• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for catching rodents in a sewage system. The method comprises the steps of: a) attaching one end of a support line to a rodent trap; b) lowering said rodent trap down a manhole in the sewage system by means of said support line to a position above the benching of the bottom part of the manhole, and keeping an end of said support line above said manhole; c) positioning said rodent trap directly or indirectly into contact with the wall of the bottom part of the manhole such that said rodent trap is prevented from spinning around when hanging in said support line; and d) tightening said support line and attaching the other end of said support line in the upper part of the manhole.
    公开号:DK201901245A1
    申请号:DKP201901245
    申请日:2019-10-23
    公开日:2021-06-09
    发明作者:Knudsen Hans
    申请人:Ratel Aps；
    IPC主号:
    专利说明:

    DK 2019 01245 A1 Method for positioning a rodent trap in a sewage system, and rodent trap for use in sewage systems Field of the Invention The present invention relates to the field of traps for rats and other rodents and in particular relates to traps for use in sewage systems. Background of the Invention A number of traps are known in the art. Types are known using poison for killing rodents and further a number of traps are known that are poison free. The poison free traps generally fall in two categories, these being mechanical traps and electrical traps. Electrical traps are characterised by the killing mechanism being an electrical shock device almost instantly killing the rodent. Mechanical traps are characterised by killing means that strikes the rodent and almost instantly kills the rodent. The killing means in mechanical traps are normally spring driven or gas pressure driven.
    When operating a trap in a sewage system, the trap will normally be fixed in relation to a downstream sewage pipe or possibly to the sewage manhole wall. This means that a reduction of the flow area or an increase in flow resistance of the sewage pipe is introduced and a potential risk of clogging the pipe is hereby introduced.
    Traditional traps have the disadvantage that they are difficult or impossible to install in older sewage systems, which is a paradox, as these sewage systems often are those in most need of rodent control. Sewage systems with a reduced flow capacity will also be difficult for the traditional traps to operate in as the
    , DK 2019 01245 A1 increase in flow resistance will significantly reduce the sewage system basic function.
    Often there is a desire to frequently flush the sewage system and, in such circumstances, the traditional traps will have disadvantages. The flushing will in many instances remove the traps from their location, and risk blocking the outlet. Additionally, the traditional methods are focused on killing rodents moving downstream to the manhole, thereby failing to kill the rodents that are living upstream to the manhole. Object of the Invention The objective of the present invention is to provide a rodent trap that will allow for a decreased obstruction of the sewage pipe and hence reduce the risk of clogging of the sewage system. Description of the Invention A first aspect of the present invention relates to a method for positioning a rodent trap in a sewage system comprising the steps of: - attaching one end of a support line to a rodent trap; - lowering said rodent trap down a manhole in the sewage system by means of said support line to a position above the benching of the bottom part of the manhole, and keeping an end of said support line above said manhole; - positioning said rodent trap directly or indirectly into contact with the wall of the bottom part of the manhole such that said rodent trap is prevented from spinning around when hanging in said support line; and - tightening said support line and attaching the other end of said support line in the upper part of the manhole.
    2 DK 2019 01245 A1 By positioning the rodent trap in contact with the wall of the bottom part of the manhole, it is ensured that the sewage residue present in the water will not enter the killing device and the killing device will therefore be less prone to operational failure. The sewage pipes running through the manhole via an open channel will, as the free flow diameter is maintained to its full extent, be less prone to clogging and therefore a reduced amount of cleaning of the sewage system and the trap is required. Furthermore, by using the wall as a support, the rodent trap is prevented from spinning around when hanging in said support line.
    The support line has two purposes. It is used as means for lowering the rodent trap into contact with the wall of the bottom part of the manhole. Thereby, no personnel need to enter the manhole during the installation. Furthermore, the support line is used to retain the rodent trap at a desired position into contact, directly or indirectly, with the wall. This is necessary, as a major part of the benching is sloped. The support line may e.g. be a rope or a wire.
    In one or more embodiments, the method further comprises the step of pre- mounting a spacer unit to the rodent trap; wherein said spacer unit is adapted for providing a space between the rodent trap and the wall of the bottom part of the manhole; wherein the positioning step comprises positioning said rodent trap indirectly into contact with the wall of the bottom part of the manhole by positioning said spacer unit directly into contact with the wall of the bottom part of the manhole. The purpose of this step is to position the rodent trap at a favourable spot relative to the benching, while keeping the support effect from the wall of the manhole. Thereby, the rodent trap will remain fixed in its position relative to the manhole benching and wall, even during flooding of the manhole. The spacer unit may have many suitable configurations and shapes. Preferably, the spacer unit is wider than the trap housing, thereby providing more stability. The spacer unit may also be provided with a mounting plate adapted for attachment to the trap housing. Hence, e.g. the spacer unit may be attached to the mounting plate or the spacer may be configured with a mounting plate
    1 DK 2019 01245 A1 adapted for attachment to the trap housing. The spacer unit may in some embodiments extend beyond the bottom of the trap housing. The spacer unit may in some embodiments have a thickness of about 1-50 cm, and a width relatively wider than the trap housing, thereby extending beyond the sides of said housing. Preferably, the thickness is at least 5 cm, such as within the range of 5- 40 cm, e.g. at least 10 cm, such as within the range of 10-30 cm, e.g. at least 20 cm, such as within the range of 20-25 cm.
    In one or more embodiments, the spacer unit is lowered to a position above the benching of the bottom part of the manhole. Thereby, the entire trap is hanging freely from the wire, although limited from rotating. In one or more embodiments, the spacer unit is mounted such that it extends below the rodent trap, and wherein step of positioning said rodent trap includes positioning the spacer unit into contact with the benching of the bottom part of the manhole. This configuration secures that the trap is further secured from moving around, while keeping the rodent entry opening above the benching level. A rat will still be able to enter the housing by standing on its hind legs, while minor flooding of the manhole will not affect the internal parts, such as the killing means or bait, of the housing. To avoid that the rodent trap may slip on the often inclined benching, the step of tightening the support line may comprise tightening the support line such that 0-99% of the total weight of the rodent trap and spacer unit is carried by the support line, such as 1-95%, e.g. 5-90%, such as 10-85%, e.g. 15-80%, such as 20-75%, e.g. 25-70%, such that 30-60% of the weight of the rodent trap is carried by the support line. If a manhole is flooded, air may be trapped within the rodent trap, thereby giving buoyancy to said trap. Hence, a certain weight is needed to keep the rodent trap in place under flooding of the manhole. Hence, in one or more embodiments, the method further comprises the step of pre-mounting a counterweight to the rodent trap to counteract the buoyancy of said rodent trap during flooding of the
    DK 2019 01245 A1 manhole.
    In one or more embodiments, the method further comprises the step of pre-mounting a counterweight to the spacer unit to counteract the buoyancy of said rodent trap during flooding of the manhole.
    Alternatively, the counterweight is configured as a spacer unit adapted for providing a space between the rodent
    5 trap and the wall of the bottom part of the manhole.
    The weight of the counterweight is preferably at least 1 kg, such as within the range of 1-15 kg, e.g. at least 3 kg, such as within the range of 4-14 kg, e.g. at least 5 kg, such as within the range of 5-13 kg, e.g. at least 6 kg, such as within the range of 6-12 kg, e.g. at least 7 kg, such as within the range of 7-11 kg, e.g. at least 8 kg, such as within the range of 8-10 kg, e.g. at least 9 kg.
    A second aspect relates to a rodent trap for being positioned in the bottom part of a manhole in a sewage system, the rodent trap comprising: - a housing with one or more side faces, a top face, and a bottom face, and with a rodent entry opening in one of said side faces or in the bottom face; - a mechanical and/or electrical killing device positioned within said housing; and - a mounting plate; wherein the housing is mounted to said mounting plate; wherein the rodent trap further comprises a spacer unit connected to said mounting plate and extending outwardly therefrom.
    A third aspect relates to a rodent trap for being positioned in the bottom part of a manhole in a sewage system, the rodent trap comprising: - a housing with one or more side faces, a top face, and a bottom face, and with a rodent entry opening in one of said side faces or in the bottom face; - a mechanical and/or electrical killing device positioned within said housing; and - a mounting plate; wherein the housing is mounted to said mounting plate.
    In one or more embodiments, the spacer unit has a weight suitable for counteracting the buoyancy of the rodent trap when submerged in water, such as
    A DK 2019 01245 A1 within the range of 1-15 kg, e.g. at least 2 kg, such as within the range of 4-14 kg, e.g. at least 5 kg, such as within the range of 5-13 kg, e.g. at least 6 kg, such as within the range of 6-12 kg, e.g. at least 7 kg, such as within the range of 7-11 kg, e.g. at least 8 kg, such as within the range of 8-10 kg, e.g. at least 9 kg.
    Advantageously the killing device is a gas cartridge operated device. Such device has shown to be appropriate for such installation. Other types of killing devices may however also be used without limiting the scope of the invention. The gas cartridge operated device has the advantage of being usable in ATEX areas without the risk of igniting gas or flammable fluid. Advantageously a signal indicating the activation of the killing device is transmitted wirelessly to a receiving device located at top of the sewage manhole. Hereby electrical connections between the killing device and a communication device, placed at a distance from the killing device, may be avoided. The communication device eventually has a radio module enabling the device to send mobile network messages to a computer. The means adapted for detecting an activation of the killing device may e.g. be a G-sensor or other type of shock sensor.
    In one or more embodiments, a pressure sensor is positioned within the housing. A signal indicating the pressure within the housing may, in one or more embodiments, be transmitted (by the pressure sensor or a separate signaling means) wirelessly to a receiving device located at top of the sewage system enabling mobile network, such as SMS, communication to a computer or other devices. As used in the specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.
    Ranges may be expressed herein as from "about" or "approximately" one particular value and/or to "about" or "approximately" another particular value. When such a range is expressed, another embodiment includes from the one
    ; DK 2019 01245 A1 particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by use of the antecedent "about", it will be understood that the particular value forms another embodiment.
    It should be noted that embodiments and features described in the context of one of the aspects of the present invention also apply to the other aspects of the invention.
    The invention is described in more detail in the following detailed description of a preferred embodiment, with reference to the figures. Description of the Drawing Figure 1 is a cross-sectional view of a manhole, wherein a rodent trap is mounted in accordance with various embodiments of the invention; Figure 2 is a cross-sectional view of a manhole, wherein a rodent trap is mounted in accordance with various embodiments of the invention; and Figure 3 is a cross-sectional view of a manhole, wherein a rodent trap is mounted in accordance with various embodiments of the invention. Detailed Description of the Invention Figure 1 is a cross-sectional view of a manhole 200, wherein a rodent trap 100 has already been positioned into contact with the wall 210 of the bottom part of the manhole 200, and at a predefined distance from the benching 220. The support line 300 is attached with one end to the rodent trap 100, and at the other end to a fixating tool 400 in the upper part of the manhole 200. The fixating tool 400 may be provided with fastening means (not shown), e.g. in the shape of a clamp or cleat, to releasably fasten the support line 300 to the fixating tool 400. Given that a major part of the benching 220 of a manhole 200 is sloped, it is g DK 2019 01245 A1 almost impossible to position a trap on the benching. During even a minor flooding of the manhole, the trap will slide towards the central positioned sewer channel 230 and potentially fall into said channel 230. Therefore, the present invention provides a solution, where the trap is hung above the benching.
    However, in order to avoid that the trap will rotate in the wire, and thereby to secure that rodents will approach the trap, the inventor has provided a solution where the wall of the manhole aids in stabilizing the position of the trap.
    Figure 2 is a cross-sectional view of a manhole 200, wherein a rodent trap 100 has already been positioned into indirect contact with the wall 210 of the bottom part of the manhole 200 via a pre-mounted spacer unit 110. The spacer unit 110 provides a space between the rodent trap 100 and the wall 210 of the bottom part of the manhole 200 to provide for a better positioning of the rodent trap 100 relative to the benching 220. The spacer unit 110 is here shown as a block or a thick plate of stainless steel. Such a relatively heavy spacer unit is for keeping the rodent trap in place under flooding of the manhole. When a manhole is flooded, air may be trapped within the rodent trap, thereby giving buoyancy to said trap. Hence, a certain weight is needed to keep it in place. The spacer unit 110 therefore also functions as a counterweight 120.
    The support line 300 is attached with one end to the spacer unit/counterweight 110/120, and at the other end to a fixating tool 400 in the upper part of the manhole 200. In principle, the support line could also have been attached to the rodent trap, but in this case, the spacer unit is configured as a counterweight that is relatively heavier than the rodent trap why it may be better to avoid stress to the housing of the rodent trap by attaching the support line to the counterweight. The fixating tool 400 may be provided with fastening means (not shown), e.g. in the shape of a clamp or cleat, to releasably fasten the support line 300 to the fixating tool 400.
    Figure 3 shows a similar situation as Figure 2, but where the spacer unit/counterweight is also placed into contact with the benching 220 of the o DK 2019 01245 A1 bottom part of the manhole 200 while keeping the support effect from the wall 210 of the manhole 200. Thereby, the rodent trap 100 will remain fixed in its position relative to the manhole benching and wall, even during flooding of the manhole.
    References
    100 Rodent trap 110 Spacer unit 120 Mounting plate
    200 Manhole 210 Wall 220 Benching 300 Support line 400 Fixating tool
    权利要求:
    Claims (10)
    [1] 1. A method for positioning a rodent trap (100) in a sewage system comprising the steps of: - attaching one end of a support line (300) to a rodent trap (100); - lowering said rodent trap (100) down a manhole (200) in the sewage system by means of said support line (300) to a position above the benching (220) of the bottom part of the manhole (200), and keeping an end of said support line (300) above said manhole (200); - positioning said rodent trap (100) directly or indirectly into contact with the wall (210) of the bottom part of the manhole (200) such that said rodent trap (100) is prevented from spinning around when hanging in said support line (300); and - tightening said support line (300) and attaching the other end of said support line in the upper part of the manhole (200).
    [2] 2. A method according to claim 1, further comprising the step of pre-mounting a spacer unit (110) to the rodent trap (100); wherein said spacer unit (110) is adapted for providing a space between the rodent trap (100) and the wall (210) of the bottom part of the manhole (200); wherein the positioning step comprises positioning said rodent trap (100) indirectly into contact with the wall (210) of the bottom part of the manhole (200) by positioning said spacer unit (110) directly into contact with the wall (210) of the bottom part of the manhole (200).
    [3] 3. A method according to claim 2, wherein the spacer unit (110) is lowered to a position above the benching (220) of the bottom part of the manhole (200).
    [4] 4. A method according to claim 2, wherein the spacer unit (110) is mounted such that it extends below the rodent trap (100), and wherein step of positioning said rodent trap (100) includes positioning the spacer unit (110) into contact with the benching (220) of the bottom part of the manhole (200).
    . DK 2019 01245 A1
    [5] 5. A method according to claim 4, wherein the step of tightening the support line (300) comprises tightening said support line such that 0-99% of the total weight of the rodent trap (100) and spacer unit is carried by the support line.
    [6] 6. A method according to any one of the claims 1-5, further comprising the step of pre-mounting a counterweight to the rodent trap (100) to counteract the buoyancy of said rodent trap (100) during flooding of the manhole.
    [7] 7. A method according to any one of the claims 2-5, further comprising the step of pre-mounting a counterweight to the spacer unit (110) to counteract the buoyancy of said rodent trap (100) during flooding of the manhole.
    [8] 8. A method according to any one of the claims 2-5, wherein the counterweight is configured as a spacer unit (110) adapted for providing a space between the rodent trap (100) and the wall (210) of the bottom part of the manhole (200).
    [9] 9. A rodent trap (100) for being positioned in the the bottom part of a manhole in a sewage system, the rodent trap (100) comprising: - a housing (110) with one or more side faces, a top face, and a bottom face, and with a rodent entry opening (112) in one of said side faces or in the bottom face; - a mechanical and/or electrical killing device positioned within said housing (110); and - a mounting plate (120); wherein the housing (110) is mounted to said mounting plate (120); characterized in that the rodent trap (100) further comprises a spacer unit (110) connected to said mounting plate and extending outwardly therefrom.
    [10] 10. A rodent trap (100) according to claim 9, wherein the spacer unit (110) has a weight suitable for counteracting the buoyancy of the rodent trap (100) when submerged in water.
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    同族专利:
    公开号 | 公开日
    DK180611B1|2021-10-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-06-09| PAT| Application published|Effective date: 20210424 |
    2021-10-14| PME| Patent granted|Effective date: 20211014 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201901245A|DK180611B1|2019-10-23|2019-10-23|Method for positioning a rodent trap in a sewage system, and rodent trap for use in sewage systems|DKPA201901245A| DK180611B1|2019-10-23|2019-10-23|Method for positioning a rodent trap in a sewage system, and rodent trap for use in sewage systems|
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