Filament-type trimming apparatus
OwnerGoro Mutoinventor
Life of this patent
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Abstract
Disclosed herein is an improved filament-type trimming apparatus comprising a casing having base and rim portions, a spool having a hub portion and opposite flanges, at least one filament wound on the spool and a cover adapted to support the spool within the casing. The spool is adapted to be moved radially inwardly and outwardly by reason of centrifugal force generated responsive to the speed of rotation of the casing. Upon such movement, when the spool rotates independently of the casing and the cover, additional filaments are automatically fed out. The feeding of additional filaments may be stopped when the spool is in engagement with either the casing or the cover.
Claims14
In a filament-type trimming apparatus comprising a casing having a base portion and a rim portion, a spool having a hub portion and upper and lower flanges, at least one filament wound on said spool and a cover releasably mounted to the lower end of the rim portion of the casing and adapted to support the spool, the improvements comprising:
- a first engaging means for engaging the upper flange of the spool with the underside of the base portion of the casing when the spool is pressed upwardly against the action of a spring,
- a second engaging means for engaging the lower flange of the spool with the upper surface of the cover when the spool is pressed downwardly by the action of the spring, and
- a spool engaging and disengaging mechanism including a plurality of radially outwardly extending inclined ball guides in the form of a slot formed on the underside of a press member of the spool and a corresponding plurality of balls adapted to be moved along said ball guides by reason of centrifugal force generated responsive to the speed of rotation of the casing.
Dependencies are inferred from the claim text.