Cutlery – Cutting tools – With blade moving means
Patent
1984-07-31
1986-02-25
Watts, Douglas D.
Cutlery
Cutting tools
With blade moving means
30347, 56 127, B26B 700
Patent
active
045718318
ABSTRACT:
A cutting head (20) for a filament trimmer utilizing a fixed length of filament is shaped like an inverted bowl with a flange (2). A filament retainer cup (60) is attached to the concavity of head (20) and has two V-shaped slits (64) diametrically opposed. Apertures (6) in the sides of head (20) are aligned with slits (64). Bosses (36) extend outwardly from sides of bowl about half the width of flange (2) and terminate in planar faces (6). Faces (6) are inclined inwardly and upwardly and contain slots (26). Eyelets (24) are press fit into slots (26). Filament (4) is installed through eyelets and is pressed into slits (64) so free ends (5) are the same length on both sides of the head. Free ends (5) define a cutting plane when head (20) is rotating. Slits (64) impose a slight crimp in filament (4) and prevent filament (4) from moving axially when the device is in operation. Abutments (74) prevent vibrations caused by filament (4) contacting weeds and the like from migrating inwardly to retention point in slit (64), thereby preventing an excessive build-up of heat which could damage filament. Flange (2) provides a buffer to prevent filament ends (5) from being pinched or abraded between head (20) and foundations and the like. The V-shape of slits (64) allows use of various diameter filaments.
REFERENCES:
patent: 4054992 (1977-10-01), Ballas et al.
patent: 4065913 (1975-01-01), Fisher et al.
patent: 4203212 (1980-05-01), Proulx
Martin Joseph P.
The Toro Company
Watts Douglas D.
LandOfFree
Cutting head for filament trimmer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cutting head for filament trimmer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cutting head for filament trimmer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1004915