US 6,308,785 B1 · Adjustable grader-spreader bar

Abstract

An adjustable grader-spreader bar with a three-point hitch has a blade frame assembly comprised of a plurality of blade frames, each blade frame having a blade edge fastened at the bottom. The blade frames are slideably connected so that the blade frames have an adjustable overlap. Actuating devices, such as hydraulic rams, are used to extend or retract the blade frames, so that the width of the of the adjustable grader-spreader bar may either be increased or decreased as required for the particular application. Ground engaging skids are attached to each side of the blade frame assembly. The vertical position of each ground engaging skid may be adjusted to raise or lower each side of the adjustable grader-spreader bar. Actuating devices, such as electrical motors, are used to change the vertical position of the ground engaging skids.

Claims23

Dependent claims

A towable adjustable grader-spreader bar for use on a ground surface comprising:

(a) a blade frame assembly, oriented transverse to the direction of travel of the grader-spreader bar, the blade frame assembly comprising a plurality of blade frames;
(b) a plurality of blade edges, such that a blade edge is fastened to the bottom of each blade frame;
(c) means for slideably connecting adjacent blade frames to one another so that the blade frames have an adjustable overlap with respect to one another;
(d) actuating means for sliding the blade frames to change the total width of the adjustable grader-spreader bar;
(e) a left ground engaging skid attached to the left side of the blade frame assembly;
(f) a right ground engaging skid attached to the right side of the blade frame assembly;
and
(g) hitching means for connecting the grader-spreader bar to a towing vehicle.

5 more elements

A towable adjustable grader-spreader bar for use on a ground surface comprising:

(a) a blade frame assembly, oriented transverse to the direction of travel of the grader-spreader bar, the blade frame assembly comprising a left blade frame, a right blade frame, and a center blade frame;
(b) a left blade edge fastened to the bottom of the left blade frame, a right blade edge fastened to the bottom of the right blade frame, and a center blade edge attached to the center blade frame;
(c) means for slideably connecting the left blade frame to the center blade frame so that the overlap between the left blade frame and the center blade frame is adjustable;
(d) means for slideably connecting the right blade frame to the center blade frame so that the overlap between the right blade frame and the center blade frame is adjustable;
(e) actuating means for sliding the left blade frame to adjust the overlap between the left blade frame and the center blade frame;
(f) actuating means for sliding the right blade frame to adjust the overlap between the right blade frame and the center blade frame;
(g) a left ground engaging skid attached to the left blade frame;
(h) a right ground engaging skid attached to the right blade frame;
and
(i) hitching means for connecting the grader-spreader bar to a towing vehicle.

7 more elements

A towable adjustable grader-spreader bar for use on a ground surface comprising:

(a) a blade frame assembly, oriented transverse to the direction of travel of the grader-spreader bar, the blade frame assembly comprising a left blade frame, a right blade frame, and a center blade frame;
a blade frame assembly comprising a left blade frame, a center blade frame, a right blade frame;
(b) a left blade edge fastened to the bottom of the left blade frame, a right blade edge fastened to the bottom of the right blade frame, and a center blade edge attached to the center blade frame;
(c) a left front stabilizer overlappingly connecting the front of the left blade frame to the front of the center blade frame;
(d) a left upper rear stabilizer overlappingly connecting the upper rear of the left blade frame to the upper rear of the center blade frame;
(e) a left lower rear stabilizer overlappingly connecting the lower rear of the left blade frame to the lower rear of the center blade frame;
(f) a right front stabilizer overlappingly connecting the front of the right blade frame to the front of the center blade frame;
(g) a right upper rear stabilizer overlappingly connecting the upper rear of the right blade frame to the upper rear of the center blade frame;
(h) a right lower rear stabilizer overlappingly connecting the lower rear of the right blade frame to the lower rear of the center blade frame;
(i) a left hydraulic actuating ram for sliding the left blade frame;
(j) a right hydraulic actuating ram for sliding the right blade frame;
(k) a left ground engaging skid attached to the left blade frame;
(l) a right ground engaging skid attached to the right blade frame;
and
(m) a three-point hitch assembly attached to the front of the center blade frame for connecting the grader-spreader bar to towing means.

12 more elements

A towable adjustable grader-spreader bar for use on a ground surface comprising:

(a) a blade frame assembly, oriented transverse to the direction of travel of the grader-spreader bar, comprising a left blade frame, a center blade frame, a right blade frame;
(b) a left blade edge fastened to the bottom of the left blade frame, a right blade edge fastened to the bottom of the right blade frame, and a center blade edge attached to the center blade frame;
(c) a left front stabilizer overlappingly connecting the front of the left blade frame to the front of the center blade frame;
(d) a left upper rear stabilizer overlappingly connecting the upper rear of the left blade frame to the upper rear of the center blade frame;
(e) a left lower rear stabilizer overlappingly connecting the lower rear of the left blade frame to the lower rear of the center blade frame;
(f) a right front stabilizer overlappingly connecting the front of the right blade frame to the front of the center blade frame;
(g) a right upper rear stabilizer overlappingly connecting the upper rear of the right blade frame to the upper rear of the center blade frame;
(h) a right lower rear stabilizer overlappingly connecting the lower rear of the right blade frame to the lower rear of the center blade frame;
(i) a left hydraulic actuating ram for sliding the left blade frame;
(j) a right hydraulic actuating ram for sliding the right blade frame;
(k) rolling means attached to the left blade frame;
(l) rolling means attached to the right blade frame;
and
(m) a three-point hitch assembly attached to the front of the center blade frame for connecting the grader-spreader bar to towing means.

11 more elements

Dependencies are inferred from the claim text.

Adjustable grader-spreader bar

Life of this patent

Adjustable grader-spreader bar

Life of this patent

Abstract

Claims23