Abstract: A towable earth working apparatus for landscaping, leveling, grading, cutting and for spreading dirt, sand, gravel, is hitched by a trailer arm to a vehicle such as a small tractor or pickup truck. The apparatus has a grader secured to a trailer having a carriage frame with a wheel support assembly attached to a pivot attachment mechanism. The wheel support assembly supports laterally spaced wheels about a journal axis. A wheel support actuator is connected to the journal axis for transmitting actuator movement to the wheel support assembly, where the wheels pivot in both angular directions about the journal axis, to raise and lower the wheels relative to the grader, changing the grader's height. The angular inclination of the grader relative to a reference plane, and consequently the angular inclination of a cutting blade mounted on the grader, is still further adjusted by a pivot attachment actuator, such as a turnbuckle, of the pivot attachment mechanism.

Abstract: A front-end mounted earth working apparatus for a vehicle, including a skid steer, forms the subject of this invention. The earth working apparatus has a guide frame portion and grading portion. The guide frame portion is attached to the skid steer by a mounting plate. The mounting plate has a lifting fork extending forward therefrom being substantially horizontal. The grading portion is suspended below the guide frame portion by the lifting fork using a suspension mechanism. The grading portion being substantially parallel to the lifting fork. The grading portion further having front and rear blades attached to side rails. The rear blades being attached below the side rails by being pivotably hinged at one end and selectively secured to a corresponding adjustment plate so that the angle of each rear blade is adjustable.

Abstract: A bulldozer and backhoe locking device for prevention of theft of heavy equipment having hydraulic pistons and cylinders by locking the blade or bucket against the ground by placement of an elongated sleeve pivoted together along one edge over the extended piston rod for engagement against the end of the piston and cylinder assembly and the boom of the backhoe or the blade of the bulldozer.