Patent ID: 6904979

Claim:
An apparatus for earth working and ground leveling, comprising: a trailer having a hitching assembly; a grader secured to the trailer, the grader having a front, a rear and at least two rear blades, each rear blade supported on a hinge for attachment to a corresponding adjustment plate for adjustable angular positioning about the hinge; the trailer further including a carriage frame secured to the grader, the carriage frame including a wheel support assembly having a lateral directed axis, laterally spaced wheels supported on the wheel support and spaced therefrom for providing ground support for the apparatus, the wheel support assembly further comprising laterally spaced arms supporting the wheels, a journal and a jack shaft aligned with the axis, the jack shaft being secured to the arms and supported on the journal at a position spaced from the wheels and above the rear blades of the grader, for pivoting movement about the axis, a first actuator having a first end, a second end secured to the jack shaft and a length for producing a first actuating movement for pivoting the wheels about the axis in response to movement of the first actuator, so that pivoting movement of the jack shaft raises and lowers the wheels relative to the grader; a second actuator having an adjustable length and being secured for producing a second actuating movement for angularly positioning the front of the grader; and a mechanism connecting the first actuator and second actuator.