| 摘要 |
In some embodiments, a soil aeration apparatus may include aeration tines th at are actuated by a relatively compact gear system that reduces the size and weight of the apparatus. In a number of embodiments, a soil aerator may include a hinged frame assembly that cooperates with one or more weight transferring systems adapted to permit an aeration subassembly to lift off t he ground when an aeration tine impacts a hard obstacle such as a rock in the soil. In certain embodiments, an aerator may provide a shifting system adapt ed to alter the path of the aeration tines so that they do not impact the groun d surface, the shifting being effected without lifting the entire aerator from the ground surface. Some embodiments of an aerator further include an energy modulation system that is capable of relieving a shock to the gear system caused by an aeration tine impacting debris, rocks or a hardened portion in the ground.
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