Patent ID: 6199637
Filing Date: 2001-03-13
Classification: A01B

Abstract:
A movable implement for loosening soil below ground, comprising: a row of blades with blade holders perpendicular to a direction of motion of said implement; a supporting arm having one end articulated to each of said blades; a frame articulated to another end of said supporting arm; a connecting rod of crank means engaging said supporting arm and operating in a vertical plane parallel to said direction of motion; a blade adjustment lever with two arms mounted on said supporting arm and pivoting coaxially with an articulating shaft; a stop mounted on a downward-extending arm of said blade-adjustment lever and pointing below said articulating shaft; lever-adjusting means engaging an upward-extending arm of said blade-adjustment lever and having a variable angle to said supporting arm and varying thereby the angle of the blade to said ground; spring means forcing a blade holder for said blades against said stop; said soil exerting a resistance forcing said blades away from said stop during movement of said implement.