HIGH PRESSURE COMPRESSOR SYSTEM FOR COMPRESSED AIR OR GAS RIFLES OR PISTOLS

Abstract

High pressure compressor system for compressed air or gas rifles or pistols comprising a motor (1) that rotates a shaft (2) connected to at least one crankshaft (32) having at least two crankpins (7,8), a first crankpin (7) and a second crankpin (8), each of which is respectively attached to connecting rods (3, 4), which connecting rods (3, 4) are outphased with respect to one another: a first connecting rod (3) a second connecting rod (4), a second piston (12), and a second sleeve (13) surrounding the first piston (11), and at least partially surrounding the second piston (12) and both crankpins (7, 8), said second sleeve (13) being connected to the first sleeve (28) and including through holes (5, 6) for the fluid to pass into the second sleeve (13), and at least one guide tube (14, 19) that surrounds the second sleeve (13) and, at least partially, the second piston (12), and a second valve (16) that defines a fluid inlet into the second sleeve (13).

Description

High pressure compressor system for compressed air or gas rifles or pistols, of the type comprising a motor that rotates a shaft, characterized in that: said shaft is connected to at least one crankshaft having at least two crankpins, a first crankpin and a second crankpin, each crankpin being respectively attached to connecting rods, which are mutually outphased. A first connecting rod is connected to the first crankpin, which is attached to a first pin connected to a first piston that defines a first conduit inside and ending in a first sleeve that defines a first housing connected to a first valve; a second connecting rod connected to the second crankpin, which is connected to a second pin that in turn is connected to: a second piston and a second sleeve, said second sleeve surrounding the first piston, surrounding at least partially the second piston and the two crankpins, said second sleeve is connected to the first sleeve, and comprising some through holes for the fluid to pass into the second sleeve; and in that it comprises at least one guide tube that surrounds the second sleeve and, surrounds at least partially the second piston, and a second valve that defines a fluid inlet inside the second sleeve; in that when the shaft rotates actuated by the motor in a first phase: the shaft moves the second crankpin, which in turn drags the second connecting rod towards the shaft and said second connecting rod moves the second piston towards the shaft, opening the second valve, and thus allowing that the fluid passes into the second sleeve and the second piston drags the second sleeve in the same forward direction as the second connecting rod, and moves the first crankpin, which drags the first connecting rod towards the shaft, and said first connecting rod moves the first piston towards the shaft, the second sleeve and the first piston therebetween defining a second housing, and furthermore causing the fluid to pass from the second sleeve to the second housing through the first conduit, and dragging said second sleeve towards the first sleeve, compressing the first housing, which pushes the fluid towards the first valve, wherefrom the fluid under pressure exits; and when the shaft continues to rotate actuated by the motor in a second phase: it moves the second crankpin, which drags the second connecting rod in the opposite direction to the shaft and said second connecting rod moves the second piston in the opposite direction to the shaft, thus closing the second valve and preventing the gas from entering into the second sleeve and the second piston drags the second sleeve in the same forward direction as the second connecting rod, and moves the first crankpin, which drags the first connecting rod in the opposite direction to the shaft and said first connecting rod moves the first piston in the opposite direction to the shaft reducing the volume of the second housing and compressing the fluid therewithin, causing also the fluid to pass from the second housing to the first housing, and the fluid remains pre-charged in order to exit from the first valve when the shaft is rotated again actuated by the motor.

BACKGROUND OF THE INVENTION

Different systems are known in the state of the art that comprise compressors that drive the bullets in rifles or sports pistols, also known as “compressed air or gas” rifles or sports pistols.

Thus, state of the art is German Patent DE4212623 “DRUCKLUFTWAFFE”, of the year 1992, in the name of ANSCHUETZ GMBH JG, which refers to an air rifle having a battery powered electric motor with gearbox, compressor, and electronic circuitry held by in-line housing bellow the barrel. The air rifle has a continuously rotating or reciprocating compressor, driven by an electric motor, to provide the compressed air for propulsion of the bullet. Between the motor and the compressor there is a gearbox. The motor is a DC motor and is supplied from a battery. The motor, the compressor, the gearbox, the battery and the control electronics are all in line and mounted in a housing bellow the barrel. The battery is held in a quick-change adaptor. There is a pressure sensor which switches off the motor when the required propulsion pressure is reached. The motor is switched on by a trigger contact with a delay circuit. ADVANTAGE: Simple low-loss design.

Known is also French Patent FR2681674 “DISPOSITIF DE REARMEMENT ET ARME A AIR COMPRIME AINSII EQUIPE”, of the year 1991, in the name of D. Pierre DORVAL which refers to a pneumatic piston can be displaced to compress air in a pneumatic chamber until the action on the trigger allows to pass into an area of the barrel behind a projectile. An electric motor powered by a battery drives by means of a reducing gear a hydraulic pump lodged in an oil reservoir. The pump discharges into a hydraulic chamber by means of a distributor. The hydraulic chamber is separated from the pneumatic chamber by the piston. The distributor is movable between a filling position of the chamber, a position for maintaining oil in the chamber and a position for the return of oil into the reservoir. Application in air guns used for sports purposes.

BRIEF DESCRIPTION OF THE INVENTION

The present invention belongs to the field of air or gas shooting mechanisms.

The closest document is German Patent DE4212623.

It is known that a pressure cartridge can be connected to the air gun, particularly in the case of compressed air pistols, which provides compressed air to a predetermined number of shots, wherein the clamping lever is suppressed.

However, the balance of the gun depends on the filling level of the pressure cartridge. Therefore, said German invention solves this problem by motorizing the continuously operating pump, i.e., a rotating compressor or a pulsating compressor with its drive motor that is integrated into the gun for the first time. The result is low mechanical losses and a particularly simple structure.

On the other hand, it has the disadvantage that if a source of high pressure compressed air should become necessary (for example, between 60 and 120 bar), with a low flow per second and low weight, the compressors currently available on the market do not comply with such requirements and, moreover, a lot of weight is added to the air or gas rifle or pistol. In addition, there is also the added effect of a lot of vibrations occur at the moment of shooting, which affects the reliability of the shot.

The present invention solves the aforementioned problem by means of a compressor system that comprises a double compression stage, which allows it to reach the required pressures, by means of a mechanism that is both statically and dynamically balanced, which minimizes the vibrations at the moment of shooting, all of which being small sized and ideal for its installation in a pistol or rifle, which furthermore reduces the weight and is therefore suitable for being arranged in an air or gas gun.

An object of the present invention is a high pressure compressor system for compressed air or gas rifles or pistols, of the type comprising a motor that rotates a shaft, characterized in that: said shaft is connected to at least one crankshaft having at least two crankpins, a first crankpin and a second crankpin, each crankpin being respectively attached to connected rods, which are mutually outphased. A first connecting rod is connected to the first crankpin, which is attached to a first pin connected to a first piston that defines a first conduit inside and which ends in a first sleeve that defines a first housing connected to a first valve; a second connecting rod connected to the second crankpin, which is connected to a second pin that in turn is connected to: a second piston and a second sleeve, said second sleeve surrounding the first piston, surrounding at least partially the second piston and the two crankpins, said second sleeve is connected to the first sleeve, and comprising some through holes for the fluid to pass through and into the second sleeve; and in that it comprises at least one guide tube that surrounds the second sleeve and, surrounds at least partially the second piston, and a second valve that defines a fluid inlet inside the second sleeve; in that when the shaft rotates actuated by the motor in a first phase: the shaft moves the second crankpin, which in turn drags the second connecting rod towards the shaft and said second connecting rod moves the second piston towards the shaft, opening the second valve, and thus allowing that the fluid passes into the second sleeve and the second piston drags the second sleeve in the same forward direction as the second connecting rod, and moves the first crankpin, which drags the first connecting rod towards the shaft, and said first connecting rod moves the first piston towards the shaft, the second sleeve and the first piston therebetween defining a second housing, and furthermore causing the fluid to pass from the second sleeve to the second housing through the first conduit, and dragging said second sleeve towards the first sleeve, compressing the first housing, which pushes the fluid towards the first valve, wherefrom the fluid under pressure exits; and, when the shaft continues to rotate actuated by the motor in a second phase: it moves the second crankpin, which drags the second connecting rod in the opposite direction to the shaft and said second connecting rod moves the second piston in the opposite direction to the shaft, thus closing the second valve and preventing the gas from entering into the second sleeve and the second piston drags the second sleeve in the same forward direction as the second connecting rod, and moves the first crankpin, which drags the first connecting rod in the opposite direction to the shaft and said first connecting rod moves the first piston in the opposite direction to the shaft reducing the volume of the second housing and compressing the fluid therewithin, causing also the fluid to pass from the second housing to the first housing, and the fluid remains pre-charged in order to exit from the first valve when the shaft is rotated again actuated by the motor.

BRIEF DESCRIPTION OF THE DRAWINGS

To facilitate the explanation hereof, this Specification includes six sheets of drawings that represent a practical embodiment, which is cited by way of an example and is not intended to limit the scope of the present invention:

FIG. 1 is a general view of the object of the invention, showing the first valve opposite to the first piston,

FIG. 2 is a view of a longitudinal section along line II-II of FIG. 1,

FIG. 3 is a view of a cross section along lines III-III of FIG. 1,

FIG. 4 is a view of a cross section along line II-II of FIG. 1, assuming that the valve is located above the shaft,

FIG. 5 is a view of a cross section along line II-III of FIG. 1, in the first motion, assuming that the valve is located above the shaft, and

FIG. 6 is a view of a cross section along line II-III of FIG. 1, in the second motion, assuming that the valve is located above the shaft.

SPECIFIC EMBODIMENT OF THE PRESENT INVENTION

FIG. 1 shows a motor 1, a bench 21, a butt 23 and a guide tube 14.

FIG. 2 illustrates motor 1 having a shaft 2, a crankshaft 32, a first connecting rod 3, a second connecting rod 4, a first crankpin 7, a second crankpin 8, a first pin 9, a second pin 10, a first piston 11, a second piston 12, a first sleeve 28, a second sleeve 13, an intermediate support 31, through holes 5,6, guide tubes 14, 19, a first valve 15, a second valve 16, a first conduit 17, a second conduit 18, the bench 21, receptacle 22, butt 23, a first leaf valve 25, a second leaf valve 26, a first housing 27, a passage 29 and a fixed piston 30.

FIG. 3 shows the first connecting rod 3, the second connecting rod 4, the first crankpin 7, the second crankpin 8, the first pin 9, the second pin 10, the first piston 11, the second piston 12, the second sleeve 13, the intermediate support 31, the guiding tubes 14, 19, the first valve 15, the second valve 16, the first conduit 17, the bench 21, the receptacle 22, the butt 23, the first sleeve 28, the first leaf valve 25, the second leaf valve 26, the first housing 27, the passage 29 and the fixed piston 30.

FIG. 4 includes drawings of motor 1 having shaft 2, crankshaft 32, the first connecting rod 3, the second connecting rod 4, the first crankpin 7, the second crankpin 8, the first pin 9, the second pin 10, the first piston 11, the second piston 12, the second sleeve 13, the intermediate support 31, the through holes 5,6, the guide tubes 14,19, the first valve 15, the second valve 16, the first conduit 17, the second conduit 18, a second housing 20, the bench 21, a canister 24, the receptacle 22, the first sleeve 28, the first housing 27, the passage 29 and the fixed piston 30.

FIG. 5 represents the shaft 2, the first connecting rod 3, the second connecting rod 4, the first crankpin 7, the second crankpin 8, the first pin 9, the second pin 10, the first piston 11, the second piston 12, the second sleeve 13, the intermediate support 31, the guide tubes 14, 19, the first valve 15, the first conduit 17, the second housing 20, the bench 21 and the receptacle 21; the first sleeve 28, the first housing 27, the passage 29 and the fixed piston 30.

Last, FIG. 6 illustrates the shaft 2, the first connecting rod 3, the second connecting rod 4, the first crankpin 7, the second crankpin 8, the first pin 9, the second pin 10, the first piston 11, the second piston 12, the second sleeve 13, the intermediate support 31, the guide tubes 14, 19, the first valve 15, the first conduit 17, the second housing 20, the bench 21 and the receptacle 22, the first sleeve 28, the passage 29 and the fixed piston 30.

The high pressure compressor system of the present invention consists of a motor 1 that causes a shaft 2 to rotate, and the shaft 2 causes crankshaft 32 to rotate, the crankshaft 32 comprising the crankpins 7,8 and the connecting rods 3, 4.

Said shaft 2 is connected to the crankpins 7, 8, each of which is attached to a respective connecting rod 3, 4, said connecting rods (first connecting rod 3 and second connecting rod 4) being outphased with respect to one another, that is, there is a delay until the second connecting rod 4 gets in the same position as the first connecting rod 3.

The first connecting rod 3 is attached to a first pin 9 and said first pin 9 is connected to a first piston 11 that defines a conduit 17 inside for the passage of fluid, and which ends in a first sleeve 28 that configures a first housing 27 which, in turn, is connected to the first valve 15.

The second connecting rod 4 is attached to a second pin 10 and said second pin 10 is connected in turn to two elements: to a second piston 12, and to a second sleeve 13, that surrounds said second sleeve 13 around the first piston 11, at least partly around the second piston 12 and around the crankpin 7; and is also connected to the first sleeve 28, comprising also the through holes 5, 6 for the passage of the fluid inside the second sleeve 13.

Further, it also comprises at least one guide tube 14, 19 that surrounds the second sleeve 13 and surrounds, at least partially, the second piston 12.

It also comprises a second valve 16 that defines the inlet of the fluid into the second sleeve 13.

Thus, when the shaft 2 rotates driven by the motor 1 in a first stage, two actions occur at the crankshaft 32.

On the one hand, the shaft 2 pushes the second crankpin 7, which drags the second connecting rod 4 towards the shaft 2, and said second connecting rod 4 pushes the second piston 12 towards the shaft 2, opening the second valve 16 and allowing the inlet of the fluid into the guide tube 19 and the second piston 12 drags the second sleeve 13 in the same forward direction as the second connecting rod 4.

On the other hand, the shaft 2 pushes the first crankpin 7, which drags the first connecting rod 3 towards the shaft 2 and said first connecting rod 3 pushes the first piston 11 towards the shaft 2 and defines a second housing 20 for the fluid between second sleeve 13 and the first piston 11, also causing the fluid to pass through the second sleeve 13 through the first conduit 17 until it reaches the second housing 20.

In addition, said second sleeve 13 drags the first sleeve 28, compressing the first housing 27, which pushes the fluid towards the first valve 15 wherefrom the fluid exits by pressure.

And two actions occur when the shaft 2 continues to rotate driven by the motor 1 in a second stage:

On the one hand, the shaft 2 moves the second crankpin 8, which drags the second connecting rod 4 in the opposite direction to the shaft 2 and said second connecting rod 4 pushes the second piston 12 in the opposite direction to the shaft 2, thus closing the second valve 16 and preventing the inlet of gas into the second sleeve 13 and the second piston 12 drags the second sleeve 13 in the same forward direction as the second connecting rod 4.

On the other hand, the shaft 2 pushes the first crankpin 7, which in turn drags the first connecting rod 3 in the opposite direction to the shaft 2 and said first connecting rod 3 pushes the first piston 11 in the opposite direction to the shaft 2 thus reducing the capacity of the second housing 20 and compressing the fluid found therewithin, causing the fluid from the second housing 20 towards the first housing 27. Thus, the fluid is pre-charged to leave the valve 15 when the shaft 2 is rotated again, actuated by the motor 1.

The first crankpin 7 is attached to the first connecting rod 3 and the second crankpin 8 to the second connecting rod 4. Besides, the second sleeve 13, surrounds the crankpins 7,8 at least partially. When said shaft 2 rotates driven by the motor 1 at a first stage: on the one hand, it moves the second crankpin 8 that drags the second connecting rod 4 towards the shaft 2 and, on the other hand, it moves the first crankpin 7, which drags the first connecting rod 3 towards the shaft 2.

In this manner, when the shaft 2 continues to rotate driven by the motor 1 in a second stage, it moves the second crankpin 8, which drags the second connecting rod 4 in the opposite direction to the shaft 2, and it moves the first crankpin 7, which drags the first connecting rod 3 in the opposite direction to the shaft 2.

As it was mentioned above, the connecting rods 3,4 are mutually outphased. The inventors have observed that the effects are very relevant if the outphasing is in the range 170-190°, more specifically, the inventors found optimum results when the connecting rods 3, 4 are mutually outphased by approximately 180°.

In addition, have been provided the possibility of configuring a receptacle 22 arranged inside the second sleeve 13, which partially surrounds the crankpins 7, 8; which receptacle 22 stores the fluid incoming from the second valve 16, and in this manner, the supply of the fluid will be faster and continuous.

Optionally, the system can comprise a bench 21 that at least partially surrounds the guide tubes 14, 19, the motor 1, the shaft 2, and the second sleeve 13.

It is also possible that the second piston 12 defines a second conduit 18 therewithin and that ends up in the second valve 16 (FIG. 2), thus connecting the fluid from the second valve 16 with the inner part of the second sleeve 13.

Optionally too and for simplicity, the second valve 16 can be provided as a ball valve as shown in FIGS. 2 and 3, even if this does not exclude the use of other valves, if adequate according to the pistol or rifle.

Constructively, the second valve 16 can be arranged as indicated in FIGS. 1 to 3, i.e., after the second connecting rod 4, or above the second sleeve 13, as in FIGS. 4 to 6.

In another optional configuration, the first sleeve 28 and the second sleeve 13 form a single piece, or the first sleeve 28 is attached to the second sleeve 13 by means of an intermediate support 31 which comprises the passage 29, as shown in FIGS. 2 to 6.

In this last option, the attachment of the first sleeve 28 to the second sleeve 13 by means of an intermediate support 31 would require that the first housing 27 be connected to the second housing 20 through a passage 29 wherein the fluid passes from one housing to the other housing and the first leaf valve 25.

The invention may also comprise a second leaf valve 26 at the exit from the first conduit 17, attached to the first piston 11, opposite the passage 29, so that said second leaf valve moves together with the first piston 11.

Said leaf valves 25, 26 allow the fluid flows in one direction, from the second housing 20 to the first housing 27, but prevents the opposite, that is, that said leaf valves 25,26 do not allow the transfer of the fluid from the first housing 27 to the second housing 20 or inside the first conduit 17.

Likewise, and optionally, the first valve 15 can constructively be integrated to a fixed piston 30.

Likewise, there is a possibility that the fixed piston 30 be connected to the guide tube 14 since said guide tube 14 is fixed (immobile) with respect to the shaft 2.

This embodiment will be used an example option of the two crankpins 7, 8. However, as explained above, more than two crankpins could be used.

As follows two possible embodiments will be described, a first embodiment having the fluid inlet through the second valve 16, as indicated in FIGS. 1 to 3, wherein the second valve 16 is in a same plane as the crankpins 7, 8, and a second embodiment wherein the fluid is let in through the second valve 16 located above the crankpins 7, 8 (FIGS. 4 to 6).

The operation is essentially the same, the difference lies in the interaction of the second piston 16, since in the case of FIGS. 1 to 3 it is necessary to have a second conduit 18 formed in the second piston 16 to allow the flow of the fluid into the second sleeve 13. Conversely, in the case of FIGS. 4 to 6 said second piston 16 does not need to have any second conduit 18, since the fluid does not enter to the second sleeve 13 through such area; it enters through the upper part of the second sleeve 13.

The fluid, for example, atmospheric air or CO2, enters through the second valve 16 into the canister 24, which is formed by the tube 19 and the piston 12.

When the second piston 12 moves forward away from the shaft 2, dragging the second sleeve 13, towards the butt 23, the first piston 11 moves forward and moves away from the shaft 2, in the opposite direction to the second piston 12 and towards the first valve 15, thus compressing the fluid that exits from the second conduit 18 and is discharged in the receptacle 22.

This creates a pressure that is higher than the atmospheric pressure inside the body of the compressor, which improves the filling of the second housing 20 when the second piston 11 moves away from the shaft 2.

When the first piston 11 moves away from the shaft 2 and from the second sleeve 13, in the opposite direction, as actuated by the second piston 12, to which said second sleeve 13 is connected, the compressed fluid in the second housing 20 is compressed again and discharged in the first housing 27.

When movement of the first piston 11 and of the second piston 12 with the second sleeve 13 is reversed again by the action of the crankpins 7,8, the fluid stored in the first housing 27 is compressed again and exits through the first valve 15 to later serve for the shot of the pellet.

The present invention describes a novel high pressure compressor system for air-compressed or gas rifles or pistols. The examples provided herein are not limiting of the present invention, which may have different applications and/or adaptations, all of which are within the scope of the following claims.

Claims

1. High pressure compressor system for compressed air or gas rifles or pistols, of the type comprising a motor (1) that rotates a shaft (2); characterized in that: said shaft (2) is connected to at least one crankshaft (32) having at least two crankpins (7,8), a first crankpin (7) and a second crankpin (8), each of which is respectively attached to connecting rods (3, 4), which connecting rods (3, 4) are mutually outphased: a first connecting rod (3) connected to the first crankpin (7), which is attached to a first pin (9) connected to a first piston (11) which defines a first conduit (17) inside, and which ends at a first sleeve (28) that defines a first housing (27) that is connected to a first valve (15),a second connecting rod (4) connected to the second crankpin (8), which is attached to a second pin (10), in turn connected to: a second piston (12), anda second sleeve (13), said second sleeve (13) surrounding the first piston (11), and at least partially surrounding the second piston (12) and both crankpins (7, 8), said second sleeve (13) being connected to the first sleeve (28) and comprising through holes (5, 6) for the fluid to pass into the second sleeve (13),and in that it comprises at least one guide tube (14, 19) that surrounds the second sleeve (13) and, at least partially, the second piston (12), and a second valve (16) that defines a fluid inlet into the second sleeve (13);

2. The system according to claim 1, characterized in that the connecting rods (3, 4) are outphased with respect to one another in a range of 170-190°.

3. The system according to claim 2, characterized in that the connecting rods (3,4) are outphased with respect to one another by 180°.

4. The system according to claim 1, characterized in that inside the second sleeve (13) and partially surrounding the crankshafts, a receptacle (22) is configured which stores the fluid coming from the second valve (16).

5. The system according to claim 1, characterized in that it comprises a bench (21) at least partially surrounding: the guide tube (14, 19),the motor (1),the shaft (2), andthe second sleeve (13).

6. The system according to claim 5, characterized in that the second piston (12) defines a second conduit (18) therewithin, and which ends at the second valve (16).

7. The system according to claim 6, characterized in that the second valve (16) is a ball valve.

8. The system according to claim 7, characterized in that the second valve (16) is positioned above the second sleeve (13).

9. The system according to claim 1, characterized in that the first sleeve (28) and the second sleeve (13) form a single piece.

10. The system according to claim 1, characterized in that the first housing (27) is connected to the second housing (20) through a passage (29) whereby the fluid passes from one housing to the other housing.

11. The system according to claim 10, characterized in that the first sleeve (28) is attached to the second sleeve (13) by an intermediate support (31) that comprises the passage (29) and the first leaf valve (25).

12. The system according to claim 11, characterized in that it comprises a second leaf valve (26) at the exit of the first conduit (17), attached to the first piston (11) and opposite the passage (29), said second leaf valve (26) moving together with said piston (11).

13. The system according to claim 1, characterized in that the first valve (15) is a part of a fixed piston (30).

14. The system according to claim 13, characterized in that the fixed piston (30) is connected to the guide tube (14).