(under the class definition) Apparatus for treating earth covered with grass by making a slit or small hole therein so as to either aerate the earth, remove a plug of grass and soil, or merely pierce sod, with a minimum of disturbance of the adjacent earth.
(1) Note. The apparatus found in this subclass is not limited to any specific type of structure but is usually disclosed as being intended to perform the aforementioned aerating and/or plug-removing function.
(2) Note. Apparatus which could incidently be used to perform this function is not included herein, unless the aerating and/or plug-removal of lawns is disclosed as an intended use of the apparatus.
SEE OR SEARCH THIS CLASS, SUBCLASS:
91+, for cyclically driven carriers which have, movably mounted thereon, hole forming earth-working teeth, blades, or like projections, but which teeth, blades, or projections tear at and snag the soil in working it.
118+, for devices, other than lawn aerators or plug-removers, driven about a horizontal transverse axis.
540+, for roller devices, other than lawn aerators or plug removers, with teeth which make holes in the ground.
SEE OR SEARCH CLASS 56, Harvesters,
226, for standing grain gatherers with bat members having a vertical movement similar to aerator projections; and subclass 249 for mowers with rollers having aerating devices.
89+, for devices for making a cavity in the earth and depositing material in the cavity; and subclass 99 for hand implements for forming a cavity other than a furrow in the ground to receive material.
175, Boring or Penetrating the Earth, appropriate subclasses for devices for boring holes in the earth.