GB2119068A - Water guns - Google Patents

Water guns Download PDF

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Publication number
GB2119068A
GB2119068A GB08208126A GB8208126A GB2119068A GB 2119068 A GB2119068 A GB 2119068A GB 08208126 A GB08208126 A GB 08208126A GB 8208126 A GB8208126 A GB 8208126A GB 2119068 A GB2119068 A GB 2119068A
Authority
GB
United Kingdom
Prior art keywords
water
barrel
valve
gun
projected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08208126A
Other versions
GB2119068B (en
Inventor
Henry Watson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WATSON ENGINEERING CONSULTANTS
Original Assignee
WATSON ENGINEERING CONSULTANTS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WATSON ENGINEERING CONSULTANTS filed Critical WATSON ENGINEERING CONSULTANTS
Priority to GB08208126A priority Critical patent/GB2119068B/en
Publication of GB2119068A publication Critical patent/GB2119068A/en
Application granted granted Critical
Publication of GB2119068B publication Critical patent/GB2119068B/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
    • F41H13/00—Means of attack or defence not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
    • B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening
    • B05B1/323—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening the valve member being actuated by the pressure of the fluid to be sprayed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0006—Spraying by means of explosions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0007—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by explosions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B9/00—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure
    • F41B9/0003—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid
    • F41B9/0006—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid the liquid being pressurised prior to ejection
    • F41B9/0015—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the pressurisation of the liquid the liquid being pressurised prior to ejection the liquid being pressurised by compressed gas, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B9/00—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure
    • F41B9/0087—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the intended use, e.g. for self-defence, law-enforcement, industrial use, military purposes
    • F41B9/0093—Liquid ejecting guns, e.g. water pistols, devices ejecting electrically charged liquid jets, devices ejecting liquid jets by explosive pressure characterised by the intended use, e.g. for self-defence, law-enforcement, industrial use, military purposes for riot control, e.g. water cannons therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Technology Law (AREA)
  • Nozzles (AREA)

Abstract

A water gun comprises a barrel 1 having a neck 2 from which water is to be projected, valve means 4 for charging the barrel 1 with water from a tank 5, and means for ejecting the charge of water from the barrel as a single body, thereby obtaining the effect of a high pressure jet of short length. The projected body of water is of high density, that is it does not break up into a diffuse spray. The charge of water may be ejected by, for example, compressed air from a cylinder 8 connected by valve 9 and pipe 6 to the barrel 1, via a spring- loaded valve 3 on the end of the neck 2 which is forced open as the pressure of the water in the barrel rises. Other propellants may be used, e.g. explosive or mechanical, and the water (or other liquid) may alternatively be supplied in a sealed cartridge. <IMAGE>

Description

SPECIFICATION Water gun The present invention relates to a water gun.
Water projecting devices are used for a variety of purposes, for example to project a jet of water against a surface which is to be cleaned, or to project a jet of water into a mob of people which it is desired to disperse.
The efficiency of a water jet for both cleaning and crowd dispersal purposes is a function of jet velocity, cross section and density, the jet velocity being a function of supply pressure. Supply pressures of the order of 100 pounds per square inch are generally used. Higher supply pressures can be used but at the cost of increased complexity. For example a high pressure jet cannot be simply turned on and off instantaneously because to attempt to do so would transmit shock waves through the pressure system.
This effect is generally referred to as water hammer.
In practice supply pressures in excess of 100 psi are not often used, and even at such relatively low pressures water hammer can bea problem.
Thus the available devices project relatively low pressure (and therefore velocity) continuous jets of water. This means that a relatively large volume of water is required for any given purpose. In some applications the use of large volumes of water can cause real problems. For example, water is used to clean the interior of nuclear installations. After use the water is contaminated and must be disposed of in a controlled and expensive manner. Thus any reduction in the volume of cleaning water used would result in significant savings. As a further example, the water guns ("water cannon") used to control crowds must be mobile and therefore must carry with them the water which they are to project.
A reduction in the volume of water which has to be projected to achieve the desired results either increases the effective capacity of the water gun or enables the same effective capacity to be provided in a cheaper and less cumbersome vehicle.
It is an object of the present invention to provide an improved water projecting device which is capable of projecting relatively small volumes of water at high velocity.
According to the present invention there is provided a water gun comprising a barrel from which water is to be projected, means for charging the barrel with water, and means for ejecting the charge of water from the barrel as a single body.
The invention enables "shots" of water to be fired at a target at high velocity, thereby obtaining the effect of a high pressure jet of short length.
Preferably the gun is designed such that the projected body of water is of high density, that is it does not break up into a diffuse spray.
The charge of water may be ejected by a variety of means, for example compressed air. The water may be introduced into the barrel via a pipe from a reservoir.
This specification refers throughout to the projection of water. It will be appreciated however that the invention is equally applicable to the projection of other liquids.
An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing.
The schematically illustrated embodiment com prises a barrel 1 having a neck portion 2 closed by a fast response valve 3. The barrel can be filled with water via valve 4 from a tank 5. As the barrel is filled displaced air is vented via a pipe 6 and valve 7 to atmosphere via air pipe 7a. A compressed air cylinder 8 is connected to the pipe 6 by a valve 9 controlled by a trigger 10 mounted on a handle 11.
The barrel 1 is pivotally mounted on a support 12 which permits pivotal movement about vertical and horizontal axes. The barrel can thus be aimed at a selected target. The water supply pipe connecting the valve 4 to the tank 5 and the pipe 6 connecting the barrel 1 to the compessed air cylinder 8 are flexible to accommodate movements of the barrel.
When the gun is to be fired, assuming that it has already been charged with water, the barrel is aimed at the target and the trigger 10 is pressed, briefly opening valve 9. Compressed air from the cylinder 8 pressurises the water to a pressure of for example several thousand pounds per square inch, and then the valve 9 closes. The valves 4 and 7 are spring loaded non-return valves designed so as to close when the barrle 1 is pressurised. The pressure rise forces open the valve 3 and the charge of water in the barrel is projected as a single body at the target.
The valve 3 is spring loaded and closes automatically after the charge of water has been projected and the pressure within the barrel has fallen to atmospheric. Water from the tank 5 refills the barrel via valve 4. The firing cycle can then be repeated.
The tank 5 can be refilled from any convenient source and the compressed air cylinder 8 can simply be replaced when empty. As the gun projects a body of water at high velocity, the volume of water required for each "shot" can be relatively small.
Accordingly the capacity of the tank need not be very large. The whole apparatus can therefore be carried on a small vehicle. This is important in crowd control applications. Single shots of water can be directed from the vehicle at an individual in a crowd the means and velocity of the shot being such as to dishearten but not maim the target.
It will be appreciated that different shot velocities, voiumes and cross sections may be provided to suit particular applications.
The described embodiment comprises a pneumatically powered single barrel system refilled by free water from a reservoir. It will be appreciated that other propellants could be used, for example explosive or even mechanical arrangements, that the water can be supplied from a tank or in the form of for example sealed cartridges, and that more than one barrel could be provided.
CLAIMS (Filed on 17/3/83) 1. A water gun comprising a barrel from which water is to be projected, means for charging the barrel with water, and means for ejecting the charge of water from the barrel as a single body.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Water gun The present invention relates to a water gun. Water projecting devices are used for a variety of purposes, for example to project a jet of water against a surface which is to be cleaned, or to project a jet of water into a mob of people which it is desired to disperse. The efficiency of a water jet for both cleaning and crowd dispersal purposes is a function of jet velocity, cross section and density, the jet velocity being a function of supply pressure. Supply pressures of the order of 100 pounds per square inch are generally used. Higher supply pressures can be used but at the cost of increased complexity. For example a high pressure jet cannot be simply turned on and off instantaneously because to attempt to do so would transmit shock waves through the pressure system. This effect is generally referred to as water hammer. In practice supply pressures in excess of 100 psi are not often used, and even at such relatively low pressures water hammer can bea problem. Thus the available devices project relatively low pressure (and therefore velocity) continuous jets of water. This means that a relatively large volume of water is required for any given purpose. In some applications the use of large volumes of water can cause real problems. For example, water is used to clean the interior of nuclear installations. After use the water is contaminated and must be disposed of in a controlled and expensive manner. Thus any reduction in the volume of cleaning water used would result in significant savings. As a further example, the water guns ("water cannon") used to control crowds must be mobile and therefore must carry with them the water which they are to project. A reduction in the volume of water which has to be projected to achieve the desired results either increases the effective capacity of the water gun or enables the same effective capacity to be provided in a cheaper and less cumbersome vehicle. It is an object of the present invention to provide an improved water projecting device which is capable of projecting relatively small volumes of water at high velocity. According to the present invention there is provided a water gun comprising a barrel from which water is to be projected, means for charging the barrel with water, and means for ejecting the charge of water from the barrel as a single body. The invention enables "shots" of water to be fired at a target at high velocity, thereby obtaining the effect of a high pressure jet of short length. Preferably the gun is designed such that the projected body of water is of high density, that is it does not break up into a diffuse spray. The charge of water may be ejected by a variety of means, for example compressed air. The water may be introduced into the barrel via a pipe from a reservoir. This specification refers throughout to the projection of water. It will be appreciated however that the invention is equally applicable to the projection of other liquids. An embodiment of the present invention will now be described, by way of example, with reference to the accompanying drawing. The schematically illustrated embodiment com prises a barrel 1 having a neck portion 2 closed by a fast response valve 3. The barrel can be filled with water via valve 4 from a tank 5. As the barrel is filled displaced air is vented via a pipe 6 and valve 7 to atmosphere via air pipe 7a. A compressed air cylinder 8 is connected to the pipe 6 by a valve 9 controlled by a trigger 10 mounted on a handle 11. The barrel 1 is pivotally mounted on a support 12 which permits pivotal movement about vertical and horizontal axes. The barrel can thus be aimed at a selected target. The water supply pipe connecting the valve 4 to the tank 5 and the pipe 6 connecting the barrel 1 to the compessed air cylinder 8 are flexible to accommodate movements of the barrel. When the gun is to be fired, assuming that it has already been charged with water, the barrel is aimed at the target and the trigger 10 is pressed, briefly opening valve 9. Compressed air from the cylinder 8 pressurises the water to a pressure of for example several thousand pounds per square inch, and then the valve 9 closes. The valves 4 and 7 are spring loaded non-return valves designed so as to close when the barrle 1 is pressurised. The pressure rise forces open the valve 3 and the charge of water in the barrel is projected as a single body at the target. The valve 3 is spring loaded and closes automatically after the charge of water has been projected and the pressure within the barrel has fallen to atmospheric. Water from the tank 5 refills the barrel via valve 4. The firing cycle can then be repeated. The tank 5 can be refilled from any convenient source and the compressed air cylinder 8 can simply be replaced when empty. As the gun projects a body of water at high velocity, the volume of water required for each "shot" can be relatively small. Accordingly the capacity of the tank need not be very large. The whole apparatus can therefore be carried on a small vehicle. This is important in crowd control applications. Single shots of water can be directed from the vehicle at an individual in a crowd the means and velocity of the shot being such as to dishearten but not maim the target. It will be appreciated that different shot velocities, voiumes and cross sections may be provided to suit particular applications. The described embodiment comprises a pneumatically powered single barrel system refilled by free water from a reservoir. It will be appreciated that other propellants could be used, for example explosive or even mechanical arrangements, that the water can be supplied from a tank or in the form of for example sealed cartridges, and that more than one barrel could be provided. CLAIMS (Filed on 17/3/83)
1. A water gun comprising a barrel from which water is to be projected, means for charging the barrel with water, and means for ejecting the charge of water from the barrel as a single body.
2. Awater gun according to claim 1, wherein the water is ejected by compressed air.
3. Awater gun according to claim 1 or2, comprising a reservoir connected to the barrel by a pipe, and means for refilling the barrel from the reservoir after a charge of water has been ejected.
4. A water gun substantially as hereinbefore described with reference to the accompanying drawing.
GB08208126A 1982-03-19 1982-03-19 Water guns Expired GB2119068B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08208126A GB2119068B (en) 1982-03-19 1982-03-19 Water guns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08208126A GB2119068B (en) 1982-03-19 1982-03-19 Water guns

Publications (2)

Publication Number Publication Date
GB2119068A true GB2119068A (en) 1983-11-09
GB2119068B GB2119068B (en) 1985-12-11

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ID=10529137

Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998015321A1 (en) * 1996-10-10 1998-04-16 Huegin Lothar Impulse extinguisher
EP0990410A3 (en) * 1998-09-28 2003-05-02 Jacuzzi Europe Spa A cap for covering a water-outlet nozzle in hygiene/sanitary apparatus such as, for example but not exclusively, a shower cubicle, a bath tub, or the like
EP1901025A3 (en) * 2006-08-23 2010-02-10 Oto Melara S.p.A. Electric dissuader

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280566A (en) * 1926-11-10 1928-09-27 Charles Henri Augustine Fremaux
GB583029A (en) * 1943-01-26 1946-12-05 Reginald Percy Fraser Improvements relating to liquid projecting apparatus
GB601307A (en) * 1944-05-04 1948-05-04 Reginald Percy Fraser Improvements relating to liquid projection apparatus
GB844577A (en) * 1957-12-16 1960-08-17 Ernst Herberg Hand fire extinguishers
GB869261A (en) * 1957-03-16 1961-05-31 Mauser Werke Ag Improvements in or relating to flame-throwers
GB937023A (en) * 1962-04-19 1963-09-18 Aerojet General Co Fluid projection apparatus
US3748953A (en) * 1971-09-13 1973-07-31 Physics Int Co Water cannon
GB1526528A (en) * 1975-09-19 1978-09-27 Atlas Copco Ab Method and device for breaking a hard compact material
GB2030684A (en) * 1978-09-28 1980-04-10 Hanson R Bomb circuit disrupting device and method
GB2083894A (en) * 1980-09-18 1982-03-31 Ester Gerd Gun for neutralising explosives and the like

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280566A (en) * 1926-11-10 1928-09-27 Charles Henri Augustine Fremaux
GB583029A (en) * 1943-01-26 1946-12-05 Reginald Percy Fraser Improvements relating to liquid projecting apparatus
GB601307A (en) * 1944-05-04 1948-05-04 Reginald Percy Fraser Improvements relating to liquid projection apparatus
GB869261A (en) * 1957-03-16 1961-05-31 Mauser Werke Ag Improvements in or relating to flame-throwers
GB844577A (en) * 1957-12-16 1960-08-17 Ernst Herberg Hand fire extinguishers
GB937023A (en) * 1962-04-19 1963-09-18 Aerojet General Co Fluid projection apparatus
US3748953A (en) * 1971-09-13 1973-07-31 Physics Int Co Water cannon
GB1526528A (en) * 1975-09-19 1978-09-27 Atlas Copco Ab Method and device for breaking a hard compact material
GB2030684A (en) * 1978-09-28 1980-04-10 Hanson R Bomb circuit disrupting device and method
GB2083894A (en) * 1980-09-18 1982-03-31 Ester Gerd Gun for neutralising explosives and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998015321A1 (en) * 1996-10-10 1998-04-16 Huegin Lothar Impulse extinguisher
EP0990410A3 (en) * 1998-09-28 2003-05-02 Jacuzzi Europe Spa A cap for covering a water-outlet nozzle in hygiene/sanitary apparatus such as, for example but not exclusively, a shower cubicle, a bath tub, or the like
EP1901025A3 (en) * 2006-08-23 2010-02-10 Oto Melara S.p.A. Electric dissuader

Also Published As

Publication number Publication date
GB2119068B (en) 1985-12-11

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PCNP Patent ceased through non-payment of renewal fee