| 摘要 |
IMPROVEMENTS IN OR RELATING TO VEGETATION CUTTERS A device for cutting vegetation comprises a housing rotatable about an axis; a rotatable spool within the housing storing a supply of flexible line having an end extending through an aperture in the housing into a cutting plane normal to said axis; and means for causing relative rotation between said spool and said housing whenever the length of line extending into said cutting plane is less than a predetermined length, to cause additional line to be fed into said cutting plane. The means for causing relative rotation between the spool and the housing comprises a series of angularly-spaced locking faces C provided on the spool for on a member connected thereto) or on the housing; a balance bar pivotally mounted on the housing or on the spool, said balance bar having a member for engagement with said locking faces. The centre of gravity of said balance bar is on the side of the pivot point opposite from said member means are provided tending to direct said member onto said locking faces. In an alternative embodiment, the means for directing the member onto the locking faces, positively engages said member onto said locking faces, and the centre of gravity of said balance bar is preferably on the side of the pivot point opposite said member for engagement with said locking faces.
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