• 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 the rodent trap down a manhole in the sewage system by means of the support line, and keeping an end of the support line above the manhole; c) positioning the rodent trap in contact with the benching of the bottom part of the manhole; and d) tightening the support line, thereby providing a substantially vertical upwards force on the rodent trap, and attaching the other end of the support line in the upper part of the manhole.
    公开号:DK201800182A1
    申请号:DKP201800182
    申请日:2018-04-24
    公开日:2019-10-29
    发明作者:Brun Knudsen Hans
    申请人:Ratél Aps；
    IPC主号:
    专利说明:

    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 increase in flow resistance will significantly reduce the sewage system basic function.
    DK 2018 00182 A1
    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 catching or killing rodents in a sewage system, the method comprises the steps of:
    - attaching one end of a support line to a rodent trap;
    - lowering the rodent trap down a manhole in the sewage system by means of the support line, and keeping an end of the support line above the manhole;
    - positioning the rodent trap in contact with the benching of the bottom part of the manhole; and
    - tightening the support line, thereby providing a substantially vertical upwards force on the rodent trap, and attaching the other end of the support line in the upper part of the manhole.
    By positioning the rodent trap in contact with the benching 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 will, as the free flow diameter is
    DK 2018 00182 A1 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.
    The supporting line has two purposes. It is used as means for lowering the rodent trap into contact with the benching of the bottom part of the manhole. Thereby, no personnel need to enter the manhole during the installation. Furthermore, the supporting line is used to retain the rodent trap at a desired position. This is necessary, as a major part of the benching is sloped. The supporting line may e.g. be a rope or a wire.
    In one or more embodiments, the method further comprises the step of mounting means adapted for preventing rats from entering the manhole through its outlet. Such means may e.g. be a device as disclosed in EP1828498, hereby incorporated by reference. The device comprises a jacket, a first gate plate, and a locking device. The jacket is adapted for mounting in a manhole pipe outlet, and the first gate plate is pivotally arranged inside the jacket. The locking device is arranged in connection to the first gate plate, where furthermore a second gate plate is pivotally arranged at a distance from the first gate plate, inside the jacket and in communication with the first gate plate by means of a connection assembly. The jacket may have a shape substantially corresponding to the inner shape of the manhole pipe outlet and has an extend covering more than half of the circumference of said manhole pipe outlet. This method step secures that only the rats in a specific area, upstream to the manhole, has access to the manhole and rodent trap. In one or more embodiments, the method further comprises the step of mounting means adapted for preventing rats from entering the manhole through one or more of its inlets.
    In one or more embodiments, the step of tightening the support line is performed such that a part of the weight of the rodent trap is carried by the support line. In one or more embodiments, the step of tightening the support line is performed such that only a part of the weight of the rodent trap is carried by the support
    DK 2018 00182 A1 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. In one or more embodiments, the rodent trap comprises a counterweight plate extending below its housing. It is then the counterweight plate that is positioned in contact with the benching of the bottom part of the manhole. In one or more embodiments, the rodent trap, e.g. the housing, may comprise one or more counterweights to counteract the buoyancy of said rodent trap during flooding of the manhole. In one or more embodiments, the step of tightening the support line is performed such that 590% of the weight of the rodent trap is carried by the support line, such as 1085%, e.g. 15-80%, such as 20-75%, e.g. 25-70%, such as 30-65%, e.g. 35-50%, such as 40-45%.
    In one or more embodiments, the rodent trap comprises:
    - a housing with a channel with a rodent entry opening, and a first opening in the upper wall leading to a chamber with defining walls and positioned above said channel; and
    - a mechanical and/or electrical killing device positioned within the chamber; wherein the housing is mounted to a counterweight plate extending below said housing;
    wherein the counterweight plate is positioned into contact with the benching of the bottom part of the manhole.
    In one or more embodiments, the chamber is with air tight defining walls, and wherein the chamber is sized and configured to hold an air pocket of a size suitable to withstand water reaching the killing means of the mechanical and/or electrical killing device when the rodent trap is positioned at least 4 meters below the water level of a body of water, such as within the range of 4-6 meters, e.g. at least 5 meters below the water level of a body of water, such as within the range of 5-7 meters, e.g. at least 6 meters below the water level of a body of water,
    DK 2018 00182 A1 such as within the range of 6-8 meters, e.g. at least 7 meters below the water level of a body of water, such as within the range of 7-9 meters.
    In one or more embodiments, the housing is mounted to the counterweight plate such that the channel will incline at an angle of within 5-40 degrees relative to the counterweight plate. This angle range is important, as a killed rodent, such as a rat, is thereby able to fall out of the channel, and will be washed away with the flowing sewage water. In one or more embodiments, the channel will incline at an angle of within 5-40 degrees relative to the counterweight plate, such as within 10-35 degrees, e.g. within 15-30 degrees, such as within 20-25 degrees.
    A second aspect relates to a rodent trap for being positioned in contact with the benching of the bottom part of a manhole in a sewage system, the rodent trap comprising:
    - a housing with a channel with a rodent entry opening, and a first opening in the upper wall leading to a chamber with defining walls and positioned above said channel; and
    - a mechanical and/or electrical killing device positioned within the chamber; wherein the housing is mounted to a counterweight plate extending below said housing.
    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, as manhole as other non-electrical devices, has the advantage of being usable in APEX 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
    DK 2018 00182 A1 avoided. The communication device eventually has a radio module enabling the device to send SMS messages to a computer.
    In one or more embodiments, a window is positioned in a closed end of the channel, which makes the channel appear as an open-ended channel. This configuration allows the rat to see through the tunnel to the other side of the trap, whereby it will not hesitate to enter the trap.
    In one or more embodiments, a pressure sensor is positioned within the chamber. A signal indicating the pressure within the chamber 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 SMS communication to a computer or other devices.
    A third aspect relates to a method for catching rodents in a sewage system comprising the steps of:
    - releasably attaching a rodent trap to an elongate positioning pole;
    - attaching one end of a support line to said rodent trap;
    - lowering the rodent trap down a manhole in the sewage system by means of the positioning pole, and keeping an end of the support line above the manhole;
    - positioning the rodent trap on the benching of the bottom part of the manhole;
    - attaching the other end of the support line in the upper part of the manhole; and
    - releasing the positioning pole from the rodent trap, and withdrawing the positioning pole from the manhole.
    A fourth aspect relates to a rodent trap for being positioned in contact with the benching of the bottom part of a manhole in a sewage system, the rodent trap comprising:
    - a housing with a channel with a rodent entry opening, and a first opening in the upper wall leading to a chamber with defining walls and positioned above said channel;
    DK 2018 00182 A1
    - a mechanical and/or electrical killing device positioned within the chamber; and
    - one or more counterweights to counteract the buoyancy of said rodent trap during flooding of the manhole.
    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 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 perspective view of a rodent trap in accordance with various embodiments of the invention;
    Figure 3 is a cross-sectional view of a rodent trap in accordance with various embodiments of the invention;
    DK 2018 00182 A1
    Figure 4 is a perspective view of a housing of a rodent trap in accordance with various embodiments of the invention; and
    Figure 5 is a perspective view of a counterweight plate of a rodent trap 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 benching 210 of the bottom part of the manhole 200. The support line 300 is attached with one end to the rodent trap 100, e.g. via a coupling unit 500 as shown in Figure 4, and at the other end to a fixating tool 400 in the upper part of the manhole 200. The mounting and fixating tool 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. The coupling unit 500 may comprise a spring, such as a helical spring, such that by tightening the support line 300 and fastening it to the fixating tool 400, the spring in the coupling unit 500 will ensure that the rodent trap 100 is always subjected to a substantially vertical pull.
    Figure 2 is a perspective view of a rodent trap 100, where the housing 110 is mounted to a counterweight plate 120 extending below said housing 110. Figure 3 is a cross-sectional view of the rodent trap shown in Figure 2. The housing 110 is mounted to the counterweight plate 120 such that the channel 111 will incline at an angle of about 30 degrees relative to the counterweight plate 120. The channel 111 has a rodent entry opening 112, and an opening in the upper wall leading to a chamber 114 with defining walls and positioned above said channel
    111. A mechanical killing device 115 is positioned within the chamber 114. The killing device 115 is a gas driven device, where a killing piston is provided inside a housing. Upon triggering of a trigger mechanism within the channel 111, the killing piston will propagate into the channel 111 with a significant force and hit the rodent that has activated the trigger mechanism. The rodent is attracted to
    DK 2018 00182 A1 the channel 111 by bait present behind the trigger mechanism. Other types of traps or killing devices may however also be used.
    Figure 5 is a perspective view of an exemplary counterweight plate 120 of a rodent trap in accordance with various embodiments of the invention. The counterweight plate 120 is here shown with a vertically extending mounting plate 122 adapted for receiving the front of the housing. A cut-out or slot 124 is shown in the mounting plate 122 to provide access to the rodent entry opening 112 of the housing 110, when the housing 110 is mounted thereto.
    权利要求:
    Claims (9)
    [1] Claims
    1. A method for catching or killing rodents in a sewage system comprising the steps of:
    - attaching one end of a support line to a rodent trap;
    - lowering the rodent trap (100) down a manhole (200) in the sewage system by means of the support line (300), and keeping an end of the support line (300) above the manhole;
    - positioning the rodent trap (100) in contact with the benching (210) of the bottom part of the manhole (200); and
    - tightening the support line (300), thereby providing a substantially vertical upwards force on the rodent trap (100), and attaching the other end of the support line in the upper part of the manhole (200).
    [2] 2. A method according to claim 1, further comprising the step of mounting means adapted for preventing rats from entering the manhole (200) through its outlet.
    [3] 3. A method according to any one of the claims 1 -2, wherein the step of tightening the support line is performed such that a part of the weight of the rodent trap (100) is carried by the support line (300).
    [4] 4. A method according to any one of the claims 1 -3, wherein the rodent trap (100) comprises:
    - a housing (110) with a channel (111) with a rodent entry opening (112), and a first opening in the upper wall leading to a chamber (114) with defining walls and positioned above said channel (111); and
    - a mechanical and/or electrical killing device (115) positioned within the chamber (114); wherein the housing (110) is mounted to a counterweight plate (120) extending below said housing (110);
    wherein the counterweight plate (120) is positioned in contact with the benching (210) of the bottom part of the manhole (200).
    DK 2018 00182 A1
    [5] 5. A method according to claim 4, wherein the housing (110) is mounted to the counterweight plate (120) such that the channel (111) will incline at an angle of within 5-45 degrees relative to the counterweight plate (120).
    [6] 6. A method according to any one of the claims 1 -5, wherein the rodent trap (100) is connected to one or more counterweights to counteract the buoyancy of said rodent trap (100) during flooding of the manhole.
    [7] 7. A rodent trap (100) for being positioned in contact with the benching of the bottom part of a manhole in a sewage system, the rodent trap comprising:
    - a housing (110) with a channel (111) with a rodent entry opening (112), and a first opening in the upper wall leading to a chamber (114) with defining walls and positioned above said channel (111); and
    - a mechanical and/or electrical killing device (115) positioned within the chamber (114); wherein the housing (110) is mounted to a counterweight plate (120) extending below said housing (110).
    [8] 8. A rodent trap (100) according to claim 6, wherein the housing (110) is mounted to the counterweight plate (120) such that the channel (111) will incline at an angle of within 5-45 degrees relative to the counterweight plate (120).
    [9] 9. A rodent trap (100) according to any one of the claims 7-8, further comprising one or more counterweights adapted to counteract the buoyancy of said rodent trap.
    类似技术:
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    同族专利:
    公开号 | 公开日
    EP3784035A1|2021-03-03|
    WO2019206627A1|2019-10-31|
    DK179956B1|2019-10-29|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20080168720A1|2004-11-18|2008-07-17|Christian Thiim|Rodent Entry Prevention Device|
    BR112013033789A2|2011-06-29|2016-10-04|Ratèl Aps|plague electrocution device and method, and method for mounting a plague electrocution device|
    EP2685015B1|2012-07-13|2019-11-06|Ratèl APS|Method of installing equipment in the mouth of a side branch pipe|
    WO2017172337A1|2016-03-31|2017-10-05|Frog Creek Partners, LLC|Removable catch basin filter insert and lifting apparatus|
    DK179386B1|2016-09-14|2018-05-28|Ratel Aps|Corrosion and clogging resistant poison free rat trap|
    法律状态:
    2019-10-29| PAT| Application published|Effective date: 20191025 |
    2019-10-29| PME| Patent granted|Effective date: 20191029 |
    2020-03-20| PPF| Opposition filed|Opponent name: DK:JENSEN, LASSE Effective date: 20200320 |
    2020-12-21| PDU| Decision on opposition: patent maintained as unamended|Effective date: 20201118 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201800182A|DK179956B1|2018-04-24|2018-04-24|A method for positioning a rodent trap in a sewage system, and a rodent trap for use in a sewage system|DKPA201800182A| DK179956B1|2018-04-24|2018-04-24|A method for positioning a rodent trap in a sewage system, and a rodent trap for use in a sewage system|
    EP19718104.3A| EP3784035A1|2018-04-24|2019-04-10|Rodent trap for use in sewage systems|
    PCT/EP2019/059020| WO2019206627A1|2018-04-24|2019-04-10|Rodent trap for use in sewage systems|
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