Patent ID: 8061282

Claim:
A soil opening implement comprising: a frame adapted to be moved across a ground surface to be opened; a soil opener mounted on the frame for a repetitive cyclic movement to cause the soil opener to penetrate the ground at a plurality of spaced positions to form a line of holes in the soil, and means for varying the pitch of the holes, that is the spacing between adjacent holes in the direction of movement of the implement, the implement having the facility to deliver objects in the holes, either one object per hole or multiple objects per hole; the implement further comprising a hopper for holding a supply of objects and for delivering the objects to the soil opener which is in the form of a substantially vertical hollow tube through which the objects are fed and delivered to the holes; and wherein the lower end of the tube is angled and tapers to a point, the taper being formed by an angled cut on the trailing side of the opener relative to the direction of movement of the implement; the implement further comprising a cam rotatably mounted with respect to the frame, the profile of said cam being engaged by a cam follower which moves an operating lever, oscillation of which lever moves the soil opener.