Snow Plow for Vehicles

This invention relates to a snow plow having a variable curved surface which is mounted in front of a vehicle for removing the snow.

A conventional snow plow for vehicles has a metallic rigid body structure having a predetermined curved surface, as shown in FIGS. 1 and 2.

In such a conventional snow plow having a rigid body structure, the thrust angle (the edge angle .theta..sub.1, the back angle .theta..sub.2), as shown in FIG. 3; the cutting angle .theta..sub.3, the snow throwing angle .theta..sub.4, the length L of the flat portion 5, the radius of curvature R and the height H of the curved portion 6 as shown in FIG. 4; and the size B of the snow cleaning orifice 7 as shown in FIG. 5 are all respectively invariable.

Due to the invariability of each part mentioned above the conventional snow plow can not accommodate the various, diverse environments such as the quantity and type of the snow which is to be removed, the configuration of the road, the speed of the snow removing vehicle and the atmospheric condition. Also due to invariability of the cutting angle .theta..sub.3, the breaking ability of the conventional snow plow results in inefficiency in removing the snow and/or in difficulty in breaking the snow.

Furthermore, it is difficult to select the most efficient position for removing the maximum quantity of snow and the distance for throwing the snow can be selected only by controlling the speed of the vehicle. This is particularly important if houses are situated roadside. Therefore, a conventional snow plow is very inconvenient.

An object of this invention is to solve the above-mentioned problems of the conventional snow plow.

In this invention, the above mentioned problems are solved by utilizing the following constructions. Namely, a snow plow according to the invention is mounted onto a fixing member installed in front of the snow removing vehicle, and the plow is made of material which has elastic properties. In back of the plow each set is constructed with universal joints and a hydropneumatic cylinder, and the curved surface of said snow plow can be varied into the desired configuration by telescoping said telescopical cylinders. In this invention, the vehicle is an ordinary four-wheel truck, a crawler (endless chain threads) tractor, a car on rails or others.

Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.

The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitative of the present invention, and wherein:

FIG. 1 is a front view of a conventional snow plow mounted on a snow removing vehicle;

FIG. 2 is a perspective view of the conventional snow plow;

FIG. 3 is a schematic plan view of the conventional snow plow;

FIG. 4 is a schematic side view of the conventional snow plow;

FIG. 5 is a schematic plan view of the snow cleaning orifice in the conventional snow plow;

FIG. 6 is a plan view of the snow removing vehicle with a mounted snow plow having variable curved surface of the present invention;

FIG. 7 is a side view of the essential part in accordance with the present invention;

FIG. 8 is an enlarged plan view of the essential part in accordance with the present invention;

FIG. 9A is an enlarged side view of the essential part in accordance with the present invention;

FIG. 9B is a cross-sectional view of the area indicated by circle A in FIG. 9A of the present invention;

FIG. 10 is a schematic side view of the other embodiment in accordance with the present invention; and

FIG. 11 is a front view looking along arrows XI--XI in FIG. 6.

Referring to FIGS. 6 to 11, the preferred embodiments of the snow plow according to the present invention will be hereinunder described. To the snow removing vehicle (in this embodiment a truck) 1, a fixing member 9 is mounted which is supported by a mounting device 10, and the member is attached to hydropneumatic cylinders 11 through universal joints 12, and each free end of the cylinders is attached to a snow plow 2 by means of a universal joint 12.

The reference number 8 is a bracket which is mounted onto the fixing member 9 for preventing deflective movement in a transverse direction of the hydropneumatic cylinders.

The cutting edge 4 of the snow plow 2 is made of hard metallic material etc., and the body portion thereof is made of material having predetermined elastic properties such as metal, rubber, plastic, cloth, etc. The cutting edge is screwed onto a steel plate attached under brackets for fixing the cylinders.

The fixing member 9 and the snow plow 2 are connected by means of several universal joints 12 which are aligned longitudinally and laterally therebetween.

As shown in FIG. 10, the configuration of the fixing member 9 may be preformed so as to correspond to plow 2.

When the snow plow is not in use, the plow 2 is supported and fixed onto a supporting arm (not shown) provided on the mounting device 10.

In this invention, by selectably telescoping the plurality of hydropneumatic cylinders 11, the snow to be cleared is thrown either to the right or left side as desired, and the curved surface of the snow plow may be varied into various configurations.

By varying the configuration of the snow plow 2 into various configuration, one can select the optimum configuration of the snow plow (the thrust angle, the cutting angle, the length of the flat portion, the size of the curved surface, the height, the size of the snow cleaning orifice, the snow throwing angle etc) corresponding to the environmental diversities such as the quantity and type of snow, the configuration of the road, the speed of the snow removing vehicle, atmospheric conditions, etc. Thereby, the snow throwing distance, height, etc. can be selected freely. Therefore, the snow removing operations can be performed efficiently and safely at a constant operational speed.

The snow plow of this invention can be utilized with an ordinary four-wheel truck, a crawler tractor, a car on rails etc.

The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.