US 12,213,404 B2
Metal rod blade and trimmer head utilizing same
Alexis M. Pierides, Strovolos (CY)
Appl. No. 18/692,231
Filed by Alexis M. Pierides, Strovolos (CY)
PCT Filed May 5, 2022, PCT No. PCT/US2022/027800
§ 371(c)(1), (2) Date Mar. 14, 2024,
PCT Pub. No. WO2023/043499, PCT Pub. Date Mar. 23, 2023.
Claims priority of provisional application 63/243,746, filed on Sep. 14, 2021.
Prior Publication US 2024/0415053 A1, Dec. 19, 2024
Int. Cl. A01D 34/73 (2006.01); A01D 101/00 (2006.01)
CPC A01D 34/73 (2013.01) [A01D 2101/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A head assembly for trimming grass and brush in a rotating manner,
the head assembly comprising:
a trimmer head, a main section of which is configured as an inverted cup with a top section in the shape of a disk and a wall section, having an annular shape, arranged around a periphery of the top section, wherein the wall section comprises at least one passage that extends through the wall section, from an origin at an internal socket on an inside of the wall section and a terminus in a predominantly circular opening on an exterior of the wall section, wherein the predominantly circular opening has additional material removed on the outer side on each of a trailing edge and a trailing upper side, as defined by an intended direction of rotation of the trimmer head;
for each opening, a corresponding blade assembly, each blade assembly comprising a single length of a solid rod, with a sphere attached to an end of the solid rod, the sphere having a diameter that is larger than a diameter of the solid rod, such that when the blade assembly is inserted through the passage from the inside of the trimmer head, the solid rod extends through and radially beyond the circular opening and the socket receives the sphere, and
a plurality of spring-loaded retainers, each retainer having a spring section and a retaining section, each retainer removably or permanently positioned in the inside of the wall section for the retaining section thereof to compress the sphere of one of the blade assemblies into the corresponding socket, using spring force from the spring section thereof.