Patent ID: 6196329
Filing Date: 2001-03-06
Classification: A01B

Abstract:
In an apparatus hating a mobile support frame and a plurality of harrow type teeth apparatus with each tooth apparatus forming a pair of harrow type teeth at its ends with coiled portions intermediate its ends biasing the teeth in a forward direction and enabling the teeth to spring back forward to their unbiased position after being flexed significantly rearward as a result of encountering an obstacle in the ground and flexing rearward and then being freed of the load of the obstacle, a dampening coil comprising a steel rod having coiled intermediate portions and projecting ends with the ends being attachable about the harrow type teeth, said dampening coil being adapted to be mounted adjacent the harrow type teeth with the coiled portion biased in a forward direction opposite the direction of biasing of the pair of harrow type teeth, said dampening coil having its attachable ends drawable forward when attached to the harrow type teeth so as to urge the harrow type teeth rearward, said harrow type teeth halving a significantly stronger forward bias than the bias of the dampening coil rearward in the opposite direction so that the harrow type teeth, when under load by the dampening coil the dampening coil load alone will be insufficient to move the harrow teeth rearward, so that the harrow type teeth when freed of the obstacle will spring back forward to substantially their normal position under no load with the dampening coil attachment to the harrow type teeth acting only to slow or dampen the forward return movement of the harrow type teeth to their normal position.