| 摘要 |
The blade is made of flat stock, is elongated with a series of the teeth formed along one elongated arcuate edge, the tips of the cutting teeth being disposed along a circular arc. The blade is adapted to be inserted within an elongated slit made in the cylindrical wall of the mower rotor with the teeth protruding from the rotor. The leading end of each blade is provided with an inwardly facing step adapted to rest on the cylindrical wall at the corresponding end of the slit. The trailing end of the blade has a notch to receive the rotor wall at the other end of the slit. The blade has a hole to receive a rod, extending within the rotor and carried by the latter to maintain the blade in position. Each blade has a boss protruding from a main face to prevent the blade from slipping within the rotor. The slit faces are inclined with respect to the rotational axis of the rotor, so as to maintain the blade in an inclined position, to more fully expose the successive teeth for better cutting efficiency. The trailing end of the blade is wider than its leading end to prevent an object from directly impacting against the leading end of a downstream blade.
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