Filament type trimmer

Details Filament type trimmer Filament type trimmer

1980-01-10

1981-03-03

Peters, Jimmy C.

Cutlery

Cutting tools

With blade moving means

56 127, A01D 5000

Patent

active

042532388

ABSTRACT:
In a filament type trimmer a filament is wound on a storage spool in a rotating housing and exits through an opening in a rim portion of the housing. When the extending portion of the filament is rotating freely, it extends approximately radially from the housing. However, when it hits a relatively stationary object, it is deflected rearwardly so as to extend approximately tangentially from the housing. To avoid high stresses in the exiting portion of the filament, the exit opening is inclined rearwardly so that when the filament is deflected rearwardly by striking an object, it extends in a tangential line off of the spool, thereby avoiding bending stresses at the exit opening.

REFERENCES:
patent: 2533619 (1950-12-01), Pokras
patent: 4054992 (1977-10-01), Ballas et al.
patent: 4062114 (1977-12-01), Luick
patent: 4134204 (1979-01-01), Perdue
patent: 4169311 (1979-10-01), Evenson et al.

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