Metal tools and implements – making – Blank or process – Cutlery
Patent
1991-07-18
1992-08-18
Parker, Roscoe V.
Metal tools and implements, making
Blank or process
Cutlery
B26B 1308, B26B 1500, A10G 304
Patent
active
051389088
ABSTRACT:
A hedge trimming tool having a fixed elongated blade mounted to the power head of the tool and a cutting blade mounted over the fixed blade and reciprocating relative to the fixed blade in the direction of the lengthwise axis. A leading side of the fixed blade has projecting fingers or teeth and the overlying portion of the cutting blade has projecting teeth that reciprocate across the openings between the fingers. The reciprocating teeth have sides configured in a complex curve forming an hour glass planar profile and an inverted U-shaped cross section. The U-shaped cross section is provideed by curving the sides of the teeth downwardly whereby the teeth sides are angularly projected through the plane defined by the bottom surface of the blade. The cutting edges along the sides are formed by grinding faces through the portions of the teeth projected below the bottom surface of the blade. The faces are formed in a single pass of the grinding implement with the faces parallel to the bottom surface of the blade.
REFERENCES:
patent: 1152531 (1915-09-01), Marshall
patent: 1644141 (1927-10-01), McArdle
patent: 3741046 (1973-06-01), Chambon
patent: 3768163 (1973-10-01), Weber et al.
patent: 4149313 (1979-04-01), Ishida
patent: 4619045 (1986-10-01), Mayer
patent: 4625610 (1986-12-01), Petrovich
patent: 4827616 (1989-05-01), Sistare
Klyzek Charles R.
Kuzarov Encho J.
Neuschwanger Kenneth E.
Raetz Kenneth P.
Blount, Inc.
Harrington Robert L.
Parker Roscoe V.
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