Cleaning cord with scraping ridges

Abstract

The invention relates to a cleaning cord (100) for cleaning the inner surface of the barrel of a firearm, in particular a rifle, the cord having an elongate core strand (110), in particular a steel wire rope, with a front end (111) in relation to a pulling direction (Z) and a rear end (112) in relation to the pulling direction (Z), a fabric sleeve (130) receiving the core strand (110), an elastic core sheath (120), which is arranged radially between the core strand (110) and fabric sleeve (130), is divided into axial portions (121a, 121b, 121c), and has elongate scraping ridges (122) associated with a corresponding axial portion (121a, 121b, 121c), at least two of the scraping ridges (122) of the same portion (121a, 121b, 121c) being arranged at a uniform distance from one another in the circumferential direction (U) of the core sheath (120), the scraping ridges (122) running parallel to the core strand (110) and / or being arrangeable parallel to the pulling direction (Z).

Description

[0001] Cleaning cord with friction bars

[0002] The invention relates to a cleaning cord for cleaning the inner surface of a firearm, in particular a rifle, comprising

[0003] - an elongated core strand, in particular a steel wire rope, with a front end with respect to a pulling direction and a rear end with respect to the pulling direction,

[0004] - a fabric tube that holds the core strand,

[0005] - an elastic core sheath arranged radially between the core strand and the fabric hose and divided into axial sections, with elongated friction webs assigned to a respective axial section, wherein at least two of the friction webs of the same section are arranged at regular distances from one another in the circumferential direction of the core sheath.

[0006] Devices for cleaning the inner surface of a firearm's barrel, so-called cleaning cords, are required to remove residues from the barrel that accumulate on the inner surface of the barrel during use. These devices are also used to apply a lubricant to the inner surface of the barrel, thereby preserving it and preventing corrosion, for example, when a firearm is not used for an extended period.

[0007] Such cleaning cords usually have a core strand, particularly a rope, wire, cable, or cable, as their cleaning element, which is covered by a plastic core sheath. The outer diameter of the core sheath is dimensioned such that when the cleaning cord is pulled through, friction is generated on the inner surface of the barrel, which mechanically removes unwanted residue. The core sheath is, in turn, surrounded by a textile sleeve, e.g., a fabric hose, which can hold cleaning fluid, for example. Connections, e.g., threaded fittings, are provided at both ends of the cleaning cord, to which additional devices such as handles, brushes, sponges, cloths, adapters, etc., can be attached.

[0008] EP 2491 331 B1 discloses a gun cleaning cord with moistening and cleaning units. The cleaning units for generating friction with the barrel are appropriately dimensioned hard rubber balls formed from the core sheath. According to DE 10 2013 222 761 A1, the friction of the gun cleaning cord is provided by radial projections along the core sheath made of a rubber polymer. The projections are designed as interrupted elevations in the manner of a helical line, so that the core sheath rotates when the cleaning cord is pulled through the barrel.

[0009] For thorough cleaning, it's advantageous if the friction surface between the inner surface of the barrel and the cleaning cord is as large as possible. For easy cleaning, however, it's advantageous if the pulling force required for the cleaning process is as small as possible and applied evenly.

[0010] It is the object of the present invention to eliminate the disadvantages of the prior art and to provide a cleaning cord that enables simple yet as thorough a cleaning of the inner surface of a barrel.

[0011] The object is achieved by a cleaning cord according to claim 1.

[0012] A cleaning cord according to the invention of the type described in more detail at the outset is characterized in that the friction webs run parallel to the core strand and / or can be arranged parallel to the pulling direction.

[0013] During use, the elongated core strand aligns in the firearm barrel in the direction of pull, so that the longitudinal axis of the core strand coincides with the direction of pull. The friction ribs tension the fabric hose to a desired outer diameter of the cleaning cord, thereby ensuring contact between the fabric hose and the inner surface of the firearm barrel to be cleaned. The outer diameter of the cleaning cord is selected such that the friction ribs provide a friction surface, at least in some areas, on or with the inner surface of the barrel. The elongated design of the friction ribs allows for a large friction surface to be created, which, thanks to their quasi-streamlined alignment along the direction of pull, can be pulled through with comparatively little force.Streamlined friction bars are also more durable than those aligned perpendicularly or diagonally to the direction of pull, because the friction forces acting on the friction bar are applied at the point of greatest stiffness. Bending or other wear of the friction bars is better prevented.

[0014] Advantageous embodiments are claimed in the subclaims and are explained in more detail below.

[0015] In an advantageous embodiment, the friction webs of two adjacent axial sections are arranged offset from one another along the circumferential direction.

[0016] The staggered arrangement of the friction ribs ensures that the entire inner surface of the barrel can be mechanically machined and thus cleaned, despite their narrow design. Furthermore, the staggered arrangement creates spaces between the friction ribs where the removed dirt can be collected by the fabric sleeve and removed from the barrel.

[0017] In an optional development of the invention, the friction webs of two adjacent axial sections are arranged offset from one another along the circumferential direction by a circumferential angle between 20 and 180°.

[0018] The regular arrangement of the friction bars along the circumferential direction ensures even and residue-free cleaning.

[0019] Preferably, the friction webs of two adjacent axial sections are arranged offset from one another along the circumferential direction by a circumferential angle between 40° and 60°.

[0020] Circumferential angles of 40° and 60° have proven sufficient to ensure adequate cleaning of the inner barrel surface. At the same time, such a circumferential angle minimizes the complexity of the core sheath, enabling cost-effective production.

[0021] The friction webs of two non-adjacent axial sections are arranged in alignment with each other along the circumferential direction for particularly thorough running cleaning.

[0022] An aligned arrangement means that the friction surfaces of the aligned friction bars lie in the same plane, or rather, that the longitudinal axes of the friction bars are imaginarily parallel to the longitudinal axis of the cleaning cord. For example, if five friction bars are aligned, the same spot on the inner surface of the barrel is rubbed five times, thus mechanically cleaning five times in succession with a single pass of the cleaning cord through the firearm barrel.

[0023] Preferably, each axial section has exactly three friction ridges. If the friction ridges of two adjacent axial sections are offset by a circumferential angle of 40°, the friction ridges of every third axial section are aligned with each other. If the friction ridges of two adjacent axial sections are offset by a circumferential angle of 60°, the friction ridges of every second axial section are aligned with each other.

[0024] To further reduce the force required to pull the cleaning cord through, each friction bar has a bevel at at least one end. Preferably, the leading end of the bar in the direction of pull is quenched to create a chamfer for continuously building up friction between the friction bar or the friction surface of the friction bar and the inner surface of the barrel.

[0025] Further details, features, feature (sub)combinations, advantages and effects based on the invention will become apparent from the following description of a preferred embodiment {or examples} of the invention and the drawings. These show in

[0026] Fig. 1 is a schematic diagram of a first exemplary cleaning cord of the invention, in

[0027] Fig. 2 Sectional views AA, BB, CC from section planes according to Figure 1 , in

[0028] Fig. 3 is a sectional view of a front and / or rear connection and, in

[0029] Fig. 4 a schematic diagram of an exemplary friction web.

[0030] The figures are merely exemplary and serve only to clarify the invention. The same elements are designated by the same reference numerals.

[0031] Figure 1 shows a first exemplary embodiment of a cleaning cord 100 according to the invention for cleaning the inner barrel surface of a firearm (not shown), wherein the schematic diagram is shown enlarged in the radial direction R. For this purpose, the outer diameter D of the cleaning cord 100 corresponds to an inner diameter of the firearm. An elongated core strand 110 provides the required tensile strength to pull the cleaning cord 100 through the firearm barrel, even against frictional resistance. The core strand 110 can be a steel wire rope with a diameter of approximately 1.5 mm and a PVC sheath (not shown). At a front end 111 with respect to a pulling direction Z, a connection 116 is arranged, for example, for a handle (not shown). At a rear end 112 with respect to the pulling direction Z, a further connection 117 for sponges, cloths, brushes, etc. (not shown) is arranged.The core strand 110 is preferably covered over its entire length by a fabric hose 130. The fabric hose 130 has a heat-resistant textile fabric that can withstand oil, for example, at a temperature of 250°C. The fabric hose 130 is supported in the region of a central cleaning cord section 114 by an elastic core sheath 120 of the core strand 110, which is arranged between the core strand 110 and the fabric hose 130 with respect to the radial direction R. With respect to the longitudinal axis L of the cleaning cord 100, the core sheath 120 is arranged in the region of a central cleaning cord section 114. The front cleaning cord section 113, i.e. the section between the front connection 116 and the core sheath 120 orThe middle cleaning cord section 114 preferably corresponds at least to the length of the firearm barrel to be cleaned, so that this section 113 can be guided through the firearm barrel before attaching a handle. The rear cleaning cord section 115, i.e., the section between the rear connector 117 and the core sheath 120, can be shorter accordingly.

[0032] The core sheath 120 is, for example, 25 cm long and divided into axial sections 121a, 121b, 121c, here, for example, 15 axial sections 121a, 121b, 121c. Each axial section 121a, 121b, 121c has at least two friction webs 122. The friction webs 122 are arranged parallel to the core strand 110 and / or parallel to the pulling direction Z. The core sheath 120 is preferably formed in one piece and can either be injection-molded directly onto the core strand 110 or manufactured separately, for example by injection molding, and then assembled with the core strand 110. For assembly, the core sheath 120 has a longitudinal slot (not shown), which preferably runs parallel to the longitudinal axis L of the cleaning cord 100. The core sheath 120 is preferably made of corrugated oil and heat-resistant elastic rubber with a Shore hardness of 65.

[0033] Figure 2 shows three sections through three consecutive axial sections 121a, 121b, 121c. Each axial section 121a, 121b, 121c has exactly three friction webs 122. The friction webs 122 of two adjacent axial sections, i.e. 121a adjacent to 121b, 121b adjacent to 121c, and 121c adjacent to another section 121a, are arranged along the circumferential direction U with a circumferential angle <t>arranged offset by 40° from one another. In every third section, the friction webs 122 are aligned. This means that the friction webs 122 are arranged with respect to the circumferential direction U such that the friction surfaces 128 of the friction webs 122 lie in a plane or parallel to the longitudinal axis L of the cleaning cord 100. The friction webs 122 have a semicircular cross-section 127 perpendicular to the longitudinal extent of the elongated friction web 122 with, for example, a semicircle radius of 1.5 mm. The friction surface 128 of the friction web 122 is arranged in the area of ​​the semicircle apex. The friction webs 122 are designed as projections in one piece with a sheathing sleeve 126. The sheathing sleeve 126 has a (not shown) passage, the diameter of this passage corresponding to the outer diameter of the core strand

[0034] 110 (see Figure 1 ), including any PVC sheathing. The outer diameter of the sheathing filler 126 is, for example, 5.9 mm. The longitudinal webs 122 span a circumference to support the fabric hose 130, so that the outer diameter D of the cleaning cord 100 measures approximately 8.05 mm and the (not shown) diameter of the cleaning cord 100, i.e. outer diameter D less the thickness of the fabric hose 130, is 7.9 mm. A cleaning cord 100 dimensioned in this way is suitable for a rifle with a nominal caliber of 7.62, whereby a pulling force of 8-10 kg may be sufficient for a cleaning process.

[0035] Figure 3 shows a brass connection 116,117, as it corresponds to the front end

[0036] 111 or the rear end 112 of the cleaning cord 100 (see Figure 1). Each connection 116, 117 can be divided into a press section 118 assigned to the cleaning cord 100 and a threaded section 119 assigned to a connecting piece (not shown). The connection 116, 117 can have an axial length of 26 mm and an outer diameter of 5 mm. The press section 118 has an inner diameter of 2.8 mm and is pressed onto the core strand 110 (see Figure 1) with a pull-out force of 50 kg. The threaded section 119 extends over a length of 13 mm, with the internal thread of the threaded section 119 being of type 8-32 UNC.

[0037] Figure 4 shows a single friction bar 122, the length of which is 14 mm here. A bevel 125 is provided at a front bar end 123 and at a rear bar end 124. Between the bevels 125, a central section of the friction bar 122 forms the friction surface 128 for friction with the inner surface of the barrel. The length of the friction surface 128 is 8 mm here. While the front bevel 125 at the front bar end 123, in the pulling direction, is intended to reduce the force required to pull through the cleaning cord 100 (see Figure 1), the rear bevel 125 at the rear bar end 124 reduces wear. The bevels 125 can form an angle of 45° with the longitudinal axis L and / or with the friction surface 128. List of Reference Symbols

[0038] 100 cleaning cords

[0039] 110 core strand

[0040] 111 front end

[0041] 112 rear end

[0042] 113 front cleaning cord section

[0043] 114 middle cleaning cord section

[0044] 115 rear cleaning cord section

[0045] 116 front connection

[0046] 117 rear connection

[0047] 118 Press section

[0048] 119 Threaded section

[0049] 120 core sheath

[0050] 121a, 121b, 121c axial sections

[0051] 122 friction bridge

[0052] 123 front end of the bridge

[0053] 124 rear end of the bridge

[0054] 125 Bevel

[0055] 126 Sheathing cover

[0056] 127 Cross section

[0057] 128 friction surface

[0058] 130 fabric hose

[0059] D outer diameter

[0060] L Longitudinal axis

[0061] R radial direction

[0062] U circumferential direction

[0063] Z Pull direction

[0064] <t>Circumferential angle< / t> < / t>

Claims

Patent claims: Cleaning cord (100), for cleaning the inner surface of the barrel of a firearm, in particular a rifle, comprising - an elongated core strand (110), in particular a steel wire rope, with a front end (111) with respect to a direction of pull (Z) and a rear end (112) with respect to the direction of pull (Z), - a tissue tube (130) receiving the core strand (110), - an elastic core sheath (120) arranged radially between core strand (110) and fabric tube (130) and divided into axial sections (121 a, 121 b, 121 c) with elongated friction ribs (122) assigned to a respective axial section (121a, 121 b, 121 c), wherein at least two of the friction ribs (122) of the same section (121 a, 121 b, 121 c) are arranged at regular intervals from each other in the circumferential direction (U) of the core sheath (120), characterized in that the friction ribs (122) run parallel to the core strand (110) and / or can be arranged parallel to the tensile direction (Z).

2. Cleaning cord (100) according to claim 1 , characterized in that the friction ribs (122) of two adjacent axial sections (121a, 121b, 121c) are arranged offset from each other along the circumferential direction (U).

3. Cleaning cord (100) according to claim 2, characterized in that the friction ridges (122) of two adjacent axial sections (121a, 121b, 121c) are arranged along the circumferential direction (U) by a circumferential angle ( <t>) are arranged at angles of between 20° and 180° to each other.

4. Cleaning cord (100) according to claim 2 or 3, characterized in that the friction ridges (122) of two adjacent axial sections (121a, 121b, 121c) are arranged along the circumferential direction (U) by a circumferential angle ( <t>) are arranged offset from each other at angles of 40° to 60°. A cleaning cord (100) according to any one of the preceding claims, characterized in that the friction ridges (122) of two non-adjacent axial sections (121a, 121b, 121c) are arranged in alignment with each other with respect to the circumferential direction (U). A cleaning cord (100) according to any one of the preceding claims, characterized in that each axial section (121a, 121b, 121c) has exactly three friction ridges (122). A cleaning cord (100) according to any one of the preceding claims, characterized in that each friction ridge (122) has a chamfer (125) at at least one end (123).< / t> < / t>

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