US1871565A - Snowplow nose and cutter bar therefor - Google Patents

Description

A g. 16, 193 G. c; SOULE ET AL 4 1,871,555

SNQWPLOW NOSE AND CUTTER BAR. THEREFOR Y Filed Oct. 18, 1929 I lnvenfirs.

5-, 0 HNB PVoozwwzy.

Patented Aug. 16, 1932 usirso "Sm lenses;

res EPA-TENT olFFics- 3' GEORGE C. SOULE AND JOHN B. WOODBUBY, OF SOUTH PORTLAND, MAINE, ASSIGNQBS 7 T0 MAINE STEEL PRODUCTSZGOMPANY, OF PORTLAND, MAINE, A CORPORATION OF MAINE Application filed October 18,

This invention relates to snow plows and particularly to nose constructions for the same. Some plows have been heretofore made in two principal types,,one with a steep sided nose, and the other with noses whose r lower edges met the. ground with a gently sloping angle. These types were expected to meet all conditions, but while each type has} been generally satisfactory for certain condi: tions, each has failed to meet certain other adapted. I

The two moreusual and more contradictory conditions are .lirst'where deep heavy drifts have been formed which require great power to push the plow through. On these the steep sidedplow does not push through as easily as the plow whose lower edge meets the ground at a gentle angle. .1 r

The second condit'on exists where there is hard packed or trodden snow onwhich all plows have had atendency to ride up, thus leaving unremoved snow on the road. On

this type of work the steep sided plow has generally done better work because its steep angles of incidence to the road surface creates what is commonly called suction and tends tordig downand remove the hard snow close. to the ground. This plow, however, due to the steepness of its sides is pushed through deep heavy snows only with great difficulty and tends to bounce back from hardpacked drifts. The object of this invention is to produce a plow which will meet both of these "conditions eificiently while otherwise fulfilling thegeneral requirements of a plow nose. It provides a type of nose which holds the plow; down without holding it back. It provides a plow capable of being pushed through heavy drifts without loss of efici'ency due to high resistance and in avoiding the riding up tendency above described leaves a road which A is properly cleaned and-which'has a surface, affordlng a maximum of-traction for the motor equipment which pushes the plow. This is 'very important because a layerof snow left on a road surface seriously reduces the tractive power, especially in the case of plows mounted on trucks, as the traction area sNowrI ioW nosE AND ou'rrnn BAR. 'rnnnnror.

1929. Serial No. 400,545.

that case is somewhat limited and trucks tend to dig in and lose traction if too much snow isleft on theroad. V

Our present invention contemplates a plow nose having'this general lifting and'rolling function present in the construction and de;

sign of its mold boards, but also provided with a cutter bar which is normally cooperative with thegeneral curvature of the mold boardto provide for the lifting of the snow,

1 and has a downwardly disposed edge adapted to counteract the tendency of the cutter bar to lift and ride in snows that are compacted on :the road surface. These together: with various other features constitute the inventions involved in our present application.

As illustrative thereof we have shown in the accompanying drawing 7 an which illustrates the principles involved and at the same time indicates astructure which is well adapted to practical use and capable of embodiment in snow plow construction of very high efliciency and capable of manufac-v ture at reasonable cost. In the "drawing:

Fig. 1 1s a front elevation of a plownose embodiment;

in: accordance with our invention. h

Fig. 2 is a bottom view of the same.

Fig. 3 is a sectional view throughthe nose and cutter bar, and v p b Fig. 4 is an enlarged section of the cutter ar.

In the form shown our snow plo-w nose consists of a pair of side mold boards 1 which are welded together at a common joint 2.. These moldboards l which are concavedand disposed in a V or wedge shape are supported back of their weld line2 by transverse webs 8 which are also preferably welded to the mold plates and constitute a bulk head which braces the forward end of the plow. At their lower edges the mold plates 1 carrycutter bars 5 having a mainsurface 5? dis}; posed at as low an angle to the groun'das possible, while still leaving room enoughunder it for reinforcements sufficiently strong to enable it to withstandthe shocks and strains to which it issubjected. The object of this low angle is to convert a fixed and"- ,given amount of push available from the motive equipment into the greatest possible 1. The upper portion of these mold boards{ may *be variouslycurved or concaved-accordingto the particular kind of work that they edge portion of the noseof the plow, itwill web members*8 weldedtothe pieces 'T' and also to the mold member 1 and to the rein-' provides mold plates which may have the delifting power on the general principle of a wedge. The more slender the Wedge the greater the lifting power for any given push.

For such a construction as is herein shown, an angle of substantially 25 has been found practical but still lower angles may be found 'mately 20 and its edge still further carried down by a bevel 5 -at an angle of approxe imately 20, so that the sum of the-bend and the bevel amount to about. 40. This 'convertsthe low angle of the upper portion of the cutter bar 5 into a sharp angle of incidencewith the ground of approximately65 so that the cutter bar isin reality concaved reverse'ly to the -'curvature"o'f the 'mold boards are :to do and "whether for truck or tractor use." In the present nose, however, they merge at a low angle into the cutter bar region so as to form with it a substantially continuous wedging surface of low angularity as before described. I

-Referring now to the formation of this be noted .thatwe provide a reinforcing bar 7 6which underlies the cutter-bar 5 preferably including'the plate 1 which constitutes the mold board of thenose. I

At the rear of this edge area we provide;

angle-beams 7 which act as general frame pieces for the nose construction. The two pieces 7 are brought together in the line of the apeXcf the V and are suitably welded.

, These angle-pieces 7 are connected by fitted forcingbar-G. These constitute a beaconstruction on each side ofthe nose which 1s closed'inby a plate-9 which is welded at one; edge to the angle beams 7 and its other edgeto the reinforcing bar 6 and'at the same time spansthe-webs'8 to whichit is welded to form aunitar-y structure.

The weld of the two plates l at the portion 2constitutes a vertical V-shaped structure and this is reinforced bytl e transverse plate '3 which provides a pyramidal member alfordinggreatstrength' to the nose of the plow. This structure is reinforced byacross beam 10 which backs up the aforementioned structure by web members 11 welded thereto. The cross member l0-is part of-the main frame ofthe nose member of-the plow and is in turn supported by other frame members W that of "the cutter bar. 'These are-welded not-necessary to be'considered herein.

that we have provided a nosemember which means'forthe plow. The downturned portion of the cutter bar tends to keep the nose .of :the plow in'close relation to the surface of the road or in other words it holds the plow down without holding it back. At the same timethis-is-so positioned to the angle of the mold board that no resistance is en backward.

While such a cutter bar is' of fcourse'su'bjected to unusual strains in meeting the re s'istance of the snow and thevertical strains; ofthe compaction, we have provided fora basis of unitary distribution of these strains through the combination of our cutter bar with the mold boards through a simple. base countered by the upturned snowas it is moved frame construction i-whichwe have heretofore the welded member 9-=w'hic'h constitutes the cover or under-wear surface of theplow nose. Inoperation'the noseo'f such a plow will divide and laterally shift ordinary banks-of snow inthe usual way, but the lower por-f' tiono'fthenose of the v-shaped plow approaches soclosely to a flat angle with the ground'that it will 'liftor'roll the snow instead of merely pushing and jamming it as is the case with "the ordinary steep sided v shaped plow. I 7 fVVhil approaching a flat angle with the ground by reason of which the nose pene tratesthe hardpacked'drifta'it has-the tendency=onaccount of its downturned edge tol hold'to theroad level to undercuthard snow; and ice andnotpick up orride as has been the case-with otherjplows with a low'angle nose.

The forwa'rd edgeof thecutterbars 5 at the juncture of the 'V-sh-aped portion offlthe plo isfitted with a member 17. This conf sistsof a pair of plates or-steel castings-which conform in their cross section generally nto ata-common joint which isdisposed inzthei line of :the central Weld 2. .Theyincludeat: their pointof juncture a :plate l8xwhich :is

formed with a lower edge 18 which acts'as to which it is attached, and reinforcing bars a shoe or rider in case an obstruction is met underlying said'cutter bars.

such as a railroad crossing or other obstacle.

In testimony The cutter bars 5 are detachably bolted to. tures.

the reinforcing bar 6 so as to be removableor replaceable in case of wear or damage. As shown these bars are simple straight lengths and lit on to the bar 17 which constitutes a removable member also replaceable.

As before stated, the structure shown'is a preferred structure in actual practice as one in which the parts combine to give very great strength and a very high efficiency. The

cutter bars, however, may be given other mounting and other backing and may be modified in forms within the limits of the claims directed thereto.

What we therefore claim and desire to secure by LettersPatent is 1. In a snow plow nose, a curved mold board having a low angle at its lower edge, and a cutter bar attached to said edge and having a portion in substantial continuation of the angle and havingits lower margin downwardly divergent therefrom to constitute a downwardly inclined cutting edge.

2. In a'snow plow nose, a curved V shaped mold'board having a low angle at its lower edges, and a cutter bar attached to each of said edges and having portions in substantial continuation of curvature of the mold board but having their lower margins turned downwardly to constitute an inclined cutting ed e.

5 A cutter bar for the curved mold board of a snow plow having a portion in substan board and having portions in substantial continuation of the curvature of said mold boards and terminating in downwardly inclined cutting edges whereby each cutter bar as a whole is in effect concaved in reverse direction to the curvature of the mold board to which it is attached.

6. In an snow plow nose, a pair of V-shaped mold boards of concaved curvature, a cutter bar attached to each lower edge of each mold board and having portions in substantial continuation of the curvature of said mold boards and terminating in downwardly inclined cutting edges whereby each cutter bar as a whole is in effect concaved in reverse direction to the curvature of the mold board whereof we aflix our signa- GEORGE G. SOULE. JOHN B. WOODBURY.

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