CA2986728A1 - Device and method for exterminating unrestrained large pests - Google Patents
Device and method for exterminating unrestrained large pests Download PDFInfo
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- CA2986728A1 CA2986728A1 CA2986728A CA2986728A CA2986728A1 CA 2986728 A1 CA2986728 A1 CA 2986728A1 CA 2986728 A CA2986728 A CA 2986728A CA 2986728 A CA2986728 A CA 2986728A CA 2986728 A1 CA2986728 A1 CA 2986728A1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M27/00—Apparatus having projectiles or killing implements projected to kill the animal, e.g. pierce or shoot, and triggered thereby
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Abstract
A device for exterminating unrestrained large pests includes a barrel housing a piston, the barrel having an interior surface and corresponding interior diameter, an opening and a closed end opposite the opening, the piston connected to at least one rigid elongate member, the elongate member proximate the opening and the piston proximate the closed end, the closed end including a closure adapted to support an explosive gas charge, a percussion expandable seal mounted to the piston opposite the elongate member, the seal having a seal diameter less than the interior diameter of the barrel, a biasing member for resiliently urging the piston toward the closure, the piston having a piston diameter less than the interior diameter of the barrel, wherein when activated, gas from the charge explosively drives the elongate member through the opening of the barrel and forces the seal substantially flush against the interior surface of the barrel.
Description
DEVICE AND METHOD FOR EXTERMINATING UNRESTRAINED LARGE PESTS
Field The present application relates to a device and method for exterminating unrestrained large pests, and in particular, relates to a device for exterminating unrestrained large pests without the use of projectiles.
Background Large pests, such as but not limited to deer, raccoon, coyote, elk and kangaroo, can live virtually anywhere, including urban areas, where they may cause damage to gardens, lawns, food crops and property. Not only may large pests devour gardens and plants, they may also carry disease.
Furthermore, car accidents involving large pests are a growing issue. Drivers must be extra vigilant, especially on highways, to avoid hitting large pests jumping or swerving in front of their vehicles unexpectedly.
Small pests such as bugs, insects, and rodents may also be a nuisance.
However, as compared to large pests, small pests are relatively more easily controlled and/or exterminated, for example by using baited traps. Due to the comparatively smaller size and reduced strength of a small pest, as compared to a large pest, it is generally easier to design a baited trap to effectively control small pests.
For the reasons discussed above, urban areas are often in need for pest management strategies to address the problems or nuisances caused by large pests. In the prior art of which the Applicant is aware, devices for killing large pests utilize projectiles, such as firearms which utilize bullets, shells or other projectiles which are propelled from the firearm with explosive force.
Bows and arrows, including crossbows, are further examples of devices used to kill large animals, which devices also use projectiles including bolts, arrows or other projectiles to penetrate and kill, or injure, the pest. However, the use of firearms, bows or crossbows for killing large pests in urban areas is not advisable. Various laws and regulations will typically ban or severely restrict the use of firearms, bows or crossbows in or near urban areas. Furthermore, the potential harm caused by a stray bullet or other projectile generally outweighs any benefit to the use of such devices in urban areas for exterminating large pests, as a stray projectile may injure or kill a person or pet when such devices are used in urban areas.
In other prior art of which the Applicant is aware, captive bolt pistols and the like are used in slaughterhouses to induce unconsciousness in restrained or captive animals, while keeping the animal's heart beating, prior to slaughtering the animal. Captive bolt pistols and like devices are generally configured to be used on a restrained animal at a close range, such that the animal is not able to escape before the captive bolt pistol is actuated.
Summary In one aspect of the present disclosure, a device is provided for exterminating unrestrained large pests. In particular, the device does not utilize any projectiles, nor does it require the large pest be restrained. Such a device may be particularly useful, for example, in urban areas where the use of firearms, bows or other killing devices are banned or restricted.
Advantageously, the device does not utilize projectiles and thus does not pose a threat of unintended injury or death caused by stray projectiles. Thus, the device may be used in urban areas to manage large pests, without risking the lives or safety of others.
In another aspect, a device for exterminating unrestrained large pests includes a barrel housing a piston, the barrel having an interior surface and a corresponding interior diameter, an opening and a closed end opposite the opening, the barrel further having a centroidal axis, a piston connected to at least one rigid elongate member, the elongate member proximate to the opening and substantially coextensive with the centroidal axis and the piston proximate to the closed end, and the closed end including a closure releasably fastened to the closed end, the closure adapted to support an explosive gas charge, a percussion expandable seal mounted to the piston opposite the elongate member, the seal having a seal diameter less than the interior diameter of the barrel, a biasing member for resiliently urging the piston toward the closure, the opening including a stop for retaining the piston within the barrel, the stop adjacent the opening, and the piston having a piston diameter less than the interior diameter of the barrel, wherein when activated, gas from the explosive gas charge explosively drives the at least one elongate member through the opening of the barrel, and the gas from the explosive gas charge forces the seal substantially flush against the interior surface of the barrel.
In some aspects, the piston diameter may be substantially equal to 95% of the interior diameter of the barrel and the resting diameter of the percussion expandable seal may be substantially equal to 97.5% of the interior diameter of the barrel.
Field The present application relates to a device and method for exterminating unrestrained large pests, and in particular, relates to a device for exterminating unrestrained large pests without the use of projectiles.
Background Large pests, such as but not limited to deer, raccoon, coyote, elk and kangaroo, can live virtually anywhere, including urban areas, where they may cause damage to gardens, lawns, food crops and property. Not only may large pests devour gardens and plants, they may also carry disease.
Furthermore, car accidents involving large pests are a growing issue. Drivers must be extra vigilant, especially on highways, to avoid hitting large pests jumping or swerving in front of their vehicles unexpectedly.
Small pests such as bugs, insects, and rodents may also be a nuisance.
However, as compared to large pests, small pests are relatively more easily controlled and/or exterminated, for example by using baited traps. Due to the comparatively smaller size and reduced strength of a small pest, as compared to a large pest, it is generally easier to design a baited trap to effectively control small pests.
For the reasons discussed above, urban areas are often in need for pest management strategies to address the problems or nuisances caused by large pests. In the prior art of which the Applicant is aware, devices for killing large pests utilize projectiles, such as firearms which utilize bullets, shells or other projectiles which are propelled from the firearm with explosive force.
Bows and arrows, including crossbows, are further examples of devices used to kill large animals, which devices also use projectiles including bolts, arrows or other projectiles to penetrate and kill, or injure, the pest. However, the use of firearms, bows or crossbows for killing large pests in urban areas is not advisable. Various laws and regulations will typically ban or severely restrict the use of firearms, bows or crossbows in or near urban areas. Furthermore, the potential harm caused by a stray bullet or other projectile generally outweighs any benefit to the use of such devices in urban areas for exterminating large pests, as a stray projectile may injure or kill a person or pet when such devices are used in urban areas.
In other prior art of which the Applicant is aware, captive bolt pistols and the like are used in slaughterhouses to induce unconsciousness in restrained or captive animals, while keeping the animal's heart beating, prior to slaughtering the animal. Captive bolt pistols and like devices are generally configured to be used on a restrained animal at a close range, such that the animal is not able to escape before the captive bolt pistol is actuated.
Summary In one aspect of the present disclosure, a device is provided for exterminating unrestrained large pests. In particular, the device does not utilize any projectiles, nor does it require the large pest be restrained. Such a device may be particularly useful, for example, in urban areas where the use of firearms, bows or other killing devices are banned or restricted.
Advantageously, the device does not utilize projectiles and thus does not pose a threat of unintended injury or death caused by stray projectiles. Thus, the device may be used in urban areas to manage large pests, without risking the lives or safety of others.
In another aspect, a device for exterminating unrestrained large pests includes a barrel housing a piston, the barrel having an interior surface and a corresponding interior diameter, an opening and a closed end opposite the opening, the barrel further having a centroidal axis, a piston connected to at least one rigid elongate member, the elongate member proximate to the opening and substantially coextensive with the centroidal axis and the piston proximate to the closed end, and the closed end including a closure releasably fastened to the closed end, the closure adapted to support an explosive gas charge, a percussion expandable seal mounted to the piston opposite the elongate member, the seal having a seal diameter less than the interior diameter of the barrel, a biasing member for resiliently urging the piston toward the closure, the opening including a stop for retaining the piston within the barrel, the stop adjacent the opening, and the piston having a piston diameter less than the interior diameter of the barrel, wherein when activated, gas from the explosive gas charge explosively drives the at least one elongate member through the opening of the barrel, and the gas from the explosive gas charge forces the seal substantially flush against the interior surface of the barrel.
In some aspects, the piston diameter may be substantially equal to 95% of the interior diameter of the barrel and the resting diameter of the percussion expandable seal may be substantially equal to 97.5% of the interior diameter of the barrel.
2 In other aspects, the device may further include a percussion expandable seal in the form of a cup, the cup having a bottom surface and a wall defining a cup opening, the bottom surface mountable to a face of the piston so as to orient the cup opening towards the barrel closure. The cup may be manufactured of a fabric-reinforced rubber. Further, the face of the piston adjacent to the percussion expandable seal may include a raised centre abutting the bottom surface of the seal.
In other aspects, the at least one elongate member is selected from a group comprising a spear, an arrow, a bolt having a rounded point and a bolt having a sharp point.
In other aspects, the stop for retaining the piston within the barrel is a resilient ring, wherein the resilient ring may be manufactured of neoprene.
In other aspects, the biasing member may be a coiled spring.
In other aspects, the device may be anchored proximate to a bait for attracting a pest. The device may be anchored proximate to a feed canister containing the bait, the feed canister having a closed end and an open end, the closed end defining a cavity for containing bait, the open end adapted to guide a mouth of the pest towards the cavity, wherein the barrel opening is oriented proximate to the open end of the feed canister.
In other aspects, upon activating the explosive gas charge, the elongate member travels through the opening of the barrel along the centroidal axis, intersecting the open end of the feed canister.
Further, the feed canister and the device may each be mounted to a support structure on a ground so as to elevate the open end of the feed canister to a mouth height of the pest above the ground. The device may be anchored proximate to the feed canister so as to orient the opening of the barrel toward a forehead of a pest's skull.
In other aspects, a method for exterminating unrestrained large pests may comprise the steps of anchoring the device so as to orient the opening of the barrel proximate to a bait; supporting an explosive gas charge on the closure; mounting the closure to the closed end;
and remotely activating the explosive gas charge when a skull of a pest is positioned proximate the opening of the barrel. The explosive gas charge may be a sodium azide charge. Further, the device may be remotely actuated by actuating a switch or trigger operatively connected to the explosive gas charge and a power source.
In other aspects, the at least one elongate member is selected from a group comprising a spear, an arrow, a bolt having a rounded point and a bolt having a sharp point.
In other aspects, the stop for retaining the piston within the barrel is a resilient ring, wherein the resilient ring may be manufactured of neoprene.
In other aspects, the biasing member may be a coiled spring.
In other aspects, the device may be anchored proximate to a bait for attracting a pest. The device may be anchored proximate to a feed canister containing the bait, the feed canister having a closed end and an open end, the closed end defining a cavity for containing bait, the open end adapted to guide a mouth of the pest towards the cavity, wherein the barrel opening is oriented proximate to the open end of the feed canister.
In other aspects, upon activating the explosive gas charge, the elongate member travels through the opening of the barrel along the centroidal axis, intersecting the open end of the feed canister.
Further, the feed canister and the device may each be mounted to a support structure on a ground so as to elevate the open end of the feed canister to a mouth height of the pest above the ground. The device may be anchored proximate to the feed canister so as to orient the opening of the barrel toward a forehead of a pest's skull.
In other aspects, a method for exterminating unrestrained large pests may comprise the steps of anchoring the device so as to orient the opening of the barrel proximate to a bait; supporting an explosive gas charge on the closure; mounting the closure to the closed end;
and remotely activating the explosive gas charge when a skull of a pest is positioned proximate the opening of the barrel. The explosive gas charge may be a sodium azide charge. Further, the device may be remotely actuated by actuating a switch or trigger operatively connected to the explosive gas charge and a power source.
3 Brief Description of the Drawings Figure 1 is side elevation view of an embodiment of the present invention.
Figure 2 is a cut-away, side elevation view of a portion of the embodiment shown in Figure 1.
Figure 3 is an exploded view of a portion of the embodiment shown in Figure 1.
Detailed Description In one aspect of the present disclosure, an embodiment of the device 11, as viewed in Figures 1 and 2, includes a barrel 1 having a centroidal axis C. As may be best viewed in Figure 2, the barrel 1 includes an opening 2 and a closed end 3, the closed end 3 opposite the opening 2. The closed end 3 includes a closure 3a which is adapted to releasably fasten to the closed end 3, such as a plate secured by bolts or other fasteners, and adapted to support an explosive gas charge 6.
The barrel 1, having an interior surface la and a corresponding interior diameter D, is adapted to house a piston 4 proximate to the closed end 3. At least one rigid elongate member 5 is mounted to, or otherwise extends from, the piston 4. The elongate member 5 includes a penetrating end 5a oriented towards and proximate to the opening 2 and may be substantially coextensive with the centroidal axis C
of the barrel 1. The elongate member 5 may include, for example, a spear, an arrow, a bolt having a rounded point or a bolt having a sharp point. Although only one elongate member 5 is shown in the Figures, it will be appreciated by a person skilled in the art that the piston
Figure 2 is a cut-away, side elevation view of a portion of the embodiment shown in Figure 1.
Figure 3 is an exploded view of a portion of the embodiment shown in Figure 1.
Detailed Description In one aspect of the present disclosure, an embodiment of the device 11, as viewed in Figures 1 and 2, includes a barrel 1 having a centroidal axis C. As may be best viewed in Figure 2, the barrel 1 includes an opening 2 and a closed end 3, the closed end 3 opposite the opening 2. The closed end 3 includes a closure 3a which is adapted to releasably fasten to the closed end 3, such as a plate secured by bolts or other fasteners, and adapted to support an explosive gas charge 6.
The barrel 1, having an interior surface la and a corresponding interior diameter D, is adapted to house a piston 4 proximate to the closed end 3. At least one rigid elongate member 5 is mounted to, or otherwise extends from, the piston 4. The elongate member 5 includes a penetrating end 5a oriented towards and proximate to the opening 2 and may be substantially coextensive with the centroidal axis C
of the barrel 1. The elongate member 5 may include, for example, a spear, an arrow, a bolt having a rounded point or a bolt having a sharp point. Although only one elongate member 5 is shown in the Figures, it will be appreciated by a person skilled in the art that the piston
4 may be connected to multiple elongate members 5, the penetrating end 5a of each elongate member 5 being oriented toward and proximate to, the opening 2 of the barrel 1.
The device further includes a percussion expandable seal 7. The percussion expandable seal 7 may be mounted to the piston 4 opposite the elongate member 5, and proximate to the closed end 3, as shown for example in Figure 2.
A biasing member 8, such as a coiled spring, may be mounted between the piston and a stop 9, which resiliently urges the piston 4 toward the closure 3a. The biasing member may be a coiled spring, as shown in Figure 2, or any other resilient, biasing member known to a person skilled in the art.
The barrel 1 further houses a stop 9, adjacent to the opening 2. The stop 9 retains the piston 4 within the barrel 1 after the device 11 has been activated, ensuring the elongate member 5 does not escape the barrel 1 when the device is attached. The stop 9 may be a resilient ring having an aperture 9a and a surface 9b, as shown in Figure 3, and may be manufactured of neoprene.
In use, when the device is activated, the penetrating end 5a of the at least one elongate member 5 passes through the aperture 9a, while a surface 4c of the piston comes to rest against the surface 9b of the stop. The piston 4 has a piston diameter E and the percussion expandable seal 7 has a seal diameter F, each of the diameters E and F being less than the interior diameter D of the barrel 1.
Preferably, the piston 4 and seal 7 are not tightly fitted within the barrel 1 to facilitate high speed of the piston 4 upon activation of the explosive gas charge 6. For example, without intending to be limiting, the diameter E of piston 4a may be substantially equal to 95% of the interior diameter D of barrel 1, and the diameter F of the expandable seal 7, when at rest, may be substantially equal to 97.5% of the interior diameter D of barrel 1.
An explosive gas charge 6 may be used to activate the device 11. Without intending to be limiting, the explosive gas charge may comprise sodium azide, such as the charges that are typically used in the automobile industry for actuating air bags in vehicles. For example, the applicant has found the sodium azide gas charge part number DTN6OH, purchased from the supplier Jilin Province Detiannuo Automobile Safety System Co., Ltd. from the website www.dtnairbag.com, was suitable for use in the prototype device for exterminating deer, the dimensions for which are described below. Gas from the charge 6 forces the percussion expandable seal 7 substantially flush against the interior surface la of the barrel 1, creating a seal to reduce pressure reduction caused by gas passing the piston 4. The pressure from the explosive gas charge 6 explosively drives the elongate member through the opening 2 of the barrel 1.
Optionally, in some embodiments as shown in Figure 3, the percussion expandable seal 7 may be a cup, having a bottom surface 7c and wall 7b defining a cup opening 7d.
The bottom surface 7c of the cup 7 is mountable to a face 4a of the piston 4 so that the cup opening 7d is proximate to and faces the barrel closure 3a. Furthermore, as viewed in Figure 3, the face 4a of the piston may include a raised centre 4b abutting the bottom surface 7c of the cup. When the explosive gas charge is activated 6, the wall 7b of the percussion expandable seal 7 is urged against the interior surface la of the barrel, creating a seal to contain the gas between the closed end 3 and the piston 4.
The bottom surface 7c may further include a bleed hole 7a, located near the center of the bottom surface, so as to release residual pressure from an activated gas charge 6, thereby allowing the piston to return to its starting position.
The device further includes a percussion expandable seal 7. The percussion expandable seal 7 may be mounted to the piston 4 opposite the elongate member 5, and proximate to the closed end 3, as shown for example in Figure 2.
A biasing member 8, such as a coiled spring, may be mounted between the piston and a stop 9, which resiliently urges the piston 4 toward the closure 3a. The biasing member may be a coiled spring, as shown in Figure 2, or any other resilient, biasing member known to a person skilled in the art.
The barrel 1 further houses a stop 9, adjacent to the opening 2. The stop 9 retains the piston 4 within the barrel 1 after the device 11 has been activated, ensuring the elongate member 5 does not escape the barrel 1 when the device is attached. The stop 9 may be a resilient ring having an aperture 9a and a surface 9b, as shown in Figure 3, and may be manufactured of neoprene.
In use, when the device is activated, the penetrating end 5a of the at least one elongate member 5 passes through the aperture 9a, while a surface 4c of the piston comes to rest against the surface 9b of the stop. The piston 4 has a piston diameter E and the percussion expandable seal 7 has a seal diameter F, each of the diameters E and F being less than the interior diameter D of the barrel 1.
Preferably, the piston 4 and seal 7 are not tightly fitted within the barrel 1 to facilitate high speed of the piston 4 upon activation of the explosive gas charge 6. For example, without intending to be limiting, the diameter E of piston 4a may be substantially equal to 95% of the interior diameter D of barrel 1, and the diameter F of the expandable seal 7, when at rest, may be substantially equal to 97.5% of the interior diameter D of barrel 1.
An explosive gas charge 6 may be used to activate the device 11. Without intending to be limiting, the explosive gas charge may comprise sodium azide, such as the charges that are typically used in the automobile industry for actuating air bags in vehicles. For example, the applicant has found the sodium azide gas charge part number DTN6OH, purchased from the supplier Jilin Province Detiannuo Automobile Safety System Co., Ltd. from the website www.dtnairbag.com, was suitable for use in the prototype device for exterminating deer, the dimensions for which are described below. Gas from the charge 6 forces the percussion expandable seal 7 substantially flush against the interior surface la of the barrel 1, creating a seal to reduce pressure reduction caused by gas passing the piston 4. The pressure from the explosive gas charge 6 explosively drives the elongate member through the opening 2 of the barrel 1.
Optionally, in some embodiments as shown in Figure 3, the percussion expandable seal 7 may be a cup, having a bottom surface 7c and wall 7b defining a cup opening 7d.
The bottom surface 7c of the cup 7 is mountable to a face 4a of the piston 4 so that the cup opening 7d is proximate to and faces the barrel closure 3a. Furthermore, as viewed in Figure 3, the face 4a of the piston may include a raised centre 4b abutting the bottom surface 7c of the cup. When the explosive gas charge is activated 6, the wall 7b of the percussion expandable seal 7 is urged against the interior surface la of the barrel, creating a seal to contain the gas between the closed end 3 and the piston 4.
The bottom surface 7c may further include a bleed hole 7a, located near the center of the bottom surface, so as to release residual pressure from an activated gas charge 6, thereby allowing the piston to return to its starting position.
5 The percussion expandable seal 7 must withstand high amounts of pressure from the explosive gas charge 6. Thus, a strong and resilient material is preferred for the seal 7, such as a fabric-reinforced rubber seal commonly used in hydraulic applications. However, it will be appreciated that other materials may be used to manufacture seal 7 and are within the scope of the present disclosure. The seal 7, biasing device 8, stop 9 and other portions of the device 11 may wear over time and may require replacement.
The device 11 may be anchored proximate to a source of food or bait for attracting the pest and positioning the skull S of the unrestrained pest proximate the opening 2 of the device 11. For example, a portion of food may be mounted to a support, positioning the portion of food proximate the opening 2 of the device. As another example, any feed canister or similar container, having a closed end 10a defining a cavity for containing food or other bait, and an open end 10b, would be suitable. The open end 10b of the feed canister 10 is adapted to guide a mouth of the pest towards the cavity and the bait B. The opening 2 of the barrel 1, when the device 11 is anchored proximate to a feed canister 10, may be oriented proximate to the open end 10b of the feed canister 10.
Further, the device 11 and the feed canister 10 may be anchored to a support structure 22 on the ground so that the device 11 and feed canister 10 may be elevated so that the open end 10b of the feed canister 10 is positioned approximately at the mouth height of a targeted pest and the opening 2 of the barrel 1 may be oriented toward a forehead of the targeted pest. When the explosive gas charge 6 is activated, the elongate member 5 will travel through the opening 2 of the barrel 1, along the centroidal axis C and intersect with the open end 10b of the feed canister 10, striking a skull S of the targeted pest, for example in the forehead area of the skull S.
The support structure 22 serves the function of elevating and anchoring the device 11 and feed canister 10 at a desired elevation, based on the size and configuration of the targeted pest. It will be appreciated that different materials and configurations of the support structure 22 may be used so as to effectively elevate and anchor the device 11 and feed canister 10.
Furthermore, the mounting bracket 20, as shown in Figure 1, anchors the device 11 to the support structure 22, positioning the opening 2 of device 11 relative to the feed canister 10.
Preferably, the explosive gas charge 6 may be activated remotely by a user, for example by using a hand trigger or switch 14 operatively connected to the gas charge 6 and a power source 18 by means of a wire or cable 16. In other embodiments, the trigger or switch 14 may be operatively connected to
The device 11 may be anchored proximate to a source of food or bait for attracting the pest and positioning the skull S of the unrestrained pest proximate the opening 2 of the device 11. For example, a portion of food may be mounted to a support, positioning the portion of food proximate the opening 2 of the device. As another example, any feed canister or similar container, having a closed end 10a defining a cavity for containing food or other bait, and an open end 10b, would be suitable. The open end 10b of the feed canister 10 is adapted to guide a mouth of the pest towards the cavity and the bait B. The opening 2 of the barrel 1, when the device 11 is anchored proximate to a feed canister 10, may be oriented proximate to the open end 10b of the feed canister 10.
Further, the device 11 and the feed canister 10 may be anchored to a support structure 22 on the ground so that the device 11 and feed canister 10 may be elevated so that the open end 10b of the feed canister 10 is positioned approximately at the mouth height of a targeted pest and the opening 2 of the barrel 1 may be oriented toward a forehead of the targeted pest. When the explosive gas charge 6 is activated, the elongate member 5 will travel through the opening 2 of the barrel 1, along the centroidal axis C and intersect with the open end 10b of the feed canister 10, striking a skull S of the targeted pest, for example in the forehead area of the skull S.
The support structure 22 serves the function of elevating and anchoring the device 11 and feed canister 10 at a desired elevation, based on the size and configuration of the targeted pest. It will be appreciated that different materials and configurations of the support structure 22 may be used so as to effectively elevate and anchor the device 11 and feed canister 10.
Furthermore, the mounting bracket 20, as shown in Figure 1, anchors the device 11 to the support structure 22, positioning the opening 2 of device 11 relative to the feed canister 10.
Preferably, the explosive gas charge 6 may be activated remotely by a user, for example by using a hand trigger or switch 14 operatively connected to the gas charge 6 and a power source 18 by means of a wire or cable 16. In other embodiments, the trigger or switch 14 may be operatively connected to
6 the gas charge 6 and a power source through a wireless electronic communication device, or by any other suitable means for operatively connecting the trigger or switch to the gas charge 6 so as to remotely activate the gas charge. In use, when a pest is feeding at the feed canister 10, the user of the device may observe the pest from a distance and activate the device 11 using trigger or switch 14 when .. skull S is observed to be in position to be penetrated by the end 5a of elongate member 5.
It will be appreciated by a person skilled in the art that different sizes and configurations of the device 11 are possible to allow the device to be used for exterminating different types of targeted large pests. For example, if the targeted pest is a deer, the Applicant has found that using a barrel 1 having an interior diameter D of approximately 2.50 inches and a stroke length L of approximately 6.89 inches, a .. piston having a diameter E of approximately 2.375 inches, the seal 7 having an at rest diameter F of approximately 2.44 inches, the piston actuated by a sodium azide charge 6, will cause the elongate member 5 to travel in direction Z at a velocity of, for example, approximately 600 ft/s upon activating the charge, producing sufficient force to penetrate the forehead of the deer's skull S. However, it will be appreciated by a person skilled in the art that the example dimensions disclosed above may be configured so as to effectively exterminate large pests other than deer. For example, to use the device 11 for exterminating a wild pig, a larger barrel 1 and longer stroke may be required.
It will be appreciated by a person skilled in the art that different sizes and configurations of the device 11 are possible to allow the device to be used for exterminating different types of targeted large pests. For example, if the targeted pest is a deer, the Applicant has found that using a barrel 1 having an interior diameter D of approximately 2.50 inches and a stroke length L of approximately 6.89 inches, a .. piston having a diameter E of approximately 2.375 inches, the seal 7 having an at rest diameter F of approximately 2.44 inches, the piston actuated by a sodium azide charge 6, will cause the elongate member 5 to travel in direction Z at a velocity of, for example, approximately 600 ft/s upon activating the charge, producing sufficient force to penetrate the forehead of the deer's skull S. However, it will be appreciated by a person skilled in the art that the example dimensions disclosed above may be configured so as to effectively exterminate large pests other than deer. For example, to use the device 11 for exterminating a wild pig, a larger barrel 1 and longer stroke may be required.
7
Claims (17)
1. A device for exterminating unrestrained large pests, comprising:
a barrel housing a piston, the barrel having an interior surface and a corresponding interior diameter, an opening and a closed end opposite the opening, the barrel further having a centroidal axis;
the piston connected to at least one rigid elongate member, the elongate member proximate to the opening and substantially coextensive with the centroidal axis and the piston proximate to the closed end, the closed end including a closure releasably fastened to the closed end, the closure adapted to support an explosive gas charge;
a percussion expandable seal mounted to the piston opposite the elongate member, the seal having a resting seal diameter less than the interior diameter of the barrel;
a biasing member for resiliently urging the piston toward the closure;
the opening including a stop for retaining the piston within the barrel, the stop adjacent the opening;
the piston having a piston diameter less than the interior diameter of the barrel;
wherein when activated, gas from the explosive gas charge explosively drives the at least one elongate member through the opening of the barrel, and wherein gas from the explosive gas charge forces the seal substantially flush against the interior surface of the barrel.
a barrel housing a piston, the barrel having an interior surface and a corresponding interior diameter, an opening and a closed end opposite the opening, the barrel further having a centroidal axis;
the piston connected to at least one rigid elongate member, the elongate member proximate to the opening and substantially coextensive with the centroidal axis and the piston proximate to the closed end, the closed end including a closure releasably fastened to the closed end, the closure adapted to support an explosive gas charge;
a percussion expandable seal mounted to the piston opposite the elongate member, the seal having a resting seal diameter less than the interior diameter of the barrel;
a biasing member for resiliently urging the piston toward the closure;
the opening including a stop for retaining the piston within the barrel, the stop adjacent the opening;
the piston having a piston diameter less than the interior diameter of the barrel;
wherein when activated, gas from the explosive gas charge explosively drives the at least one elongate member through the opening of the barrel, and wherein gas from the explosive gas charge forces the seal substantially flush against the interior surface of the barrel.
2. The device of claim 1 wherein the piston diameter is substantially equal to 95% of the interior diameter of the barrel and the resting diameter of the seal is substantially equal to 97.5% of the interior diameter of the barrel.
3. The device of claim 1 wherein the percussion expandable seal is a cup, the cup having a bottom surface and a wall defining a cup opening, the bottom surface mountable to a face of the piston so as to orient the cup opening towards the barrel closure.
4. The device of claim 3 wherein the face of the piston adjacent to the percussion expandable seal includes a raised centre abutting the bottom surface of the seal.
5. The device of claim 3 wherein the cup is manufactured of a fabric-reinforced rubber.
6. The device of claim 1 wherein the biasing member is a coiled spring.
7. The device of claim 1 wherein the stop for retaining the piston within the barrel is a resilient ring.
8. The device of claim 7 wherein the resilient ring is manufactured of neoprene.
9. The device of claim 1 wherein the at least one elongate member is selected from a group comprising: a spear; an arrow; a bolt having a rounded point; a bolt having a sharp point.
10. The device of claim 1 wherein the barrel opening of the device is anchored proximate to a bait.
11. The device of claim 10 wherein the device is anchored proximate to a feed canister containing the bait, the feed canister having a closed end and an open end, the closed end defining a cavity for containing the bait, the open end adapted to guide a mouth of the pest towards the cavity, wherein the barrel opening is oriented proximate to the open end of the feed canister.
12. The device of claim 11 wherein upon activating the explosive gas charge, the elongate member travels through the opening of the barrel along the centroidal axis, intersecting the open end of the feed canister.
13. The device of claim 12 wherein the feed canister and the device are each mounted to a support structure on a ground so as to elevate the open end of the feed canister to a mouth height of the pest above the ground.
14. The device of claim 13 wherein the device is anchored proximate to the feed canister so as to orient the opening of the barrel toward a forehead of a skull.
15. The device of claim 1 wherein the explosive gas charge is a sodium azide charge.
16. A method for exterminating unrestrained large pests, comprising the steps of:
anchoring the device of claim 1 so as to orient the opening of the barrel proximate a bait;
supporting an explosive gas charge on the closure;
mounting the closure to the closed end; and remotely activating the explosive gas charge when a skull of a pest is positioned proximate the opening of the barrel.
anchoring the device of claim 1 so as to orient the opening of the barrel proximate a bait;
supporting an explosive gas charge on the closure;
mounting the closure to the closed end; and remotely activating the explosive gas charge when a skull of a pest is positioned proximate the opening of the barrel.
17. The method of claim 16 wherein the device is remotely actuated by actuating a switch operatively connected to the explosive gas charge and a power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2986728A CA2986728A1 (en) | 2017-11-27 | 2017-11-27 | Device and method for exterminating unrestrained large pests |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2986728A CA2986728A1 (en) | 2017-11-27 | 2017-11-27 | Device and method for exterminating unrestrained large pests |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2986728A1 true CA2986728A1 (en) | 2019-05-27 |
Family
ID=66657450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2986728A Abandoned CA2986728A1 (en) | 2017-11-27 | 2017-11-27 | Device and method for exterminating unrestrained large pests |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2986728A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220039369A1 (en) * | 2020-08-05 | 2022-02-10 | The United States Of America, As Represented By The Secretary Of Agriculture | Electromechanical pest animal suppression trap |
-
2017
- 2017-11-27 CA CA2986728A patent/CA2986728A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220039369A1 (en) * | 2020-08-05 | 2022-02-10 | The United States Of America, As Represented By The Secretary Of Agriculture | Electromechanical pest animal suppression trap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20210831 |
|
| FZDE | Discontinued |
Effective date: 20210831 |