CA2020989C - Snowplow deflection system protecting snowplow vehicles and windshields - Google Patents
Snowplow deflection system protecting snowplow vehicles and windshieldsInfo
- Publication number
- CA2020989C CA2020989C CA 2020989 CA2020989A CA2020989C CA 2020989 C CA2020989 C CA 2020989C CA 2020989 CA2020989 CA 2020989 CA 2020989 A CA2020989 A CA 2020989A CA 2020989 C CA2020989 C CA 2020989C
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- Canada
- Prior art keywords
- moldboard
- snow
- top margin
- foil
- edge
- Prior art date
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- Cleaning Of Streets, Tracks, Or Beaches (AREA)
Abstract
A snow deflection system for use with vehicle propelled snowplows is designed to deflect snow which passes over the plow or moldboard away from the propelling vehicle. The top margin of the moldboard has permanently attached to it belt means which extends forwardly and downwardly to control and maintain the position of generally all of the snow in general close proximity with the moldboard. By mounting arcuate foil means in spaced apart relationship above the top margin of the moldboard and the belt means, an airflow space is defined therebetween, thereby effectively directing the flow of snow above the moldboard through the airflow space and directing it downwardly away from the snowplow vehicle.
Description
``` ~2020989 SNOWPLOW DEFLECTION SYSTEM PROTECTING SNOWPLOW VEHICLES AND
WINDSHIELDS
Background of the Invention The present invention relates to the field of snowplows, specifically, to the use of visors or foils which would reduce and control the blowing of snow up over the upper edge of the moldboard of the plow. Such snow may strike the windshield of the plow, the body of the plow vehicle, and strike or enter into the engine of the plow vehicle.
This causes obstruction of the view of the driver of the vehicle, damage to the body of the plow vehicle and impairment of the vehicle's engine performance.
In a normal snowplow, without a snow deflector system, snow may come up over the top of the snowplow and ultimately cause a vision problem for the driver; both from the snow blown in the path of his vision and the snow impacting on the windshield. Also, the snow can be drawn into the engine causing impairment of engine performance or even damage to the engine itself. Further, in areas where sand and/or salt is put on the road to help increase traction and melt ice under the snow, the sand or salt has a tendency to mix with the snow and move in a manner very similar to the snow itself. This mixture of snow, salt, and sand can cause a sandblasting effect upon the body of the vehicle thereby significantly reducing the life of 202098~
the boldy of the vehicle by removing the paint from the vehicle and exposing the bare metal surface of the vehicle to direct contact with the snow and road salt. There have been many attempts to solve this particular problem but none do so by the unique and simple, but effective, design of the instant invention.
For example U.S. Patent 2,385,996 (Phillips) discloses a sno~ flow deflector. However, unlike the instant invention Phillips shows the leading edge of its deflector to be at or~below the upper edge of the moldboard. This is completely contrary to the structure of the instant invention. Further, the design of Phillips allows its deflector to tip back, as a safety feature, when large drifts are encountered. This eliminates the effectiveness of the Phillips device in those situations. Also, the flngle iron 5 disclosed in figures 1-3 and structures 40, 1, and 41 of the alternative design disclosed in figure 6, all create choke points which will impede the flow of snow under the deflector causing a bloclcage which would render the deflector inoperative. Additionally, Phillips discloses no belt or barrier structure for partially containing the flow of snow particles as they are pushed out in front of the moldboard.
The final alternative structure disclosed in figure 7 of Phillips is completely different in structure from the instant invention.
U.S. Patent 3,432,947 (Peitl), is also structurally and conceptually different from the instant invention. Peitl does not disclose the use of the belt barrier that is hung from the top edge of the moldboard in the instant invention. Further, the concept of the instant invention is to provide a deflector which provides minimum resistance _ to the flow of snow-and air that is captured by it. The steep angle of orientation taught in Peitl provides greater resistance to air flow than the instant invention and therefore is counter to the design of the instant invention. Finally, the design of the Peitl deflector is such that it does not extend sufficiently from the moldboard to prevent it from being overpowered by snow that builds up on the moldboard when the plow is operatedat the high speeds necessary to effectively clesn modern highways. Other references include U.S.
Patent 1,900,703 (Frink), U.S. Patent 1,926,071 (Soule), U.S. Patent 2,904,904 (Krueger), and U.S. Patent 4,459,769 (Willis). None of these references disclose either the use of the barrier belt or the use of a snow deflector which allows the flow of air and snow rising over the top edge of the moldboard to be deflected behind the back side of the moldboard and underneath the snowplow vehicle.
15 ~he main objective of the instant invention is to capture flnd control snow thst rises over the top edge of the moldboard of the snowplow.
It is a further objective of the instant invention that, once the air and sno~ is captured, there must be no resistance to the flow of snow or air as it is deflected behind the moldboard and underneath the snow plow vehicle.
It is an advantage of the instant invention to sllow plowing at high speed, this leaves the road in better, cleaner condition.
It is a further advantsge of the instant invention that the airflow directed behind the moldboflrd and under the vehicle prevents any snow or other particulate matter that may pass under the moldboard from being blown toward the vehicle. This is because the airflow from the foil at the top of the moldboard blows the particles coming from under the plow, down and away from the body of the vehicle and the engine of the vehicle.
Summary Of The Invention The instant invention is to be built into or attached to a snowplow for the purpose of capturing and controlling the snow coming over the top ofa snowplow vehicle's moldboard. This system works on virtually any snowplow. An arcuate foil is located above the moldboard at a pre-selected distance according to the size and shape of the plow.
A belt is attached to the top margin of the moldboard. The front edge of the deflector is projected forward and above the top edge of the moldboard and preferflbly, although not necessarily, in back of the vertical plane of the bottom edge of the belt to capture the snow as it passes up in front of the moldboard. The foil re-directs the snow and air from an upward direction to a downward direction as the snow and air is passing over the moldboard.
Also, the instant invention prevents, or reduces the amount of, dust, snow and other debris that is normally present between the front end of the snowplow vehicle and the back side of the moldboard from being blown into the plow vehicle. In a conventional snowplow reduced ~ pressure is created at the back side of the moldboard as the plow vehicle moves along a road. This causes suction. The greater the speed the greater the suction. This suction normally causes debris immediately behind the moldboard to be lifted off the ground and blown into the vehicle. The instant invention, by providing a downward ~low of air between the moldboard and the vehicle, prevents this from happening.
Many variables affect the amount of snow that is blown over the top of the moldboard: The speed at which the vehicle is being driven, the water content of the snow, the depth of the snow, and the size and shape of the moldboard. These variables can work together to overpower even the most advanced known snow deflecting system.
However, the instant invention, by means of a unique and simple design, combines the use of the above described foil with a belt or other barrier mesns hung from the top of the moldboard. The belt knocks down the snow that is pushed up the moldboard thereby keeping the cloud of snow particles lower to the ground and in a closer relationship to the moldboard than other prior art systems. This limits the distance, out in front of the moldboard, where the airborne particles of snow are in fact traveling. This allows the foil, which has one edge well out in front of the top margin of the moldboard, to easily capture and control the snow particles. As air combines with snow and other particulate matter in front of the moldboard it travels in a generally upward direction and the front edge of the 25 foil catches the mixture and, with minimal interference, directs it back and down toward the ground behind the moldboard and underneath - ` 2020989 the snowplow vehicle. The lack of resistance to this operation is insured by tilting the foil slightly downward in the front and bringing the foil out over the top edge of the moldboard just enough to force the snow under the vehicle. This results in either no snow or a significantly reduced amount of snow obstructing the vision of the plow vehicle driver, improves the efficiency and safety of operation of the snowplow, and lengthens the life of the snowplow vehicle.
Both the belt and the foil, in the described relationship, are needed to conform to the invention and achieve the desired result.
lC These and other benefits of the instant invention will be apparent to one skilled in the art from the following description.
Description of the Drawings Figure 1 is a perspective view of an alternative structure for the invention disclosed herein.
Figure 2 is a side elev~tional view of an alternative structure for the invention described herein.
Figure 3 is a side elevational view of the invention disclosed herein.
Figure 4 is a rear elevational view of the moldboard and the snow deflector.
_ - ` 2020989 Detailed Description Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
The instant invention is a snow deflector system 100 comprising an arcuate foil 10 and a belt 11. Please see figure 3. The system is attached to the moldboard 30 of a snowplow vehicle 60. The moldboard 30 comprises a generally arcuate shaped body having a top edge 31, a bottom edge 3i, a back side 33, and a front side 34. The back side33 is generally convex and the front side 34 is generally concave. The moldboard 30 may also have a pair of skids 40 which prevent the 15 bottom edge 32 from scraping or cutting into the road bed when the plow is in use. Please see figure 4.
The structure of the instant invention may be made adjustable in many various ways that will be apparent to those skilled in the srt.
In the preferred form of the invention the foil 10 is attached to the baclc side 33 of the moldboard 30 by struts 50 and bolts 51. The belt 11 is attached to the top edge 31 of the moldboard 30 by bolts 52. Figure 3. Many other attachment means will, of course, be apparent to those skilled it the art. For example, the belt 11 could - 20`20989 be attached to the ribs 54 of the moldboard 30. Further, as the figures show, a safety cable 80 is attached to the foil 10 to keep it with the moldboard 30 in the unlikely event it should break free from its mounting. This prevents the foil 10 from being blown into the plow vehicle 60; e.g. in an accident.
The struts 50 are attached to both the moldboard 30 and the foil 10 by the bolts 51. The struts 50 are positioned so that the front edge 12 of the foil 10 extends out beyond and above the top edge 31 of the moldboard 30. Figure 3.
Further the position of struts 50 is designed to prevent the development of choke points. Figures 1 and 4. The back edge 13 of the foil 10, relative to the ground and relative to moldboard 30, is located at a level that is slightly above the level or at the same level as the front edge 12. However, the downward arc of the back edge 13 is sufficient to create a downward flow of snow which passes over the top edge 31 of the moldboard 30, while at the same time allowing the foil 10 to present minimal resistance to the airflow 70. Figures 2 and 3. This allows the snow to be easily deflected away from the plow vehicle 60 by providing an airflow path 70 that offers minimal resistance. In other words the system of the instant invention provides a path of least resistance for the snow particles down and away from the plow.
The belt 11 is attached to the top edge 31 of the moldboard - 8a -30 by the bolts 52. The belt 11 knocks down any snow that builds up near the top edge 31 of the moldboard 30. This keeps the snow closer to the front side 34 of the moldboard 30; even at high speeds. Without the belt 11 snow particles can build up to the point, where they are ~r ` 2020989 -sufficiently out in front of the front edge 12 of the foil 10, that they can flow over the top of the foil 10, thereby rendering the foil 10 useless. The belt 11 keeps the snow particles sufficiently close to the front side 34 of the moldboard 30 so that the snow 5 particles cannot build up to the point where they can blow over the top of the foil 10.
In its preferred form the belt 11 is made out of approximately 3/8 inch thick belting material; usually rubber. Ideally the belt 11 covers about 25% of the distance between the top edge 31 and the bottom edge 32 of the moldboard 30. This is an ideal width, but other widths may be used which do not interfere with snow entering or being scooped into the moldboard 30 and which keep the rising snow close to the moldboard 30.
The foil 10 and the belt 11 work in conjunction as follows- As the plow vehicle ~G travels down a road, snow begins to build up on the front side 34 of the moldboard 30. The belt 11 knocks this snow down, keeping it close to the surface of the moldboard 30; even at high plowing speeds. This keeps the light particulate snow dust sufficiently close to the front side 34 of the moldboard 30 so that it cannot get out in front of the front edge 12 of the foil 10. The front edge 12 of the foil 10 extends out in front of and above the top edge 31 of the moldboard 30 but, preferably, does not extend out in front of the bottom edge 16 of the belt 11. The snow dust that escapes and is blown over the top edge 31 of the moldboard 30 is pushed, by the airflow 70 created as the plow vehicle 60 moves down the rofld, into the spflce 20 thflt is between the top edge 31 of the moldboard 30 and the front edge 12 of the foil 10. Figure 2.
The bflck edge 13 of the foil 10 then redirects the snow dust down, toward the ground, and away from the plow vehicle 60.
Referring now to figures 1 and 2 an alternative embodiment of the instant invention may be seen. The only difference between the structure of the fllternative embodiment and that of the instant invention is that the belt 11 is made integral with the structure of the moldboard 30. This further improves the efficiency of the invention.
Also, as figure 2 shows, when the structure of the belt 11 is made integral with the structure of the moldboard 30 then one structure with the same function flS the previously described combination of moldboard 30 and belt 11 exists. This is true even though the integral belt 11 is usually substantially more rigid than the separate belt 11. Figures 1 and 2.
The word "belt'lherein refers either to fl belt fldded to the upper edge ofa moldboard, or to one integral with the upper edgeofthe moldboard.
The word "snow" as it hfls been used in this description and in the following claims means, in addition to its comrnon meflning~ fl mixture of snow flir flnd other mfltter; e.g. sfllt or sand.
The above described embodiments of this invention are merely descriptive of its principles and are not to be limiting. The scope of this invention instead shall be determined from the scope of the following claims, including their equivalents. I
WINDSHIELDS
Background of the Invention The present invention relates to the field of snowplows, specifically, to the use of visors or foils which would reduce and control the blowing of snow up over the upper edge of the moldboard of the plow. Such snow may strike the windshield of the plow, the body of the plow vehicle, and strike or enter into the engine of the plow vehicle.
This causes obstruction of the view of the driver of the vehicle, damage to the body of the plow vehicle and impairment of the vehicle's engine performance.
In a normal snowplow, without a snow deflector system, snow may come up over the top of the snowplow and ultimately cause a vision problem for the driver; both from the snow blown in the path of his vision and the snow impacting on the windshield. Also, the snow can be drawn into the engine causing impairment of engine performance or even damage to the engine itself. Further, in areas where sand and/or salt is put on the road to help increase traction and melt ice under the snow, the sand or salt has a tendency to mix with the snow and move in a manner very similar to the snow itself. This mixture of snow, salt, and sand can cause a sandblasting effect upon the body of the vehicle thereby significantly reducing the life of 202098~
the boldy of the vehicle by removing the paint from the vehicle and exposing the bare metal surface of the vehicle to direct contact with the snow and road salt. There have been many attempts to solve this particular problem but none do so by the unique and simple, but effective, design of the instant invention.
For example U.S. Patent 2,385,996 (Phillips) discloses a sno~ flow deflector. However, unlike the instant invention Phillips shows the leading edge of its deflector to be at or~below the upper edge of the moldboard. This is completely contrary to the structure of the instant invention. Further, the design of Phillips allows its deflector to tip back, as a safety feature, when large drifts are encountered. This eliminates the effectiveness of the Phillips device in those situations. Also, the flngle iron 5 disclosed in figures 1-3 and structures 40, 1, and 41 of the alternative design disclosed in figure 6, all create choke points which will impede the flow of snow under the deflector causing a bloclcage which would render the deflector inoperative. Additionally, Phillips discloses no belt or barrier structure for partially containing the flow of snow particles as they are pushed out in front of the moldboard.
The final alternative structure disclosed in figure 7 of Phillips is completely different in structure from the instant invention.
U.S. Patent 3,432,947 (Peitl), is also structurally and conceptually different from the instant invention. Peitl does not disclose the use of the belt barrier that is hung from the top edge of the moldboard in the instant invention. Further, the concept of the instant invention is to provide a deflector which provides minimum resistance _ to the flow of snow-and air that is captured by it. The steep angle of orientation taught in Peitl provides greater resistance to air flow than the instant invention and therefore is counter to the design of the instant invention. Finally, the design of the Peitl deflector is such that it does not extend sufficiently from the moldboard to prevent it from being overpowered by snow that builds up on the moldboard when the plow is operatedat the high speeds necessary to effectively clesn modern highways. Other references include U.S.
Patent 1,900,703 (Frink), U.S. Patent 1,926,071 (Soule), U.S. Patent 2,904,904 (Krueger), and U.S. Patent 4,459,769 (Willis). None of these references disclose either the use of the barrier belt or the use of a snow deflector which allows the flow of air and snow rising over the top edge of the moldboard to be deflected behind the back side of the moldboard and underneath the snowplow vehicle.
15 ~he main objective of the instant invention is to capture flnd control snow thst rises over the top edge of the moldboard of the snowplow.
It is a further objective of the instant invention that, once the air and sno~ is captured, there must be no resistance to the flow of snow or air as it is deflected behind the moldboard and underneath the snow plow vehicle.
It is an advantage of the instant invention to sllow plowing at high speed, this leaves the road in better, cleaner condition.
It is a further advantsge of the instant invention that the airflow directed behind the moldboflrd and under the vehicle prevents any snow or other particulate matter that may pass under the moldboard from being blown toward the vehicle. This is because the airflow from the foil at the top of the moldboard blows the particles coming from under the plow, down and away from the body of the vehicle and the engine of the vehicle.
Summary Of The Invention The instant invention is to be built into or attached to a snowplow for the purpose of capturing and controlling the snow coming over the top ofa snowplow vehicle's moldboard. This system works on virtually any snowplow. An arcuate foil is located above the moldboard at a pre-selected distance according to the size and shape of the plow.
A belt is attached to the top margin of the moldboard. The front edge of the deflector is projected forward and above the top edge of the moldboard and preferflbly, although not necessarily, in back of the vertical plane of the bottom edge of the belt to capture the snow as it passes up in front of the moldboard. The foil re-directs the snow and air from an upward direction to a downward direction as the snow and air is passing over the moldboard.
Also, the instant invention prevents, or reduces the amount of, dust, snow and other debris that is normally present between the front end of the snowplow vehicle and the back side of the moldboard from being blown into the plow vehicle. In a conventional snowplow reduced ~ pressure is created at the back side of the moldboard as the plow vehicle moves along a road. This causes suction. The greater the speed the greater the suction. This suction normally causes debris immediately behind the moldboard to be lifted off the ground and blown into the vehicle. The instant invention, by providing a downward ~low of air between the moldboard and the vehicle, prevents this from happening.
Many variables affect the amount of snow that is blown over the top of the moldboard: The speed at which the vehicle is being driven, the water content of the snow, the depth of the snow, and the size and shape of the moldboard. These variables can work together to overpower even the most advanced known snow deflecting system.
However, the instant invention, by means of a unique and simple design, combines the use of the above described foil with a belt or other barrier mesns hung from the top of the moldboard. The belt knocks down the snow that is pushed up the moldboard thereby keeping the cloud of snow particles lower to the ground and in a closer relationship to the moldboard than other prior art systems. This limits the distance, out in front of the moldboard, where the airborne particles of snow are in fact traveling. This allows the foil, which has one edge well out in front of the top margin of the moldboard, to easily capture and control the snow particles. As air combines with snow and other particulate matter in front of the moldboard it travels in a generally upward direction and the front edge of the 25 foil catches the mixture and, with minimal interference, directs it back and down toward the ground behind the moldboard and underneath - ` 2020989 the snowplow vehicle. The lack of resistance to this operation is insured by tilting the foil slightly downward in the front and bringing the foil out over the top edge of the moldboard just enough to force the snow under the vehicle. This results in either no snow or a significantly reduced amount of snow obstructing the vision of the plow vehicle driver, improves the efficiency and safety of operation of the snowplow, and lengthens the life of the snowplow vehicle.
Both the belt and the foil, in the described relationship, are needed to conform to the invention and achieve the desired result.
lC These and other benefits of the instant invention will be apparent to one skilled in the art from the following description.
Description of the Drawings Figure 1 is a perspective view of an alternative structure for the invention disclosed herein.
Figure 2 is a side elev~tional view of an alternative structure for the invention described herein.
Figure 3 is a side elevational view of the invention disclosed herein.
Figure 4 is a rear elevational view of the moldboard and the snow deflector.
_ - ` 2020989 Detailed Description Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.
The instant invention is a snow deflector system 100 comprising an arcuate foil 10 and a belt 11. Please see figure 3. The system is attached to the moldboard 30 of a snowplow vehicle 60. The moldboard 30 comprises a generally arcuate shaped body having a top edge 31, a bottom edge 3i, a back side 33, and a front side 34. The back side33 is generally convex and the front side 34 is generally concave. The moldboard 30 may also have a pair of skids 40 which prevent the 15 bottom edge 32 from scraping or cutting into the road bed when the plow is in use. Please see figure 4.
The structure of the instant invention may be made adjustable in many various ways that will be apparent to those skilled in the srt.
In the preferred form of the invention the foil 10 is attached to the baclc side 33 of the moldboard 30 by struts 50 and bolts 51. The belt 11 is attached to the top edge 31 of the moldboard 30 by bolts 52. Figure 3. Many other attachment means will, of course, be apparent to those skilled it the art. For example, the belt 11 could - 20`20989 be attached to the ribs 54 of the moldboard 30. Further, as the figures show, a safety cable 80 is attached to the foil 10 to keep it with the moldboard 30 in the unlikely event it should break free from its mounting. This prevents the foil 10 from being blown into the plow vehicle 60; e.g. in an accident.
The struts 50 are attached to both the moldboard 30 and the foil 10 by the bolts 51. The struts 50 are positioned so that the front edge 12 of the foil 10 extends out beyond and above the top edge 31 of the moldboard 30. Figure 3.
Further the position of struts 50 is designed to prevent the development of choke points. Figures 1 and 4. The back edge 13 of the foil 10, relative to the ground and relative to moldboard 30, is located at a level that is slightly above the level or at the same level as the front edge 12. However, the downward arc of the back edge 13 is sufficient to create a downward flow of snow which passes over the top edge 31 of the moldboard 30, while at the same time allowing the foil 10 to present minimal resistance to the airflow 70. Figures 2 and 3. This allows the snow to be easily deflected away from the plow vehicle 60 by providing an airflow path 70 that offers minimal resistance. In other words the system of the instant invention provides a path of least resistance for the snow particles down and away from the plow.
The belt 11 is attached to the top edge 31 of the moldboard - 8a -30 by the bolts 52. The belt 11 knocks down any snow that builds up near the top edge 31 of the moldboard 30. This keeps the snow closer to the front side 34 of the moldboard 30; even at high speeds. Without the belt 11 snow particles can build up to the point, where they are ~r ` 2020989 -sufficiently out in front of the front edge 12 of the foil 10, that they can flow over the top of the foil 10, thereby rendering the foil 10 useless. The belt 11 keeps the snow particles sufficiently close to the front side 34 of the moldboard 30 so that the snow 5 particles cannot build up to the point where they can blow over the top of the foil 10.
In its preferred form the belt 11 is made out of approximately 3/8 inch thick belting material; usually rubber. Ideally the belt 11 covers about 25% of the distance between the top edge 31 and the bottom edge 32 of the moldboard 30. This is an ideal width, but other widths may be used which do not interfere with snow entering or being scooped into the moldboard 30 and which keep the rising snow close to the moldboard 30.
The foil 10 and the belt 11 work in conjunction as follows- As the plow vehicle ~G travels down a road, snow begins to build up on the front side 34 of the moldboard 30. The belt 11 knocks this snow down, keeping it close to the surface of the moldboard 30; even at high plowing speeds. This keeps the light particulate snow dust sufficiently close to the front side 34 of the moldboard 30 so that it cannot get out in front of the front edge 12 of the foil 10. The front edge 12 of the foil 10 extends out in front of and above the top edge 31 of the moldboard 30 but, preferably, does not extend out in front of the bottom edge 16 of the belt 11. The snow dust that escapes and is blown over the top edge 31 of the moldboard 30 is pushed, by the airflow 70 created as the plow vehicle 60 moves down the rofld, into the spflce 20 thflt is between the top edge 31 of the moldboard 30 and the front edge 12 of the foil 10. Figure 2.
The bflck edge 13 of the foil 10 then redirects the snow dust down, toward the ground, and away from the plow vehicle 60.
Referring now to figures 1 and 2 an alternative embodiment of the instant invention may be seen. The only difference between the structure of the fllternative embodiment and that of the instant invention is that the belt 11 is made integral with the structure of the moldboard 30. This further improves the efficiency of the invention.
Also, as figure 2 shows, when the structure of the belt 11 is made integral with the structure of the moldboard 30 then one structure with the same function flS the previously described combination of moldboard 30 and belt 11 exists. This is true even though the integral belt 11 is usually substantially more rigid than the separate belt 11. Figures 1 and 2.
The word "belt'lherein refers either to fl belt fldded to the upper edge ofa moldboard, or to one integral with the upper edgeofthe moldboard.
The word "snow" as it hfls been used in this description and in the following claims means, in addition to its comrnon meflning~ fl mixture of snow flir flnd other mfltter; e.g. sfllt or sand.
The above described embodiments of this invention are merely descriptive of its principles and are not to be limiting. The scope of this invention instead shall be determined from the scope of the following claims, including their equivalents. I
Claims (5)
1. On a snowplow vehicle for plowing snow having a moldboard with a top margin the combination comprising:
arcuate foil means mounted above the top margin of said moldboard for controlling generally all of the flow of said snow above said moldboard;
belt means permanently attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of generally all of said snow in generally close proximity with said moldboard;
said arcuate foil means being spaced apart from the top margin of said moldboard and said belt means a preselected distance so as to define an airflow space therebetween;
whereby said belt means keeps said snow close enough to said moldboard to allow said foil means to effectively direct said snow downwardly away from said snowplow vehicle.
arcuate foil means mounted above the top margin of said moldboard for controlling generally all of the flow of said snow above said moldboard;
belt means permanently attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of generally all of said snow in generally close proximity with said moldboard;
said arcuate foil means being spaced apart from the top margin of said moldboard and said belt means a preselected distance so as to define an airflow space therebetween;
whereby said belt means keeps said snow close enough to said moldboard to allow said foil means to effectively direct said snow downwardly away from said snowplow vehicle.
2. On a snowplow vehicle for plowing snow having a generally arcuate moldboard with a top margin the combination comprising:
a generally arcuate foil for controlling the flow of said snow over said moldboard; belt means permanently attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of generally all of said snow in generally close proximity with said moldboard;
said arcuate foil being mounted above said moldboard and said belt means and having a front edge and a back edge parallel to each other and parallel to the ground so that the front edge is the same distance from the ground as the back edge;
said arcuate foil and said top margin of said moldboard being spaced apart at a preselected distance so as to define an airflow space therebetween;
said belt means also having a top edge attached to said top margin of said moldboard.
a generally arcuate foil for controlling the flow of said snow over said moldboard; belt means permanently attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of generally all of said snow in generally close proximity with said moldboard;
said arcuate foil being mounted above said moldboard and said belt means and having a front edge and a back edge parallel to each other and parallel to the ground so that the front edge is the same distance from the ground as the back edge;
said arcuate foil and said top margin of said moldboard being spaced apart at a preselected distance so as to define an airflow space therebetween;
said belt means also having a top edge attached to said top margin of said moldboard.
3. The combination of claim 2 in which said arcuate foil has a front edge and a back edge:
said front edge and said back edge being located in the same plane;
said plane being above said moldboard and generally parallel to the ground.
said front edge and said back edge being located in the same plane;
said plane being above said moldboard and generally parallel to the ground.
4. The combination of claim 3 wherein:
said belt means has a bottom edge;
said front edge of said arcuate foil being located above said top edge of said belt means.
said belt means has a bottom edge;
said front edge of said arcuate foil being located above said top edge of said belt means.
5. On a snowplow vehicle for plowing snow on the ground, having a moldboard with a top margin, the combination comprising:
arcuate foil means attached to and mounted above the top margin of said moldboard for controlling the flow of said snow above said moldboard;
belt means attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of said snow in substantially close proximity with said moldboard;
said arcuate foil means being spaced apart from said top margin of said moldboard and said belt means and having a front edge and a back edge parallel to each other and parallel to the ground so that the front edge is the same distance from the ground as the back edge;
said back edge of said arcuate foil being positioned behind the top margin of said moldboard.
arcuate foil means attached to and mounted above the top margin of said moldboard for controlling the flow of said snow above said moldboard;
belt means attached to said top margin of said moldboard and extending downwardly from said moldboard for controlling and maintaining the position of said snow in substantially close proximity with said moldboard;
said arcuate foil means being spaced apart from said top margin of said moldboard and said belt means and having a front edge and a back edge parallel to each other and parallel to the ground so that the front edge is the same distance from the ground as the back edge;
said back edge of said arcuate foil being positioned behind the top margin of said moldboard.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US51491290A | 1990-04-16 | 1990-04-16 | |
| US514,912 | 1990-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2020989A1 CA2020989A1 (en) | 1991-10-17 |
| CA2020989C true CA2020989C (en) | 1997-07-15 |
Family
ID=24049193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2020989 Expired - Fee Related CA2020989C (en) | 1990-04-16 | 1990-07-12 | Snowplow deflection system protecting snowplow vehicles and windshields |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2020989C (en) |
-
1990
- 1990-07-12 CA CA 2020989 patent/CA2020989C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2020989A1 (en) | 1991-10-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |