US 12,114,596 B2
Trimmer head and trimmer
Stefan Kullberg, Jönköping (SE)
Assigned to HUSQVARNA AB, Huskvarna (SE)
Appl. No. 16/967,044
Filed by HUSQVARNA AB, Huskvarna (SE)
PCT Filed Jan. 21, 2019, PCT No. PCT/EP2019/051326
§ 371(c)(1), (2) Date Aug. 3, 2020,
PCT Pub. No. WO2019/154610, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 1850147-8 (SE), filed on Feb. 12, 2018.
Prior Publication US 2021/0037704 A1, Feb. 11, 2021
Int. Cl. A01D 34/416 (2006.01)
CPC A01D 34/4163 (2013.01) [A01D 34/4162 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A trimmer head arranged to be driven around a rotational axis, via an interface, to rotate a trimmer line, wherein the trimmer head comprises:
a housing,
the interface,
a trimmer line spool, and
an automatic feed mechanism,
wherein the automatic feed mechanism is configured to release the trimmer line spooled around the trimmer line spool when the trimmer head is subjected to a change in a rotational speed, via the interface, at a higher rate than a threshold rate of the change in the rotational speed,
wherein the trimmer head further comprises an actuator connected to the automatic feed mechanism such that a manual actuation of the actuator releases the trimmer line spooled around the trimmer line spool, and
wherein the actuator is displaceable between a first position, in which the automatic feed mechanism locks the trimmer line, and a second position in which the automatic feed mechanism releases the trimmer line, and wherein the actuator is biased towards the first position.