CA1298998C - Rat guard net - Google Patents
Rat guard netInfo
- Publication number
- CA1298998C CA1298998C CA000515411A CA515411A CA1298998C CA 1298998 C CA1298998 C CA 1298998C CA 000515411 A CA000515411 A CA 000515411A CA 515411 A CA515411 A CA 515411A CA 1298998 C CA1298998 C CA 1298998C
- Authority
- CA
- Canada
- Prior art keywords
- net
- links
- rat
- rat guard
- rats
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Catching Or Destruction (AREA)
Abstract
ABSTRACT
A rat guard net is formed by links of rigid material freely movable relative to one another in such a manner as to give rise to a structure flexible in three dimensions, despite the rigidity of the material of the links. It can be draped completely over an object to be protected such as farm machinery or a heap of farm produce so as to provide protection from rat damage.
A rat guard net is formed by links of rigid material freely movable relative to one another in such a manner as to give rise to a structure flexible in three dimensions, despite the rigidity of the material of the links. It can be draped completely over an object to be protected such as farm machinery or a heap of farm produce so as to provide protection from rat damage.
Description
lZ98998 RAT GUARD NET
BACKGROUND OF THE INVENTION:
This invention relates to a rat guard net for protecting objects, such as farm machines and implements and harvested farm produce, from harm by rats.
Farm machines and implements such as rice reapers and threshers are used for brief limited periods. They are often kept in barns, for example, while they are not in service.
During long idle periods, the remnants of harvested produce in farm implements may entice rats into invading their interiors and building nests therein. These rats gnaw drive belts and electric wires used in the implements, and their excrement defiles the implements and accelerates their corrosion. Rats also help themselves freely to harvested farm produce kept in storage.
To prevent such rat damage, various measures are taken such as the extirpation of rats with rodenticides and covering farm machinery and harvester farm produce with fabric sheets.
The use of a rodenticide is, however, relatively ineffectual where rats can find a rich supply of farm produce to feed upon as an alternative to baits containing the rodenticide. In the presence of farm produce remaining ~. ~
in farm implements, or of farm produce kept in storage, it is thus extremely difficult to control rats satisfactorily by the use of a rodenticide. The concealment of farm implements or harvested farm products with fabric sheets is ineffectual because the rats are greedy enough to take the trouble to eat holes in the sheets and thus reach the produce. Rigid wire netting may be used to cover a protected article such as a farm implement to protect it from harm by rats, but such a net lacks flexibility and it is difficult to completely cover an article to be protected without leaving any gap which allows the rats to enter.
This invention aims to provide improved protection of farm machines and implements and harvested farm produce from harm by rats. The method of the invention for protecting objects from rats comprises draping a net over an object to be protected, the net being formed by links of a rigid material freely linked into one another so as to be relatively movable, opening defined by the net being small enough to prevent entry of the head of a rat. Such a net provides a three-dimensionally flexible network in spite of the rigidity of the material of the individual links. Since the rat guard net is formed by links which are freely movable relative to one another and is thus three-dimensionally flexible, it can be easily draped over a given farm implement or a given heap of farm produce without leaving behind any gap large enough to admit rats. Since the component links of this rat guard net are individually movable and made of a rigid material, they are not liable to be gnawed by rats.
The method, therefore, perm~ts better protection of farm implements and harvested farm produce from rats. The invention extends to rat guard nets used to implement the method.
Other features of the invention will become apparent from the following description of the invention with 1~98998 reference to the accompanying drawings, in which:
Fig. 1 is a perspective view illustrating part of a rat guard net formed of circular links and elongated links;
Figs. 2(a) through Fig. 2(c) are perspective views respectively of a circular link, an e~lipsoid link, and a link having separate loops at opposite ends thereof;
Fig. 3 is an explanatory diagram illustrating the rat guard net of Fig. 1 in actual use;
Fig. 4 is a perspective view illustrating part of a rat guard net formed of rhombic links and ellipsoid links;
and Fig. 5 is a perspective view illustrating part of a rat guard net formed solely of rhombic links.
A rat guard net as illustrated in Fig. 1 is formed by fitting ellipsoid links 2, 2, ... severally into circular links 1, 1, ... spaced regularly in longitudinal and lateral directions thereby interconnecting the individual circular links 1, 1, ... with the elliptic links 2, 2, ... in both the longitudinal and lateral directions. The generally rectangular meshes enclosed within rings formed by the circular links 1, 1, ... and the elliptic links 2, 2, ...
each have an opening small enough to prevent entry of the head of a rat.
The aforementioned circular links 1, 1, ... and ellipsoid links 2, 2, ... are made of a material too rigid to be readily gnawed by rats. Generally, a metal is used as the rigid material. Optionally, a rigid synthetic resin such as a polycarbonate or a ceramic substance may be used so as to decrease the weight of the net. Aluminum and aluminum alloys such as duralumin are preferred metals for forming the links. A rat guard net made of aluminum or an aluminum alloy features light weight and ease of handling.
~98998 Since the circular links 1, 1, ... and the ellipsoid links 2, 2, ... are fitted into one another with ample play, they are free for relative movement. This freedom of motion means that the rat guard net as a whole is three-dimensionally flexible notwithstanding the rigidity of thematerial from which the circular links 1, 1, ... and the elliptic links 2, 2, ... are made.
Union of the circular links 1, 1, ... and the elliptic links 2, 2, ... can be obtained by preparing either or both of the two groups of links so as to contain an opening 3 as illustrated in Fig. 2(a) and Fig. 2(b), interlinking the links using the openings 3, and thereafter closing these openings 3. When links 2' which, as illustrated in Fig. 2(c), possess loops at opposite ends are used in place of the elliptic links 2, they offer the advantage that the openings 3, once closed after meshing of the links, will not readily open under exertion of any external force.
The rat guard net is draped in use over an article 4 to be protected such as, for example, a farm implement or a heap of harvested farm produce as illustrated in Fig. 3.
Since the rat guard net is freely bendable in a three-dimensional pattern as already described, it can be draped easily over the contour of the protected article 4 without leaving behind any gap large enough to admit rats. Further, the possibility of rats finding their way to the protected article 4 under the bottom edge of the draped rat guard net can be precluded by allowing the bottom edge of the net to lie on the ground. To ensure more complete protection, weights 5 such as stones may be placed on the skirt of the net lying flat on the ground so as to hold down the skirt.
The size of the rat guard net should be proportionate to the size of the article 4 to be protected. If the net is too large, it is inconvenient to transport and store. When the article 4 happens to be a large farm machine, it is desirable to cover it with a plurality of rat guard nets each of a unit size of l m in width and 5 m in length, for example. When a plurality of rat guard nets are used in the manner just described, adjacent nets may be tied to each other with wire or devices such as carabiners.
Fig. 4 illustrates another exemplary form of rat guard net. This rat guard net is formed by regularly and parallelly spaced rows each formed of rhombic links 6, 6, ...
freely movable relative to one another, and parallel ellipsoid links 2, 2, ...extending between and freely movable relative to the adjacent rows of rhombic links 6, 6, ...
thereby interconnecting the latter to one another in a two-dimensional pattern.
Fig. 5 illustrates yet another exemplary rat guard net. This rat guard net is formed of rhombic links 6, 6, ...
freely movably relative to one another in the longitudinal and lateral directions in a two-dimensional mesh.
The links used in producing rat guard nets for use in this invention are not limited to the circular, ellipsoid, and rhombic shapes described above with reference to the drawings, but may be formed in oval, triangular and other polygonal shapes.
BACKGROUND OF THE INVENTION:
This invention relates to a rat guard net for protecting objects, such as farm machines and implements and harvested farm produce, from harm by rats.
Farm machines and implements such as rice reapers and threshers are used for brief limited periods. They are often kept in barns, for example, while they are not in service.
During long idle periods, the remnants of harvested produce in farm implements may entice rats into invading their interiors and building nests therein. These rats gnaw drive belts and electric wires used in the implements, and their excrement defiles the implements and accelerates their corrosion. Rats also help themselves freely to harvested farm produce kept in storage.
To prevent such rat damage, various measures are taken such as the extirpation of rats with rodenticides and covering farm machinery and harvester farm produce with fabric sheets.
The use of a rodenticide is, however, relatively ineffectual where rats can find a rich supply of farm produce to feed upon as an alternative to baits containing the rodenticide. In the presence of farm produce remaining ~. ~
in farm implements, or of farm produce kept in storage, it is thus extremely difficult to control rats satisfactorily by the use of a rodenticide. The concealment of farm implements or harvested farm products with fabric sheets is ineffectual because the rats are greedy enough to take the trouble to eat holes in the sheets and thus reach the produce. Rigid wire netting may be used to cover a protected article such as a farm implement to protect it from harm by rats, but such a net lacks flexibility and it is difficult to completely cover an article to be protected without leaving any gap which allows the rats to enter.
This invention aims to provide improved protection of farm machines and implements and harvested farm produce from harm by rats. The method of the invention for protecting objects from rats comprises draping a net over an object to be protected, the net being formed by links of a rigid material freely linked into one another so as to be relatively movable, opening defined by the net being small enough to prevent entry of the head of a rat. Such a net provides a three-dimensionally flexible network in spite of the rigidity of the material of the individual links. Since the rat guard net is formed by links which are freely movable relative to one another and is thus three-dimensionally flexible, it can be easily draped over a given farm implement or a given heap of farm produce without leaving behind any gap large enough to admit rats. Since the component links of this rat guard net are individually movable and made of a rigid material, they are not liable to be gnawed by rats.
The method, therefore, perm~ts better protection of farm implements and harvested farm produce from rats. The invention extends to rat guard nets used to implement the method.
Other features of the invention will become apparent from the following description of the invention with 1~98998 reference to the accompanying drawings, in which:
Fig. 1 is a perspective view illustrating part of a rat guard net formed of circular links and elongated links;
Figs. 2(a) through Fig. 2(c) are perspective views respectively of a circular link, an e~lipsoid link, and a link having separate loops at opposite ends thereof;
Fig. 3 is an explanatory diagram illustrating the rat guard net of Fig. 1 in actual use;
Fig. 4 is a perspective view illustrating part of a rat guard net formed of rhombic links and ellipsoid links;
and Fig. 5 is a perspective view illustrating part of a rat guard net formed solely of rhombic links.
A rat guard net as illustrated in Fig. 1 is formed by fitting ellipsoid links 2, 2, ... severally into circular links 1, 1, ... spaced regularly in longitudinal and lateral directions thereby interconnecting the individual circular links 1, 1, ... with the elliptic links 2, 2, ... in both the longitudinal and lateral directions. The generally rectangular meshes enclosed within rings formed by the circular links 1, 1, ... and the elliptic links 2, 2, ...
each have an opening small enough to prevent entry of the head of a rat.
The aforementioned circular links 1, 1, ... and ellipsoid links 2, 2, ... are made of a material too rigid to be readily gnawed by rats. Generally, a metal is used as the rigid material. Optionally, a rigid synthetic resin such as a polycarbonate or a ceramic substance may be used so as to decrease the weight of the net. Aluminum and aluminum alloys such as duralumin are preferred metals for forming the links. A rat guard net made of aluminum or an aluminum alloy features light weight and ease of handling.
~98998 Since the circular links 1, 1, ... and the ellipsoid links 2, 2, ... are fitted into one another with ample play, they are free for relative movement. This freedom of motion means that the rat guard net as a whole is three-dimensionally flexible notwithstanding the rigidity of thematerial from which the circular links 1, 1, ... and the elliptic links 2, 2, ... are made.
Union of the circular links 1, 1, ... and the elliptic links 2, 2, ... can be obtained by preparing either or both of the two groups of links so as to contain an opening 3 as illustrated in Fig. 2(a) and Fig. 2(b), interlinking the links using the openings 3, and thereafter closing these openings 3. When links 2' which, as illustrated in Fig. 2(c), possess loops at opposite ends are used in place of the elliptic links 2, they offer the advantage that the openings 3, once closed after meshing of the links, will not readily open under exertion of any external force.
The rat guard net is draped in use over an article 4 to be protected such as, for example, a farm implement or a heap of harvested farm produce as illustrated in Fig. 3.
Since the rat guard net is freely bendable in a three-dimensional pattern as already described, it can be draped easily over the contour of the protected article 4 without leaving behind any gap large enough to admit rats. Further, the possibility of rats finding their way to the protected article 4 under the bottom edge of the draped rat guard net can be precluded by allowing the bottom edge of the net to lie on the ground. To ensure more complete protection, weights 5 such as stones may be placed on the skirt of the net lying flat on the ground so as to hold down the skirt.
The size of the rat guard net should be proportionate to the size of the article 4 to be protected. If the net is too large, it is inconvenient to transport and store. When the article 4 happens to be a large farm machine, it is desirable to cover it with a plurality of rat guard nets each of a unit size of l m in width and 5 m in length, for example. When a plurality of rat guard nets are used in the manner just described, adjacent nets may be tied to each other with wire or devices such as carabiners.
Fig. 4 illustrates another exemplary form of rat guard net. This rat guard net is formed by regularly and parallelly spaced rows each formed of rhombic links 6, 6, ...
freely movable relative to one another, and parallel ellipsoid links 2, 2, ...extending between and freely movable relative to the adjacent rows of rhombic links 6, 6, ...
thereby interconnecting the latter to one another in a two-dimensional pattern.
Fig. 5 illustrates yet another exemplary rat guard net. This rat guard net is formed of rhombic links 6, 6, ...
freely movably relative to one another in the longitudinal and lateral directions in a two-dimensional mesh.
The links used in producing rat guard nets for use in this invention are not limited to the circular, ellipsoid, and rhombic shapes described above with reference to the drawings, but may be formed in oval, triangular and other polygonal shapes.
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS :
1. A rat guard net when used in the performance of a method of protecting objects from rats comprising placing a net over an object to be protected so that the net drapes freely over the object, the net being formed by plural independent links of a rigid material freely linked into one another so as to be relatively moveable within the draped net, openings defined by the net being small enough to prevent entry of the head of a rat.
2. A rat guard net according to claim 1, wherein the elongated links are ellipsoid links.
3. A rat guard net when used in the performance of a method of protecting objects from rats comprising placing a net over an object to be protected so that the net drapes freely over the object, the net being formed by plural independent links of a rigid material freely linked into one another so as to be relatively moveable within the draped net, openings defined by the net being small enough to prevent entry of the head of a rat.
4. A rat guard net when used in the performance of the method of protecting objects from rats comprising placing a net over an object to be protected so that the net drapes freely over the object, the net being formed by plural independent links of a rigid material freely linked into one another so as to be relatively moveable within the draped net, openings defined by the net being small enough to prevent entry of the head of a rat.
5. A plurality of rat guard nets as claimed in any one of claims 1, 2, 3 or 4, when used together for draping an object to be protected.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP173326/1985 | 1985-08-08 | ||
| JP17332685A JPS6236134A (en) | 1985-08-08 | 1985-08-08 | Mouse control net |
| JP32027/1986 | 1986-02-18 | ||
| JP3202786A JPS6322131A (en) | 1986-02-18 | 1986-02-18 | Rat control net |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1298998C true CA1298998C (en) | 1992-04-21 |
Family
ID=26370546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000515411A Expired - Fee Related CA1298998C (en) | 1985-08-08 | 1986-08-06 | Rat guard net |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU596111B2 (en) |
| CA (1) | CA1298998C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009094769A1 (en) * | 2008-01-30 | 2009-08-06 | Gilles Saindon | Toroidal cloth |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06153756A (en) * | 1992-11-17 | 1994-06-03 | Okanishi:Kk | Rodent-proofing method |
-
1986
- 1986-08-06 CA CA000515411A patent/CA1298998C/en not_active Expired - Fee Related
- 1986-08-07 AU AU60957/86A patent/AU596111B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009094769A1 (en) * | 2008-01-30 | 2009-08-06 | Gilles Saindon | Toroidal cloth |
Also Published As
| Publication number | Publication date |
|---|---|
| AU596111B2 (en) | 1990-04-26 |
| AU6095786A (en) | 1987-02-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |