaining element can simplify its introduction into the bore hole as well as its removal from the bore hole. The support reduces the load on the linking section by means of which the support arm is connected to the outside of the retaining element.
Since the support arm or the support arms is/are pivotable into a recess in the outer contour of the retaining element, the mounting as well as the demounting of the clamping element is simplified and damage to the retaining element in the vicinity of the support arms is avoided. The support arms thereby lie within the outer contours of the retaining element when rotating the clamping element in the receiving bore hole. On the one hand, an inhibiting of the turning of the retaining element by projecting support arms is thereby avoided; an interference between the support arms and possible protrusions on the inner wall of the receiving bore hole during rotation of the retaining element which, with continued rotation, could be torn from the retaining element is simultaneously prevented.
A preferred embodiment of the fixture in accordance with the invention with which an external thread is provided for on the outer circumference of the retaining element is characterized in that the support arm is flush with the outer contour of the retaining element in its pivoted-in ~ -- 7 position and exhibits at least one ribbed structure on a surface which is flush with the outer contour which runs in continuity with the outer thread of the retaining element.
The threads which project radially outward from the outer periphery of the retaining element simplify, on the one hand, the screwing of the retaining element into and out of the corresponding bore hole. Moreover the outer threads improve the anchoring of the clamping element in the corresponding construction element in particular if same is made from press board. In addition to the automatically resulting secure retaining connection with the wall of the bore hole, the thread conformingly engages into the composite structure of the construction element. Based on the described configuration of the fixture in accordance with the invention the effects mentioned can also be achieved in the region of the support arms.
In order to connect the clamping bolt and the retaining element, the clamping bolt and/or the retaining element exhibit an appropriate carrier means on their mutually facing surfaces which is largely transverse to the tensioning direction and which engages into a corresponding recess in the associated opposing surface. In this manner, a connection is established between the two components of the clamping element which is capable of receiving loads in the axial direction of the retaining element as well as in a plane directed perpendicularly thereto. The thereby resulting form-fitting connection between the clamping bolt and the retaining element prevents a relative motion between these two elements when axially inserting the clamping element into the receiving bore hole for the retaining element as well as when screwing the clamping element in or out, preferentially utilizing thread-like ribbed _ - 8 21417~
shoulders formed on the outer periphery of the retaining element.
The-connection between the retaining element and the clamping bolt likewise permits the retaining element to at least partially overlap the clamping bolt, on its end facing away from the tensioning member, transverse to the tensioning direction. The described overlap of the retaining element with the clamping bolt can be provided in addition to or alternatively to the above described carrier means connection. If one completely eliminates the carrier means connection to facilitate the overlap of the retaining element, the manufacture of the clamping bolt and of the retaining element is thereby significantly simplified, since, in this case, an effective form-fitting connection between both components is guaranteed without having to fashion carrier means and/or recesses on the connecting surfaces in order to accomplish this goal. The clamping bolt is secured in the direction towards the tensioning member on the retaining element by means of the enlargement provided for transverse to the tensioning direction.
A simplification of the assembly preparations occurs when the retaining element is split in a largely axial direction and when the portions of the retaining element are connected to each other in a hinged fashion. In this case the clamping bolt can be seated in one of the shell-like parts of the retaining element and, subsequently, be introduced together with the retaining element into the corresponding bore hole.
When retaining elements are made from plastic, a plastic film could be, for example, utilized as a hinged connection between the retaining element parts. Furthermore, following demounting the clamping elements, the clamping bolt and retaining element can be easily separated from each other.
This allows for the possibility of using the same clamping bolt a plurality of times while replacing used, deformed retaining elements with new functional retaining elements.
In an advantageous embodiment of the invention, the retaining element is split in a largely axial direction and the separate parts of the retaining element are connected to each other in a detachable fashion. A handy, easily manufactured, and easily detachable connection between the two parts of the retaining element is given when these parts snap into each other.
In a further preferred embodiment of the fixture in accordance with the invention, the retaining element exhibits a guide shoulder which-at least partially surrounds the outer periphery of the clamping bolt and which projects, in the tensioning direction, beyond the construction element associated with the assembled retaining element and which is associated with the construction element located on the tensioning member side. When operating the tensioning member, the construction elements which are to be connected to each other are pulled towards each other by means of the clamping bolt. Thereby, the guide shoulder enters into the bore hole of the construction element located on the tensioning member side which is provided therefor. In the assembled position the guide shoulder provides for a large area radial support for the clamping bolt in the construction element having the tensioning member. In this fashion the connection between the two construction elements is also stabilized transverse to the tensioning direction.
The invention is more closely described below with regard to ~ -- 10 ~4~75~
schematic representations and embodiments.
Fig. 1 shows the partial cross section of a first embodiment of a clamping element with molded plastic retaining element;
Fig. 2 shows a cross section through the retaining element in accordance with Fig. 1;
Fig. 3 shows a cross section of the retaining element of a second embodiment of a clamping element;
Fig. 4 shows a clamping bolt which can be snapped into engagement with the retaining element in accordance with Fig. 3;
Fig. 5 shows a retaining element comprising two half-shells which are connected to each other in a hinged fashion and Fig. 6 shows the inner surface of the half-shells of the retaining element in accordance with Fig. 5.
Fig.1 shows a clamping element 1 for the detachable connection of two flat furniture components which are not shown. The clamping element 1 consists of a clamping bolt 2 as well as an expansion bushing 3 serving as a retaining element.
During mounting, the expansion bushing 3 is introduced into a corresponding bore hole of the relevant flat furniture component. It is bordered on its outer perimeter by a radial ring-like stop 4 which sidewardly projects beyond the bore hole of the flat furniture component and, by means of which, the clamping element 1 is supported at the edge region of the bore hole. Should the depth of the bore hole exceed its desired dimensions, the stop ring 4 delimits the penetrating depth of the clamping element 1.
In addition to the stop 4, elastically pivotable support arms 5 as well as a plurality of radial rib-like shoulders 6 are provided for on the outer perimeter of the expansion bushing 3. The rib-like shoulders 6 form a right-handed thread.
A radially inwardly facing projection 7 is formed on the first, as seen from the insertion direction of the clamping element 1, rib-like shoulder 6. The expansion bushing 3 overlaps, by means of the projection 7, the end of the clamping bolt 2 guided within its interior. The expansion bushing 3, in the longitudinal direction of the clamping bolt 2, is divided by means of two longitudinally running separation slits 8. A guide shoulder 9 finally forms the continuation of the expansion bushing 3 in the axial direction and is manufactured, integral with same, from plastic. In the assembled position, the guide shoulder 9 is inserted into a bore hole of the second flat furniture component. Support ribs 10, 11 serve for axial fixing as well as for compensation of bore hole tolerances.
The clamping bolts 2 exhibit a cylindrical bolt shank 12, which widens in a radial direction at its end located at the expansion bushing side. The expansion bushing sided end of the clamping bolt 2 exhibits a longitudinal section which is largely trapezoidal and a largely rectangular cross section.
The opposite surfaces of the expansion bushing 3, molded onto the clamping bolt 2, are correspondingly configured.
The clamping bolt 2 widens into a bolt head on its upper end, which is not shown, by means of which it can be brought into engagement with a conventional tensioning member. The conventional tensioning member is a tensioning cylinder which is introduced into a cylindrical recess in the appropriate flat furniture component and which is seated therein in a rotatable fashion. An eccentric guiding groove is fashioned in the tensioning cylinder for guiding the bolt head. The cylindrical recess for the tensioning cylinder communicates via an additional bore hole, whose diameter is slightly larger than the diameter of the bolt head, with the bore hole adapted to receive the guide shoulder 9.
The flat furniture components which are to be connected to each other are initially provided with the necessary bore holes and recesses. Towards this end, a bore hole for the expansion bushing 3 is introduced into one of the flat furniture components. The second flat furniture component is provided with a bore hole for the guide shoulder 9, a cylindrically shaped recess for the tensioning cylinder, as well as with an additional bore hole for communication between the recess for the tensioning cylinder and the bore hole for the guide shoulder 9. The flat furniture components are delivered to the assembly location prepared in this fashion.
In order to connect the flat furniture components, the clamping element 1, with the expansion bushing 3, is pressed into the bore hole provided therefor or screwed in using the thread provided on the outer periphery of the expansion bushing 3. The support arms thereby come in contact with the edge of the bore hole and, with continued insertion of the expansion bushing 3, are pivoted radially inward. As soon as the stop ring 4 seats on the edge of the bore hole, the required penetration depth of the expansion bushing 3 in the bore hole is achieved.
Should the bore hole be larger than the the outer diameter of the expansion bushing 3, the support arms 5 protrude beyond the outer contours of the expansion bushing 3 in a sideward direction to seat, tilted at an acute angle, against the axial insertion direction on the wall of the bore hole. When a tensile force exerted on the expansion bushing 3 in a direction opposite to the insertion direction, the support arms 5 engage the walls of the bore hole and thereby secure the expansion bushing in the axial direction.
If the acceptance bore hole for the expansion bushing 3 is bored out with the intended dimension or, within a certain tolerance, below this dimension, the expansion bushing 3 is squeezed transversely to the insertion direction during insertion into the bore hole. Due to its material elasticity, the expansion bushing 3 is clampingly held in the bore hole subsequent to insertion. The rib-shaped shoulders 6 engage into the structure of the wall of the bore hole and thereby improve the axial fixing of the expansion bushing 3. The support arms 5 are, in this case, pivoted into the outer contours of the expansion bushing 3.
The clamping element 1 which is anchored into the first flat furniture component in the manner described, protrudes beyond this flat furniture component in the axial direction with the guide shoulder 9 as well as with the free end of the clamping bolt 2. During subsequent assembly, the free end of the clamping bolt 2 is then inserted through the bore hole for the guide shoulder 9 as well as through the extension bore hole thereof into the cylinder shaped recess for the tensioning cylinder. By means of rotation, the tensioning cylinder is brought into engagement with the head of the clamping bolt 2. As the angle of rotation of the tensioning cylinder is increased, the bolt head is guided along the guide curve of the tensioning cylinder to apply a tensile force to the clamping bolt 2. As a result, the clamping element 1 is pulled, with its guide shoulder 9, into the bore hole provided therefor before the flat furniture components which are to be connected seat against each other. A continued rotation of the tensioning cylinder then causes an axial relative motion of the clamping bolt 2 relative to the expansion bushing 3 axially secured in the second flat furniture component. The radially broadened end of the clamping bolt 2 located at the expansion bushing side spreads, in consequence of this relative displacement, the expansion bushing 3 outwardly to thereby increase the clamping force between the bore hole wall and the outer periphery of the expansion bushing 3 and to thereby improve the axial fixing of the clamping element 1 in the associated flat furniture component. A secure and permanent connection between the two flat furniture components is thereby guaranteed. The separation slits 8 of the expansion bushing 3, which are particularly visible in Fig. 2, lead to a reduction in the tensile force needed to effect the relative displacement of the clamping bolt 2, since they facilitate the spreading out of the expansion bushing 3.
In order to disconnect the two flat furniture components, the steps described above are reversed. When unscrewing the expansion bushing 3 from its appropriate bore hole, whereby the expansion bushing 3, due to its right-handed thread, must be rotated in a counter-clockwise direction, the support arms 5 can seat on bearing edges 13 which are provided in the outer periphery of the expansion bushing 3.
In this fashion, a tearing-off of the support arms 5 during unscrewing of the expansion bushing 3 is prevented.
In the clamping element 1 of Figs. 1 and 2, the plastic expansion bushing 3 is molded onto the clamping bolt 2, whereas Figs. 3 and 4 show construction components which snappingly engage each other.
An expansion bushing 3a, in use as a retaining element, only partially surrounds a clamping bolt 2a about its perimeter.
In order to connect the two components, the clamping bolt 2a is seated on the sideward holding guide 14 of the expansion bushing 3a and is pushed into a holding receptacle 15 of the expansion bushing 3a by pressure in a transverse direction.
The clamping bolt 2a exhibits, on a bolt shank 12a, a radially outward directed carrier means 16 which engages appropriately configured recesses in the inner wall of the expansion bushing 3a, which are not shown. With the assistance of carrier means 16 and the associated recesses in the inner wall of the expansion bushing 3a, a functional connection is established between the clamping bolt 2a and the expansion bushing 3a in an axial as well in a rotational direction of the clamping bolt 2a. In this manner, the carrier means 16 of the clamping bolt 2a serve as a foundation, in the rotational direction, for the expansion bushing 3a, when screwing the corresponding clamping element in or out; they prevent a relative displacement between the 21~17~0 expansion bushing 3a and the clamping bolt 2a in the axial direction when inserting the clamping element 2a. Otherwise the clamping bolt 2a and the expansion bushing 3a correspond to the construction elements shown in Figs. 1 and 2.
A retaining element, in the form of a longitudinally split expansion bushing 3b, is represented in figures 5 and 6. The longitudinal separation of the expansion bushing 3b effects half-shells 17, 18 which are connected to each other in a hinged fashion by means of plastic film 19. The half-shells 17, 18 exhibit recesses on their inner surface for the acceptance of a clamping bolt. In preparation for assembly of the clamping element, a clamping bolt is first inserted into the recess in the half-shell 17 or 18. The half-shells 17 and 18 are subsequently folded together.
Claims (10)
1. Fixture for the connection of construction elements, in particular, for flat furniture components, with a tensioning member supported by a first construction element as well as a clamping element (1) which can be secured in a recess in the second construction element, whereby the clamping element (1) exhibits a clamping bolt (2, 2a) which, by means of the tensioning member, can be tightened in an axial tensioning direction and which widens transversely to the tensioning direction in a region of the second construction element assigned thereto as well as a retaining element (3, 3a, 3b) which at least partially surrounds the periphery of the clamping bolt (2, 2a) in the vicinity of the enlargement and, by means of the clamping bolt (2, 2a), can be expanded transversely to the tensioning direction, characterized in that the retaining element (3, 3a, 3b) exhibits, on its outer periphery facing away from the clamping bolt (2, 2a), at least one, preferentially two, support arms (5) which project beyond the outer contour of the retaining element (3, 3a, 3b) transverse to the tensioning direction and which are elastically pivotable against the tensioning direction.
2. Fixture according to claim 1 characterized in that at least one support is provided for the support arm (5) on the retaining element (3, 3a, 3b) which acts in a radial plane.
3. Fixture according to claim 1 or 2 characterized in that the support arm (5) can be pivoted into a recess in the outer contour of the retaining element (3, 3a, 3b).
4. Fixture according to claim 3 having an outer thread on the outer periphery of the retaining element (3, 3a, 3b), characterized in that the support arm (5) is flush with the outer contour of the retaining element (3, 3a, 3b) in the pivoted-in position and exhibits, on the surface flush with the outer contour, at least one rib-like shoulder which runs in continuity with the outer thread of the retaining element (3, 3a, 3b).
5. Fixture according to one of the claims 1 to 4, characterized in that the clamping bolt (2, 2a) and/or the retaining element (3, 3a, 3b) exhibit at least one carrier means (16) on their facing inner surfaces which is largely transverse to the tensioning direction and which engages into a recess in the associated opposite surface.
6. Fixture according to one of the claims 1 to 5, characterized in that the retaining element (3, 3a, 3b) at least partially overlaps, transverse to the tensioning direction, the clamping bolt (2, 2a) on its end facing away from the tensioning member.
7. Fixture according to one of the claims 1 to 6, characterized in that the retaining element (3, 3a, 3b) is divided in a largely axial direction and the parts of the retaining element (3, 3a, 3b) are attached to each other in a hinged fashion.
8. Fixture according to one of the claims 1 to 7, characterized in that the retaining element (3, 3a, 3b) is divided in a largely axial direction and the parts of the retaining element (3, 3a, 3b) are connected to each other in a detachable fashion.
9. Fixture according to claim 8, characterized in that the parts of the retaining element (3, 3a, 3b) can be snapped into each other.
10. Fixture according to one of the claims 1 to 9, characterized in that the retaining element (3, 3a, 3b) exhibits a guide shoulder which at least partially surroundingly engages the clamping bolt (2, 2a) on its outer periphery and which projects, in the tensioning direction, beyond the construction component assigned to the retaining element (3, 3a, 3b) in the assembled location and which is associated with the construction component on the tensioning member side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9401970U DE9401970U1 (en) | 1994-02-07 | 1994-02-07 | Expansion bolts |
| DEG9401970.3 | 1994-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2141750A1 true CA2141750A1 (en) | 1995-08-08 |
Family
ID=6904228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002141750A Abandoned CA2141750A1 (en) | 1994-02-07 | 1995-02-03 | Expansion bolt |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0666426A1 (en) |
| JP (1) | JPH0854009A (en) |
| KR (1) | KR950033133A (en) |
| AU (1) | AU1158295A (en) |
| BR (1) | BR9500443A (en) |
| CA (1) | CA2141750A1 (en) |
| CZ (1) | CZ28795A3 (en) |
| DE (1) | DE9401970U1 (en) |
| PL (1) | PL307043A1 (en) |
| SI (1) | SI9500041A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1688306B1 (en) * | 2003-11-25 | 2010-07-21 | Harada Industry Co., Ltd. | Vehicle roof antenna installation device |
| DE202015105030U1 (en) | 2015-09-23 | 2015-10-19 | Häfele GmbH & Co KG | Spreader sleeve overmolded connecting spreader pin |
| CN106015211B (en) * | 2016-06-22 | 2018-11-13 | 浙江绿健胶囊有限公司 | A kind of detachable fastener |
| EP3569876A1 (en) * | 2018-05-14 | 2019-11-20 | HILTI Aktiengesellschaft | Fixing mortar and anchor bolt for use in fixing mortar, method for manufacturing an anchor bolt |
| CN113530938B (en) * | 2021-05-27 | 2022-09-27 | 李坤 | Large-load fastener |
| CN114209183B (en) * | 2022-01-05 | 2023-08-29 | 慕思健康睡眠股份有限公司 | Bedstead and bed |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6507571A (en) * | 1965-02-01 | 1966-08-02 | ||
| US4052925A (en) * | 1975-11-05 | 1977-10-11 | U.S. Expansion Bolt Company | Expansion stud |
| DE4219984A1 (en) * | 1992-06-19 | 1993-12-23 | Fischer Artur Werke Gmbh | Expansion anchor |
-
1994
- 1994-02-07 DE DE9401970U patent/DE9401970U1/en not_active Expired - Lifetime
-
1995
- 1995-01-20 EP EP95100741A patent/EP0666426A1/en not_active Withdrawn
- 1995-02-02 PL PL95307043A patent/PL307043A1/en unknown
- 1995-02-03 CA CA002141750A patent/CA2141750A1/en not_active Abandoned
- 1995-02-03 KR KR1019950001909A patent/KR950033133A/en not_active Application Discontinuation
- 1995-02-06 CZ CZ95287A patent/CZ28795A3/en unknown
- 1995-02-06 AU AU11582/95A patent/AU1158295A/en not_active Abandoned
- 1995-02-06 BR BR9500443A patent/BR9500443A/en not_active Application Discontinuation
- 1995-02-07 SI SI9500041A patent/SI9500041A/en unknown
- 1995-02-07 JP JP7019585A patent/JPH0854009A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0666426A1 (en) | 1995-08-09 |
| DE9401970U1 (en) | 1994-03-24 |
| PL307043A1 (en) | 1995-08-21 |
| JPH0854009A (en) | 1996-02-27 |
| AU1158295A (en) | 1995-08-17 |
| CZ28795A3 (en) | 1995-09-13 |
| SI9500041A (en) | 1995-08-31 |
| BR9500443A (en) | 1995-10-03 |
| KR950033133A (en) | 1995-12-22 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Dead |