Patent ID: 7536792
Filing Date: 2009-05-26
Classification: A01D

Abstract:
1. A line trimming head comprising: (a) a housing; (b) a central support fixed within the housing; (c) an cylindrical metallic tube diametrically fixed within the housing and forming a continuous circumferential passage for a trimming line; (d) the cylindrical metallic tube avoiding the central support and forming at least one blade slot; (e) the cylindrical metallic tube further having a first exit port and a second exit port; (f) the first exit port forming a first convex surface of revolution about a central axis of the cylindrical metallic tube; (g) the second exit port forming a second convex surface of revolution about the central axis of the cylindrical metallic tube; (h) a gripper movable between a first position and a second position; (i) the first position allowing the admittance of the trimming line through the cylindrical metallic tube; (j) the second position providing for holding the trimming line in the cylindrical metallic tube; (k) the gripper having at least one locking blade extending into the at least one blade slot, the locking blade having a clamp hole adjacent the circumferential passage; (l) the locking blade cooperating with the cylindrical metallic tube to hold the trimming line when the gripper is in the second position; (m) the housing further comprises a bottom portion and a top portion; (n) the bottom portion including an integrally formed arcuate counterweight extending into the top portion; (o) the integrally formed arcuate counterweight positioned adjacent the central support and generally opposite the cylindrical metallic tube; (p) cylindrical metallic tube further comprises a generally rectangular cartridge having a first angled section, a guide section and a second angled section integrally formed and further forming a continuous guide channel; (q) the first angled section having a first blade slot generally perpendicular to the guide channel; and, (r) the second angled section having a second blade slot generally perpendicular to the guide channel.