The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 2026
Filed:
Mar. 31, 2021
Husqvarna Ab, Huskvarna, SE;
Stefan Kullberg, Jönköping, SE;
Daniel Alexandersson, Huskvarna, SE;
Joakim Grundberg, Huskvarna, SE;
HUSQVARNA AB, Huskvarna, SE;
Abstract
A trimmer head includes a rotatable housing connectable to a trimmer line spool rotatably supported by the housing and a locking mechanism for locking the trimmer line spool to the housing with a locking force. The locking mechanism is arranged to be moved from a locked to an unlocked position when a rotation speed of the trimmer head is increased above an operating speed. The increased rotation speed causes a releasing force greater than the locking force. In the unlocked position, the locking mechanism releases the trimmer line spool from the housing such that the trimmer line spool is movable and a trimmer line spooled around the spool is released and pulled out by a centrifugal force caused by the rotation of the trimmer head, allowing feed of the trimmer line.