Abstract: A window for a grain trailer, having an oval-shaped stem with a perimeter to fit within a hole of a grain trailer having similar size and shape, the perimeter substantially uniform throughout a length of the window, an integrally-formed flange on one end of the stem, the flange having a perimeter that extends outwardly from the perimeter of the stem, a groove adjacent an end of the window and having a perimeter that extends inwardly from the perimeter of the stem. a bracket to fit within the groove and against an inside wall of the grain trailer to prevent the window from sliding out of the grain trailer, a compressible seal against a surface of the flange that faces toward the groove and seals the hole of the grain trailer such that dust and other particles cannot ingress into an interior of the grain trailer.

Abstract: The tub is mounted to a frame for alternative movement from a position wherein the tub is centrally located with respect to the longitudinal axis of the frame. The tub may be tilted from a position centrally located to a side dump position which is offset with respect to the longitudinal axis of the frame. The apparatus for moving the tub from its centrally located position to its side dump position is a barrel pivotally mounted to the tub and an extension rod which is pivotally mounted to the frame.

Abstract: A method wherein a hole is made in the ground having the depth intended for a diaphragm, the hole being a narrow cylindrical cavity. Into this cavity is successively inserted a drill head including at least one ejection element having its axis aimed in a direction transverse to the axis of the cavity. The head is connected by means of a one-piece flexible tube to elements which supply the substance to be used for reinforcing and waterproofing the ground under pressure to the ejection element. The reinforcing substance is discharged through the ejection element at the same time that the head is drawn toward the surface, the axis of the ejection element being maintained in its oriented position in a controlled manner in a plane perpendicular to the axis of the cavity to form a diaphragm.

Abstract: A wire roller includes a wire receiving spool rotatably supported on a frame adapted for support on a vehicle. The power means for rotating the spool includes an electric motor supported on the frame and coacting drive means on the motor and spool for rotating the spool in response to operation of the electric motor. The frame may be supported on a vehicle by a clamp assembly including a pair of coacting clamp jaws which are pivotally connected together by an adjustable connection for accommodating bumpers of various dimensions. A torque applicator is operatively associated with one clamp jaw for pivotally moving said clamp jaws into clamping engagement on a vehicle bumper.