CONTROL OF FEED OF TRIMMER LINE

CONTROL OF FEED OF TRIMMER LINE

A trimmer head (1) comprises a rotatable housing (12) connectable to a trimmer line spool (13) rotatably supported by said housing (12) and a locking mechanism (14) for locking the trimmer line spool (13) to the housing (12) with a locking force (FL). The locking mechanism (14) is arranged to be mov...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Kullberg, Stefan, Grundberg, Joakim, Alexandersson, Daniel
Format: Patent
Sprache:eng
Schlagworte:
AGRICULTURE
ANIMAL HUSBANDRY
FISHING
FORESTRY
HARVESTING
HUMAN NECESSITIES
HUNTING
MOWING
TRAPPING
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Beschreibung
Zusammenfassung:A trimmer head (1) comprises a rotatable housing (12) connectable to a trimmer line spool (13) rotatably supported by said housing (12) and a locking mechanism (14) for locking the trimmer line spool (13) to the housing (12) with a locking force (FL). The locking mechanism (14) is arranged to be moved from a locked to an unlocked position when a rotation speed of the trimmer head (1) is increased above an operating speed. The increased rotation speed causes a releasing force (FR) greater than the locking force (FL). In the unlocked position, the locking mechanism (14) releases the trimmer line spool (13) from the housing (12) such that the trimmer line spool (13) is movable and a trimmer line (3) spooled around the spool (13) is released and pulled out by a centrifugal force (Fc) caused by the rotation of the trimmer head (1), allowing feed of the trimmer line (3).