| 摘要 |
A mower blade assembly for use in a rotary mower having a vertical, power-driven shaft, the assembly consisting of an elongated blade carrier rigidly secured at its midpoint to the vertical shaft for rotation therewith, and a pair of vertically offset cutting blades swingably mounted on opposite ends of the carrier. The cutting blades are swingable about axes sloping downwardly, radially inwardly, and tangentially rearwardly relative to the direction of rotation of the carrier, whereby the outer ends of the blades move upwardly to provide increased ground clearance as they are swung from an operative, radially outwardly extending position, to an inoperative, tangentially rearwardly extending position.
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