FIELD: machine engineering.
SUBSTANCE: metal fastener contains an expanded head and a smooth barrel for engaging with the structure and located along the axis of rotation. The surface of the smooth barrel comprises, around the noted smooth barrel, at least one alternating conductive portion and at least one alternating lubricating portion. At least one conductive portion extends along the length of the smooth barrel, and at least one noted lubricating portion extends along the entire length of the smooth barrel, a lubricant is applied to the noted lubricating portion.
EFFECT: increased possibility of conducting electricity in all layers of the structure.
11 cl, 7 dwg
SUBSTANCE: threaded joint for pipes (the first version) comprises a rod (100) and a body (200) elements. The rod element has a thread adapted for matching with the body element. The thread shape and the rod and body elements shape are determined by the thread profile, where the thread surface has a coating. This coating contains the first layer (24) with high friction and antiscoring properties, applied onto the whole surface of the rod element (100), and the second layer (25) with low friction properties applied into separate parts of the surface of either only the rod element, or only the body element. The threaded joint for pipes (the second version) comprises a rod (100) and a body (200) elements. The rod element has a thread adapted for matching with the body element. The thread shape and the rod and body elements shape are determined by the thread profile, where the thread surface has a coating. This coating contains the first layer (24) with high friction and antiscoring properties, applied onto the whole surface of the body element (200), and the second layer (25) with low friction properties applied onto separate parts of the surface of either only the rod element, or only the body element.
EFFECT: increased efficiency of the structure operation, its resistance to corrosion.
48 cl, 12 dwg
FIELD: machine building.
SUBSTANCE: procedure for making threaded connection consists in filling space between threaded surfaces with intermediate material. Further, items are partly connected by threaded surfaces with not-hardened state of intermediate material. Upon intermediate material hardening items are finally connected with tightening force.
EFFECT: simplified process of making threaded connection at levelling forces acting onto turns of thread at tightening.
FIELD: machine building.
SUBSTANCE: invention relates to the securing screw; the screw contains the metal main part of the body, at that the securing screw, at least, is partially painted. The securing screw containing the main part of the body out of carbon steel, that at least is partially painted, also contains a cathode protecting layer applied to the metal main part of the body; the difference is that it contains also two or more paint coating layers, at that the primer layer includes component that increases the corrosion resistance, and layer of pre-treatment located under the mentioned primer layer.
EFFECT: invention increases durability of the securing element, and hence, structure made with its use.
17 cl, 5 dwg
FIELD: machine building.
SUBSTANCE: invention relates to finishing jobs, particularly, to sealing of structural rod outer free end. Structural element comprises shaping main case. The latter comprises main part with first cavity to accommodate outer end free part and second main part with main cavity to accommodate outer end free part. Besides it comprises relatively flexible peripheral case of bitumen or plastic of wall lining attached tightly to at least, in fact, main case to extend sideways therefrom. Note here that a liquid barrier is arranged between said main case and free outer end. It differs from know designs in that second main part forms open space above outer free end. Note also that said liquid barrier comprises seal nut squeezed between outer free end and second main part for hermetic seal of open space.
EFFECT: guaranteed integrity and tightness.
SUBSTANCE: assembly screw (100, 200) for fixation of fittings elements, in particular, hinged elements to multi-chamber sections, has a threaded element with an outer thread, length of which is more than the distance between two adjacent walls of the multi-chamber section. The assembly screw (100, 200) comprises a front part (1), when looking in screwing direction, which has a thread (3) and is made preferably from metal, and a rear part (2) of heat insulation material, for instance, plastic. The front part (1) has a tail (5), inserted into the rear part (2) and comprising at least one locking surface (7, 8). The front part (1) and the rear part (2) are connected to each other by means of geometric closure.
EFFECT: invention prevents development of unwanted cold bridges.
8 cl, 5 dwg
FIELD: engineering industry.
SUBSTANCE: adhesive material supply device consists of a material supply tip and a coat apply nozzle, wherein the tip consists of adhesive material supply channel ending at the first end of the tip in central hole of the nozzle. Tip is made so that it can accept nozzles of various sizes. Tip and nozzles are equipped with fasteners. Nozzle is made in the form of a bell around central hole.
EFFECT: effect achieved when using the nozzle according to invention consists in the fact that easier application is provided, and obtained nozzles are modular and can be cleaned easily without using any solvents.
7 cl, 7 dwg
SUBSTANCE: self-tapping screw consists of low-strength, iron-free material, with a screw body which, at least, on sections is fitted with a coating. The coating is made of elastomeric or polymeric material enriched with fillers.
EFFECT: simplification of manufacture of the screw without loss of its properties.
6 cl, 1 dwg
SUBSTANCE: self-tapping chipless screw with a tail equipped with sections, thread, at one end of which there is a sharpened end, and on its other opposite end there is a screw head, and with a sharpened conical section, arranged starting from the sharpened end towards the screw head, and with one cylindrical section arranged between the sharpened conical section and the screw head. The sharpened end of the screw has the diameter (Dt) within the limits between 0.25-0.35 mm, the sharpened conical section adjacent to the screw spike relative to the bottom of the thread groove between the turns forms a sharp angle α within the limits between 20°-30°, and the initial point of the thread opposite relative to the screw head is distanced from the spike by the distance (Lt) from 0 to 0.3 mm.
EFFECT: penetration of a screw via a material without formation of chips.
4 cl, 2 dwg
FIELD: machine building.
SUBSTANCE: screw anchor for fastening wood structure elements on concrete has rod (1) with first thread section (2) with screw thread (6) for screwing in wood and second thread section (3) with screw thread (7) for screwing in concrete; also, screw thread (6) for wood has equal or rather less pitch (p2), than pitch (p1) of thread (7) for concrete.
EFFECT: screw anchor withstanding higher stretching, bending or cross loads.
11 cl, 7 dwg
FIELD: machine building.
SUBSTANCE: invention relates to fixture elements. Self-cutting and thread-shaping screw includes screw body, point, implemented at one end of screw, and place of application of force for passing of rotational moment, implemented at the other end of screw. Screw body consists of threaded section to which from one side adjoins point of screw and free from thread, containing the place of application of a force section, which adjoins to threaded section from its remote from point of screw side. Threaded section consists of in essence cylindrical bar and thread-shaping thread. At threaded section in remote from the point of screw area it is implemented rod-shaped section with polygonal section of rod, which by its angles specifies envelope circle with diametre, exceeding diametre of rod free from thread of rod-shaped section.
EFFECT: screw can be screwed with minor rotational moment of screwdriving, it is simplified its fabrication method at providing of high accuracy of manufacturing.
10 cl, 4 dwg
FIELD: instrument making.
SUBSTANCE: invention relates to fasteners. The proposed fastener comprises the head and body. The said body consists of several cylindrical sections, with equal and/or unequal length and unequal diametre. The diametre of every subsequent section of proposed fastener gets smaller by proportionality factor Kp = 1.618. The fastener head can vary in compliance with current standards.
EFFECT: higher reliability.
SUBSTANCE: screw comprises head and rod with spearhead. Helical threads are arranged on the rod outer periphery. The rod includes the first section comprising the said spearhead and the second section comprising head. Multiple cutting edges depart from the rod first section outer periphery and serve to cut object fibres and to remove remaining particles upward. The second section comprises multiple grooves arranged in the rod to receive the said remaining particles.
EFFECT: ease of screwing in object, protection of object against damage by remaining particles.
9 cl, 8 dwg
SUBSTANCE: screw for solid materials, e.g. concrete or stone-work, comprises a screw body, screw head, screw front edge and thread with cutting teeth. Aforesaid cutting teeth are in turns shifted L.H. and R.H. from imaginary center line. This side thread surface feature alternating ledges and recesses. Aforesaid thread features adjoining teeth shifted in turns sideways.
EFFECT: ease of manufacture, ease of screwing in and higher retaining strength.
12 cl, 5 dwg
SUBSTANCE: screw has threaded rod with element of force application for transfer of torque and conical end. Threaded rod consists of cylindrical rod and profile-shaping thread itself. Thread is arranged as relief that passes along screw line on cylindrical rod, and the relief is limited with two side walls that meet in external threaded edge, with height (H) that is measured in radial direction from cylindrical rod to threaded edge. Thread has, in zones of wave crests of threaded edge that are not interrupted with bends, accordingly, preset, formed between the side walls, the first angle (α) of profile, and in the deepest zone of threaded edge wave cavities - the second angle (α') of profile. At least one of two sides of thread, at least on part of area between cylindrical rod and threaded edge, as evident in radial profile, is arranged as concave so that the first angle (α) of profile is less than angle (αF) of sides, which is available between imaginary straight lines (FG) of sides and determined, accordingly, with thread base (GF) and threaded edge.
EFFECT: lower screwing torque.
27 cl, 15 dwg
SUBSTANCE: screw for wood and plastic has a head, an almost cylindrical body, a tip and thread running along the body to the tip including the tip zone. The thread has a working surface on the tip side and on the head side. The angle of the working surface on the head side is wider than the one on the tip side. The angle of the working surface on the tip side remains approximately the same in the body zone as well as in the tip zone, whereas the angle of the working surface on the head side in the tip zone is wider than in the body zone. All of the mentioned angles of the working surface are measured with respect to the radial plane.
EFFECT: screw is easy to manufacture and shows normal values of its pulling.
14 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: invention relates to screw. Screw with the threaded rod has an area of force application to transfer torque and a sharp end. The threaded rod consists of a cylinder rod and a self-tapping thread. Thread is made as a screw-line groove with radial height; groove is limited by two side faces converging to the external thread edge. At least, at one thread section, external thread edge comes in radial direction in a wave-form with the certain amplitude between vertexes with height of thread and valleys with height decreased by amplitude. At least, in the area of one side face, in the area of thread edge valleys, the thread has deepenings which intermit the side face and are externally limited by the thread edge. In the areas of thread edge vertexes not intermitted by the deepenings, thread has a certain angle of thread, formed by the side faces. Thread has another angle of thread at the deepest areas of threaded edge valleys. The first thread angle between the thread side faces is within the rage of 30° to 35°, while the second thread angle (α') is 30° up to 58° (maximal value).
EFFECT: reduction of screwing torque while keeping unscrewing torque high.
19 cl, 9 dwg
SUBSTANCE: invention relates to composite materials and deals with a device for the protection of composite materials against electromagnetic influence. A hardening flexible resistant to electromagnetic influence laminate includes a layer of an electroconductive metal material and a thermoresponsive polymer, in which the outer surface of the laminate includes a detachable sheet of a substrate in contact with the polymer, and the laminate additionally includes a practically non-transformable sheet of a solid material.
EFFECT: invention provides the creation of the laminate, resistant to an electromagnetic influence, which does not stretch and transform under high loadings, produced by an automatic device for the tape placement.
17 cl, 13 dwg, 1 tbl, 6 ex