Trimmer for vegetation, cutting head and spool therefor

Details Trimmer for vegetation, cutting head and spool therefor Trimmer for vegetation, cutting head and spool therefor

B - Operations, Transporting

26

D

146/3

B26D 1/12 (2006.01) A01D 34/416 (2006.01)

Patent

CA 1185148

ABSTRACT Trimmer for vegetation, cutting head and spool therefor A bump-feed monofilament string trimmer has a sleeve- like escapement member (52) axially slidable on a drive member (42) and nested in a spool member (66) which holds a coil (71) of cutting filament. Axially downwardly extending fingers (84) of the escapement member (52) engage in window-like slots (92) in a downwardly extending dome-like protrusion (16) of the spool member (66) to prevent relative rotation between the two members (52, 66) The fingers (84) have external screw threaded portions (86) which extend through the slots (92) and are engaged by a nut (18) which releasably secures the spool member (66) to the escapement member (52). The driving member has teeth (88) which normally drivingly engage with an upper series of internal clutch teeth (58) of the escape- ment member, and temporarily engage with a lower series of clutch teeth (102, 104) when the dome-like protrusion (16) is"bumped" on the ground, whereby discrete lengths of cutting filament axe let out from the spool member (66).

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