| 摘要 |
<p>A safety blade for a rotary lawn mower is provided herein. The blade comprises a homogeneous molded, vulcanized body of comminuted waste rubber and plastic fibers which is vulcanized about a central metallic bar with end portions extending beyond the bar. The central section including the metallic bar is formed with means for mounting the blade on the vertical drive shaft of a rotary mower. Each end portion extends beyond the metallic bar, and has a cutting edge and a lift on the opposite edge. Each end portion consists solely of the molded homogeneous body. Also disclosed is a method of making the blade. The molded vulcanized body of the blade so provided has a longer service life than such blades provided heretofore. Moreover, the cutting edges provide a better cutting effect than ?n blades heretofore provided.</p> |
