Wheel mounted earth moving scraper with pivot in center of pivot axle

Claim 1

An earth moving scraper for towing behind a tractor or the like, the scraper comprising: a scraper housing, the housing including a vertically disposed moldboard, a scraper blade mounted on the bottom of the moldboard, a pair of end plates attached to the ends of the moldboard, and an elongated tongue with one end attached to the top of and centered on the moldboard, the other end of the tongue attached to a swivel hitch, the hitch adapted for attachment to the rear of the tractor; a scraper housing frame pivotally attached to the back of the moldboard and adjacent the top edge thereof, the scraper housing frame supporting the scraper housing; a first pivot means attached to the scraper housing and the scraper housing frame and adjacent the pivotal attachment to the moldboard for raising and lowering the scraper housing above the ground surface; a pivot axle attached to the scraper housing frame; a wheel axle having a pair of wheels mounted at the ends thereof, the wheel axle parallel to and pivotally attached to the pivot axle, the pivot axle being pivotally attached to the wheel axle by a pivot pin secured to and extending through the center of the pivot axle and extending through a pin sleeve disposed in the center of the wheel axle, when the pivot axle is pivoted on the wheel axle, the pin rotating in the pin sleeve; and a second pivot means attached to the wheel axle and the pivot axle for pivoting the pivot axle, the scraper housing frame, and the scraper housing transverse to the direction of travel of the scraper.