Road grader/spreader

• US 7,686,537 B2
• Filed: 04/05/2006
• Issued: 03/30/2010
• Est. Priority Date: 04/05/2006
• Status: Expired due to Fees

• Current Assignee: Myron L. Mullett
• Original Assignee: Myron L. Mullett
• Inventors: Mullett, Myron L.
• Primary Examiner(s): Pezzuto; Robert E
• Assistant Examiner(s): Troutman; Matthew D
• Application Number:
  US11/397,399
• Publication Number:
  US 20070235202A1
• Time in Patent Office: 1,455 Days
• Field of Search: 172/788, 172/799.5, 172/253, 172/810, 172/811, 404/104, 404/105, 404/110, 404/101, 404/96, 372/70, 372/71, 372/74, 372/81
• US Class Current: 404/101
• CPC Class Codes: E02F 3/7618 with the scraper blade adjustable relative to the pivoting arms about a horizontal axis
• CPC Class Codes: E02F 3/8157 Shock absorbers; Supports, e.g. skids, rollers; Devices for compensating wear-and-tear, or the like
• CPC Class Codes: E02F 3/962 Mounting of implements directly on tools already attached to the machine E02F3/404 and E02F3/8152 take precedence

Abstract

A road grader comprising an elongated grader blade adapted to be pushed by a vehicle such as a bulldozer and having mutually parallel side members attached to the lateral ends of the blade perpendicularly to the blade'"'"'s longitudinal axis, each of said side members comprising a pair of spaced apart walls that house a slidable mounting plate on the lower end of which is attached a ground contacting skid. Each slidable mounting plate is separately actuated to move upwardly or downwardly with respect to the side member in which it is housed. Relative upward or downward movement of the side member, with respect to the ground contacting skid, results in lowering or elevating the respective ends of the grader blade with respect to the level of the respective ground contacting skid. Separately adjusting the height of the lateral ends of the grader blade and driving the blade by a pushing vehicle permits the precision depth application of a layer of road material at any desired angle or tilt.

Claims

1. A road grader mounted to a bulldozer blade and being pushed by a bulldozer comprising:

the bulldozer having the bulldozer blade,

an elongated grader blade having a horizontal longitudinal axis and front and back sides with lateral ends, the elongated grader blade mounted to the bulldozer blade, wherein the elongated grader blade is pushed by the bulldozer,

two mutually parallel side members attached to the respective lateral ends of the grader blade perpendicularly to the grader blade'"'"'s longitudinal axis, each of said side members comprising a pair of spaced apart walls,

a mounting plate having a lower edge and being slidably disposed between the spaced apart walls in each side member,

ground contacting skids riding on a base grade each having forward and rear ends and a longitudinal axis, said skids attached respectively to the lower edges of the mounting plates where the longitudinal axis of each skid is perpendicularly oriented to the longitudinal axis of the grader blade,

reciprocating means interconnecting each side member with its respective mounting plate ground contacting skid for moving the mounting plate and skid up and down within the side member,

at least two rearwardly extending brackets disposed on the back side of the grader blade for supporting the bulldozer blade, and

at least one adjustable length pressure rod extending rearwardly from the back side of the grader blade in contact with a front surface of the bulldozer blade thereby defining a pitch of the grader blade.

2. The assembly of claim 1 and further including a plow plate attached to the forward end of each skid and disposed at an angle to the longitudinal axis of the skid.

3. The assembly of claim 2 and further including stabilizing means interconnecting each side member with its respective reciprocating means skid.

4. A road grading blade assembly mounted to a bulldozer blade and being pushed by a bulldozer comprising,

the bulldozer having the bulldozer blade,

a grader blade having lateral ends and having a plurality of rearward protruding brackets disposed on the back side of the grader blade on which the bulldozer blade sits,

a pair of screws disposed on the back side of the grader blade in contact with a front surface of the bulldozer blade, defining a pitch of the grader blade,

housing means secured to each lateral end of the grader blade for holding a sliding plate member,

a sliding plate having a bottom edge and disposed within each of the housing means for up and down slidable movement therein,

a ground contacting skid riding on a base grade having forward and rear ends and attached to the bottom edge of each sliding plate,

hydraulic piston and cylinder means interconnecting each housing and its respective sliding plate/skid combination for providing up and down movement of the skid, wherein the grader blade is pushed by the bulldozer.

5. The combination of claim 4 and further including,

a tubular sleeve attached to each of said lateral housing means,

an elongated insert having a bottom end and slidably disposed within each of the tubular sleeves, said bottom end of the insert being attached to the skid associated with the housing means.

6. The combination of claim 4 and further including, a plow plate angularly attached to the forward end of each skid.

7. The combination of claim 4 and further including, a depth gauge comprising,

a cylindrical tube attached to at least one of the housing means, and

a depth indicator rod having upper and lower ends and slidably disposed within the cylindrical tube where the lower end of the rod is connected to the skid associated with the housing means.

8. A road grading blade assembly mounted to a bulldozer blade and being pushed by a bulldozer comprising,

the bulldozer having the bulldozer blade,

a grader blade having lateral ends and having a plurality of rearward protruding brackets disposed on the back side of the grader blade on which the front blade sits,

a pair of screws disposed on the back side of the grader blade in contact with a front surface of the bulldozer blade, defining a pitch of the grader blade,

an enclosure attached to each of the lateral ends of the grader blade,

a plate slidably disposed within each of said enclosures, said plates each having a bottom edge,

a ground contacting skid riding on a base grade attached to the bottom edge of each plate, said skid having forward and rearward ends,

a plow plate angularly disposed on the forward end of each skid, and hydraulic piston means interconnecting each of the enclosures with its respective skid for raising and lowering the skid, wherein the grader blade is pushed by the bulldozer.