A - Human Necessities – 01 – D
Patent
A - Human Necessities
01
D
56/58
A01D 34/73 (2006.01)
Patent
CA 1093845
ABSTRACT OF THE DISCLOSURE A safety cutter blade assembly for a rotary trimmer is provided herein. It includes a circular hub formed with a central opening for mounting it on the drive shaft of a rotary trimmer and three blades intergal therewith, and extending outwardly from the hub in equiangularly spaced relation. Each blade is formed with convex cutting edges, the inner end portion of which is tangential to the hub and a comparatively short straight cutting edge on the side of the blase opposite to that having the curved cutting edge. Either of these cutting edges is adapted to be effective when it is the leading edge as determined by the direction of rotation of the trimmer drive shaft and the position of the blade assembly relative thereto. The blade assembly is of rub- ber which may be reinforced by plastic fibers or layers of fabric. The blade thus has cutting edges in its opposite sides, with one cutting edge being particularly designed to cut long grass or weeds with a negative cutting action which throws the cut foliage outwardly away from the hub and trimmer drive shaft, while the cutter edge on the opposite side of the blade is designed to cut short grass with a positive cutting action.
320197
Houle Elmer R.
Marcus & Associates
LandOfFree
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