| 摘要 |
<p>DITCHER HEAD ASSEMBLY AND METHOD OF CLEANING DITCHES ( ) A ditcher head assembly adapted for mounting on a tractor which moves with the tractor along the berm of a highway so that the ditcher head assembly clears earth and debris in a propellor-like action from the side of a ditch and throws it laterally either off the highway or onto the berm. With the ditcher head assembly of this invention it is possible to control the placement of earth and debris. The ditcher head is rotated axially of the ditch so that each incremental portion of earth in a ditch is engaged by a cutting blade. The ditcher head assembly is mounted on a tractor by means of a stand and outrigger members and extends over the berm of a highway, having the capacity to elevate and depress. The tractor is of regulation road width when in traveling position. The ditch head assembly is hydraulically controlled for positioning off the highway to a reasonable ditch depth. Hydraulic protection is also provided the ditcher head should it meet with an obstruction in its path.</p> |
