SOIL OPENING

摘要

A soil opener comprises first and second soil-cutting members. The first member has a first soil-engaging surface inclined at a first angle to a perpendicular to the soil surface when viewed along a travel direction, the first angle being greater than zero, and at a second angle to the travel direction when viewed along a perpendicular, the second angle being greater than zero. The second member comprises a rotating disc and has a second soil-engaging surface that faces away from, and in a substantially opposite direction to, the first soil-engaging surface, the second soil-engaging surface being inclined at a third angle to a perpendicular when viewed along the travel direction, the third angle being greater than zero and in the same sense as the first angle.

主权项

1. A soil opener for driving through soil in a direction of travel, the soil opener comprising:
a leg having a hinge configured to permit castoring of the leg when driven through soil; first and second soil-cutting members mounted on the leg so as to be substantially coincident in the direction of travel; wherein:
the first soil-cutting member has a first soil-engaging surface inclined:
at a first angle to a perpendicular to the soil surface when viewed along the direction of travel, the first angle being greater than zero; andat a second angle to the direction of travel when viewed along a perpendicular to the soil surface, the second angle being greater than zero; andthe second soil-cutting member comprises a rotating disc and has a second soil-engaging surface that faces away from, and in a substantially opposite direction to, the first soil-engaging surface, the second soil-engaging surface being inclined:
at a third angle to a perpendicular to the soil surface when viewed along the direction of travel, the third angle being greater than zero and in the same sense as said-the first angle.