US 2962821 A
Description (OCR text may contain errors)
Dec. 6, 1960 Filed Nov. 3, 1958 J. PEITL 2,962,821
SNOW PLOW 3 Sheets-Sheet 1 INVENTOR: JWSZ'F TL ATTORNEYS Dec. 6, 1960 J, n- 2,962,821
SNOW PLOW Filed Nov. 3, 1958 3 Sheets-Sheet .3
INVENTOR. JOSf F P67 7.4
BY w 5 [@W d/Mm United States 2,962,821 SNOW PLOW Josef Peitl, Vienna, Austria (Wienerstrasse 49, Klosterneuburg, Austria) Filed Nov. 3, 1958, SenNo. 771,635
Claims. (Cl. 37-42) I' This invention relates to improvements in snow plows and other road clearing devices and vehicles for travelling onsnow and on a roadway, and will" be described hereinafter with particular reference to a snow plow in which. the clearing edge of the plow share is divided into's'everal sections, which are rearwardly displaceable against spring force in fiat guide pockets; the pockets for guiding the sections which form the clearing edge are connected to the plow frame and are reinforced at their front edges by a; steel rail, which is formed with slots which are aligned with. the pockets to provide a passage and guidance for the sections.
'This' steel rail is subject to heavy wear, particularly titthesldt edges. The entire steel rail must bereplaced iii' 'the case of repairs.
It is an object of the invention to provide a construction which is of higher strength than the known snow plows and can be serviced more easily. It is a special object so to design the guides for the sections forming the plow share that the latter will withstand also in' creased stresses.
The essential feature of the invention resides in that the steel rail comprises I-shaped inserts which guide the edges of the sections and consist of high-grade steel,
which inserts are connected by rail portions which form the slots and consist of steel of lower strength.
Further details of the invention will be explained with reference to the drawing, which illustrates an embodiment of the essential parts of a snow plow attached in front of a motor vehicle, for being pushed thereby in order to clear snow.
Fig. 1 is a plan view showing the snow plow. Fig. 2 is a rear view thereof. Fig. 3 is a sectional view taken on line III-III of Fig. 2. Fig. 4 is a sectional view taken on line IV-IV of Fig. 6. Fig. 5 is a sectional view taken on line V--V of Fig. 6. Fig. 6 is a sectional view taken on line VI-VI of Fig. 4 Fig. 7 is a sectional view taken on line VII-VII of Fig. 4 or 5. Fig. 8 is a perspective view of the detail of Figs. 4 to 7. Figs. 4 to 8 are enlarged relative to Figs. 1 to 3. Fig. 9 shows a detail in a further enlarged perspective view.
The snow plow 1 comprises a shareplate 2, which is forwardly concavely curved and inclined to the working direction of the plow; suitably the shareplate increases laterally in width and height. The clearing edge proper is formed by blade sections 3, which slide in guide pocket members 4 and are urged forwardly by springs 5. A slipping of the sections 3 out of the guide pocket members 4 is prevented, e.g., by screws, which are screwed into the rear ends of the sections and engage the also reinforced rear rim of the pocket. The bladelike sections 3 extend either parallel to the working direction when seen in a top plan view, as is shown in the drawing, or may extend at an acute angle to the working direction. The front rim of these pocket members 4 is particularly highly stressed because the blade-like 2,962,821 Patented Dec. 6, 1960 sections 3: will not always slide back in the pocket members 4 parallel to themselves but will be subjected to changing bending stresses which are upwardly directed if the snow plow 1 is forced downwardly against the road surface to be cleared and downwardly in normal operatibnwhen: a section strikes a fixed obstacle. To be able to take up these stresses the front rim of the pocket members 4 is reinforced by a steel rail 6, which extends throughout the length of the plow share. This steel rail comprises the end portions 25, the inserts 25 and the intermediate rail portions 26, 27. The steel rail 6. has suitably a trapezoidal shape in cross-section. The. steel rail. 6 is formed with appropriate slots '7 in alignment with the pocket members 4 to provide a passage and guidance of the bladelike sections 3.
The share plate 2 is aifixed to substantially vertical rib plates 8, which form parts of the plow frame. The rib plates 8 are appropriately inter-connected by anglesection rails 9, 10 and 1-1 to provide for :a high strengthof the plow frame. Each of the angle-section rails 10 and 11 has a plate 12 connected thereto and the two plates 12 are braced against each other by a plate 13. The plate 13 carries centering pins 17, which facilitate the connection to an appropriate counterplate 16, which is pivoted. by means of links 14 to a motor vehicle 18. The links 14 are pivoted to a plate 19, which is connected to a plate 20 affixed to the motor vehicle 18. The plates 13 and 16 and the plates 19 and 20' are connected by screws 21. The underside of the snow plow iscovered by a supporting plate 15.
To support the plow 1, slide runners 22 are afiixed to the supporting plate 15. Rollers mounted above'these slide runners 22 extend downwardly through: openings in the runners so that the plow is moved only with rolling friction on the road surface.
During operation the bladelike sections 3 are continually pushed back in the pocket members 4 and are pushed forward by the springs 5. This movement causes a high wear at the slots 7 of the steel rail 6 and particularly at the surfaces in slidable engagement with the edges 24 of the sections 3. For this reason the invention provides I-shaped inserts 25 of particularly highgrade steel in the steel rail 6. These inserts 25 are interconnected, suitably by welding, by means of intermediate rail portions 26, 27. The inserts 25 and the intermediate rail portions 26, 27 have flat contact surfaces 28 and 29, respectively. The edges of the inserts 25, however, are beveled at 30 to define with the sharp edges of the intermediate rail portions 26, 27 wedgeshaped grooves for accommodating welding seams 31. Channel-shaped end portions 25' are provided at the lateral ends of the snow plow.
The inserts 25 and the end portions 25' are not only welded to the intermediate rail portions 26, 27 but also to the share plate 2 at 32 and to the supporting plate 15 at 33. In the case of excessive wear the inserts 25 or the end portions 25' or individual ones thereof can be cut with a cutting torch from the plow at the seams 31, 32, 33 (Figs. 5 and 6) and may be replaced by new inserts or end portions.
The intermediate rail portions 26, 27, which define the slots 7 and connect the inserts 25 to each other and to the end portions 25', are not so highly stressed by the reciprocating sections 3 as the inserts and for this reason are made of material of lower strength than these inserts. The intermediate rail portions 26, 27 are connected by welded seams 34 to the rib plates 8, by welded seams 35 to the share plate 2 and by welded seams 36 to the supporting plate 2 and by welded seams 37 to the pocket members 4. These welded seams are apparent from Figs. 4 to 8, which show also the welded seam'38 connecting the share plate 2 to the rib plates 8, the welded seam 39 connecting the supporting plate 15 to the vertical ribs 8, and the welded seams 40 connecting the pocket member 4 to the rib plates.
- To faciltate the connection of the share plate 2, the plates which carry the pocket members 4, and the supporting plate 15 to the intermediate rail portions 26, 27 the latter carry extensions 41, which extend rearwardly beyond the rear ends of the inserts 25 and end portions 25 and engage them from behind. Those portions of the extensions 41 which engage the inserts 25 and end portions 25 from behind extend suitably as far as to the boundary planes of the web of the inserts or end portions 25 and 25' and, thus, as far as to the rib plates 8.
1. A snow plow comprising a plow frame, guide pocket members carried by said plow frame and having front rims, a plurality of clearing edge sections in guided engagement with said guide pocket members, resilient means tending to urge said sections forwardly out of said guide pocket members, and a steel rail arranged to reinforce said front rims and formed with slots aligned with said guide pocket members to form passages and guides for said sections, said rail comprising I-shaped inserts consisting of high-grade steel and forming side edges of said slots in engagement with said sections, intermediate rail portions of steel of lower strength, which intermediate rail portions define top and bottom edges of said slots and connect said inserts, and channel-shaped end portions at both ends of said rail, said inserts, intermediate rail portions and end portions having fiat contact surfaces and the inserts and end portions engaging said intermediate rail portions at said contact surfaces, said inserts and end portions having bevelled edges at said contact surfaces thereof and said intermediate rail portions having sharp edges at said contact surfaces thereof, which sharp edges define wedge-shaped grooves with said bevelled edges for accommodating a weld bead.
2. A snow plow as set forth in claim 1, which comprises a share plate and a bottom supporting plate, both of which are connected to the plow frame, said inserts and end portions being welded to said share plate and said supporting plate.
3. A snow plow as set forth in claim 1, in which said plow frame comprises rib plates arranged between said bladelike sections and the latter have a web equal in thickness to said rib plates.
4. A snow plow as set forth in claim 1, which comprises a share plate and a bottom supporting plate, both plates being connected to the plow frame, said plow frame comprising rib plates and carrying said pocket members, said intermediate rail portions being connected to the share plate, the supporting plate, the rib plates and the pocket members.
5. A snow plow as set forth in claim 1, which comprises a lower supporting plate, a share plate, rib plates forming parts of said plow frame, and connected to said share plate, said lower supporting plate, and pocket members, said intermediate rail portions carrying extensions to which said share plate, supporting plate and pockets are connected, said extensions extending beyond said inserts, said inserts having a web engaged by said extensions.
References Cited in the file of this patent UNITED STATES PATENTS 1,981,992 Curtis Nov. 27, 1934 2,116,351 Jones et al. May 3, 1938 2,751,831 Null June 26, 1956 2,844,416 Zaveruha July 22, 1958 FOREIGN PATENTS 173,720 Germany Jan. 26, 1953