US2066207A - Snow plow - Google Patents

Description

Dec. 29, 1936. F. v. LEs'rlNA SNOW PLOW Filed July 30, 1936 2 Sheets-Sheet 1 WNY 3 3 3 C 3v. C E C E E M! MWI v NI wwf ATTORNEYS Dec. 29, 1936.

F. v. I EsTlNA SNOW PLOW Filed July 50, 1956 2 Sheets-Sheet 2 INVENTOR ATTORNEYS Patented Dec. 29, 1936 UNITED'STATES PATENT OFFICE SNOW PLOW Frank V. Lestina, Monona, Iowa Application July 30, 1936, Serial No. 93,495

2 Claims.

This invention relates to snow plows and has for an object to provide a snow plow having a vertical spiral cutter and having diverging screw carriers on opposite sides of a deflector in rear of the cutter adapted to remove the snow dislodged by the cutter and deect it rearwardly and to the sides of the tractor or other motor vehicle t0 which the snow plow may be applied.

A further object is to provide a simplified snow plow the moving parts of which may be power driven from a suitable shaft on the tractor or other motor vehicle and which will be formed of a few strong simple and durable parts, which will be easy to manufacture, and which will not easily get out of order.

With the above and other objects in View the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without dep-arting from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings forming part of this specification,

Figure 1 is a side elevation of a snow plow constructed in accordance with the invention and applied to a caterpillar tractor.

Figure 2 is a plan view of the snow plow and tractor shown in Figure 1.

Figure 3 is a vertical sectional view taken on the line 3-3 of Figure l looking in the direction of the arrowheads.

Figure 4 is a longitudinal sectional view of the snow plow.

Figure 5 is a detail elevation of the rear supporting bracket of the snow plow.

Figure 6 is a detail perspective View of the bottom cutting blade.

Figure '7 is a fragmentary detail elevation of one of the screw carriers.

Figure 8 is a detail sectional View showing one of the knife blades on vthe front vertical cutter.

Figure 9 is a cross sectional View taken on the line 9-9 of Figure 8 looking in the direction of the arrowheads.

Referring now to the drawings in which like characters of reference designate similar parts in the various views, Ill designates a conventional Caterpillar tractor, to which the snow plow is illustrated as being applied.

The snow plow comprises a bottom plate II, which is inclined upwardly from front to rear, as shown best in Figure 4. A rear A-shaped bracket I2, shown in elevation in Figure 5, has the leg bolted at the bottom to the base plate as shown at I3 in Figure 1. A bearing box I4 is mounted on top of the bracket to journal the rear end of a power shaft I5. The bracket is 5 1 braced by a diagonal brace I 6 which extends from the base plate to the top of the bracket.

A substantially rectangular frame I'I is mounted on the front of the bottom plate and has the sides I8 sloped rearwardly as best shown in Fig- 10 ure l. The bottom of the frame may be secured to the base plate in any preferred manner and the top of the frame is provided on the underneath sides with a gear case I9, best shown in Figures 1 and 4, in which the forward end of the 15 power shaft I5 is journaled.

A vertical screw cutter 20 has the shaft 2I thereof journaled in ball bearings 22 and 23 mounted respectively in the gear case and on the base plate. The power shaft I5 is geared to 20 the shaft of the cutter by bevel gears 24 and 25. The spiral blade of the cutter is equipped at diametrically opposite points with upstanding knives 2B having angularly directed lower ends 2I bolted as shown at 28 in Figure 8, to the spiral 25 blade of the rotary cutter.

A pair of cross braces 29, best shown in Figure 2, are bolted at the front ends to the top of the front supporting frame I'I and are bolted at the rear ends to the-bearing box I 4 of the rear A- 3o shaped bracket I2 to rigidly secure these parts in. place. A diagonal brace bar 30, best shown in Figure 1, is connected at the upper end to the top of the front supporting frame and is connected at the rear end to the rear portion of the base 35 plate to further rigidly anchor the front supporting frame in place. This brace bar intersects the beforementioned brace bar I6 which braces the rear A-shaped bracket I2, as best shown in Fgure 4.

A deector 3l of substantially inverted V- shaped cross section, as best shown in Figure 3, is bolted to the base plate, as shown at 32` in Figure 4, the sides of the deflector gradually increasing in height from front to rear, as best shown in the l-ast named figure. The lateral edges of the delector at the rear upper end are curved outwardly to provide wings 33 which deect the snow laterally from the rear end of the snow plow.

The bottom front end of the deector is provided with spaced bearing boxes 34, as best shown in Figures 1 and 2, which receive the lower ends of screw carriers 35 which are mounted in respective troughs 36 fixed to the deflector, and 55 extending upwardly toward the rear of the deector. The carriers diverge from e-ach other and are adapted to lift the snow dislodged by the front vertical cutter and carry it upwardly and rearwardly to the wings 33 which as heretofore mentioned deect the snow outwardly beyond the sides of the snow plow.

As best shown in Figure 2, the upper ends of the shafts 31 of the screw carriers are journaled in suitable bearings 38 formed in an irregular shaped cross bar Y39 which is mounted at the upper rear end of the snow plow by means of extensions 40 of the diagonal brace bars 29, these extensions being continued rearwardly as shown at 4I and bolted as shown at 42 to any convenient part of the tractor. The cross bar 33 is also secured to the tractor by upright brace bars 43, as best shown in Figure 1.

As also best shown in Figure 2 the cross bar 39 is equipped with sleeves 44 in which are journaled stub shafts 45 the outer ends of which are geared to the shafts 31 of the screw or worm carriers, by means of meshing bevel gears 46 f and 41. The inner ends of the stub shafts 45 are geared to the power shaft I5 through the instrumensimultaneously drive the vertical cutter 20 and both screw carriers 35, as best shown in Figure 4.

In operation as the snow plow is pushed forwardly by the Caterpillar tractor on the roadway the vertical rotary cutter will dislodge and break up the snow which, as the snow vplow advances, will be deflected by the deflector 3l into the troughs 36 and carried upwardly and rearwardly by the screw carriers 35 to the wings 33 which dei-lect the snow in endless streams later ally toward the sides of the roadway.

From the above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

Wh-at is claimed is:

1. In a snow plow, a cutter having spirally arranged vertical blades, screw carriers diverging upwardly and rearwardly from the bottom of the cutter, an'arched deflector in rear of the cutter supporting the carriers, and means for simultaneously rotating the cutter and the carriers.

2. In a snow plow, a base plate, a vertical spiral cutter on the front of the plate, upstanding knives on the spiral body of the cutter, diverging screw carriers extending obliquely upward from the base plate in rear of the cutter, a delector on the base plate supporting the carriers and gradually increasing in height and width from the cutter to the rear end of thelbase plate, troughs on the deector housing the carriers, and means for simultaneously rotating the cutter and the carriers.

FRANK V. LESTINA.

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