A - Human Necessities – 01 – G
Patent
A - Human Necessities
01
G
56/58, 30/63
A01G 3/04 (2006.01) A01D 34/73 (2006.01) B23D 61/02 (2006.01)
Patent
CA 1106192
ABSTRACT OF THE DISCLOSURE A novel rotary blade for pruning machines is provided herein. The rotary disc-type blade comprises a disc portion and a cutting blade portion. The cutting blade portion includes a plurality of cutting blades projecting radially from the periphery of the disc portion. The disc por- tion and the cutting blade portion are each made of a particularly recited flexible, high molecular weight, elastomeric material. A mounting hole is disposed in the center of the disc portion and a rigid core member is embedded in the elastomer surrounding the mounting hole. The diameter of the core member is 1/3 to 1/2 that of the diameter of the rotary blade. A plurality of buffering holes is disposed along the periphery of the disc portion along the radii connecting the center of the disc portion with the body of each cutting blade portion. The rotary blade has good tensile strength, good tear resistance, good abrasion resistance, good light stubby lity and good flexibility and will give far less shock to the operator when compared with known bar-type blades, when the blades collide with a rigid obstacle. This shock is also substantially reduced by providing a plurality of holes along the periphery of the disc portion or supporting member of the blade. Because of the extraordinary high speed of rotation, up to 6,000 rpm, even if the first blade which contacts a rigid stalk of weed is bent, the next blade instantly contacts the stalk damaged by the first blade body and, consequently, smoothly cuts down the stalk with little shock being transferred to the operator.
331890
Marcus & Associates
Onoue Toshikatsu
LandOfFree
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