Egoza Razor Tape

Ukrainian Patent №145124 – Egoza razor tape

The patent of Ukraine: №145124
Author: Tkachenko Yuriy Vladimirovich
Section of the IPC: B21F 25/00 – Barbed wire, mesh, fencing, wire fabrics
Published: 25.11.2020, Bulletin №22/2020

Egoza razor tape, obtained from a metal tape, contains a central section and a large number of opposite pairs of elements that are integrally formed with it, and the pairs of elements are evenly located along the central section of the tape, and each element in a pair consists of a base and opposite to the directions of the thorns made from the outer sides of the element, while between the sides of the elements located next to pairs of elements, an internal wide space is formed, which is bounded from the outside by the tips of the teeth of these elements, according to the utility model, in the inner wide space there are additional opposite pairs of striking elements, which are also integrally formed with the central section, but have a lower base height, which form the second tier of striking elements.

The invention relates to hardware production, namely the production of Egoza razor tapes, which are used for the construction of security barriers designed to prevent unauthorized entry into secure facilities. Known Egoza razor wire, which is obtained from a metal tape containing a central section and a large number of opposite pairs of elements, integrally formed with it, and pairs of elements are located along the central section of the tape evenly, and each element in a pair consists of a base and oppositely directed teeth , made from the outer sides of the element, while between the sides of the elements located next to pairs of elements, an internal wide space is formed, externally limited by the tips of the teeth of these elements. The central section of the tape is reinforced with a central spring wire, mainly of circular cross-section, which is fixed and held on it by the rolled edges of the same central section of the Egoza barbed tape [see. pat. Ukraine No. 33526 for class B21F 25/00, published on June 26, 2008 in Bul. No. 12].

The main significant disadvantage of the known technical solution is the low damaging ability of the Egoza razor tape, due to the location of the meeting of the directed teeth at the same level. If the violator's clothes get caught between the teeth and catch on the sharp teeth, it is quite simple to free him from the teeth: it is enough to pull the clothes from one tooth and then release from the other. This is due to the fact that the opposite pairs of teeth are at a certain distance and have a certain space between them, in which there are no mechanical obstacles to arrest the offender by the clothes.

As the closest analogue, a light barrier was chosen, which consists of an Egoza razor tape obtained from a metal tape that contains a central section and a large number of opposite pairs of elements, integrally formed with it, and pairs of elements are evenly located along the central section of the tape, as well as each element in the pair consists of a base and oppositely directed spikes, which are made without gaps between the striking elements, using the same type of ellipsoidal leaks touching the lateral sides and additionally deployed in the radial direction relative to each other at an angle of about 45° [see. pat. Russian Federation No. 85107 for class B21F 25/00, published on July 27, 2009 in Bul. No. 21].

Despite the fact that this light barrier has a volumetric structure due to the rotation of the elements along its longitudinal axis, the striking properties of the Egoza razor tape by just such a rotation are minimized, since each element is rotated 45° relative to the previous one, and in principle there are no counter-directed spikes. and, consequently, when clothes catch on one spike, it is easy to remove the clothes from the spike, without even getting hurt. That is, this light barrier has low retention properties, which is its significant technical drawback.

The basis of the invention is the task of increasing the protective properties of the Egoza razor tape by endowing the internal space between the striking elements with a second tier of striking elements with oppositely directed thorns, but located lower than the spikes of the main striking elements, by fundamentally changing the design of the Egoza razor tape.

The problem is solved by the fact that in the Egoza razor tape, which is obtained from a metal tape containing a central section and a large number of opposite pairs of elements, integrally formed with it, and the pairs of elements are evenly located along the central section of the tape, and also each element in a pair consists of the base and oppositely directed spikes made from the outer sides of the element, while between the sides of the elements of adjacent pairs of elements, an internal wide space is formed, which is bounded outside by the edges of the teeth of these elements, according to the invention, in the inner wide space there are additional opposite pairs of striking elements, which are also integrally formed with a central area, but have a lower base height and form another tier of striking elements.

The central section of the Egoza razor tape can be reinforced with a central spring wire, mainly of circular cross-section, which is fixed and held on it by the rolled edges of the same central section of the tape.

The use of an internal wide space for placing additional low-height striking elements in it does not in any way increase the dimensions of the Egoza razor tape, in particular, its width.

The presence of the second tier of striking elements increases the likelihood of arresting the offender, since, as practice shows, towards the directional thorns on different tiers significantly complicate the release of clothing stuck between them, since the distance between the thorns is very limited, and their location in different tiers does not impede the release movement, since they remain still spikes in the upper tier.
Thus, the combination of essential features obtained due to the location of additional striking elements in a wide space between the main striking elements in the new tier, provides an increase in the retarding properties of the proposed Egoza razor tape, and, consequently, the solution of the task.

The further essence of the proposed technical solution is explained together with the illustrative material, which shows the proposed Egoza razor tape without reinforcement of the central section (Fig. 1) and with reinforcement of the central section with a spring wire (Fig. 2).


The proposed Egoza razor tape is obtained from the metal tape 1 by stamping the striking elements 2 of the first (outer) tier and striking elements 3 of the second (inner) tier. The central area 4 and the striking elements 2 and 3 are integral structures. In this case, the striking elements 2 and 3 are evenly located along the central section 4 of the tape 1. Each striking element 2 or 3 consists of a base 5 and oppositely directed spikes 6. Between the sides of the striking elements 2 located next to each other, an internal wide space is created in which the striking elements of the 3 lower tier.

The central section 4 of the Egoza razor tape can be reinforced with a central spring wire 7, mainly of circular cross-section, which is fixed and held on it by the rolled edges of the same central section 4 of the tape 1.

Egoza razor tape of the proposed design is used as follows.

An obstacle is made of Egoza razor tape, which is fixed on the ground or on poles. Spring wire 7 allows you to obtain a volumetric structure of the fence, in the case when the central section 4 is reinforced with it. When an attempt is made to violate a secure fenced object, the spikes 6 located at different levels reliably capture the offender's clothing and significantly complicate its release, since the counter-directed spikes 6 on different tiers, together with thorns 6 on the upper tier, do not form a free space between the striking elements 2 and 3. Thus, the proposed Egoza razor tape more reliably prevents the possibility of penetration into a secure facility due to its higher engagement ability.

A significant difference between the proposed technical solution, in comparison with the previously known ones, lies in the fact that the spikes of the striking elements are located oppositely directed at different levels, and the inner tier of the striking elements is located in the space between the striking elements of the outer tier, which allows you to keep the overall dimensions of the Egoza razor tape with a simultaneous increase in retention properties. None of the known Egoza razor wires don’t have these properties, since they do not have two-tiered striking counter-directed spikes in their composition.

The proposed technical solution has been tested in practice. Egoza razor tape does not contain a single element that could not be reproduced at the modern level of development of science and technology, in particular in the field of manufacturing protective fences from Egoza razor tape, and, therefore, is considered industrially applicable. In the patent and scientific and technical literature, no such Egoza razor tapes were found, with a set of essential features that provided it with new useful properties, and, therefore, the proposal is considered new.

The technical advantages of the proposed technical solution, in comparison with the closest analogue, include the following:

  • increase in damaging properties due to the presence of a second tier of counter-directed spikes;
  • preservation of the overall dimensions of the Egoza razor tape (width) due to the fact that the second tier of damaging elements is located in the inner space between the damaging elements of the outer layer.

The social effect from the implementation of the proposed technical solution, in comparison with the use of the closest analogue, will be obtained by enhancing the protective properties of the Egoza razor tape.

Utility Model Formula

  1. Egoza razor tape, which is obtained from a metal tape containing a central section and a large number of opposite pairs of elements, integrally formed with it, and the pairs of elements are evenly located along the central section of the tape, and each element in a pair consists of a base and oppositely directed spikes , made from the outer sides of the element, while between the sides of the elements located next to pairs of elements, an internal wide space is formed, externally limited by the tips of the teeth of these elements, characterized in that additional opposite pairs of striking elements are located in the inner wide space, which are also integrally formed with central section, but have a lower base height, form another tier of striking elements.
  2. Egoza razor tape according to claim 1, characterized in that the central section of the Egoza razor tape is reinforced with a central spring wire, mainly of circular cross-section, which is fixed and held on it by the rolled edges of the same central section of the tape.
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