EP2202477A1 - Dispositif de chargement étanche à l'eau pour lance-harpons - Google Patents

Dispositif de chargement étanche à l'eau pour lance-harpons Download PDF

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Publication number
EP2202477A1
EP2202477A1 EP09180065A EP09180065A EP2202477A1 EP 2202477 A1 EP2202477 A1 EP 2202477A1 EP 09180065 A EP09180065 A EP 09180065A EP 09180065 A EP09180065 A EP 09180065A EP 2202477 A1 EP2202477 A1 EP 2202477A1
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EP
European Patent Office
Prior art keywords
spear
watertight
head
barrel
tip
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
EP09180065A
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German (de)
English (en)
Other versions
EP2202477B1 (fr
Inventor
Marco Paganelli
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Individual
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Individual
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Publication of EP2202477A1 publication Critical patent/EP2202477A1/fr
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Classifications

    • 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
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/80—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes
    • F41B11/83—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes for launching harpoons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A21/00—Barrels; Gun tubes; Muzzle attachments; Barrel mounting means
    • F41A21/32—Muzzle attachments or glands

Definitions

  • the present invention relates to a watertight loading device for spearguns, particularly of an oleo-pneumatic type.
  • Traditional oleo-pneumatic spearguns substantially consist of three parts: a tank containing compressed air; a barrel with a muzzle, containing a piston arranged for firing a spear on a rectilinear trajectory, and a grip incorporating the firing mechanism, controlled by a trigger and a compressed air charge/discharge valve.
  • the mechanisms in this class of spearguns work in an oil bath.
  • Operation usually involves the following steps: the tank is precharged with a quantity of air (pre-charge) which is furtherly compressed when the speargun is loaded, while the oil acts as a lubricant for the piston and the various internal levers.
  • pre-charge a quantity of air
  • the piston is released and pushes forward the spear, which comes out the barrel at high speed, depending on the pressure with which the speargun is charged.
  • the piston is stopped by the muzzle of the barrel, while the spear, attached to a thin line, comes out the muzzle and strikes the prey.
  • spearguns introduce a large quantity of water into the barrel along with the spear: this means that, to expel the spear and the water, the spear-gun requires the piston, which receives the expulsion command from the trigger, to overcome high pressures, requiring considerable effort and waste of energy.
  • the spear-gun when in use, the spear-gun is made heavier by the water present in the barrel and, with the difficult expulsion of the spear, is disadvantageously noisier, much slower and less accurate when it comes to striking the prey.
  • Said element comprises watertight spear coupling means arranged, when the spear is inserted, for isolating the inside of the speargun barrel from the external environment, thereby constituting a barrier against water flowing into the barrel, both during loading and when the speargun is loaded.
  • Said coupling means consist of a special tip, to be positioned on the muzzle, at the end of the spear-gun barrel, and arranged for forming a watertight coupling with a first cylinder, or shutter, sliding on the spear and made of metallic or plastic material.
  • This particular watertight coupling between the tip and the metallic shutter can be achieved by shape coupling, for example by means of a conical portion, or by the interposition of a seal of known type.
  • the watertight shutter is coupled with a second watertight means constituted of a toroidal seal sliding on the spear and arranged for being forced into a recess in the mouth of said watertight cylinder.
  • the watertight cylinder and the toroidal seal that make up the coupling element arranged for isolating the barrel from the external environment remain on the spear and travel with it, thereby disadvantageously conditioning its hydrodynamicity: the spear is subject to slowing due to friction, with a consequent reduction in its expulsion velocity and less firing accuracy.
  • Said coupling means since they slide along the spear, when the spear is expelled, impact violently against the retaining end and can generate noise that can disturb and interrupt the silence and state of calm that are essential for the success of a fishing expedition.
  • said coupling means by remaining on the spear, are subject to various types of impacts with preys, or with rocks, and so can be easily damaged and can wear quickly.
  • a further disadvantage consists in the need to use special, longer spears with this type of spearguns, to be able to hold the extra components.
  • Longer spears require greater loading pressures to overcome the additional weight: consequently, the whole speargun becomes more difficult to load, heavier and more difficult to handle, with complications for fishing.
  • the aim of this invention in addition to completely eliminating the possible formation of a column of water inside the barrel when loading and fishing, regardless the methods of loading, is also to overcome the limits and disadvantages of Italian Patent No. 0001331990 .
  • the aims of the invention are substantially the following:
  • a watertight loading device for spearguns with a piston comprising a tip arranged for being mounted on a barrel of a speargun and suitable for a spear to pass through, characterized in that elastic sealing means, arranged for cooperating by friction with said spear to obtain a watertight seal, are associated with said tip.
  • the tip comprises a head and a terminal element arranged for being coupled by means of the interposition of said elastic means.
  • said elastic means comprise at least one seal.
  • the coupling between the head and the terminal element is achieved preferably by means of reciprocal rotation, causing the compression of the elastic means between said surfaces.
  • the tip also comprises a muzzle arranged for being interposed between the head and the speargun barrel.
  • Said muzzle features a housing suitable to contain damping means used to muffle the impact of the piston against the head.
  • said damping means comprise a cylindrical bushing, made of elastic yielding material, coaxial to a plunger with a T-section, axially perforated and suitable for the spear to pass through.
  • the plunger is preferably made of a more rigid material to withstand the impact of the piston.
  • a bottom element shaped without corners is associated with the spear.
  • the device in question totally eliminates the column of water inside the barrel of oleo-pneumatic spearguns, by using furtherly advantageous construction techniques and assembly methods.
  • the device does not require the use of special elements on the spear and does not exceed the dimensions of a traditional muzzle: this does not force the user to use spears of a length longer than that normally used, thereby guaranteeing a higher expulsion speed and a greater effect on the target.
  • the device therefore guarantees excellent firing precision, as it does not make use of additional elements that can often have poor hydrodynamics.
  • the speargun is lighter, easier to handle, and therefore also suitable for fishing by women, protects the joints of the arm and wrist, and reduces the need for a particular physical strength in order to use it.
  • the invention requires low pre-charge pressures, thereby considerably reducing the amount of wear on rubber parts and sealing means, and ensuring a longer life for the entire system.
  • the device guarantees that this can be done extremely simply: for example, the sealing means can be quickly replaced by the user by simply unscrewing the terminal element from the muzzle to reach the recess where the seals are positioned.
  • the device also comprises damping means, specifically a damping bushing with the specific task of absorbing the energy produced by the piston during expulsion.
  • damping bushing is made of a sound-absorbent material, resistant to impact and wear, especially by external agents, such as water and hydrocarbons, with which it may come into contact.
  • the sealing means are also safeguarded by the presence on the end of the spear of a special bottom element, specially shaped to exploit the elasticity of the seals and prevent them from tearing or breaking.
  • loading can be split into several intervals, with pauses in between, resulting in less fatigue for the user, but still preventing water from entering the barrel of the gun.
  • Figure 1 indicates an oleo-pneumatic speargun, according to known art, consisting of a grip, a tank and a barrel 200 with which a tip 100 is associated.
  • the barrel 200 and the tip 100 can both be passed through by a spear 300, tied to the speargun by means of a line.
  • FIGS 2 and 3 illustrate the composition of the tip 1, constituting the loading device object of the invention, and the methods for assembling its parts.
  • the tip 1 which can be associated with the barrel 2 of the gun, has a hole 20 through which a spear 3 can pass, and comprises three main elements: a muzzle 5, a head 6 and a terminal element 7.
  • the muzzle 5 is substantially cylindrical in shape, the internal diameter of its axial cavity is almost constant and it has two internally threaded ends, one of which is arranged for being associated with a gun barrel 2, and the other to the head 6 of the tip 1.
  • the head 6, which is also substantially cylindrical in shape, has portions with different internal diameters: the two ends threaded respectively internally and externally have a larger diameter and form an intermediate seat 9, with a smaller diameter, into which it is possible to insert elastic sealing means 8 arranged for cooperating by friction with the spear 3 to guarantee the watertightness of the gun barrel 2.
  • Said elastic sealing means 8 may comprise toroidal seals, or scrapers or lip seals, based on specific needs.
  • the figure for example, shows two O-Ring type seals 8' and 8" with a rigid spacer element 8"' placed between them.
  • the terminal element 7 has a cylindrical portion threaded externally, one base of which constitutes a thrust surface 11, and a tapered end portion fitted with a seat 12 for housing a centring ring 13 slidingly associated with the spear 3; the internal cavity of the terminal element 7 has a constant diameter, needed for the passage of the spear 3.
  • the thrust surface 11 compresses the watertight elastic sealing means 8 against a stop surface 10 on the head 6, until they are squeezed into a special seat 9, thereby guaranteeing the maximum impermeability against the surrounding water, in conjunction with the spear 3.
  • the terminal element 7, between the cylindrical part and the tapered portion is provided with a further seal 14 arranged for being forced into a special recess15 around the head 6.
  • the muzzle 5 is also fitted on the inside with damping means 16, suitable to absorb the energy generated by the impact of the piston 4 when the spear 3 is expelled, thereby reducing and damping the noise due to the impact between the two bodies 4 and 6.
  • the damping means 16 comprise two coaxial elements with different stiffness: a more rigid plunger 16' made of sound-absorbent material, against which the piston 4 impacts, and an elastically yielding cylindrical bushing 16", coaxial with said plunger.
  • the rigid plunger 16' under the thrust of the piston 4 engages the cavity 17 at the end next to the head 6; the T-section of said plunger 16' enables it to withstand the blow of the piston 4 and at the same time to reduce the impact thanks to the compression on the elastically yielding coaxial cylinder 16".
  • FIG 4 shows a spear 3 that can be used with an oleo-pneumatic speargun fitted with the device object of the invention.
  • This spear 3, of traditional length, has a special bottom element 18 on the bottom end, specially shaped without corners, with a substantially ogival shape, arranged for protecting the elastic sealing means 8 against tears.
  • the spear is also provided with a retainer ring 19 whose movement, when the spear is expelled, is limited by the bottom element 18, which also constitutes a stop element for the centring ring 13 according to the known art.
  • the speargun can be armed by following a series of simple steps: once the tip 1 is mounted on the barrel 2 as described above, the gun is loaded by inserting the bottom end 18 of the spear 3 into the hole 12 on the terminal element 7 and sliding it into the barrel 2 until the bottom element 18 rests on the piston 4. Furthermore, the piston 4 is pushed towards the grip of the speargun, completely compressing the air in the tank, thereby creating the pressure that the spear 3 will be subjected to when it is expelled.
  • Said procedure is therefore similar to that used for traditional underwater weapons, except for the possibility of splitting the force needed by having intervals between the spear loading steps, by means of a power regulator of a known type positioned on the grip.
  • the only water present in the barrel at the moment of expulsion is the column of water under the piston before insertion of the bottom element of the spear into the hole on the terminal element.
  • the quantity of water is minimal and has no impact on the performance or advantages described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Seal Device For Vehicle (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Emergency Lowering Means (AREA)
EP09180065A 2008-12-23 2009-12-21 Dispositif de chargement étanche à l'eau pour lance-harpons Active EP2202477B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITLU2008A000022A IT1393639B1 (it) 2008-12-23 2008-12-23 Dispositivo di caricamento a tenuta di liquido per fucili subacquei

Publications (2)

Publication Number Publication Date
EP2202477A1 true EP2202477A1 (fr) 2010-06-30
EP2202477B1 EP2202477B1 (fr) 2011-12-14

Family

ID=40951440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09180065A Active EP2202477B1 (fr) 2008-12-23 2009-12-21 Dispositif de chargement étanche à l'eau pour lance-harpons

Country Status (4)

Country Link
EP (1) EP2202477B1 (fr)
AT (1) ATE537420T1 (fr)
ES (1) ES2378749T3 (fr)
IT (1) IT1393639B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITCB20100002A1 (it) * 2010-05-20 2011-11-21 Colameo Luigina Lucia Sistema sottovuoto per fucile subacqueo
IT201700113570A1 (it) * 2017-10-10 2019-04-10 Piero Bracali Sistema scorrisagola per asta di fucile subacqueo dotato di protezione per monofilo di collegamento tra asta e fucile
IT202400002656A1 (it) 2024-02-08 2025-08-08 Massysub Di Daniele Massimiliano & C S A S Un assieme di tenuta per fucile subacqueo oleopneumatico

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122873B (de) * 1958-06-18 1962-01-25 Vilarrubis Y Sague S A Pneumatisches Harpunengewehr
US3320941A (en) * 1965-09-27 1967-05-23 Houghton John George Compressed gas operated harpoon gun
FR2617954A1 (fr) * 1987-07-07 1989-01-13 Ctiemge Harpon hydropneumatique
WO1996039607A1 (fr) * 1995-06-06 1996-12-12 Kozlovtzev Jury B Fusil lance-harpon pneumatique pour la chasse sous-marine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1122873B (de) * 1958-06-18 1962-01-25 Vilarrubis Y Sague S A Pneumatisches Harpunengewehr
US3320941A (en) * 1965-09-27 1967-05-23 Houghton John George Compressed gas operated harpoon gun
FR2617954A1 (fr) * 1987-07-07 1989-01-13 Ctiemge Harpon hydropneumatique
WO1996039607A1 (fr) * 1995-06-06 1996-12-12 Kozlovtzev Jury B Fusil lance-harpon pneumatique pour la chasse sous-marine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITCB20100002A1 (it) * 2010-05-20 2011-11-21 Colameo Luigina Lucia Sistema sottovuoto per fucile subacqueo
IT201700113570A1 (it) * 2017-10-10 2019-04-10 Piero Bracali Sistema scorrisagola per asta di fucile subacqueo dotato di protezione per monofilo di collegamento tra asta e fucile
IT202400002656A1 (it) 2024-02-08 2025-08-08 Massysub Di Daniele Massimiliano & C S A S Un assieme di tenuta per fucile subacqueo oleopneumatico

Also Published As

Publication number Publication date
EP2202477B1 (fr) 2011-12-14
ITLU20080022A1 (it) 2010-06-24
ES2378749T3 (es) 2012-04-17
IT1393639B1 (it) 2012-05-08
ATE537420T1 (de) 2011-12-15

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