Cordless electric grass shear having improved blade system

Details Cordless electric grass shear having improved blade system Cordless electric grass shear having improved blade system

1974-10-01

1976-05-18

Smith, Al Lawrence

Cutlery

Cutting tools

Plural cooperating blades

30221, 30DIG1, B26B 1902

Patent

active

039568245

ABSTRACT:
A battery powered grass shear having improved upper and lower shear blades with improved cutting and durability characteristics and which require less power to operate. The lower shear blade, which is fixed to the housing of the battery powered grass shear, is provided with a forwardly and upwardly extending forward portion provided with transversely spaced apart cutting teeth. The upper shear blade, which is reciprocated relative to the lower shear blade, is formed of a comparatively thin, heat treatable, resilient steel and is normally flat when in a non-stressed state. The upper blade, when assembled to the lower blade is bowed upwardly and the cutting edges of the spaced apart teeth on the upper blade intersect the cutting edges of the spaced apart teeth on the lower blade and make point to point contact throughout the length of the blade as the blades are reciprocated. The cutting surfaces are preferably heat treated to an equal hardness.

REFERENCES:
patent: 248952 (1881-11-01), Ridgway
patent: 1762401 (1930-06-01), McCloskey
patent: 2736961 (1956-03-01), Howell
patent: 3623223 (1971-11-01), Edgell

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