Grader

• US 3,901,618 A
• Filed: 06/13/1974
• Issued: 08/26/1975
• Est. Priority Date: 06/13/1974
• Status: Expired due to Term

• Current Assignee: Sant'Agata, Patrick J.
• Original Assignee: Sant'Agata, Patrick J.
• Inventors: Sant'Agata, Patrick J.
• Primary Examiner(s): Stein, Mervin
• Assistant Examiner(s): Hawkins, Steven
• Application Number:
  US05/478,847
• Time in Patent Office: 439 Days
• Field of Search: 404/118,119,95 172/801,802
• US Class Current: 404/118
• CPC Class Codes: E01C 19/187 solely for spreading-out or striking-off deposited mixtures, e.g. spread-out screws, strike-off boards
• CPC Class Codes: E01C 19/42 Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating for distributing only E01C19/12; hand-actuated smoothing tools E01C19/44
• CPC Class Codes: E02F 3/7627 with the scraper blade adjustable relative to the frame about a vertical axis
• CPC Class Codes: E02F 3/815 Blades; Levelling or scarifying tools E02F3/40 takes precedence

Abstract

This specification discloses an asphalt spreader and general grader for use in combination with a hydraulic system provided by a tractor comprising a movable spreading surface or blade supported on a pair of rollers. The movable spreading and grading blade is adjustable as to its width, its level, and its angle of attack. The orientation and adjustment is accomplished by means of a hydraulic system comprised of hydraulic rams, which are operatively connected to a hydraulic unit or pump that can be provided on a tractor or other traction means. The entire unit can be kept clean by a diesel oil rinse on the rollers as well as other locations. This is provided by a single diesel tank and electric pump connected to a line with a spray nozzle operated at will by the tractor operator.

Claims

1. The combination of a traction device and a spreading apparatus comprising:

a spreading apparatus having a pair of spreading blades which axially move across each other to provide a leading main blade surface thereof which can be moved inwardly and outwardly for changing the axial length thereof and the attendant width of its Spreading capability;

a hydraulic ram attached to said blades for operatively moving said pair of blades inwardly and outwardly with respect to each other;

means connected to said hydraulic ram and said traction device to operatively drive said ram by a hydraulic source of pressure from said traction device;

a second pair of boundary edge blades each connected to the ends of said first pair of blades which provide the outer extremities and boundaries to the material being spread by the spreading apparatus;

drums connected to said apparatus for supporting said apparatus as it is being pulled by said traction device; and

, a second hydraulic ram system connected to said first pair of blades and said drums for operatively orienting said blades to the desired level at which said blades are to be moved over the surface of the material it is spreading.

2. The combination as claimed in claim 1 further comprising:

a linkage adapted to connect said traction means to said first blades in a variable angular manner for purposes of changing the angle of attack of said first pair of blades from the direction of the traction means.

3. The combination as claimed in claim 2 wherein said linkage for changing the angle of attack comprises:

a hydraulic ram attached to said first pair of blades; and

, a stationary linkage that is fixed as to its length connected to said first pair of blades and said traction device so that as said ram moves, it forms a variable angle of attack of said first blades with respect to the fixed linkage.

4. The combination as claimed in claim 3 further comprising:

a means for supplying diesel fuel to the respective rollers to free residue from the surfaces thereof.

5. The combination as claimed in claim 4 further comprising:

a tank for supplying diesel fuel to the relative moving surfaces of said first blades to remove asphalt residue.

6. The combination as claimed in claim 1 further comprising:

a single blade on the trailing surface of said apparatus for purposes of moving asphalt when the traction device which said apparatus is attached to is moved in the direction opposite from said first pair of blades.

7. The combination as claimed in claim 1 wherein:

said first pair of blades are supported in an overlying manner in a channel by roller bearings so that they can operatively move in a lateral manner inwardly and outwardly along said channel.

8. The combination as claimed in claim 7 further comprising:

a flattened surface between the first pair of blades and said trailing single blade for purposes of providing a relatively planar surface between said first blades and said trailing blade for purposes of smoothing material which is being screeded by said combination.