US1550574A - Truck snowplow - Google Patents

Description

D. A. SARGENT TRUCK SNOWPLOW Aug. 18, 1925. 1,550,574

Filed Oct. 25 1924 INVENTOR I/ 6 3 nd 7 v AaA'r roRNEYs Patented Aug. 18, 1925.

. UNITED STATES 1,550,514 PATENT OFFICE.

DON A. SABGENT, OF BANGOR, MAINE, ASSIGHOB TO=NORTHERN TRAILER COMPANY,

0 or BANGOR, MAINE, A eoaroaAmoN or u mn TRUCK SNOWPLOW.

Y Application filed October as, 1924., Serial No. 745,760.

T 0 all whom it may concern:

' Be it known that I, DON A. SARGENT, a citizen of the United States, residing at Bangor, in the county of Penobscot, State of Maine, hme invented certain new/and useful Improvements in Truck Snowplows; and I do hereby declare the following to be a 'full, clear, and exact description' of the invention, such as will enable others skilled in the art to which'it appertains to make and use the same.

This inventionrelates to improvements in truck snow plows.

.In my Patent No. 1,502,591 I have described and claimed a snow plow designed to be secured toa motor truck. This plow comprises a frame, made be clamped to the axle of the truck, upon the forward end of which a V-shaped noseis loosely mounted for slight up and down movement. A pair of adjustable wings are carried by the frame and pivotally -mounted behind the nose. When not in use, the nose is swung back upon the forward end of the frame and the wings removed. Such plows are excellently adapted for light work but do not operate so efficiently in heavy snows. One reason for this is found in the fact that no means are provided for changing the vertical tion of the nose to regulate'the depth 0 the cut.

It is, therefore, one of the objects of the present invention to provide means for varying the elevation of the nose of the plow above the ground so that it can be adjusted for cuts of different depths; I have attained this object by mounting the nose of the plow for vertical adjustment upon a frame supported upon runners, and by making a flexible connect-ion between the plow and the forward end of the truck in all positions of vertical adjustment in such a manner as to permit the necessary rising and falling movement of the nose as the plow passes over uneven ground. It is a further object ofthe present Invention to design a truck snow plow adapted for heavy duty, and in general, to improve upon the plows of this ty e.

In the accompanying drawings, I have illustrated certain preferred embodiments of the invention, the study of which will make the principles involved clear. In these drawings: Figure 1 is a plan view of my improved plow in position on a motor truck,

the truck being illustrated in outline only; Figure 2 is a vertical section taken on line 2-2 of Figure 1 with the truck removed; Figure 3 is a detail view showing the manner in which the nose makes sliding contact with the uprights of the supporting frame; Figure 4 is a vertical section taken along line 4-4 of Figure 1 andshowing one method whereby a flexible connection can be made between the forward end of the truck and the plow; and Figure 5 is a fragmentary plan view showing alternative means for making this flexible connection between the plow andhthe truck.

The plow illustrated in these' drawings has a V-shaped nose 1 braced internally by means of cross bars 2 and a pair of 'triangular braces 3 just behind the point of the nose. At its rear ends it carries pivotally mounted wings 4. This noseand its two associated wings are connected to the forward end ofa truck 5 and designed to be pushed thereby. They are not, however, supported by the truck but by a separate frame which forms a part of the plow itself. I shall now describethis frame and the manner in which the nose and its wings are adjustably supported upon it.

This supporting frame for the nose comprises three wide, fiat runners 6, one forward and two rear, designed to give am 1e support for the plow on most snows. e-

cured to each of these runners is a pair of angle irons 7 which form upright uideways upon which the nose can he slid. A shaft 8 is journaled in the upper ends of the uprights on the two rear runners and constitutes an upper connecting member of the supporting frame. This frame is completed by means of two cross pieces 9 secured at their forward ends to the uprights on the forward runner and supported at their rear ends by the shaft 8. A series of lates 11 are bolted to the cross bars 2 an the triangular braces 3 of the nose in such manner as to embrace the forward and transverse flanges ofthe uprights 7 and make a sliding contact therewith. In this manner the nose is slidably mounted for vertical adjustment upon the frame s'u ported by the runners 6. I shall now describe the mechanism for effecting this ad'ustment. Three. chains 12 are bolted to t e shaft 8 at one end and fixed to the plates 11 at the other, the middle no chain extending forward between-the two cross pieces 9 and over a sheave l3 journaled between the upper ends of the forward uprights 7. The rotation of the shaft 8 is cffected by means of a ratchet mechanism mounted upon one end thereof. This mechanism comprises a ratchet wheel H fixed upon the shaft. a loosely mounted lever 15 carrying a pawl 16. and a fixed pawl 17 mounted upon oneof the uprights 7. By means of the well understood oscillatory movement of the lever 15,-the entire nose and its associated wings are raised and lowered upon the uprights T and held in any desired elevation.

I shall now describe the manner in which the plow is attached to the forward end of the-truck. referring first to that means illustrated in Figures 1 and 4. To the forward end of the truck chassis is bolted a channel iron 18 with its two flanges extending forwardly. A pair of arms 19 securely bolted to the cross bat-s2 of the nose extend rearwardly and are designed to enter the space between the flanges of the channel 18. There they are held 'by means of bolts 21 which pass through the flanges of the channel and through eyes 22 in the arms 19. These eyes 22 are somewhat larger than the bolts 21 and are cut with flaring ends. .-\s a result of this construction, the nose can swing relative to the truck as the plow passes over uneven ground without causing binding of any of the parts. The space between the flanges of the channel determines the range of vertical adjustment of the nose.

This distance can, however, be made ade-- quate so that within a practical working range the flexible connection between the plow and the truck is maintained in all positions of vertical adjustment of the nose.

The connecting means illustrated in Figure 5 comprises a frame 23 clamped to the forward axle of the truck. The arms 19 are flexibly connected to this frame by means of a pair of pivoted connecting links 24: which can be adjusted to cpnform to the vertical adjustment of the nose.

The wings 4 are pivoted upon and behind the sides of the nose for horizontal movement at 25 and for vertical movement at 26. By virtue of the pivotal connection 26 the swinging movement of the nose does not affect the position of the wings. The lateral position of the wings is fixed my means of adjustable side braces or arms 27, and the vertical position by means of chains 28 secured at their upper ends to the truck.

\Vit-h a vertically adjustable nose, it is possible to vary the depth of the snow to be cut and thus to plow in a series of cuts a fall which might otherwise be too heavy for a truck plow. By mounting the nose of the plow upon a runner supported frame, it is not necessary to carry any of the weight of the plow on the truck itself. This is advantageous. The connection between the truck and the plow is 'a flexible one. and permits the plow to adapt itself to inequalities in the ground traversed without subjecting the. truck to undue strain, and this flexible connection obtains throughout all positions of vertical adjustment of the plow.

I claim:

1. In a snow plow designed to be driven by a motor truck, the combination of a nose, a frame comprising runners and uprights supported by the runners, plates carried by th nose and making sliding engagement with the uprights, means for exerting simultaneous pull on the plates to move the nose along the uprights while remaining parallel to its initial position, means for holding the nest In any desired position of vertical adjustment. and means for flexibly connecting the plow with the forward end of the truck in all positions of vertical adjustment.

2. In a snow plow designed to be driven by a motor truck, the combination of a nose, a frame comprising runners, uprights supported by the runners, and a shaft journaled in the uprights. plates carried by the nose and making sliding engagement with the uprights, chains fixed to the shaft and secured to the plates, and pawl and ratchet mechanism for rotating the shaft to raise and lower the nose on the uprights.

In testimony whereof I afiix my signature.

DON A. SARGrENT.

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