• 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 trap for placement in the bottom part of a well in a sewage system, the trap comprising of a killing device and height adjustment means connected to the killing device, the height adjustment means enabling the killing device to follow an increasing water level in the well. The height adjustment means may comprise a floatation device provided below the killing device. A wire may be provided securing the killing device to the sewage system structure and furthermore stabilizing device(s) may be provided and adapted to stabilize horizontal and/or vertical movement of the killing device and the floatation device.
    公开号:DK201600096U1
    申请号:DK201600096U
    申请日:2016-08-31
    公开日:2017-01-13
    发明作者:Hans Knudsen
    申请人:Ratél Aps；
    IPC主号:
    专利说明:

    Rodent poison free trap
    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 an upstream or downstream sewage pipe or possibly to the sewage well. 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. Further such traps fixed in the sewage pipe are subject to an increase in corrosion of corrosive components, in particular when a trap is submerged, e.g. when a high water level occurs in a sewage system, and still further movable mechanical parts often will experience difficulties in operation due to the accumulation of sewage residue.
    Traditional traps have the disadvantage that they are difficult, if at all possible, 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.
    Often there is a desire to frequently flush the sewage system and also in such circumstances the traditional traps will have disadvantages. The flushing will in many instances remove the traps from their location and these must afterwards be considered as lost.
    These disadvantages means that an improvement in rodent traps is needed to reduce or remove the disadvantages present.
    Object of the Invention
    The objective of the present invention is to provide a poison free trap that will allow for a decreased obstruction of the sewage pipe and hence reduce the risk of clogging of the sewage system and/or the trap itself.
    Description of the Invention
    According to the invention the objective is achieved through a poison free trap for placement in the bottom part of a well in a sewage system, the poison free trap comprising of a killing device and height adjustment means enabling the killing device to follow an increasing water level in the well.
    By providing height adjustment means the killing device will be able to follow varying water level in the well and hence ensure that the killing device is not flooded, when the water is rising. Only during flooding where the entire well is flooded the killing device may be flooded as well.
    In a preferred embodiment the poison free trap comprises a killing device and a flotation device provided vertically under the killing device.
    By providing a flotation device under the killing device it is ensured that the killing device is kept above water level and hence will only to a limited degree be influenced by aggressive substances in the sewage water. Since the killing device is located above water level it is further 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 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.
    Other variants of the trap according to the invention may comprise motor driven height adjustment means, such as a winch at the well top. Such motor driven height adjustment means may be controlled by a signal from a water level measuring device.
    The construction of the invention further means that the poison free trap may be used in a number of older sewage systems where traditional traps have been impossible to install. Flushing of sewage systems may be carried out without the risk of removing or losing the traps.
    Advantageously one or more stabilizing devices are connected to the killing device. As the poison free trap is located on a flotation device the combined device is less stable than a trap fixed to the pipe structure or to the sewage well structure, and hence a further stabilising means is advantageous in order to ensure the correct orientation of the trap as well as ensuring a sufficiently stability by movements caused by animal activity.
    Advantageously the stabilizing means may include a wire securing the killing device to the sewage system structure. Preferably the killing device is suspended at a preferred depth allowing the rodent to access the killing device and at the same time keeping the killing device and flotation device free of the sewage water at normal water level.
    Advantageously one or more stabilizing device(s) are provided and being adapted to stabilize horizontal movement of the killing device. This will facilitate the rodent embanking onto the floating device and ensure that stability of this when the mass centre of the floating device, the trap and the rodent shifts during the movements of the rodent.
    Advantageously the floating device comprises an inclined upper surface extending from the killing device and downwards to the edge of the floating device. This will enable the rodent to roll of the floating platform after the rodent has been killed in the trap and eventually be washed away by the sewage system water flow.
    Preferably the floating device comprises a rigid carrier part, advantageously a steel element, moulded into a floating part. This will ensure a low centre of gravity for the floating device and further ensure that a solid construction part is present for the fastening of the killing device and/or related brackets and further for the fastening of stabilizing means as mentioned above.
    Advantageously the floating device comprises further stabilizing means for reducing tilting or rocking of the floating device. Preferably such stabilizing means comprises a board capable of supporting the floating device towards the sewage well interior surface.
    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 well 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 well. 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 SMS messages to a computer.
    Advantageously the killing device is installed at a depth, where the access to the trap is essentially corresponding to the upper side of the sewage piping. This will mean that installation depth preferably is between 10 cm and 600 cm over normal water level in the sewage system dependent on the size of the sewer pipes connected to the well.
    The invention is described in more detail in the following detailed description of a preferred embodiment, with reference to the drawing, where:
    Description of the Drawing FIG. 1 is a schematic drawing showing a poison free trap mounted in a sewage well; FIG. 2 is a schematic drawing showing a killing device and a floating device of a trap. FIG. 3 is a cross section of a flotation device; FIG. 4 is a top view of a flotation device where a stabilizing element has been mounted; FIG. 5 is a cross section of a flotation device, where the mounting of a stabilizing device is shown; and FIG. 6 is a top view where the flotation device as shown in FIG. 4 is provided in a sewage system.
    Detailed Description of the Invention FIG. 1 shows a schematic drawing of a poison free trap according to the invention mounted in a sewage system comprising sewage piping 1 and a sewage well 2. The poison free trap comprises lower part with a killing device 3 mounted in connection with a floating device 4. An upper part comprises a suspension arm 7 is shown mounted the side wall of a vertical sewage well at the top of this and further a communication device 8 is mounted in connection with the suspension arm 7. Between the suspension arm 7 and the lower part, a wire 6 is provided that suspends the lower part at a desired depth. The wire 6 is attached to the lower part essentially over the mass centre of this in order to achieve a correct positioning of the lower part. FIG. 2 and FIG. 3 show in more detail the lower part, comprising the killing device 3 and the floating device 4.
    The killing device 3 is preferably a gas driven device, where a killing piston is provided inside the trap housing and upon triggering of a trigger mechanism present in a cavity open for rodent entry will propagate into the cavity of the trigger mechanism and, with a significant force, hit the rodent that has activated the trigger mechanism. The rodent is attracted to the cavity by bait present inside the killing device. Other types of traps or killing devices may however also be used.
    The floating device 4 is preferably a moulded plastics device, e.g. moulded from polyurethane, although other materials may be suitable for the purpose. Preferably a metal part 10 is moulded into the plastics body 4, which metal part 10 serves both the purpose of lowering the mass centre of the combined device and the purpose of attachment base for additional part of the trap device. For example the killing device may be fastened to a bracket, which at one end is attached to the metal part where a part of this may extent up through the upper surface of the body 4 after moulding and serve as an attachment base for further elements, e.g. by means of a bolt or screw. The killing device 3 may then be located at a height suitable for the rodent to enter the killing device.
    The upper side of the floating device is preferably formed with an inclining surface 9, serving the purpose of discharging the rodent once this has been terminated by the killing device 3 and is falling onto the floating device surface. The surface of the floating device may further, at least on the top surface be provided with a skid resistant pattern or layer, allowing the rodent to walk on the surface without falling of the floating device.
    The top view shown in FIG. 4 shows a stabilizing element 11 provided under and fastened to the flotation device. The fastening may be effected by fastening elements 12 directly into the plastics material or the metal material 10, however in order to avoid corrosion of the metal element 10 and ensure a secure fastening, a number of fastening blocks (not shown) may be moulded into the body 4 and serve as attachment points. These blocks may further serve as distance blocks for the metal part during moulding.
    The cross section shown in FIG. 5 shows how the stabilizing element is fastened to the rigid element moulded into the flotation device. The inclining surfaces of the flotation device appear more clearly in this perspective
    The top view in FIG. 6 shows the flotation device 4 and the killing device 3 with a stabilizing element 11 when placed in a sewage well 2. The rodent may embark the flotation device from the banquets 13, which are often present.
    权利要求:
    Claims (11)
    [1] 1. A poison free trap for placement in the bottom part of a well in a sewage system, the trap comprising of a killing device and height adjustment means connected to the killing device, the height adjustment means enabling the killing device to follow an increasing water level in the well.
    [2] 2. A poison free trap according to claim 1 for placement in the bottom part of a well in a sewage system, the trap comprising of a killing device and a flotation device provided below the killing device.
    [3] 3. A poison free trap according to claim 1 or 2, where one or more stabilizing devices are connected to the killing device.
    [4] 4. A poison free trap according to claim 3, comprising a wire securing the killing device to the sewage system structure.
    [5] 5. A poison free trap according to any of the preceding claims 3 or 4, the stabilizing device(s) being adapted to stabilize horizontal movement of the killing device.
    [6] 6. A poison free trap according to any of the preceding claims, where the floating device comprises an inclined upper surface extending from the killing device and downwards to the edge of the floating device.
    [7] 7. A poison free trap according to any of the preceding claims, where the floating device comprises a rigid carrier part, e.g. a metal part, moulded into a floating part, e.g. made from polyurethane.
    [8] 8. A poison free trap according to any of the preceding claims, where the floating device comprises further stabilizing means for reducing tilting or rocking of the floating device.
    [9] 9. A poison free trap according to claim 8, where the stabilizing means comprises a board capable of supporting the floating device towards the sewage system interior surface.
    [10] 10. A poison free trap according to any of the preceding claims, where the killing device is a gas cartridge operated device.
    [11] 11. A poison free trap according to any of the preceding claims, where a signal indicating the activation of the killing device is transmitted wirelessly to a receiving device located at top of the sewage system enabling SMS communication to a computer or other devices.
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    同族专利:
    公开号 | 公开日
    DK201600096Y4|2017-02-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201570602|2015-09-22|
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