Abstract: An assembly kit has a structural element having two elongated leg portions, and a hinge portion pivotally connecting the leg portions with one another in a direction of elongation thereof and together with the leg portions forming an integral member. Means is provided for connecting the structural element with another structural element. Two such structural elements may be located laterally adjacent to one another and connected with one another by a plate-like connecting piece which overlaps juxtaposed end sections of the structural element and is connected with the latter by the connecting means. Three such structural elements may be located relative to one another so as to form a substantially triangular hollow support element, and a substantially triangular connecting piece may be inserted in a hollow of the support element and connected with the structural elements by the connecting means.

Abstract: An assembly kit has a hollow structural element having at least one groove inwardly of a face thereof and open to the hollow of this structural element, and a recess communicating with the groove and open at the face of this structural element. Another structural element is positionable on the first-mentioned hollow structural element and has another groove which is smaller than the groove of the hollow structural element. A connecting element is provided, which has one portion insertable in the one groove of the hollow structural element, and another portion insertable in the other groove of the other structural element so as to connect the above structural elements with one another. The connecting element has also a third portion insertable in the recess of the hollow structural element so as to prevent the connecting element from moving inwardly of the hollow of the hollow structural element.

Abstract: A crank assembly has an elongated shaft member having two end portions spaced from one another in the direction of an axis of the shaft, one of which portions is provided with a transverse projection. Two structural members are provided adapted to be located at a respective end portion of the crank and to support the same. One of the structural members has an undercut groove and the other structural member has an opening provided with an enlargement in its circumference. The shaft member is insertable into the groove and through the opening so that it can rotate relative to the structural members about the axis of the shaft member. At the same time, the projection of the shaft member is arrestable against undesired rotation by axial displacement of the shaft member relative to the structural members until the projection of the former becomes lodged in the enlargement of the opening of the other structural member, whereby rotation of the shaft member is prevented.

Abstract: An assembly kit for assembling a toy vehicle has an upper part provided with an undercut groove on a lower end surface thereof, and a lower part including structural elements each provided with a bar-shaped undercut element engaging the undercut groove so as to connect the lower and the upper parts with one another. The upper part is hollow, whereas the lower part is plate-like and is additionally provided with two axle end portions for mounting wheels of the vehicle thereon. The bar-shaped undercut element has an elongated groove and is located between the axle end portions in alignment with the latter.

Abstract: A hollow structural element for assembling a structure, has a hollow body part having an open side and being provided with means for connecting the body part with another structural element, and a cover insertable in the body part through the open side thereof. The cover is provided with at least one connecting element for connecting the same with a further structural element. The connecting element projects outwardly beyond a side margin of the cover and thereby forms a stop preventing the cover from excessive movement inwardly of the open side of the body part. Two such connecting elements may be arranged on the cover. The body part and the cover may be cup-shaped. The connecting means of the body part may be formed as undercut grooves and elongated undercut members. The connecting elements of the cover may also be formed as elongated undercut members.

Abstract: A drilling assembly includes a drilling tool having a shank and a drill bit at the leading end of the shank and having cutting edges. The assembly further includes a collar adjustably and arrestably mounted on the shank, and an abutment member having a central passage into which the tool element is received at least during terminal phase of the drilling operation. The collar has a convex contact surface, and the abutment member is formed with a depression bounded by a concave contact surface, the two contact surfaces sliding on one another when the tool element is pivoted to form an undercut hole in a support structure. The abutment member abuts against a surface of the support structure around the open end of the hole, and is prevented from rotating with the tool element either by pins which penetrate into the support structure, or by a layer of friction-retarding material, such as rubber, interposed between the abutment member and the surface of the support structure.

Abstract: An arrangement for anchoring a mounting element in a hole of a masonry and the like with the use of binding material has a sleeve-shaped mounting element insertable in the hole and having an axis and an inner bore adapted to receive therein a threaded element, a plurality of retaining members arranged on the mounting element for fixing the latter in the hole, which retaining members extend transversely to the axis of the sleeve-shaped element and taper towards a wall of the hole, and a flange arranged at a trailing end of the mounting element so as to close a hole and having an opening for mounting a feeding device, feeding the binding material into the hole. The retaining members have throughgoing apertures through which the binding material flows so as to reliably fill the hole. The retaining members are preferably wedge-shaped. The feeding device may be inserted not only in the opening of the flange but also directly in the inner bore of the mounting element.

Abstract: An assembly kit has a plate element having an undercut groove which extends from one edge of the plate element and is open at one face of the latter, and a bore communicating with the undercut groove. The assembly kit also includes an axle element having a pin-shaped portion insertable in the bore of the plate element, a holding portion insertable in the undercut groove of the plate element, and a shaft portion. The holding portion of the axle element has a non-circular cross-section mating with the cross-section of the undercut groove of the plate element and is provided with projecting connecting means for connecting the holding portion with another structural element of the kit. The above connecting means may be formed as an undercut projection extending outwardly beyond the one face of the plate element when the axle element is inserted in the latter. A plurality of such undercut grooves and bores may be provided in the plate element.

Abstract: A toy assembly kit includes a building block having an exposed surface, and an undercut male coupling element of one-piece with the block and projecting from the exposed surface. The male coupling element has a free end face and a predetermined length intermediate the latter and the exposed surface. A support plate is connectable with the block and has two substantially parallel major surfaces spaced apart at a distance which substantially corresponds to said predetermined length. The plate has wall portions bounding a slot which extends intermediate the major surfaces, and these wall portions include a pair of ridges at opposite sides of the slot. These ridges project into the slot at a location substantially midway between the major surfaces and bound a pair of undercut female coupling recesses in the slot. Each recess has a cross-sectional area dimensioned to receive the male coupling element and for thereby interconnecting the block and plate.

Abstract: An anchoring arrangement kit includes a drilling tool adapted to drill a generally cylindrical anchoring hole in a support structure. The kit further includes a support arrangement which supports the drill for rocking or orbiting motion to thereby enlarge the bottom region of the cylindrical hole, the arrangement including an abutment member which is stationary, and a cover member which rotates with the drilling tool during the undercutting operation, these members having complementary concave and convex contact surfaces for the rocking or orbiting motion of the drilling tool. The kit further includes a plurality of anchoring elements each having an anchoring member and a cap member surrounding the trailing end portion of the anchoring member so as to support the anchoring element at an open end of the hole with a clearance between the anchoring member and the surface bounding the hole.

Abstract: A drilling assembly includes a drilling tool having a shank and a drill bit at the leading end of the shank and having cutting edges. The assembly further includes a collar adjustably and arrestably mounted on the shank, and an abutment member having a central passage into which the tool element is received at least during terminal phase of the drilling operation. The collar has a convex contact surface, and the abutment member is formed with a depression bounded by a concave contact surface, the two contact surfaces sliding on one another when the tool element is pivoted to form an undercut hole in a support structure. The abutment member abuts against a surface of the support structure around the open end of the hole, and is prevented from rotating with the tool element either by pins which penetrate into the support structure, or by a layer of friction-retarding material, such as rubber, interposed between the abutment member and the surface of the support structure.

Abstract: A structural element, particularly for multi-element toy kits, includes an elongated circumferential wall which bounds an interior space and which has opposite ends. An end wall overlies one of the ends of the circumferential wall. The interior space is subdivided by two partitions. Each partition has side portions connectable with the circumferential wall, and an undercut coupling projection which projects from the respective partition. An elongated groove is formed at the end wall and has an open end at the circumferential wall. The groove is undercut complementarily to the projection for slidably receiving an undercut coupling projection of another structural element through the open end of the groove. The structural element may be made by injection molding.

Abstract: An anchoring arrangement for securing an object to a support structure having an internal cavity includes an anchoring element which extends through an anchoring hole into the internal cavity and includes a hollow anchoring member having a passage at its leading end and a collar mounted on the trailing end of the anchoring member so as to surround the same, which supports the anchoring element in the anchoring hole and closes the anchoring hole around the anchoring member. A bag-shaped limiting member surrounds at least a portion of the anchoring element and defines a compartment therewith, and hardenable material is introduced into the compartment through the interior of the anchoring member and through the passage to fill the compartment and to harden therein in form of a body of hardened material which attaches the anchoring element to the support structure and prevents an extraction thereof from the anchoring hole.

Abstract: A mounting device for use in masonry and the like comprises an expandable member adapted to be received in a hole of a structure and an expander member adapted to expand at least a leading end of the expandable member. A shaft member is provided which has a first portion located in the hole and connected to the expander member, and a second portion outwardly projecting from the hole towards an object to be mounted and adapted to carry the latter at a distance from the structure. A first sleeve-shaped element encloses the first portion and a section of the second portion of the shaft member over a length corresponding to a part of the distance between the structure and the object. A second sleeve-shaped element encloses another section of the second portion of the shaft member over a length corresponding to the remainder of the distance. The second sleeve-shaped element is adapted to support the object to be mounted and is mounted on the first sleeve-shaped element for turning movement relative thereto.

Abstract: A drive arrangement particularly for a toy model assembled of component parts has a housing having a wall, a motor means with a drive screw extending through the wall of the housing, and a drive gear adapted to mesh with the drive screw and mounted on an axle. A first connecting portion is provided on the wall of the housing. An adapter member having a recess for passage of the drive screw therethrough is engageable with and movable over the first connecting portion so as to be mounted on the wall of the housing. A second connecting portion is provided on the adapter member, which second connecting portion is elongated in a direction substantially normal to the direction of movement of the adapter member. An axle support member supports the axle of the gear wheel and is movable in the second direction over the second connecting portion so as to be mounted on the adapter member and thereby on the wall of the housing. Means for limiting the movement of the adapter member are further provided.

Abstract: A method and an arrangement for securing an object to a low-strength support structure includes inserting an anchor member into an anchoring hole provided in the support structure with clearance. The anchor member has an internal passage that extends from its leading end towards its trailing end and which communicates with the anchoring hole. A device is inserted into the passage and ejects a quick-setting substance into the passage and from there to the immediate exterior of the anchor member so that the substance surrounds the anchor member and forms a plug thereabout. The plug partially fills the clearance and fixes the anchor member securely in the anchoring hole upon the hardening of the substance. A flange is provided at the trailing end of the anchor member to seal the anchor hole against outflow of the quick-setting substance therefrom.

Abstract: A composite large plate is connected with a structural element and has an undercut coupling projection having at least two structural plates. Each of the structural plates has two undercut slots and is adapted to be located adjacent to one another so that at least one of the slots of one of the structural plates is substantially parallel to one slot of the other structural plate. A plate-like connecting member is provided, having two elongated undercut projections substantially parallel to one another and each engageable in one of the slots of the structural plates. When the elongated undercut projections engage in the slots of the structural plates the latter are assembled with one another so as to form the composite plate, and the structural element can be connected to the thus-formed composite plate by inserting the coupling projection thereof in the respective other one of the slots.

Abstract: A method and arrangement for orienting objects on support structures formed with an anchoring hole utilizes an elongated element, a fixing member and a plate member. The fixing member is fixedly mounted on the hole of the support structure. The elongated element is inserted through the passage with clearance so that leading and trailing portions of the element are respective located within and outside of the hole. An object is mounted on the trailing portion of the element. The plate member is juxtaposed over the fixing member and is connected to the elongated element. Movement of the plate member relative to the fixing member caused by displacement of the elongated element in the clearance results in orientation of the object which is mounted on the element to any of a plurality of positions relative to the support. After one of these positions have been selected, the leading portion of the element is anchored in the hole.

Abstract: A first element is adapted to be received and anchored in a hole of a structure, and a second element has a first portion located in the hole and secured in the first element, and a second portion having a part which extends outwardly from the hole and is adapted to carry an object at a distance from the structure. An axially yieldable protective sleeve surrounds the afore-mentioned part of the second portion intermediate the structure and the object in sealing contact with both, so as to prevent the access of corrosion-producing media to the elements.

Abstract: A device comprises a sleeve-shaped mounting element receivable in a hole of a structure which has a transverse dimension less than the transverse direction of the hole so as to form a circumferential recess between the mounting element and the hole. The mounting element has a central bore and a transverse bore communicating the central bore with the circumferential recess. An adapter element is inserted in the central bore of the mounting element and has a further bore adapted to communicate with a source of a hardenable binding material and the transverse bore of the mounting element so as to establish a path for passage of the binding material from the source into the circumferential recess to be hardened in the latter and to thereby anchor the mounting element in the hole of the structure.