Patent ID: 11925139
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC A | IPC A

Claim 4:
5. A device for cutting grass, the device permanently installed in soil, the device comprising:
a housing;
the housing installed by being buried within the soil;
the housing includes internal threads;

a cutting head;
the cutting head having a first position and a second position:
the first position being the cutting head within the housing, awaiting activation;
the second position being the cutting head extended out of the housing, ready to cut grass;

a cutting head shaft;
the cutting head shaft within the housing;
rotation of the cutting head shaft causing rotation that creates upward movement along the internal threads of the housing, thus causing operation of the cutting head;

a motor;
the motor rotating to cause the cutting head to move from the first position to the second position;

an ascender;
the ascender internally splined to interact with external splines of the cutting head shaft;
the ascender externally threaded to interface with the internal threads of the housing;
rotation of the cutting head shaft causing rotation of the ascender, in turn causing extension or retraction of the cutting head;

whereby the ascender interacts with the housing to convert rotational motion of the cutting head shaft into upward and downward movement of the cutting head; and
whereby the device for cutting grass is installed in areas where conventional mowing is difficult.