Heads for string trimmers and mowers

A cutting line configured to be rotated by a machine to cut weeds, grass, or other materials, the cutting line comprising:

• a first end;
• a second end;
• and
• a node positioned between the first end and the second end along a length of the cutting line;
• wherein the first end and the second end extend away from the node, wherein the node is positioned opposite both the first end and the second end.

A cutting head assembly for an agricultural machine, wherein the cutting head assembly comprises a cutting head body configured to receive and hold one or more cutting lines, the cutting head body is rotatable about an axis, and the cutting head body comprises:

• a first opening positioned at a perimeter of the cutting head body;
• a second opening positioned at the perimeter of the cutting head body;
• a first wall positioned in the cutting head body, wherein the first wall is spaced apart from the axis and extends within the cutting head body between the first opening and the second opening to form a side of a first passageway within the cutting head body between the first opening and the second opening;
• a third opening positioned at the perimeter of the cutting head body;
• a fourth opening positioned at the perimeter of the cutting head body;
• and
• a second wall positioned in the cutting head body, wherein the second wall is spaced apart from the axis and extends within the cutting head body between the third opening and the fourth opening to form a side of a second passageway within the cutting head body between the third opening and the fourth opening.

A cutting head assembly for an agricultural machine, wherein the cutting head assembly comprises a cutting head body configured to receive a plurality of cutting lines, the cutting head body is rotatable about an axis, and the cutting head body comprises:

• a first inlet area positioned at a perimeter of the cutting head body and configured to receive a portion of a first cutting line;
• a second inlet area positioned at the perimeter of the cutting head body, wherein the second inlet area is symmetrically opposed to the first inlet area relative to the axis, and wherein the second inlet area is configured to receive a portion of a second cutting line;
• a first outlet area positioned at the perimeter of the cutting head body;
• a second outlet area positioned at the perimeter of the cutting head body, wherein the second outlet area is symmetrically opposed to the first outlet area relative to the axis;
• a first passageway extending between the first inlet area and the first outlet area;
• a second passageway extending between the second inlet area and the second outlet area;
• and
• one or more walls positioned within the cutting head body and extending within the cutting head body to form at least one of the first passageway or the second passageway.

A cutting head body for an agricultural machine, wherein the cutting head body is configured to receive a plurality of cutting lines, the cutting head body is rotatable about an axis, and the cutting head body comprises a plurality of cutting levels, wherein each cutting level comprises:

• a first inlet area configured to receive a first cutting line;
• a first cavity that opens to an exterior perimeter of the cutting head body;
• a first passageway for receiving the first cutting line between the first inlet area and the first cavity;
• a second inlet area configured to receive a second cutting line;
• a second cavity that opens to the exterior perimeter of the cutting head body;
• and
• a second passageway for receiving the second cutting line between the second inlet area and the second cavity;
• wherein the first inlet area, the first passageway, the second inlet area, and the second passageway are coplanar in a plane perpendicular to the axis.