US20060107555A1 - Universal snow plow adapter - Google Patents
Universal snow plow adapter Download PDFInfo
- Publication number
- US20060107555A1 US20060107555A1 US10/984,586 US98458604A US2006107555A1 US 20060107555 A1 US20060107555 A1 US 20060107555A1 US 98458604 A US98458604 A US 98458604A US 2006107555 A1 US2006107555 A1 US 2006107555A1
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- United States
- Prior art keywords
- blade
- moldboard
- snow plow
- pivotally
- lift assembly
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
- E01H5/06—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades
- E01H5/063—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material dislodging essentially by non-driven elements, e.g. scraper blades, snow-plough blades, scoop blades by snow-plough blades tiltable for shock-absorbing purposes
Definitions
- Snow plows are commonly used in conjunction with general purpose vehicles, such as trucks, to clear roads, driveways and other paths. However, these roads and paths are not always flat and free of obstacles. Because of the possibility of a plow encountering an immovable object, such as a curb, precautions are typically incorporated into the plow system. There are two common implementations used to protect the snow plow system from such obstacles.
- the “trip edge” is typically hinged at the lower edge of the plow blade. This edge is typically about nine inches tall and is hinged so as to allow it to move backward when encountering an immovable object.
- the trip edge is held in position through the use of biasing elements, such as springs. In operation, the springs hold the trip edge in place as the plow blade is used.
- biasing elements such as springs.
- the springs hold the trip edge in place as the plow blade is used.
- a second such implementation allows the entire plow blade, or moldboard, to pivot when it encounters an immovable object.
- the entire moldboard is hinged to the accompanying frame and lift system, thereby allowing it to pivot about a horizontal axis.
- each of these configurations has its perceived advantages and disadvantages. Similarly, each configuration has strong advocates among those who buy snow plows. Because both versions are popular with consumers, and neither is clearly preferred over the other, many manufacturers and dealers design, manufacture and sell both types of systems.
- a bracket is interposed between a lift assembly, which is adapted to attach directly to a trip edge blade, and a full moldboard trip blade.
- This bracket is pivotally attached to the lift assembly, so as to allow it to pivot about a vertical axis. It is also pivotally attached to the full moldboard trip blade so as to allow the blade to pivot about a horizontal axis. This allows a single lift assembly to be used in conjunction with both trip edge blades and full moldboard trip blades.
- FIG. 1 is a perspective drawing of a lift assembly for a full moldboard trip blade of the prior art
- FIG. 2 is a side view of a full moldboard trip blade showing the tilting operation of the blade
- FIG. 3 is a perspective drawing of a lift assembly, as it is attached to a trip edge blade;
- FIG. 4 is a perspective drawing of the lift assembly of FIG. 3 , as attached to a full moldboard trip blade in accordance with the present invention.
- FIG. 5 is a perspective drawing of the preferred embodiment of the present invention.
- FIG. 1 shows a lift assembly 10 for use with a full moldboard trip blade (not shown).
- the snow plow blade pivotally attaches to points 20 a , 20 b , 20 c and 20 d on arm 95 . These points 20 provide a hinge about which the plow blade can pivot.
- biasing elements preferably springs 80 , are used to exert force on the top edge of the plow blade.
- FIG. 2 shows the tilting operation of the full moldboard trip blade.
- One or more biasing elements 80 is used to hold the top of the blade 200 in the operative position.
- the blade pivots at point 20 .
- the force exerted at the bottom of the blade must exceed that exerted by the biasing element(s) at the top edge of the blade. If the force is greater, the blade will pivot about point 20 .
- the biasing elements are stretched, thereby increasing the backward force that they are exerting on the top edge of the blade 200 .
- the biasing elements force the blade 200 back to its operative position.
- FIG. 1 also shows two actuators 70 a , 70 b , such as hydraulic cylinders, which are used to pivot arm 95 about a pivot point 90 .
- actuators 70 a , 70 b such as hydraulic cylinders, which are used to pivot arm 95 about a pivot point 90 .
- the arm 95 pivots in a counterclockwise direction about pivot point 90 .
- Arm 95 is also in communication with arc 89 and bracket 88 , to which the biasing elements 80 are affixed. Therefore, arm 95 , arc 89 , bracket 88 , biasing elements 80 and the plow blade move in unison in response to relative movement of actuators 70 a , 70 b . This integral motion is imperative to the operation of a full moldboard trip blade.
- lift assemblies for full moldboard trip blades are well known to those skilled in the art, and are widely used. While these other implementations can differ in various respects, there are several common characteristics among them.
- the biasing elements 80 moves in unison with the movement of the blade in order to operate properly when the blade is turned.
- the cylinders 70 do not attach directly to the blade, because of the need for the blade to freely pivot about a horizontal axis.
- the pivot point 90 about which the blade vertically rotates typically is not integral with the blade, because of the need for the blade to freely pivot about a horizontal axis.
- FIG. 3 shows a perspective drawing of a trip edge snow plow blade 300 , mated with a lift assembly 310 .
- the trip edge 301 is pivotally attached to blade 300 at attachment points 302 .
- Force from biasing elements 303 a , 303 b , 303 c , and 303 d holds the trip edge 301 in its operative position.
- an external force or immovable object exerts pressure against the front side of trip edge 301
- the trip edge rotates about the horizontal axis defined by attachment points 302 . This rotation forces rod 304 to move in an upward direction, thereby causing biasing elements 303 to expand.
- Blade 300 is not required to pivot about any horizontal axes, since the trip edge 301 is able to perform this rotation in the presence of excessive force or immovable objects, such as curbs. Consequently, lift assembly 310 is pivotally attached directly to blade 300 at vertical pivot location 311 .
- Two actuators 315 such as hydraulic cylinders (only one shown) are used to cause the rotation of the blade about the vertical axis defined by vertical pivot location 311 .
- These actuators are also pivotally coupled directly to the blade 300 at attachment points 312 (only one shown). These points 312 are situated such that one is located to the left of the pivot location 311 and the other is located to the right of the pivot location 311 .
- the attachment points 312 are preferably equally spaced from the pivot location 311 .
- lift assemblies for trip edge blades are well known to those skilled in the art, and are widely used. While these other implementations can differ in various respects, there are several common characteristics among them.
- the biasing elements 303 are located on the blade 300 .
- the cylinders 315 attach directly to the blade, since the blade 300 is unable to pivot about a horizontal axis.
- the pivot point 311 about which the blade vertically rotates typically is integral with the blade, because of there is no need for the blade to freely pivot about a horizontal axis.
- the differences enumerated above have led snow plow manufacturers to develop separate lift assemblies for each type of blade.
- the need for two lift assemblies is detrimental to manufacturers and dealers, who must forecast the demand of not only snow plow systems, but the percentage of each type.
- more dissimilar parts need to be manufactured and inventoried because of this duality.
- the present invention significantly reduces the number of different components required to implement both full moldboard trip blades and trip edge blades by using a common lift assembly for both systems.
- the lift assembly of the present invention is that which is used in the trip edge system of FIG. 3 , although other lift assemblies are also possible.
- FIG. 4 demonstrates the use of the lift assembly of FIG. 3 in conjunction with a full moldboard trip blade.
- Lift assembly 310 is pivotally coupled to bracket 410 at vertical pivot location 311 , preferably through the use of a bolt or other suitable fastener.
- Actuators 315 such as hydraulic cylinders (only one is shown) are similarly pivotally coupled to bracket 410 at attachment points 412 (only one is shown) in a similar manner.
- Bracket 410 is thereby able to pivot about the vertical pivot location 311 in response to relative movement of the actuators 315 .
- Bracket 410 is also unable to rotate in the horizontal axis due to its coupling to lift assembly 310 .
- Full moldboard trip blade 420 is pivotally attached to bracket 410 at attachment points 413 (only one is shown), preferably by use of a bolt, pin or other suitable fastener. This attachment allows blade 420 to rotate about the horizontal axis defined by attachment points 413 .
- one or more biasing elements 425 are coupled to blade 420 on end 426 , and are coupled to attachment points 414 (only two are shown) on bracket 410 . As before, tension from these biasing elements 425 maintains the blade 420 in its operative position.
- the attachment points on bracket 410 are used to create two axes about which there is rotation.
- the attachment at vertical pivot location 311 allows the bracket to rotate about a vertical axis defined by that point.
- the attachment points 413 allow the blade 420 to rotate about a horizontal axis defined by these attachment points.
- bracket 410 it is therefore possible to employ the same lift assembly 310 for both trip edge blades and full moldboard trip blades. This allows manufacturer and dealers to manufacture and stock a single lift assembly, suitable for use with both systems.
- lift assembly While a specific lift assembly is illustrated in the figures, the invention is not limited to only that assembly.
- the present invention is suited for any lift assembly which comprises a vertical pivot location and two actuators used to rotate the blade about that pivot location.
- FIG. 5 illustrates the preferred embodiment of the bracket 410 .
- the bracket 410 comprises an upper, arcuate bar 500 and a lower elongated bar 510 .
- These bars preferably tubular members constructed of steel, are affixed to each other at or near both ends, preferably by welding.
- the bars are also connected via one or preferably more support bars 520 , which extend downwardly from the upper bar 500 to the lower bar 510 and are affixed to the upper and lower bars, preferably by welding.
- Vertical pivot point 311 is preferably located in the center of the upper and lower bar, such that the bracket is symmetrical about the vertical pivot location 311 .
Abstract
Description
- Snow plows are commonly used in conjunction with general purpose vehicles, such as trucks, to clear roads, driveways and other paths. However, these roads and paths are not always flat and free of obstacles. Because of the possibility of a plow encountering an immovable object, such as a curb, precautions are typically incorporated into the plow system. There are two common implementations used to protect the snow plow system from such obstacles.
- One such implementation incorporates a “trip edge” into the snow blade. In this embodiment, the “trip edge” is typically hinged at the lower edge of the plow blade. This edge is typically about nine inches tall and is hinged so as to allow it to move backward when encountering an immovable object. Typically, the trip edge is held in position through the use of biasing elements, such as springs. In operation, the springs hold the trip edge in place as the plow blade is used. When an immovable object, such as a curb, is encountered, the force created by the trip edge against the immovable object will exceed the force exerted by the springs, thereby allowing the trip edge to pivot away from the object. Once the object has been passed, the force of the springs again returns the trip edge to its operative position.
- A second such implementation allows the entire plow blade, or moldboard, to pivot when it encounters an immovable object. In this embodiment, the entire moldboard is hinged to the accompanying frame and lift system, thereby allowing it to pivot about a horizontal axis.
- Each of these configurations has its perceived advantages and disadvantages. Similarly, each configuration has strong advocates among those who buy snow plows. Because both versions are popular with consumers, and neither is clearly preferred over the other, many manufacturers and dealers design, manufacture and sell both types of systems.
- While this allows consumers the opportunity to choose between the two implementations, there are serious disadvantages to the dealers and manufacturers. Manufacturers are forced to develop two separate snow blades and two separate lift assemblies. Similarly, dealers are forced to order and stock both types of systems, as well as spare parts for each.
- Therefore, it would be advantageous to develop an apparatus and a method whereby the number of different components used in these two implementations is minimized. This would reduce design and manufacturing costs from the manufacturers and would reduce inventory and carrying costs for the dealers.
- The problems of the prior art are overcome by the present invention which provides an apparatus and method allowing the use of a common lift assembly with both trip edge blades and full moldboard trip blades. A bracket is interposed between a lift assembly, which is adapted to attach directly to a trip edge blade, and a full moldboard trip blade. This bracket is pivotally attached to the lift assembly, so as to allow it to pivot about a vertical axis. It is also pivotally attached to the full moldboard trip blade so as to allow the blade to pivot about a horizontal axis. This allows a single lift assembly to be used in conjunction with both trip edge blades and full moldboard trip blades.
-
FIG. 1 is a perspective drawing of a lift assembly for a full moldboard trip blade of the prior art; -
FIG. 2 is a side view of a full moldboard trip blade showing the tilting operation of the blade; -
FIG. 3 is a perspective drawing of a lift assembly, as it is attached to a trip edge blade; -
FIG. 4 is a perspective drawing of the lift assembly ofFIG. 3 , as attached to a full moldboard trip blade in accordance with the present invention; and -
FIG. 5 is a perspective drawing of the preferred embodiment of the present invention. -
FIG. 1 shows alift assembly 10 for use with a full moldboard trip blade (not shown). The snow plow blade pivotally attaches topoints arm 95. Thesepoints 20 provide a hinge about which the plow blade can pivot. To maintain the snow plow blade in its operative position, biasing elements, preferably springs 80, are used to exert force on the top edge of the plow blade. -
FIG. 2 shows the tilting operation of the full moldboard trip blade. One ormore biasing elements 80 is used to hold the top of theblade 200 in the operative position. When a strong force, or immovable object exerts pressure on the bottom edge of the blade, the blade pivots atpoint 20. In order to start pivoting, the force exerted at the bottom of the blade must exceed that exerted by the biasing element(s) at the top edge of the blade. If the force is greater, the blade will pivot aboutpoint 20. As it pivots, the biasing elements are stretched, thereby increasing the backward force that they are exerting on the top edge of theblade 200. When the force (or object) is no longer present, the biasing elements force theblade 200 back to its operative position. -
FIG. 1 also shows twoactuators arm 95 about apivot point 90. When theright actuator 70 a is expanded and theleft actuator 70 b is contracted, thearm 95 pivots in a counterclockwise direction aboutpivot point 90.Arm 95 is also in communication witharc 89 andbracket 88, to which thebiasing elements 80 are affixed. Therefore,arm 95,arc 89,bracket 88,biasing elements 80 and the plow blade move in unison in response to relative movement ofactuators - Other implementations of lift assemblies for full moldboard trip blades are well known to those skilled in the art, and are widely used. While these other implementations can differ in various respects, there are several common characteristics among them. First, the
biasing elements 80 moves in unison with the movement of the blade in order to operate properly when the blade is turned. Second, the cylinders 70 do not attach directly to the blade, because of the need for the blade to freely pivot about a horizontal axis. Third, thepivot point 90 about which the blade vertically rotates typically is not integral with the blade, because of the need for the blade to freely pivot about a horizontal axis. -
FIG. 3 shows a perspective drawing of a trip edgesnow plow blade 300, mated with alift assembly 310. Thetrip edge 301 is pivotally attached toblade 300 atattachment points 302. Force from biasingelements trip edge 301 in its operative position. When an external force or immovable object exerts pressure against the front side oftrip edge 301, the trip edge rotates about the horizontal axis defined byattachment points 302. This rotation forcesrod 304 to move in an upward direction, thereby causing biasing elements 303 to expand. This expansion creates a downward force onrod 304, such that thetrip edge 301 returns to its operative position as soon as the immovable object is no longer present, or the external force is less than the force exerted by the biasing elements 303. Although four biasing elements are shown, those skilled in the art will appreciate that fewer or more could be used without departing from the scope of the present invention. -
Blade 300 is not required to pivot about any horizontal axes, since thetrip edge 301 is able to perform this rotation in the presence of excessive force or immovable objects, such as curbs. Consequently,lift assembly 310 is pivotally attached directly toblade 300 atvertical pivot location 311. Twoactuators 315 such as hydraulic cylinders (only one shown) are used to cause the rotation of the blade about the vertical axis defined byvertical pivot location 311. These actuators are also pivotally coupled directly to theblade 300 at attachment points 312 (only one shown). Thesepoints 312 are situated such that one is located to the left of thepivot location 311 and the other is located to the right of thepivot location 311. The attachment points 312 are preferably equally spaced from thepivot location 311. - Other implementations of lift assemblies for trip edge blades are well known to those skilled in the art, and are widely used. While these other implementations can differ in various respects, there are several common characteristics among them. First, the biasing elements 303 are located on the
blade 300. Second, thecylinders 315 attach directly to the blade, since theblade 300 is unable to pivot about a horizontal axis. Third, thepivot point 311 about which the blade vertically rotates typically is integral with the blade, because of there is no need for the blade to freely pivot about a horizontal axis. - The differences enumerated above have led snow plow manufacturers to develop separate lift assemblies for each type of blade. The need for two lift assemblies is detrimental to manufacturers and dealers, who must forecast the demand of not only snow plow systems, but the percentage of each type. Similarly, more dissimilar parts need to be manufactured and inventoried because of this duality. Finally, there are more spare parts and replacement parts because of this situation. The present invention significantly reduces the number of different components required to implement both full moldboard trip blades and trip edge blades by using a common lift assembly for both systems. The lift assembly of the present invention is that which is used in the trip edge system of
FIG. 3 , although other lift assemblies are also possible. -
FIG. 4 demonstrates the use of the lift assembly ofFIG. 3 in conjunction with a full moldboard trip blade.Lift assembly 310 is pivotally coupled tobracket 410 atvertical pivot location 311, preferably through the use of a bolt or other suitable fastener.Actuators 315, such as hydraulic cylinders (only one is shown) are similarly pivotally coupled tobracket 410 at attachment points 412 (only one is shown) in a similar manner.Bracket 410 is thereby able to pivot about thevertical pivot location 311 in response to relative movement of theactuators 315.Bracket 410 is also unable to rotate in the horizontal axis due to its coupling to liftassembly 310. Fullmoldboard trip blade 420 is pivotally attached tobracket 410 at attachment points 413 (only one is shown), preferably by use of a bolt, pin or other suitable fastener. This attachment allowsblade 420 to rotate about the horizontal axis defined by attachment points 413. Finally, one ormore biasing elements 425 are coupled toblade 420 onend 426, and are coupled to attachment points 414 (only two are shown) onbracket 410. As before, tension from these biasingelements 425 maintains theblade 420 in its operative position. - Thus, the attachment points on
bracket 410 are used to create two axes about which there is rotation. The attachment atvertical pivot location 311 allows the bracket to rotate about a vertical axis defined by that point. Similarly, the attachment points 413 allow theblade 420 to rotate about a horizontal axis defined by these attachment points. - Through the addition of
bracket 410, it is therefore possible to employ thesame lift assembly 310 for both trip edge blades and full moldboard trip blades. This allows manufacturer and dealers to manufacture and stock a single lift assembly, suitable for use with both systems. - While a specific lift assembly is illustrated in the figures, the invention is not limited to only that assembly. The present invention is suited for any lift assembly which comprises a vertical pivot location and two actuators used to rotate the blade about that pivot location.
-
FIG. 5 illustrates the preferred embodiment of thebracket 410. In the preferred embodiment, thebracket 410 comprises an upper,arcuate bar 500 and a lowerelongated bar 510. These bars, preferably tubular members constructed of steel, are affixed to each other at or near both ends, preferably by welding. The bars are also connected via one or preferably more support bars 520, which extend downwardly from theupper bar 500 to thelower bar 510 and are affixed to the upper and lower bars, preferably by welding.Vertical pivot point 311 is preferably located in the center of the upper and lower bar, such that the bracket is symmetrical about thevertical pivot location 311. Attachment points 412, which are preferably holes into which bolts, pins or other fasteners are inserted, are formed inright angle members 418 affixed to theelongated bar 510 and respective supports bars 520 as shown. The actuators are affixed thereto by inserting the fastener through each hole in theright angle members 418 and into the actuator, as shown inFIG. 4 . Attachment points 414 are preferably holes into which the ends of the biasing elements, preferably springs, are affixed. Similarly, attachment points 413 (FIG. 4 ) are preferably holes through which bolts, pins or other fasteners are inserted to affix the plow blade.
Claims (7)
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US10/984,586 US20060107555A1 (en) | 2004-11-09 | 2004-11-09 | Universal snow plow adapter |
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US10/984,586 US20060107555A1 (en) | 2004-11-09 | 2004-11-09 | Universal snow plow adapter |
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US20060107555A1 true US20060107555A1 (en) | 2006-05-25 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080210445A1 (en) * | 2006-12-14 | 2008-09-04 | Par Aide Products Co. | Bracket for golf green plow |
US9051700B2 (en) | 2012-03-06 | 2015-06-09 | The Toro Company | V-blade snowplow having dual trip mechanism |
US9869067B2 (en) | 2014-11-13 | 2018-01-16 | Douglas Dynamics, L.L.C. | Snow plow and mount assembly |
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US20080210445A1 (en) * | 2006-12-14 | 2008-09-04 | Par Aide Products Co. | Bracket for golf green plow |
US9051700B2 (en) | 2012-03-06 | 2015-06-09 | The Toro Company | V-blade snowplow having dual trip mechanism |
US9869067B2 (en) | 2014-11-13 | 2018-01-16 | Douglas Dynamics, L.L.C. | Snow plow and mount assembly |
US10900183B2 (en) | 2014-11-13 | 2021-01-26 | Douglas Dynamics, L.L.C. | Snow plow and mount assembly |
US11332899B2 (en) | 2014-11-13 | 2022-05-17 | Douglas Dynamics, L.L.C. | Snow plow and mount assembly |
US11427978B2 (en) | 2014-11-13 | 2022-08-30 | Douglas Dynamics, L.L.C. | Snow plow and mount assembly |
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