Patent ID: 6854526
Filing Date: 2005-02-15
Classification: A01B,B62D

Abstract:
1. A walk-behind agricultural working machine comprising: a machine body having a front section and a rear section; an axle mounted on the rear section of the machine body for undergoing rotation; a wheel mounted on the axle for undergoing rotation therewith to move the walk-behind agricultural working machine along a ground surface selectively in a forward direction and in a reverse direction; a cultivator device mounted on the machine body and forwardly of the axle; a working device attachment removably connected to the rear section of the machine body; and a connection mechanism disposed on the rear section of the machine body and rearwardly of the axle for removably connecting the working device attachment to the rear section of the machine body, the connection mechanism having upper and lower links each pivotally connected at a first end portion thereof to the rear section of the machine body and at a second end portion thereof to the working device attachment; wherein when the working device attachment is connected to the machine body and both the working device attachment and the wheel are disposed in contact with the ground surface prior to initiation of desired agricultural work, the first end portions of the upper and lower links disposed closer to the ground surface than the second end portions of the upper and lower links so that when the wheel undergoes rotation and the walk-behind agricultural working machine moves in the forward direction to pull the working device attachment forwardly along the ground surface, a forward and downward traction force is produced in each of the upper and lower links along a longitudinal axis thereof, whereby the working device attachment gradually sinks into the ground surface due to its own weight and to a vertically downward component of the traction force.