CA2272198A1 - Chain guard - Google Patents
Chain guard Download PDFInfo
- Publication number
- CA2272198A1 CA2272198A1 CA 2272198 CA2272198A CA2272198A1 CA 2272198 A1 CA2272198 A1 CA 2272198A1 CA 2272198 CA2272198 CA 2272198 CA 2272198 A CA2272198 A CA 2272198A CA 2272198 A1 CA2272198 A1 CA 2272198A1
- Authority
- CA
- Canada
- Prior art keywords
- chain
- guard
- links
- chains
- mower
- 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.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P1/00—Safety devices independent of the control and operation of any machine
- F16P1/02—Fixed screens or hoods
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D75/00—Accessories for harvesters or mowers
- A01D75/20—Devices for protecting men or animals
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
A chain guard is used on a rotary mower to prevent objects from being thrown out from under the mower. The chain guard includes adjacent strands of chain forming a curtain. The adjacent strands are linked by cross links spaced along the chains to form a chain net which is more effective at trapping up thrown objects than the unlinked chains.
Description
CHAIN GUARD
FIELD OF THE INVENTION
The present invention relates to chain guards for rotary mowers.
BACKGROUND
Many manufacturers of large rotary mowers use lengths of chain as a guard for preventing objects from being thrown out from under the mower. These lengths of chain are hung individually from a rod. In order to improve the effectiveness of these chain curtains, some users have installed a strand of wire rope passing through the bottom links. This still allows the chain to slide along the cable, exposing gaps in the curtain and allowing ejection of objects from under the mower.
The present invention proposes a novel chain guard to mitigate this problem.
SUMMARY
According to the present invention there is provided a guard for a rotary cutter having a deck with at least one rotary blade under the deck, the guard comprising a plurality of guard chains depending from the deck, each chain comprising a set of chain links coupled in series, and a plurality of cross linking members coupling links of each chain to links of each adjacent chain.
The cross links hold the chains together as a band or net to trap thrown objects, while remaining flexible enough to allow material to pass under the mower.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 illustrates a mower of the type in question;
Figure 2 illustrates a prior art chain guard; and Figure 3 illustrates an embodiment of the present invention.
FIELD OF THE INVENTION
The present invention relates to chain guards for rotary mowers.
BACKGROUND
Many manufacturers of large rotary mowers use lengths of chain as a guard for preventing objects from being thrown out from under the mower. These lengths of chain are hung individually from a rod. In order to improve the effectiveness of these chain curtains, some users have installed a strand of wire rope passing through the bottom links. This still allows the chain to slide along the cable, exposing gaps in the curtain and allowing ejection of objects from under the mower.
The present invention proposes a novel chain guard to mitigate this problem.
SUMMARY
According to the present invention there is provided a guard for a rotary cutter having a deck with at least one rotary blade under the deck, the guard comprising a plurality of guard chains depending from the deck, each chain comprising a set of chain links coupled in series, and a plurality of cross linking members coupling links of each chain to links of each adjacent chain.
The cross links hold the chains together as a band or net to trap thrown objects, while remaining flexible enough to allow material to pass under the mower.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 illustrates a mower of the type in question;
Figure 2 illustrates a prior art chain guard; and Figure 3 illustrates an embodiment of the present invention.
DETAILED DESCRIPTION
Referring to the accompanying drawings, Figure 1 illustrates a mower 10.
This is a large rotary mower of the type having a deck 12 and rigid side skirts 14.
Rigid skirts can not be used at the front and back ends of the deck, since this would prevent the mower from passing over irregular ground and objects on the ground. In consequence, chain guards 16 are used along the front and back sides of the mower so as not to impede movement of the mower while retarding any objects that are thrown out by the blade of the mower.
A prior art chain guard is illustrated in Figure 2. This consists of single strands 18 of chain threaded onto a rod 20, which is in turn mounted on the deck 12 of the mower to suspend the chain. Each strand acts independently and consequently objects can be thrown out from under the mower by deflecting a single chain or by passing between two chains. A prior art attempt to solve this problem involves the use of a cable 22 threaded through the bottom links of the strands of chain. This still allows the chains to separate by sliding along the cable.
Figure 3 illustrates an embodiment of the present invention where links of adjacent strands are coupled by cross links 24. The cross links 24 are chain links that are spaced apart along the chains. In the illustrated embodiment the cross links join each pair of adjacent chains every four links. Each chain is connected to the chains on opposite sides alternately along the chains.
This chain structure produces a band or net of chain links to trap thrown objects, while still being flexible to allow material to pass beneath the guard.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention and are intended to be included herein. It is, for example possible to construct embodiments of the invention with various link spacings along the chains between the cross links or with all of the links of each chain cross linked to each adjacent chain. It is also possible to use cross links that are not themselves chain links. Any element that provides a sufficiently strong, flexible connection between the coupled chain links may be employed. The invention is therefore to be considered limited solely by the scope of the appended claims.
Referring to the accompanying drawings, Figure 1 illustrates a mower 10.
This is a large rotary mower of the type having a deck 12 and rigid side skirts 14.
Rigid skirts can not be used at the front and back ends of the deck, since this would prevent the mower from passing over irregular ground and objects on the ground. In consequence, chain guards 16 are used along the front and back sides of the mower so as not to impede movement of the mower while retarding any objects that are thrown out by the blade of the mower.
A prior art chain guard is illustrated in Figure 2. This consists of single strands 18 of chain threaded onto a rod 20, which is in turn mounted on the deck 12 of the mower to suspend the chain. Each strand acts independently and consequently objects can be thrown out from under the mower by deflecting a single chain or by passing between two chains. A prior art attempt to solve this problem involves the use of a cable 22 threaded through the bottom links of the strands of chain. This still allows the chains to separate by sliding along the cable.
Figure 3 illustrates an embodiment of the present invention where links of adjacent strands are coupled by cross links 24. The cross links 24 are chain links that are spaced apart along the chains. In the illustrated embodiment the cross links join each pair of adjacent chains every four links. Each chain is connected to the chains on opposite sides alternately along the chains.
This chain structure produces a band or net of chain links to trap thrown objects, while still being flexible to allow material to pass beneath the guard.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention and are intended to be included herein. It is, for example possible to construct embodiments of the invention with various link spacings along the chains between the cross links or with all of the links of each chain cross linked to each adjacent chain. It is also possible to use cross links that are not themselves chain links. Any element that provides a sufficiently strong, flexible connection between the coupled chain links may be employed. The invention is therefore to be considered limited solely by the scope of the appended claims.
Claims (4)
1. A guard for a rotary cutter having a deck with at least one rotary blade under the deck, the guard comprising a plurality of guard chains depending from the deck, each chain comprising a set of chain links coupled in series, and a plurality of cross linking members coupling links of each chain to links of each adjacent chain.
2. A guard according to Claim 1 wherein the cross linking members comprise chain links.
3. A guard according to Claim 1 or 2 wherein the cross linking members joining the links of two guard chains are spaced apart by one or more links of the chains.
4. A guard according to Claim 1, 2 or 3 wherein the cross linking members joining one of the guard chains to two adjacent guard chains are spaced apart by one or more links of the guard chains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2272198 CA2272198A1 (en) | 1999-05-19 | 1999-05-19 | Chain guard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2272198 CA2272198A1 (en) | 1999-05-19 | 1999-05-19 | Chain guard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2272198A1 true CA2272198A1 (en) | 2000-11-19 |
Family
ID=29589016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2272198 Abandoned CA2272198A1 (en) | 1999-05-19 | 1999-05-19 | Chain guard |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2272198A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015091050A1 (en) * | 2013-12-20 | 2015-06-25 | Khs Gmbh | Receptacle treatment machine comprising a shielding system |
| US11771005B2 (en) | 2020-10-14 | 2023-10-03 | Deere & Company | Cutter implement with curtain |
| US11785891B2 (en) | 2020-10-14 | 2023-10-17 | Deere & Company | Cutter implement having a crop pushing system |
-
1999
- 1999-05-19 CA CA 2272198 patent/CA2272198A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015091050A1 (en) * | 2013-12-20 | 2015-06-25 | Khs Gmbh | Receptacle treatment machine comprising a shielding system |
| US10040677B2 (en) | 2013-12-20 | 2018-08-07 | Khs Gmbh | Receptacle treatment machine comprising a shielding system |
| US11771005B2 (en) | 2020-10-14 | 2023-10-03 | Deere & Company | Cutter implement with curtain |
| US11785891B2 (en) | 2020-10-14 | 2023-10-17 | Deere & Company | Cutter implement having a crop pushing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |