US3533175A

US3533175A - Snow plow

Info

Publication number: US3533175A
Application number: US774249A
Authority: US
Inventors: William A Snyder
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-11-08
Filing date: 1968-11-08
Publication date: 1970-10-13
Anticipated expiration: 1987-10-13

Description

Oct. 13, 1970 w. A. SNYDER 3,533,175

SNOW PLOW Filed Nov. 8, 1968 [.YVEYTOR. WILLIAM A- SNYDER United States Patent O 3,533,175 SNOW PLOW William A. Snyder, Rte. 1, Box 1493, Sandy, Oreg. 97055 Filed Nov. 8, 1968, Ser. No. 774,249 Int. Cl. E01h /04 US. Cl. 37-44 5 Claims ABSTRACT OF THE DISCLOSURE A snow plow, which I call a snow blazer provided with two vertical mold-boards and a mechanism for moving these boards between a first closed position at which in the horizontal plane a V shaped structure is formed and a second open position at which the boards as viewed in the horizontal plane are parallel. The plow in its first position is driven vertex forward into a snow drift or the like. The plow is then placed into its second position to push the snow outward and away from the plow.

SUMMARY OF THE INVENTION My plow employs a frame which in the horizontal plane defines an isosceles triangle. Each of the mold-boards is disposed adjacent one of the legs of the frame. Each of the mold-boards is hingedly secured to a corresponding end of the base member of the frame. Two hydraulic cylinders have plungers, one plunger being connected to one board, the other plunger to the other. The cylinders are operated together. When the plungers are withdrawn, the boards are pulled in contact with the legs to define the closed position. When the plungers are extended, the boards are extended parallel in the second position.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a top plan view of my plow as shown with closed mold-boards;

FIG. 2 is a view similar to FIG. 1 but showing the mold-boards in open position;

FIG. 3 is a detail perspective view of the nose portion of my plow in closed position;

FIG. 4 is a cross section taken along line 4-4 in FIG. 1;

FIG. 5 is a view similar to FIG. 3 but showing the nose portion in open position;

FIG. 6 is a view of the left side of the edge plate of my plow as viewed from the inside; and

FIG. 7 is a cross section taken along 77 in FIG. 1.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to FIGS. 1-7 a vertically disposed left mold-board 10 has a curved nosepiece 12 cooperating with a straight mating nose piece 14 of a vertically disposed right mold-board 16. Both mold-boards have outwardly curved top edges 18 to guide snow away from the plow.

A vertical horizontally extending heavy edge plate 20 extends from the midpoint of a transverse horizontal member 22 forward.

Horizontal members

24 and 26 which are of like length define a horizontal isosceles triangular frame with member 22 and extend between opposite ends of members 22 to opposite sides of plate 20. A mounting channel 28 extends to the vertex of

members

24 and 26 Patented Oct. 13, 1970 being connected thereto by pin 30 and having a transverse element 32 passing through opening 34 in plate 20. Channel 28 is also disposed in cage 36 which permits the up and down movement of the channel when the plow is in use.

Mold-board hinges 38 secure opposite ends of member 22 to the corresponding mold-

boards

10 and 16. Member 22 also supports left links 40.

An adjustable stabilizer bar link 42 is disposed on top of the structure.

A pivot anchor 44 is held by plate 20 and supports one end of

hydraulic cylinders

46 and 48. Cylinder 46 has a plunger 50 connected to mold-board 10. Cylinder 48 has a plunger 52 connected to mold-board 16.

When the cylinders are actuated to force out the plungers, the mold-boards are extended outward and parallel to force the snow outward; when the cylinders are actuated to withdraw the plungers, the mold-boards are brought together to form a V.

The nosepiece 12 is curved to prevent snow from wedging the mold-boards apart when the plow is in motion. In use, if the snow-drift is too large or deep to break through and the vehicle operating the plow stalls, the cylinders are actuated to open the mold-boards and force the snow outward and away from the plow. The vehicle is then backed out, the mold-boards are closed, and another approach is made. This repeated action enables the plow to penetrate and enable breakthrough. The vehicle can be backed out with the mold-boards open, since they will not catch on the snow.

While I have described my invention with particular reference to the drawings, such as not to be considered as limiting its actual scope.

Having thus described this invention, what is asserted as new is:

1. A snow plow comprising:

a frame which in the horizontal plane defines an isosceles triangle having two legs and a base;

first and second mold-boards lying in vertical planes and having matable nose pieces, each mold-board being disposed adjacent the outside of a corresponding s;

first means hingedly securing each mold-board to a corresponding one of the ends of the base; and second means connected to said mold-boards, said second means having a first position at which the moldboards are pulled along side of the corresponding legs and said nose pieces meet whereby said moldboards, in the horizontal plane, define a V, said second means having a second position at which, in the horizontal plane, said mold-boards, are pushed outward and are parallel to each other.

2. A snow plow as set forth in claim 1 wherein said second means includes first and second hydraulic cylinders, each cylinder having a plunger secured to a corresponding mold-board, said plungers being withdrawn or extended together, said plungers being extended to define the second position and being withdrawn to define the first position.

3. A snow plow as set forth in claim 2 further including a vertical plate extending across and through said frame from the midpoint of the base through the angle formed between the legs.

4. A snOW plow as set forth in claim 3 wherein a portion of said plate extends between the nose pieces when the second means is in the first position.

3 5. A snow plow as set forth in claim 4 wherein one 3,431,661 3/1969 Carlson.

d d h t ht. nose plece 1s curve an t e other 1s s ra1g ROBERT E. PULFREY Primary Examiner References Cited E. H. EICKHOLT, Assistant Examiner UNITED STATES PATENTS 5 US Cl XR 1,889,667 11/1932 Klauer. 3736;172-805