Patent ID: 7044070

Claim:
A seed drill, comprising: a frame; a walking beam suspended from the frame and pivotable about a first pivot point; a spring member connecting the walking beam to the frame and movably biasing the walking beam downward relative to the frame; a first disk and a second disk rotatably mounted to opposite ends of the walking beam and positioned adjacent one another, the first and the second disks being positioned on opposite sides of the first pivot point; and an arm member having a first portion pivotably attached to the walking beam at the first pivot point and a second portion pivotably attached to the frame at a second pivot point, wherein pivotal movement of the walking beam about the first pivot point causes upward movement of one of the first and second disks and downward movement of the other of the first and second disks relative to the first pivot point, and further wherein pivotal movement of the arm member about the second pivot point causes vertical displacement of the walking beam relative to the frame.