US20040250454A1 - Snowplow - Google Patents
Snowplow Download PDFInfo
- Publication number
- US20040250454A1 US20040250454A1 US10/830,492 US83049204A US2004250454A1 US 20040250454 A1 US20040250454 A1 US 20040250454A1 US 83049204 A US83049204 A US 83049204A US 2004250454 A1 US2004250454 A1 US 2004250454A1
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- Prior art keywords
- mouldboard
- snowplow
- end portion
- right end
- edge
- 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
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- 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
- E01H5/061—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 scraper blades
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- 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
- E01H5/065—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 characterised by the form of the snow-plough blade, e.g. flexible, or by snow-plough blade accessories
Definitions
- This invention relates to a snowplow and, more particularly, to a snowplow adapted to be resiliently deflectable.
- Snowplows are well known to push snow in front of a vehicle as, for example, in the manner of the lightweight snowplow illustrated in the present inventor's U.S. Pat. No. 5,778,567, issued Jul. 14, 1998.
- the present inventor has appreciated a disadvantage with known snowplows in that if a snowplow and, particularly, a one end portion of the snowplow is forced into a relatively immovable obstacle, the snowplow is often permanently deformed, so damaged that the snowplow must be replaced.
- the present invention provides a snowplow whose end portions are resiliently deflectable for deflection forwardly or rearwardly.
- One object of the present invention is to provide a lightweight resilient snowplow.
- Another object is to provide a snowplow which when one end portion of the snowplow may be engaged with a relatively immovable obstacle, permits deflection of the end portion of the snowplow.
- Another object is to provide a composite snowplow including a flexible deformable plow board and a scraper element both of which are together deflectable, at least rearwardly.
- the present invention provides a snowplow comprising:
- the mouldboard having a front surface, a rear surface, a lower edge, an upper edge, a right end edge and a left end edge, with each edge spanning between the front surface and the rear surface,
- the mouldboard having a height measured between the lower edge and the upper edge and a width measured between the right end edge and the left end edge
- the mouldboard having a central portion between a right end portion and a left end portion
- FIG. 1 is an exploded pictorial view of a snowplow in accordance of a first embodiment with the present invention
- FIG. 2 is a front pictorial view of the assembled snowplow of FIG. 1;
- FIG. 3 is a rear pictorial view of the snowplow of FIG. 2;
- FIG. 4 is a side view of the snowplow of FIG. 2;
- FIG. 5 is a bottom view of the snowplow of FIG. 2;
- FIG. 6 is a front view of the snowplow of FIG. 2;
- FIG. 7 is a rear view of the snowplow of FIG. 2;
- FIG. 8 is a bottom view of the snowplow similar to that shown in FIG. 5, however, showing one end of the snowplow as deflected rearwardly;
- FIG. 9 is a bottom view of the snowplow similar to that shown in FIG. 5, however, showing one end of the snowplow as deflected forwardly;
- FIG. 10 is an exploded pictorial view of a snowplow in accordance with the second embodiment of the present invention.
- FIG. 11 is a pictorial view of the assembled snowplow of FIG. 10.
- FIGS. 1 to 3 show an exploded and two assembled views respectively, a snowplow 10 in accordance with the present invention as comprising three separate elements, namely, a central mounting plate or support structure 12 , a plowboard or mouldboard 14 and a scraper blade 16 .
- the mouldboard 14 has a front surface 18 , a rear surface 20 , a lower edge 22 , an upper edge 24 , a right end edge 26 and a left end edge 28 , with each of the edges 22 , 24 , 26 and 28 spanning between the front surface 18 and the rear surface 20 .
- the mouldboard is indicated as having a height H measured between the lower edge 22 and an upper edge 24 and a width W1 measured between the right end edge 26 and the left end edge 28 .
- the scraper blade 16 is shown as a thin elongate member which is adapted to be secured proximate the lower edge 22 of the mouldboard 14 and to extend across the entire width W1 of the mouldboard. As is known, the scraper blade 16 is mounted to the mouldboard 14 so as to protrude downwardly as best seen in side view in FIG. 4 beyond the lower edge 22 of the mouldboard so as to contact and engage a surface such as a roadway or driveway along which the snowplow is to be moved.
- the mouldboard 14 is effectively rectangular in shape and, in the preferred embodiment, is formed from a rectangular sheet of material of uniform thickness to have the shape as shown, that is, to be generally C-shaped in side view as seen in FIG. 4 having a forward surface 18 which is concave as directed forwardly.
- the mouldboard 14 has a top return flange 30 which is bent to extend rearwardly for the purposes of increasing the strength and resiliency of the mouldboard 14 proximate its upper edge 24 .
- the upper edge 24 and the top return flange 30 extend in a straight line.
- the mounting plate or support structure 12 as shown in the embodiment of FIG. 1 is a framework of rigid frame members of which an outer peripheral frame is formed by L-shaped angle members comprising top frame member 32 , bottom frame member 34 , right side frame member 36 and left side frame member 38 . These are joined by an intermediate upright frame member 40 and intermediate horizontal frame members 42 . The frame members are secured together to provide a relatively rigid rear support structure 12 .
- the forwardmost surfaces of the frame members are disposed in a curved plane which corresponds to a plane in which the rear surface 20 of the mouldboard 14 lies.
- the frame members present a concave C-shape forwardly and, as seen in top view, are preferably generally straight.
- the support structure 12 has a width indicated as W2 which is less than the width W 1 of the mouldboard 14 .
- the support structure 12 is mounted to the rear of the mouldboard 14 centrally of the mouldboard 14 and, preferably, relatively precisely centered on the width of the mouldboard 14 .
- the snowplow 10 and its mouldboard 14 has a central portion generally indicated 44 forward of the support structure 12 .
- the mouldboard has a right end portion 46 extending from the central portion 44 to the right end edge 26 .
- the mouldboard 14 has a left end portion 48 extending from the central portion 44 to the left end edge 28 .
- the lower edge 22 of the mouldboard 14 is generally straight over the central portion 44 and parallel to the upper edge 24 , however, the lower edge 22 over each of the right end portion 46 and the left end portion 48 angles slightly forwardly from the central portion towards each respective end.
- the lower edge of the scraper blade 16 is straight over the central portion 44 and angles or curves slightly upwardly over each of the respective right end portion 46 and left end portion 48 from the center portion to its respective end edge.
- the support structure 12 is adapted to be used as a mounting structure to mount the snowplow 10 as to a vehicle and the like using conventional mounting arrangements.
- FIG. 8 shows the snowplow 10 in a bottom view similar to that shown in FIG. 5, however, under a condition in which, in use, the snowplow 10 has been urged forwardly in the direction indicated by arrow 52 into a relatively immovable object 50 .
- the snowplow 10 has been deflected and, in this regard, the right end portion 46 is shown as having been deflected rearwardly from its normal undeflected condition as shown in FIG. 5 to a deflected condition as shown in FIG. 8.
- the combination of the scraper blade 16 over the right end portion 46 and the right end portion 46 of the mouldboard 14 are, as a combination, resiliently deflectable for deflection rearwardly relative to the central portion 44 .
- FIG. 9 which is similar to FIG. 8, however, indicates a condition in which the snowplow 10 has been moved rearwardly in the direction of arrow 54 into a relatively immovable object 56 .
- the combination of the scraper blade 16 over the left end portion 48 of the mouldboard and the left end portion 48 of the mouldboard 14 are together deflected forwardly relative to the central portion 44 .
- the materials comprising the mouldboard 14 and the support structure 12 are to be selected to permit for reasonable deflection of each of the right end portion 46 and the left end portion 48 as in the manner schematically illustrated in FIGS. 8 and 9 such that the left and right end portions 46 and 48 will be resilient and deflectable to an extent to prevent or substantially resist permanent deflection to the snowplow 10 under reasonable impacts which may be experienced in use of the snowplow. It will be appreciated, that on a vehicle urging the snowplow 10 forwardly, on one of the end portions of the snowplow 10 impacting some object as illustrated in FIG. 8, or meeting some higher than normal resistance to movement forwardly, relatively substantial deflection of one of the end portions of the snowplow will result without permanent deformation of the snowplow 10 .
- a deflection laterally of the vehicle to one side may result as to permit the vehicle with the snowplow to pass the object to one side thereof.
- the impact and deflection of the snowplow 10 may stop the movement of the vehicle forwardly in a dampened manner.
- deflection of the snowplow 10 may provide adequate time for a user to brake or otherwise stop the movement of the vehicle forwardly.
- Forward or rearward deflection of the right end portion 46 or the rear end portion 48 including not only the mouldboard 14 but also the scraper blade 16 can, for example, be of assistance as when a snowplow may be moved such that one of its ends just catches on, for example, the side wall of a building with the forward or rearward deflection of the snowplow 10 at its left or right end portion defectively and thereby reducing the extent to which the snowplow extends to that end and, thus, possibly by deflecting moving the right end edge 26 or left end edge 28 towards the center portion sufficiently to permit the snowplow 10 to pass along one side of the building.
- FIGS. 10 and 11 show a second embodiment of a snowplow 10 in accordance with the present invention.
- the second embodiment is similar to the first embodiment and similar reference numerals are used to refer to equivalent elements.
- the mouldboard 14 comprises a simple rectangular sheet of material.
- the support structure 12 also comprises a sheet of material which is pre-formed to have a fixed C-shape as seen in side cross-section.
- the scraper blade 16 is shown as comprising three portions, a center portion 60 and two side portions 62 and 64 .
- the scraper blade side portions 62 and 64 are preformed to have a curvature which curves forwardly.
- the center portion 60 may be different than the side portions as to have increased strength and rigidity, that is, to be, if desired, less resilient.
- the composite structure of the snowplow of FIGS. 10 and 11 is relatively rigid through a center portion 44 of the snowplow, however, the right and left end portions 46 and 48 of the snowplow, comprising in combination the scraper blade 16 and mouldboard 14 , each are resilient and adapted to resiliently deform forwardly and/or rearwardly.
- FIGS. 10 and 11 show elongate end edge blades 86 and 88 which are secured adjacent the end edges 26 and 28 towards reinforcing the mouldboard 14 and assisting in transferring impact forces over to mouldboard 14 and to and from the scraper blade 16 .
- the greatest resistance to forward and rearward deformation is provided where the scraper blade 16 overlies the mouldboard 14 .
- the snowplow 10 as shown in FIG. 11 may be deflected as, for example, rearwardly or forwardly, it may deflect throughout its entire height to increase or decrease the forward curvature of the composite scraper blade 16 and mouldboard 14 .
- the deflection of the, for example, right end portion 46 will, to some extent, be determined by the relative resiliency of the right end portion 46 throughout its vertical cross-section.
- the snowplow 10 comprises the composite of the scraper blade 16 and the mouldboard 14
- it will have a certain first relative resiliency.
- the snowplow 10 is merely the mouldboard 14 as, for example, in the curved section between the scraper blade 16 and the top return flange 30 , it will have a second relative resiliency.
- the mouldboard 14 may have a third relative resiliency.
- the first, second and relative resiliencies may be selected to be equal or different to develop different deflection characteristics for the snowplow.
- FIGS. 7 and 8 show for convenience of illustration a condition in which the snowplow 10 is shown to be deflected uniformly throughout its entire height about any vertical axis. Such uniform deflection is not necessary. Such uniform deflection is notionally indicated by a dotted line 72 in FIG. 6 indicating a notional axes about which as seen in FIG. 8, the right end portion 46 is deflected uniformly throughout any vertical cross-section.
- deflection is substantially about a notional vertical axis of deflection, that is, for example, with the top return flange 30 flexing rearwardly to a similar extent that the scraper blade 16 may deflect and this could be occasioned by reason of the relative flexibility of the top return flange 30 being comparable to that of the combination of the scraper blade 16 and the lower edge 22 of the mouldboard in combination and, as well, by the C-shape in side view cross-section of the mouldboard 14 having a comparable resistance to deflection.
- a curved dotted line indicated as 74 in FIG. 6 is other such notional axes about which the lowermost portion of the right end portion may be deflected with for deflection about line 74 , the greatest of deflection occurring at the junction of the rear surface 20 and the right end edge 26 and with deflection effectively decreasing as a function of an increase in the sum of the distance of any point on the snowplow from the lower edge 22 and the distance of the point from the right end edge 26 .
- the mouldboard 14 preferably comprises a unitary sheet of resiliently deformable material.
- it is a unitary sheet of plastic material, more preferably, selected from ultra-high molecular weight plastic materials.
- Preferred ultra-high molecular weight plastic sheets for use with the present invention have a modulus of elasticity at 73° F. of at least 8,000 pounds and a tensile strength elasticity at 73° F. of at least 4,500 pounds. It is preferred that the mouldboard 14 comprise a single sheet of plastic material, however, may comprise a laminate of various materials such as plastic sheeting and metal sheeting.
- the scraper blade 16 preferably is formed from one or more sheets of resilient material such as resilient metal sheet.
- the support structure 12 as shown, for example, in FIG. 1 is preferably formed from lightweight steel or aluminum angle iron.
- the mouldboard, scraper blade and support structure may be secured together by various methods including adhesive bonding and the use of mechanical fasteners such as rivets and bolts.
- a snowplow has a width in the range of six to eight feet with the width of the center portion being two to four feet and the width of each end portion 46 or 48 being in the range of one and a half to three feet, more preferably, in the range of two to three feet.
- the mouldboard 14 at the junction of the lower edge 22 and the right or left edge is capable of being deflected rearwardly a distance in the range of about 10% to 100% of the width of the end portion.
- the junction of the lower edge 22 and the right or left edge be capable of being resiliently deflectable about 5 ⁇ 8 of a foot or, more preferably, ⁇ fraction (5/4) ⁇ of a foot without permanent deformation.
- the width of the right end portion 46 is indicated as W 3 on FIG. 5.
- the width of the left end portion 48 is indicated as W 4 on FIG. 5.
- the snowplow 10 of the present invention in preferred embodiments is adapted for light plowing duties as, for example, to be routed to dmestic vehicles such as vans, suburban utility vehicles, pickup trucks and the like, as for use by a homeowner to plow driveways.
- dmestic vehicles such as vans, suburban utility vehicles, pickup trucks and the like
- the snowplow is preferably to be designed to deflect under loads to an extent that plowing of typical snow falls is not significantly impaired. Rearward flexing of the end portions 46 and 48 which results in spilling of snow to one side is not necessarily disadvantageous when large volumes of snow are being pushed, and repeated passage of the snowplow to incrementally move large snow falls can be advantageous.
- the snowplow may be designed to meet certain loads applied as, for example, to particular points on the end portions, having regard to the use to which the snowplow is intended.
- the snowplow 10 is preferably configured to absorb the forces of impact or resistance by acting in the manner of a deformable spring and the preferred design of the snowplow permits forces to be distributed as widely as possible over the component element so as to minimize localization of impact forces on any one point.
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Abstract
Description
- This invention relates to a snowplow and, more particularly, to a snowplow adapted to be resiliently deflectable.
- Snowplows are well known to push snow in front of a vehicle as, for example, in the manner of the lightweight snowplow illustrated in the present inventor's U.S. Pat. No. 5,778,567, issued Jul. 14, 1998.
- The present inventor has appreciated a disadvantage with known snowplows in that if a snowplow and, particularly, a one end portion of the snowplow is forced into a relatively immovable obstacle, the snowplow is often permanently deformed, so damaged that the snowplow must be replaced.
- To at least partially overcome the disadvantages of previously known snowplows, the present invention provides a snowplow whose end portions are resiliently deflectable for deflection forwardly or rearwardly.
- One object of the present invention is to provide a lightweight resilient snowplow.
- Another object is to provide a snowplow which when one end portion of the snowplow may be engaged with a relatively immovable obstacle, permits deflection of the end portion of the snowplow.
- Another object is to provide a composite snowplow including a flexible deformable plow board and a scraper element both of which are together deflectable, at least rearwardly.
- Accordingly, in one aspect, the present invention provides a snowplow comprising:
- an elongate planar scraper blade,
- a generally rectangular planar mouldboard, and
- a central support structure,
- the mouldboard having a front surface, a rear surface, a lower edge, an upper edge, a right end edge and a left end edge, with each edge spanning between the front surface and the rear surface,
- the mouldboard having a height measured between the lower edge and the upper edge and a width measured between the right end edge and the left end edge,
- the mouldboard having a central portion between a right end portion and a left end portion,
- the right end portion extending from the central portion to the right end edge,
- the left end portion extending from the central portion to the left end edge,
- the central support structure secured to the rear surface of the mouldboard over the central portion between the right end portion and the left end portion,
- the scraper blade mounted to the mouldboard proximate the lower edge and extending across the entire width of the mouldboard,
- the combination of the scraper blade over the right end portion of the mouldboard and the right end portion of the mouldboard being resiliently deflectable for deflection together forwardly and/or rearwardly relative the central portion, and
- the combination of scraper blade over the left end portion of the mouldboard left and the end portion of the mouldboard the being resiliently deflectable for deflection together forwardly and/or rearwardly relative the central portion.
- Further aspects and advantages of the present invention will become apparent from the following description taken together with the accompanying drawings in which:
- FIG. 1 is an exploded pictorial view of a snowplow in accordance of a first embodiment with the present invention;
- FIG. 2 is a front pictorial view of the assembled snowplow of FIG. 1;
- FIG. 3 is a rear pictorial view of the snowplow of FIG. 2;
- FIG. 4 is a side view of the snowplow of FIG. 2;
- FIG. 5 is a bottom view of the snowplow of FIG. 2;
- FIG. 6 is a front view of the snowplow of FIG. 2;
- FIG. 7 is a rear view of the snowplow of FIG. 2;
- FIG. 8 is a bottom view of the snowplow similar to that shown in FIG. 5, however, showing one end of the snowplow as deflected rearwardly;
- FIG. 9 is a bottom view of the snowplow similar to that shown in FIG. 5, however, showing one end of the snowplow as deflected forwardly;
- FIG. 10 is an exploded pictorial view of a snowplow in accordance with the second embodiment of the present invention; and
- FIG. 11 is a pictorial view of the assembled snowplow of FIG. 10.
- Reference is made first to FIGS.1 to 3 which show an exploded and two assembled views respectively, a
snowplow 10 in accordance with the present invention as comprising three separate elements, namely, a central mounting plate orsupport structure 12, a plowboard ormouldboard 14 and ascraper blade 16. - The
mouldboard 14 has afront surface 18, arear surface 20, alower edge 22, anupper edge 24, aright end edge 26 and aleft end edge 28, with each of theedges front surface 18 and therear surface 20. The mouldboard is indicated as having a height H measured between thelower edge 22 and anupper edge 24 and a width W1 measured between theright end edge 26 and theleft end edge 28. - The
scraper blade 16 is shown as a thin elongate member which is adapted to be secured proximate thelower edge 22 of themouldboard 14 and to extend across the entire width W1 of the mouldboard. As is known, thescraper blade 16 is mounted to themouldboard 14 so as to protrude downwardly as best seen in side view in FIG. 4 beyond thelower edge 22 of the mouldboard so as to contact and engage a surface such as a roadway or driveway along which the snowplow is to be moved. - The
mouldboard 14 is effectively rectangular in shape and, in the preferred embodiment, is formed from a rectangular sheet of material of uniform thickness to have the shape as shown, that is, to be generally C-shaped in side view as seen in FIG. 4 having aforward surface 18 which is concave as directed forwardly. Themouldboard 14 has atop return flange 30 which is bent to extend rearwardly for the purposes of increasing the strength and resiliency of themouldboard 14 proximate itsupper edge 24. Theupper edge 24 and thetop return flange 30 extend in a straight line. - The mounting plate or
support structure 12 as shown in the embodiment of FIG. 1 is a framework of rigid frame members of which an outer peripheral frame is formed by L-shaped angle members comprisingtop frame member 32,bottom frame member 34, rightside frame member 36 and leftside frame member 38. These are joined by an intermediateupright frame member 40 and intermediatehorizontal frame members 42. The frame members are secured together to provide a relatively rigidrear support structure 12. - The forwardmost surfaces of the frame members are disposed in a curved plane which corresponds to a plane in which the
rear surface 20 of themouldboard 14 lies. In this regard, as seen in side view, the frame members present a concave C-shape forwardly and, as seen in top view, are preferably generally straight. - The
support structure 12 has a width indicated as W2 which is less than the width W1 of themouldboard 14. - The
support structure 12 is mounted to the rear of themouldboard 14 centrally of themouldboard 14 and, preferably, relatively precisely centered on the width of themouldboard 14. - As best seen, for example, in FIG. 7, the
snowplow 10 and itsmouldboard 14 has a central portion generally indicated 44 forward of thesupport structure 12. The mouldboard has aright end portion 46 extending from thecentral portion 44 to theright end edge 26. Themouldboard 14 has aleft end portion 48 extending from thecentral portion 44 to theleft end edge 28. - As best seen in the bottom view in FIG. 5, the
lower edge 22 of themouldboard 14 is generally straight over thecentral portion 44 and parallel to theupper edge 24, however, thelower edge 22 over each of theright end portion 46 and theleft end portion 48 angles slightly forwardly from the central portion towards each respective end. As seen in FIG. 6, preferably, the lower edge of thescraper blade 16 is straight over thecentral portion 44 and angles or curves slightly upwardly over each of the respectiveright end portion 46 andleft end portion 48 from the center portion to its respective end edge. - The
support structure 12 is adapted to be used as a mounting structure to mount thesnowplow 10 as to a vehicle and the like using conventional mounting arrangements. - Reference is made to FIG. 8 which shows the
snowplow 10 in a bottom view similar to that shown in FIG. 5, however, under a condition in which, in use, thesnowplow 10 has been urged forwardly in the direction indicated byarrow 52 into a relativelyimmovable object 50. As a result of the forces urging thesnowplow 10 in a forward direction, with contact of theobject 50, thesnowplow 10 has been deflected and, in this regard, theright end portion 46 is shown as having been deflected rearwardly from its normal undeflected condition as shown in FIG. 5 to a deflected condition as shown in FIG. 8. As seen in FIG. 8, the combination of thescraper blade 16 over theright end portion 46 and theright end portion 46 of themouldboard 14 are, as a combination, resiliently deflectable for deflection rearwardly relative to thecentral portion 44. - Reference is made to FIG. 9 which is similar to FIG. 8, however, indicates a condition in which the
snowplow 10 has been moved rearwardly in the direction ofarrow 54 into a relativelyimmovable object 56. As shown in FIG. 9, the combination of thescraper blade 16 over theleft end portion 48 of the mouldboard and theleft end portion 48 of themouldboard 14 are together deflected forwardly relative to thecentral portion 44. - The materials comprising the
mouldboard 14 and thesupport structure 12 are to be selected to permit for reasonable deflection of each of theright end portion 46 and theleft end portion 48 as in the manner schematically illustrated in FIGS. 8 and 9 such that the left andright end portions snowplow 10 under reasonable impacts which may be experienced in use of the snowplow. It will be appreciated, that on a vehicle urging thesnowplow 10 forwardly, on one of the end portions of thesnowplow 10 impacting some object as illustrated in FIG. 8, or meeting some higher than normal resistance to movement forwardly, relatively substantial deflection of one of the end portions of the snowplow will result without permanent deformation of thesnowplow 10. Under some impact conditions, a deflection laterally of the vehicle to one side may result as to permit the vehicle with the snowplow to pass the object to one side thereof. Alternatively, the impact and deflection of thesnowplow 10 may stop the movement of the vehicle forwardly in a dampened manner. Alternatively, after impact, deflection of thesnowplow 10 may provide adequate time for a user to brake or otherwise stop the movement of the vehicle forwardly. - Forward or rearward deflection of the
right end portion 46 or therear end portion 48 including not only themouldboard 14 but also thescraper blade 16 can, for example, be of assistance as when a snowplow may be moved such that one of its ends just catches on, for example, the side wall of a building with the forward or rearward deflection of thesnowplow 10 at its left or right end portion defectively and thereby reducing the extent to which the snowplow extends to that end and, thus, possibly by deflecting moving theright end edge 26 orleft end edge 28 towards the center portion sufficiently to permit thesnowplow 10 to pass along one side of the building. - Reference is made to FIGS. 10 and 11 which show a second embodiment of a
snowplow 10 in accordance with the present invention. The second embodiment is similar to the first embodiment and similar reference numerals are used to refer to equivalent elements. - In the second embodiment, the
mouldboard 14 comprises a simple rectangular sheet of material. Thesupport structure 12 also comprises a sheet of material which is pre-formed to have a fixed C-shape as seen in side cross-section. - The
scraper blade 16 is shown as comprising three portions, acenter portion 60 and twoside portions blade side portions center portion 60 may be different than the side portions as to have increased strength and rigidity, that is, to be, if desired, less resilient. With theend portions mouldboard 14, the net result is that themouldboard 14 has its end portions which curve forwardly as illustrated in FIG. 11. - As with the first embodiment, the composite structure of the snowplow of FIGS. 10 and 11 is relatively rigid through a
center portion 44 of the snowplow, however, the right andleft end portions scraper blade 16 andmouldboard 14, each are resilient and adapted to resiliently deform forwardly and/or rearwardly. - FIGS. 10 and 11 show elongate
end edge blades mouldboard 14 and assisting in transferring impact forces over tomouldboard 14 and to and from thescraper blade 16. - In the second embodiment illustrated in FIGS. 10 and 11, in any vertical cross-section through the
snowplow 10, the greatest resistance to forward and rearward deformation is provided where thescraper blade 16 overlies themouldboard 14. When thesnowplow 10 as shown in FIG. 11 may be deflected as, for example, rearwardly or forwardly, it may deflect throughout its entire height to increase or decrease the forward curvature of thecomposite scraper blade 16 andmouldboard 14. - In the context of the first embodiment of FIGS.1 to 9, the deflection of the, for example,
right end portion 46 will, to some extent, be determined by the relative resiliency of theright end portion 46 throughout its vertical cross-section. For example, where thesnowplow 10 comprises the composite of thescraper blade 16 and themouldboard 14, it will have a certain first relative resiliency. Where thesnowplow 10 is merely themouldboard 14 as, for example, in the curved section between thescraper blade 16 and thetop return flange 30, it will have a second relative resiliency. Where thesnowplow 10 comprises merely themouldboard 14 proximate theupper edge 22 and including thetop return flange 30, themouldboard 14 may have a third relative resiliency. The first, second and relative resiliencies may be selected to be equal or different to develop different deflection characteristics for the snowplow. - FIGS. 7 and 8 show for convenience of illustration a condition in which the
snowplow 10 is shown to be deflected uniformly throughout its entire height about any vertical axis. Such uniform deflection is not necessary. Such uniform deflection is notionally indicated by a dotted line 72 in FIG. 6 indicating a notional axes about which as seen in FIG. 8, theright end portion 46 is deflected uniformly throughout any vertical cross-section. - With deflection notionally about the dotted line indicated as72, deflection is substantially about a notional vertical axis of deflection, that is, for example, with the
top return flange 30 flexing rearwardly to a similar extent that thescraper blade 16 may deflect and this could be occasioned by reason of the relative flexibility of thetop return flange 30 being comparable to that of the combination of thescraper blade 16 and thelower edge 22 of the mouldboard in combination and, as well, by the C-shape in side view cross-section of themouldboard 14 having a comparable resistance to deflection. - A curved dotted line indicated as74 in FIG. 6 is other such notional axes about which the lowermost portion of the right end portion may be deflected with for deflection about line 74, the greatest of deflection occurring at the junction of the
rear surface 20 and theright end edge 26 and with deflection effectively decreasing as a function of an increase in the sum of the distance of any point on the snowplow from thelower edge 22 and the distance of the point from theright end edge 26. - The
mouldboard 14 preferably comprises a unitary sheet of resiliently deformable material. Preferably, it is a unitary sheet of plastic material, more preferably, selected from ultra-high molecular weight plastic materials. - Preferred ultra-high molecular weight plastic sheets for use with the present invention have a modulus of elasticity at 73° F. of at least 8,000 pounds and a tensile strength elasticity at 73° F. of at least 4,500 pounds. It is preferred that the
mouldboard 14 comprise a single sheet of plastic material, however, may comprise a laminate of various materials such as plastic sheeting and metal sheeting. - The
scraper blade 16 preferably is formed from one or more sheets of resilient material such as resilient metal sheet. - The
support structure 12 as shown, for example, in FIG. 1 is preferably formed from lightweight steel or aluminum angle iron. - The mouldboard, scraper blade and support structure may be secured together by various methods including adhesive bonding and the use of mechanical fasteners such as rivets and bolts.
- In accordance with a preferred embodiment of the present invention, a snowplow has a width in the range of six to eight feet with the width of the center portion being two to four feet and the width of each
end portion mouldboard 14 at the junction of thelower edge 22 and the right or left edge is capable of being deflected rearwardly a distance in the range of about 10% to 100% of the width of the end portion. For example, for asnowplow 10 having a width of eight feet and the width of each end portion being two and a half feet, it is desired that the junction of thelower edge 22 and the right or left edge be capable of being resiliently deflectable about ⅝ of a foot or, more preferably, {fraction (5/4)} of a foot without permanent deformation. - The width of the
right end portion 46 is indicated as W3 on FIG. 5. - The width of the
left end portion 48 is indicated as W4 on FIG. 5. - The
snowplow 10 of the present invention in preferred embodiments is adapted for light plowing duties as, for example, to be routed to dmestic vehicles such as vans, suburban utility vehicles, pickup trucks and the like, as for use by a homeowner to plow driveways. - The snowplow is preferably to be designed to deflect under loads to an extent that plowing of typical snow falls is not significantly impaired. Rearward flexing of the
end portions - The snowplow may be designed to meet certain loads applied as, for example, to particular points on the end portions, having regard to the use to which the snowplow is intended.
- The
snowplow 10 is preferably configured to absorb the forces of impact or resistance by acting in the manner of a deformable spring and the preferred design of the snowplow permits forces to be distributed as widely as possible over the component element so as to minimize localization of impact forces on any one point. - While the invention has been described with reference to preferred embodiments, the invention is not so limited. Many modifications and variations will now occur to a person skilled in the art. For a definition of the invention, reference is made to the appended claims.
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2426735A CA2426735C (en) | 2003-04-24 | 2003-04-24 | Snowplow |
CA2,426,735 | 2003-04-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040250454A1 true US20040250454A1 (en) | 2004-12-16 |
Family
ID=33315168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/830,492 Abandoned US20040250454A1 (en) | 2003-04-24 | 2004-04-23 | Snowplow |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040250454A1 (en) |
CA (1) | CA2426735C (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090249659A1 (en) * | 2008-04-03 | 2009-10-08 | Gamble Ii Robert N | Snow Plow Deflector |
WO2011022136A1 (en) * | 2009-08-19 | 2011-02-24 | Meyer Products, Llc | Method and apparatus for attaching a moldboard to a moldboard frame |
US8191288B2 (en) * | 2005-11-03 | 2012-06-05 | Pro-Tech Manufacturing And Distribution, Inc. | Reversible snow pusher and coupler |
US8763281B2 (en) * | 2010-07-16 | 2014-07-01 | Soucy International Inc. | Plow |
US9032650B2 (en) | 2012-03-13 | 2015-05-19 | Ignazio Iacona | Removable plow attachment for snow blower |
US9151006B2 (en) | 2012-02-09 | 2015-10-06 | Pro-Tech Manufacturing And Distribution, Inc. | Material pusher with control system |
US20180042423A1 (en) * | 2015-03-17 | 2018-02-15 | Cma Macchine Per Caffe' S.R.L. | Device for cleaning a filter holder of a coffee machine |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3397469A (en) * | 1966-02-15 | 1968-08-20 | Espey T. Browning | Scraping blade attachment for a rake |
US3477149A (en) * | 1967-12-07 | 1969-11-11 | Charles H Wagner | Snow plow moldboard with resilient scraping blade |
US4590694A (en) * | 1984-11-08 | 1986-05-27 | U.S. Highway Products, Inc. | Snow plow with bar reinforced deformable blade |
US4651451A (en) * | 1985-02-07 | 1987-03-24 | Logan Manufacturing Company | Lightweight snow compactor for ski runs |
US4819349A (en) * | 1987-02-25 | 1989-04-11 | Donald Mensch | Offal scraper |
US4833799A (en) * | 1988-08-08 | 1989-05-30 | Harte Francis A | Automotive snow plow with tow ring receiving push bar plates |
US4837951A (en) * | 1988-09-23 | 1989-06-13 | Frink America, Inc. | Reversible moldboard assembly |
US5018284A (en) * | 1987-03-31 | 1991-05-28 | Japan as represented by Director of Construction Machinery Works of Hokkaido Development Bureau | Snow plow for vehicles |
US5025577A (en) * | 1989-08-03 | 1991-06-25 | Frink America, Inc. | Adjustable one-way trip edge snow plow |
US5048207A (en) * | 1990-03-13 | 1991-09-17 | Frink America, Inc. | Adjustable discharge wing plow |
US5075985A (en) * | 1990-08-06 | 1991-12-31 | Mensch Donald L | Offal scraper |
US5079866A (en) * | 1990-04-23 | 1992-01-14 | Cives Corporation | Plow assembly with flexible moldboard |
US5084992A (en) * | 1991-04-22 | 1992-02-04 | Logan Manufacturing Company | Snow tiller with compactor pan |
US5088215A (en) * | 1990-12-03 | 1992-02-18 | The Lewis Berkman Company | Plastic moldboards for snowplows and the like |
US5142800A (en) * | 1991-12-27 | 1992-09-01 | Logan Manufacturing Company | Snow groomer tow frame alignment device |
US5477600A (en) * | 1993-10-25 | 1995-12-26 | Tenco Machinery Ltd. | Snow plow with deformable moldboard |
US5659984A (en) * | 1992-12-21 | 1997-08-26 | Kassohrer Gelandefahzeug GmbH | Snow grooming device |
US5819443A (en) * | 1997-07-25 | 1998-10-13 | Winter; William L. | Snow removal apparatus |
US6134813A (en) * | 1998-12-18 | 2000-10-24 | The Louis Berkman Company | Plastic moldboard plow |
-
2003
- 2003-04-24 CA CA2426735A patent/CA2426735C/en not_active Expired - Lifetime
-
2004
- 2004-04-23 US US10/830,492 patent/US20040250454A1/en not_active Abandoned
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3397469A (en) * | 1966-02-15 | 1968-08-20 | Espey T. Browning | Scraping blade attachment for a rake |
US3477149A (en) * | 1967-12-07 | 1969-11-11 | Charles H Wagner | Snow plow moldboard with resilient scraping blade |
US4590694A (en) * | 1984-11-08 | 1986-05-27 | U.S. Highway Products, Inc. | Snow plow with bar reinforced deformable blade |
US4651451A (en) * | 1985-02-07 | 1987-03-24 | Logan Manufacturing Company | Lightweight snow compactor for ski runs |
US4819349A (en) * | 1987-02-25 | 1989-04-11 | Donald Mensch | Offal scraper |
US5018284A (en) * | 1987-03-31 | 1991-05-28 | Japan as represented by Director of Construction Machinery Works of Hokkaido Development Bureau | Snow plow for vehicles |
US4833799A (en) * | 1988-08-08 | 1989-05-30 | Harte Francis A | Automotive snow plow with tow ring receiving push bar plates |
US4837951A (en) * | 1988-09-23 | 1989-06-13 | Frink America, Inc. | Reversible moldboard assembly |
US5025577A (en) * | 1989-08-03 | 1991-06-25 | Frink America, Inc. | Adjustable one-way trip edge snow plow |
US5048207A (en) * | 1990-03-13 | 1991-09-17 | Frink America, Inc. | Adjustable discharge wing plow |
US5079866A (en) * | 1990-04-23 | 1992-01-14 | Cives Corporation | Plow assembly with flexible moldboard |
US5075985A (en) * | 1990-08-06 | 1991-12-31 | Mensch Donald L | Offal scraper |
US5088215A (en) * | 1990-12-03 | 1992-02-18 | The Lewis Berkman Company | Plastic moldboards for snowplows and the like |
US5084992A (en) * | 1991-04-22 | 1992-02-04 | Logan Manufacturing Company | Snow tiller with compactor pan |
US5142800A (en) * | 1991-12-27 | 1992-09-01 | Logan Manufacturing Company | Snow groomer tow frame alignment device |
US5659984A (en) * | 1992-12-21 | 1997-08-26 | Kassohrer Gelandefahzeug GmbH | Snow grooming device |
US5477600A (en) * | 1993-10-25 | 1995-12-26 | Tenco Machinery Ltd. | Snow plow with deformable moldboard |
US5819443A (en) * | 1997-07-25 | 1998-10-13 | Winter; William L. | Snow removal apparatus |
US6134813A (en) * | 1998-12-18 | 2000-10-24 | The Louis Berkman Company | Plastic moldboard plow |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8191288B2 (en) * | 2005-11-03 | 2012-06-05 | Pro-Tech Manufacturing And Distribution, Inc. | Reversible snow pusher and coupler |
US8621769B2 (en) | 2005-11-03 | 2014-01-07 | Pro-Tech Manufacturing And Distribution, Inc. | Snow pusher for ice and snow removal |
US20090249659A1 (en) * | 2008-04-03 | 2009-10-08 | Gamble Ii Robert N | Snow Plow Deflector |
US7721471B2 (en) * | 2008-04-03 | 2010-05-25 | Sno-Way International, Inc. | Snow plow deflector |
WO2011022136A1 (en) * | 2009-08-19 | 2011-02-24 | Meyer Products, Llc | Method and apparatus for attaching a moldboard to a moldboard frame |
US8763281B2 (en) * | 2010-07-16 | 2014-07-01 | Soucy International Inc. | Plow |
US9151006B2 (en) | 2012-02-09 | 2015-10-06 | Pro-Tech Manufacturing And Distribution, Inc. | Material pusher with control system |
US9032650B2 (en) | 2012-03-13 | 2015-05-19 | Ignazio Iacona | Removable plow attachment for snow blower |
US20180042423A1 (en) * | 2015-03-17 | 2018-02-15 | Cma Macchine Per Caffe' S.R.L. | Device for cleaning a filter holder of a coffee machine |
US11197577B2 (en) * | 2015-03-17 | 2021-12-14 | Cma Macchine Per Caffe' S.R.L. | Device for cleaning a filter holder of a coffee machine |
Also Published As
Publication number | Publication date |
---|---|
CA2426735A1 (en) | 2004-10-24 |
CA2426735C (en) | 2013-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SNOWBEAR LIMITED (FORMERLY 1652344 ONTARIO INC.), Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RSM RICHTER INC.;REEL/FRAME:017105/0706 Effective date: 20051005 Owner name: RSM RICHTER INC., CANADA Free format text: AMENDED AND RESTATED ORDER;ASSIGNOR:SNOWBEAR LIMITED;REEL/FRAME:017105/0483 Effective date: 20050223 Owner name: SNOWBEAR LIMITED, CANADA Free format text: CHANGE OF NAME;ASSIGNOR:1652344 ONTARIO INC.;REEL/FRAME:017105/0710 Effective date: 20050425 Owner name: SNOWBEAR LIMITED, CANADA Free format text: CONFIRMATORY ASSIGNMENT;ASSIGNOR:JAGER, WILLEM;REEL/FRAME:017105/0815 Effective date: 20050928 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |