Power cultivator

Claim 1

Power cultivator construction including a frame, an engine mounted on the frame, sprocket mounting means attached to and extending from the frame, a first shaft rotatably mounted on the mounting means, a sprocket mounted on the first shaft, drive means between the engine and the shaft for driving the shaft and sprocket by the engine; an upper arm and a lower arm attached at one end to and extending outwardly from the mounting means to form a boom, said arms being spaced from each other, a second sprocket mounted for rotation at the outer end of the arms, an endless chain extending between and around the two sprockets, a plurality of cutting tooth means mounted on the chain at spaced intervals, chain backing means located between the arms and extending between the sprockets, the backing means including a chain bearing member having a bearing surface, at least one of the tooth means being a compound tooth having first and second working portions, and means for adjusting the second sprocket positioned to permit adjustment of the chain tension, in which the compound tooth means first portion includes an elongated portion mounted at one end upon the chain and extending in the direction of the chain travel and terminating in a point, and in which the tooth means second portion includes a curved talonshaped portion extending from and at an anglE with the elongated portion.