WO2004083769A1

WO2004083769A1 - Portable device for the ejection of tear gas

Info

Publication number: WO2004083769A1
Application number: PCT/GR2004/000016
Authority: WO
Inventors: Dionisios Kapanos
Original assignee: Dionisios Kapanos
Priority date: 2003-03-17
Filing date: 2004-03-17
Publication date: 2004-09-30
Also published as: GR1004540B

Abstract

This invention is a mild repressive means of defense consisting of the bottle (1) housed in a casing (4) a flexible pipe (5) connecting the bottle (1) to the ejector system attached to the user’s lower arm with a fastening strap (12).

Description

PORTABLE DEVICE FOR THE INJECTION OF TEAR GAS

The invention involves a device for the ejection of tear gases with alternative solutions for its support and holding, which bears an indication manometer as well as a projected flexible pipe for an easy direction of the ejected fluid. This device consists of the main bottle which gets the chemical substance under pressure the content of which is quantitatively shown by the manometer indicator when the central switch is on, of a fabric or plastic case which holds and protects the bottle and which bears the support belts, and of a prolonged flexible pipe of high pressure which bears on the one hand the support and direction system and on the other hand the second switch of quick pressure for the extraction of the ejected fluid.

The bottle of this device has common construction features with the oxygen and acetylene bottles or with the depth bottles or the bottles of medical support, except for the fact that it has a lower capacity but a high pressure as it is intended to resist up to 300 atmospheres at least.

Figures -1-, -2-, -3- and -4- show the whole device as well as its components.

Analysis of the figures and principle of operation

The bottle (1) has a cylindrical form so that its internal pressure is isomeric, and on its upper part it bears the general switch (2), figure -1-. When switching it on (2), the pressure appears on the manometer (3) provided that the other part of the circuit is off and tight.

The bottle (1) is placed in the protective case (4), which bears the belts (4a) with the operator's hands getting through them up to the height of the shoulders so that the bottle rests in the centre of his back, its weight being equally distributed to the rest of his body, while the parts of the belt (4b) are tied around the operator's waist. Due to the special use the bottle is intended for (emergency conditions) as well as the protection it must provide by priority to the operator (policemen), the material of which it is constructed as well as the protection (due to the conditions of use) provided to this bottle are of great importance.

The protection provided by the case (4) to the bottle (1) is very important as it protects it both from the solar radiation so that its internal pressure does not rise following the rise of the temperature and from violent shocks which, in case of sound tuning, could even result in the breaking of its walls. For this reason, the bottle is made of aluminum alloy, which offers double protection, namely: a) Due to the material, it is not subject to external or internal oxidization from the condensation of atmospheric air in the bottle at the time of recharging. b) Due to the natural tone of the aluminum, it receives the least absorption from the sunlight and therefore it is less heated compared to other bottles which, due to their colour are heated more and sooner while, on the other hand, due to their high carbon content in their material (iron) they are subject to oxidization resulting to the quick wearing of the metal.

The flexible high pressure pipe (5) with the proper equipment, at its one end is connected with the manometer connection (the manometer is covered by a protective cover); the pipe is vertically extended to the right or to the left of the bottle (depending on the used hand) and its length is the one required in order to curve and to follow a horizontal course parallel to the operator's counter-arm, while its other end is connected with the rigid pipe (6), figures -1- and -2-. The pipe (6) bears on the one hand the lever arm (7) which is held by the hand, and on the other hand it bears the counter brace (8) in the shape of a circumference arc so that it follows the curve of the lower part of the operator's counter-arm, figure -2-, because the purpose of holding the ejection unit is to use only one hand.

The other end of the pipe (6) is connected with the inlet of the quick use switch (9) bearing the hand-lever (9a) which, when not used, is tied by the lock (10), figures -2-, -3- and -4-, and a small part of the pipe which bears the nozzle (11) is extended out of the switch outlet. However, the quick use switch (9) can be directly connected with the switch outlet (2) when the operator wishes to hold the device under his arm. When used in this way [when the extension (5) as well as the rigid pipe (6) are removed] the total weight of the device is diminished.

The operation of the system When the general switch (2) is turned on, the pressure of the bottle is delivered up to the inlet of the shut switch (9) while the pressure rate is shown by the manometer indication. When the operator is at a position of shot holding with his hand the hand-lever (7), the lower part of his counter- arm fits in the socket of the counter brace (8), figure -2- When he unlocks the lock (10) and turns the hand-lever (9a) of the quick use switch (9) by one fourth (%) of a turn, then a power is developed by the tear gas, which is under pressure, equal and opposite in direction to the propulsion power of the fluid pushing the ejection system backwards. However, as the muscular power of the resistance through the lever arm (7) which tends to act axially is not in a perfect axial parallel with the pivot of the acting power of the ejected fluid, a component is developed acting along the axe of the vertical position of the operator's arm (B) through the contact between the counter-arm (A) and the counter-brace (8), and therefore we have two points where the resistance power lies upon, such as from the hand to the lever arm (7) and from the vertical resistance of the arm (B) to the counter- brace (8) where the ejector's backward thrust is reduced.

The counter-brace (8) is adjustable on the rigid shaft (6) so that this can get the most ideal position as regards its fitting and the point of support on the operator's counter-arm (A). When adjusted at a certain point, it is stabilized by a clamp and by using the belt (12) which covers the operator's counter-arm (A), the ejector can follow the movements of the one hand (right or left) and the ejection system may be available when needed without the operator being obliged to hold the lever-arm (7) constantly with his hand; the ejection system also has a holding mount so that the ejector may also be hung in the middle of the policeman's uniform.

Claims

1. Portable device for the ejection of tear gas with an indication of pressure and a system of alternative support of a flexible direction pipe, consisting of a metal bottle, fitted in a case, and of a supply pipe connected with the ejector and characterized by the fact that the metal bottle (1) of high pressure is of low thermal absorption due to reflex and non oxidizable by the liquefied atmosphere following condensation, and by the fact that it bears a central switch (2) with a manometer (3) for the indication of pressure with a safety cover, and by the fact that the bottle is accompanied and secured by a shock-absorbing fabric or plastic case (4), and by the fact that the case has belts (4a) and (4b) for tighting and supporting the bottle unit in the middle of the operator's back, and by the fact that the system is accompanied by a flexible pipe (5) of high pressure which connects the bottle unit with the ejector system, the ejector consisting of the rigid pipe (6) which bears on the one hand the lever-arm (7) and on the other hand the counter brace (8), as well as of the quick use switch (9) with its hand lever (9a), and by the fact that when out of operation, the hand lever (9a) is secured by the lock (10), and by the fact that the counter brace (8) may be of an adjustable position on the pipe (6) while its final position is stabilized by a clamp, and by the fact that the purpose of the counter brace (8) is to hold the operator's counter-arm (A) thus creating a second point of resistance with the grip on the lever-arm (7) resulting to the reduction of the ejector's backing by the time the ejected fluid gets out of the nozzle (11), and by the fact that, by using the belt (12) which covers the counter-arm (A) the ends of which end at the counter brace (8), the permanent support of the ejector system on the other or the other operator's hand is ensured when he is not in a position of shot, without him being obliged to hold the ejector from the lever-arm (7) all the time , and by the fact that the ejector may be hung from the middle of the operator's uniform by bearing a link, and by the fact that, whenever it is necessary to hold the system under the arm, then the- quick use switch (9) may be directly connected with the switch outlet (2) avoiding parts (5) and (6).