Excavating – Processes
Patent
1979-11-13
1981-08-11
Eickholt, E. H.
Excavating
Processes
37 43R, 172540, E01M 500
Patent
active
042826667
ABSTRACT:
Method and apparatus for breaking hard snow such as has been thawed and later frozen, and having glazed top surface and consisting of a solid mass to a substantial depth. The apparatus for performing that method includes a plurality of spiders or wheels having spikes or teeth that are generally radial. The device is drawn along an area in which the snow is to be broken, such as a ski trail, the spiders rolling as the device is moved therealong, and the teeth penetrating into the snow, digging out and removing portions of the hard snow, forming a top layer of loose snow and a bottom layer of hard snow as part of the original solid mass and forming holes or pits in the surface of the bottom layer. The top layer of loose snow includes chunks and these are later crushed at least partially, such as by a roller, rolling thereover, reducing the size of the chunks and forming at least a portion of fine snow. The holes are in the neighborhood of 2" to 4" wide at the top, and spaced apart a distance about twice that dimension, and of a depth similar to their width.
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"Rolling Cultivator," Owner's Manuel Model 2000, Lilliston Implement Co. pp. 1-11, 3-20-65.
"Rolling Cultivator," Parts Book Model 2000, Lilliston Implement Co. pp. 1-25, 3-20-65.
Eickholt E. H.
Gallagher Paul H.
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