Earth working – With drive means for tool or cleaner – With obstruction feeling device for moving or releasing...
Patent
1979-10-12
1982-11-16
Shapiro, Paul E.
Earth working
With drive means for tool or cleaner
With obstruction feeling device for moving or releasing...
172 58, 172108, 172117, 172484, 172527, 172532, A01B 900, A01B 3304, A01B 3310, A01B 63118
Patent
active
043591019
ABSTRACT:
This invention relates to an auger and to a plow including such auger. This specification discloses an auger which is suitable for use even in the difficult terrain encountered in typical reforestation operations. An auger in accordance with this disclosure has its axis extending in the direction of movement of the plow and is arranged to rotate in a direction opposing the forward movement of the plow. The auger has a plurality of generally helical turns. Sections of the ground engaging portions around the periphery of the turns have an angle of attack in a plane at a selected angle to the axis of the auger and other sections have angles of attack in planes at a different angle. These ground engaging sections of the periphery are preferably teeth which because of the difference in angles discussed above attack the ground at different cutting angles. The dislodged earth will as is normal with an auger be flung sideways as a furrough is formed, but it will also have a component of motion which is either forward or backwards in relation to the direction of travel of the plow. When, as previously explained the auger is rotating to oppose the direction of the plow, this forward or backward component of motion will depend on the rate of forward movement of the plow less the rearward displacement of particles relative to the auger shaft. While the net effect of the auger is to resist forward motion, selected sections may have an opposite pitch or orientation and those limited sections would have the opposite effect.
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