CA2901657A1 - An accurate lead free frangible airgun pellet and method of making same - Google Patents
An accurate lead free frangible airgun pellet and method of making same Download PDFInfo
- Publication number
- CA2901657A1 CA2901657A1 CA2901657A CA2901657A CA2901657A1 CA 2901657 A1 CA2901657 A1 CA 2901657A1 CA 2901657 A CA2901657 A CA 2901657A CA 2901657 A CA2901657 A CA 2901657A CA 2901657 A1 CA2901657 A1 CA 2901657A1
- Authority
- CA
- Canada
- Prior art keywords
- airgun
- pellet
- airgun pellet
- diameter shank
- shank
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B7/00—Shotgun ammunition
- F42B7/02—Cartridges, i.e. cases with propellant charge and missile
- F42B7/04—Cartridges, i.e. cases with propellant charge and missile of pellet type
- F42B7/046—Pellets or shot therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
- F42B12/34—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect expanding before or on impact, i.e. of dumdum or mushroom type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
- F42B12/72—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material
- F42B12/74—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the material of the core or solid body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
Abstract
An accurate, lead free, frangible airgun pellet constituted from metal particles which may be mixed with a non-toxic flow agent and method of making an airgun pellet are disclosed, wherein airgun pellets placed therein will, when shot at a minimum distance of ten meters, will breakup into small pieces when striking a hard surface such as a rock, a metal plate and a concrete wall. The muzzle velocity will be less than five hundred feet per second needed to initiate the breaking up of the airgun pellet striking a hard surface at a minimum distance of ten meters. The airgun pellet may have one or more different diameters. The airgun pellet will have the accuracy capability of placing five shots within a Canadian quarter shot at a distance of ten meters using an inexpensive spring type air rifle.
Description
An accurate lead free frangible airgun pellet and method of making same ABSTRACT
An accurate, lead free, frangible airgun pellet constituted from metal particles which may be mixed with a non-toxic flow agent and method of making an airgun pellet are disclosed, wherein airgun pellets placed therein will, when shot at a minimum distance of ten meters, will breakup into small pieces when striking a hard surface such as a rock, a metal plate and a concrete wall. The muzzle velocity will be less than five hundred feet per second needed to initiate the breaking up of the airgun pellet striking a hard surface at a minimum distance of ten meters. The airgun pellet may have one or more different diameters. The airgun pellet will have the accuracy capability of placing five shots within a Canadian quarter shot at a distance of ten meters using an inexpensive spring type air rifle.
DESCRIPTION
1. Field of the invention This invention relates to an accurate airgun pellet that is lead free and frangible.
An accurate, lead free, frangible airgun pellet constituted from metal particles which may be mixed with a non-toxic flow agent and method of making an airgun pellet are disclosed, wherein airgun pellets placed therein will, when shot at a minimum distance of ten meters, will breakup into small pieces when striking a hard surface such as a rock, a metal plate and a concrete wall. The muzzle velocity will be less than five hundred feet per second needed to initiate the breaking up of the airgun pellet striking a hard surface at a minimum distance of ten meters. The airgun pellet may have one or more different diameters. The airgun pellet will have the accuracy capability of placing five shots within a Canadian quarter shot at a distance of ten meters using an inexpensive spring type air rifle.
DESCRIPTION
1. Field of the invention This invention relates to an accurate airgun pellet that is lead free and frangible.
2. Description of the Previously Published Art It is desirable to manufacture accurate, lead free, frangible airgun pellets having muzzle velocities of less than five hundred feet per second that breaks apart into small pieces when striking a hard surface such as a rock, a steel plate and a concrete wall at a distance of at least ten meters. The airgun pellet must have enough integrity in its composition that it does not break apart while passing through the barrel of an airgun.
Currently, lead free airgun pellets are constructed out of hard alloys resulting in these types of pellets to ricochet back towards the shooter when striking a hard surface such as a rock, a steel plate and a concrete wall at a distance of at least ten meters. It is also known that airgun pellets constructed out of lead also have the tendency to ricochet when striking a hard surface.
It is desirable that the lead free, frangible airgun pellet have an accuracy capability of grouping five shots within the area of a Canadian quarter utilizing an inexpensive spring type air rifle at a distance of ten meters.
OBJECT OF THE INVENTION
It is the object of this invention to provide an accurate, lead free, accurate airgun pellet that breaks apart into small pieces when striking a hard surface such as a rock, a steel plate and a concrete wall at a distance of ten meters or more having an initial muzzle velocity of less than five hundred feet per second constructed from metal particles and swaged to a desired hardness using a suitable die known in the arts.
The shank of the said airgun pellet may have one or more different diameters. There may be an angled step of one degree to ninety degrees between each of the diameters.
SUMMARY OF THE INVENTION
The foregoing and further objects and advantages are obtained by manufacturing an accurate, lead free, frangible airgun pellet suitable for air rifles and air pistols from metal particles, swaging or compressing a measured amount of metal particles to a desired hardness using a suitable die known in the arts. The shank of the airgun pellet may have one or more diameters. There may be an angled step one to ninety degrees between each of the diameters.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The current invention achieves the desired results by constructing an accurate, lead free frangible pellet out of metal particles. The metal particles may be from one type of metal or a combination of particles of various metal types. Metal particles such as copper, bronze, brass, tin, zinc, iron, steel, tungsten, tungsten carbide, ferrotungsten, aluminum and bismuth are examples of suitable metal particles. The metal particles may be a powder, granules, flakes, chips, other compactable particulate forms or a combination thereof.
The metal particles may be mixed with a suitable non-toxic flow agent and mixed until a homogenous mixture is obtained. The amount of flow agent added to the metal particles will depend on the preferred rate of flow the mixture requires for maximum production rate efficiency and also the desired frangibility of the airgun pellet. An addition of .2% of flow agent is a good start point.
A pre-measured amount of the homogenous mixture is placed inside a suitable die having the desired dimensions. The homogenous mixture is then swaged inside the die using corresponding internal and external punches. One or more dies may be used in the swaging process. A single stage press may be used or a press have multiple dies may also be used.
A rotary tablet press is an example of a multiple die press. It is
Currently, lead free airgun pellets are constructed out of hard alloys resulting in these types of pellets to ricochet back towards the shooter when striking a hard surface such as a rock, a steel plate and a concrete wall at a distance of at least ten meters. It is also known that airgun pellets constructed out of lead also have the tendency to ricochet when striking a hard surface.
It is desirable that the lead free, frangible airgun pellet have an accuracy capability of grouping five shots within the area of a Canadian quarter utilizing an inexpensive spring type air rifle at a distance of ten meters.
OBJECT OF THE INVENTION
It is the object of this invention to provide an accurate, lead free, accurate airgun pellet that breaks apart into small pieces when striking a hard surface such as a rock, a steel plate and a concrete wall at a distance of ten meters or more having an initial muzzle velocity of less than five hundred feet per second constructed from metal particles and swaged to a desired hardness using a suitable die known in the arts.
The shank of the said airgun pellet may have one or more different diameters. There may be an angled step of one degree to ninety degrees between each of the diameters.
SUMMARY OF THE INVENTION
The foregoing and further objects and advantages are obtained by manufacturing an accurate, lead free, frangible airgun pellet suitable for air rifles and air pistols from metal particles, swaging or compressing a measured amount of metal particles to a desired hardness using a suitable die known in the arts. The shank of the airgun pellet may have one or more diameters. There may be an angled step one to ninety degrees between each of the diameters.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The current invention achieves the desired results by constructing an accurate, lead free frangible pellet out of metal particles. The metal particles may be from one type of metal or a combination of particles of various metal types. Metal particles such as copper, bronze, brass, tin, zinc, iron, steel, tungsten, tungsten carbide, ferrotungsten, aluminum and bismuth are examples of suitable metal particles. The metal particles may be a powder, granules, flakes, chips, other compactable particulate forms or a combination thereof.
The metal particles may be mixed with a suitable non-toxic flow agent and mixed until a homogenous mixture is obtained. The amount of flow agent added to the metal particles will depend on the preferred rate of flow the mixture requires for maximum production rate efficiency and also the desired frangibility of the airgun pellet. An addition of .2% of flow agent is a good start point.
A pre-measured amount of the homogenous mixture is placed inside a suitable die having the desired dimensions. The homogenous mixture is then swaged inside the die using corresponding internal and external punches. One or more dies may be used in the swaging process. A single stage press may be used or a press have multiple dies may also be used.
A rotary tablet press is an example of a multiple die press. It is
3 recommended that a rotary type press be used if a high rate of production is desired.
The airgun pellet shank of the preferred embodiment will have two diameters and a step between the smaller diameter and the larger diameter. In the preferred embodiment, the larger diameter will be at the back or bottom of the pellet shank. The smaller diameter will be slightly less than the bore diameter of the airgun barrel. Best accuracy was achieved when the larger diameter was about 1.5% more than the smaller diameter.
The preferred embodiment will have a step angle of seven decimal five degrees between the smaller and larger diameter. It was found that the weight of a .22 caliber of the said invention be 14.9 grains for the best accuracy. The preferred embodiment will typically have a five shot group within the area of a Canadian quarter shot at ten meters using an inexpensive spring type air rifle.
If a harder pellet is desired, the swaged pellet may be sintered by processes known to the arts.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention will be further described with reference to the accompanying drawings.
FIG 1 illustrates the airgun pellet having a single diameter with a wadcutter profile.
FIG 2 illustrates the airgun pellet having two diameters and a conical type ogive profile.
FIG 3 illustrates the airgun pellet having two diameters having a forty five degree angle between the smaller and larger diameter with a semi wadcutter ogive profile.
The airgun pellet shank of the preferred embodiment will have two diameters and a step between the smaller diameter and the larger diameter. In the preferred embodiment, the larger diameter will be at the back or bottom of the pellet shank. The smaller diameter will be slightly less than the bore diameter of the airgun barrel. Best accuracy was achieved when the larger diameter was about 1.5% more than the smaller diameter.
The preferred embodiment will have a step angle of seven decimal five degrees between the smaller and larger diameter. It was found that the weight of a .22 caliber of the said invention be 14.9 grains for the best accuracy. The preferred embodiment will typically have a five shot group within the area of a Canadian quarter shot at ten meters using an inexpensive spring type air rifle.
If a harder pellet is desired, the swaged pellet may be sintered by processes known to the arts.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention will be further described with reference to the accompanying drawings.
FIG 1 illustrates the airgun pellet having a single diameter with a wadcutter profile.
FIG 2 illustrates the airgun pellet having two diameters and a conical type ogive profile.
FIG 3 illustrates the airgun pellet having two diameters having a forty five degree angle between the smaller and larger diameter with a semi wadcutter ogive profile.
4 DETAILED DESCRIPTION OF THE DRAWINGS
In FIG 1, the airgun pellet single diameter shank (1) is illustrated. The wadcutter profile (2) is illustrated.
In FIG 2, the larger diameter shank (1) and the smaller diameter shank (2) are illustrated. The conical ogive is illustrated by (3).
In FIG 3, the larger diameter shank is illustrated by (1). A forty five degree step between the smaller diameter shank and the larger diameter shank is illustrated by (2). The smaller diameter shank is illustrated by (3) and the semi wadcutter ogive is illustrated by (4).1) A lead free, airgun pellet having one or more shank diameters comprising of metal particles blended together in a homogenous mixture.
2) The airgun pellet according to claim 1, wherein said particles comprise any one or more of the metals selected from the group consisting of copper, bronze, brass, tin, zinc, iron, steel, tungsten, tungsten carbide, ferrotungsten, aluminum and bismuth.
3) The airgun pellet according to claim 1, wherein the metals particles are in the form of powder, granules, flakes, chips other compactable particulate forms or a combination thereof.
4) The airgun pellet according to claim 1, wherein a non-toxic flow agent may be added to the metal particles to increase flow rate and frangibility.
In FIG 1, the airgun pellet single diameter shank (1) is illustrated. The wadcutter profile (2) is illustrated.
In FIG 2, the larger diameter shank (1) and the smaller diameter shank (2) are illustrated. The conical ogive is illustrated by (3).
In FIG 3, the larger diameter shank is illustrated by (1). A forty five degree step between the smaller diameter shank and the larger diameter shank is illustrated by (2). The smaller diameter shank is illustrated by (3) and the semi wadcutter ogive is illustrated by (4).1) A lead free, airgun pellet having one or more shank diameters comprising of metal particles blended together in a homogenous mixture.
2) The airgun pellet according to claim 1, wherein said particles comprise any one or more of the metals selected from the group consisting of copper, bronze, brass, tin, zinc, iron, steel, tungsten, tungsten carbide, ferrotungsten, aluminum and bismuth.
3) The airgun pellet according to claim 1, wherein the metals particles are in the form of powder, granules, flakes, chips other compactable particulate forms or a combination thereof.
4) The airgun pellet according to claim 1, wherein a non-toxic flow agent may be added to the metal particles to increase flow rate and frangibility.
Claims (9)
In FIG 1, the airgun pellet single diameter shank (1) is illustrated. The wadcutter profile (2) is illustrated.
In FIG 2, the larger diameter shank (1) and the smaller diameter shank (2) are illustrated. The conical ogive is illustrated by (3).
In FIG 3, the larger diameter shank is illustrated by (1). A forty five degree step between the smaller diameter shank and the larger diameter shank is illustrated by (2). The smaller diameter shank is illustrated by (3) and the semi wadcutter ogive is illustrated by (4).
1) A lead free, airgun pellet having one or more shank diameters comprising of metal particles blended together in a homogenous mixture.
2) The airgun pellet according to claim 1, wherein said particles comprise any one or more of the metals selected from the group consisting of copper, bronze, brass, tin, zinc, iron, steel, tungsten, tungsten carbide, ferrotungsten, aluminum and bismuth.
3) The airgun pellet according to claim 1, wherein the metals particles are in the form of powder, granules, flakes, chips other compactable particulate forms or a combination thereof.
4) The airgun pellet according to claim 1, wherein a non-toxic flow agent may be added to the metal particles to increase flow rate and frangibility.
5) The airgun pellet according to claim 1, wherein there is an angled step from one to ninety degrees between the smaller diameter shank and the larger diameter shank if the airgun pellet has more than one diameter.
6) The airgun pellet according to claim 1, wherein the airgun pellet having an initial muzzle velocity of less than five hundred feet per second will break into small particles when striking a hard surface such as a rock, a metal plate or concrete at a distance of least ten meters.
7) The airgun pellet according to claim 1, wherein the airgun pellet will have the accuracy capability of placing five shots within the space of a Canadian quarter shot at a distance of ten meters using an inexpensive spring type air rifle.
8) A method of manufacturing an accurate, lead free, frangible airgun pellet comprising the steps of:
blending the metal particles into a homogenous mixture swaging the homogenous mixture in a swaging die to form a swaged airgun pellet
blending the metal particles into a homogenous mixture swaging the homogenous mixture in a swaging die to form a swaged airgun pellet
9) The method according to claim 8, wherein the swaged airgun pellet may be sintered in order to increase the rigidity of the airgun pellet if required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2901657A CA2901657A1 (en) | 2015-08-25 | 2015-08-25 | An accurate lead free frangible airgun pellet and method of making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2901657A CA2901657A1 (en) | 2015-08-25 | 2015-08-25 | An accurate lead free frangible airgun pellet and method of making same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2901657A1 true CA2901657A1 (en) | 2017-02-25 |
Family
ID=58095096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2901657A Abandoned CA2901657A1 (en) | 2015-08-25 | 2015-08-25 | An accurate lead free frangible airgun pellet and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2901657A1 (en) |
-
2015
- 2015-08-25 CA CA2901657A patent/CA2901657A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 20180827 |