| 摘要 |
A lawn mower blade mounted coaxially at the bottom of a vertical engine drive shaft is normally de-clutched from the shaft and stopped by a brake. When the engine is accelerated, the blade is released by the brake and clutched by a centrifugal clutch to the engine driven shaft. The blade carrier and clutch and brake drum are included in a compact assembly on a hub and mounted as a unit on the engine shaft. To replace the flywheel effect normally provided by a blade fixedly mounted on the engine shaft, the unitary assembly also includes a flywheel mounted on the hub. The assembly and flywheel are protected from blade cuttings by a protective bowl shaped to surround the flywheel and form a mounting platform for a brake band about the drum.
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