Patent ID: 8757283

Claim:
An aerator comprising: a. a crank shaft; b. a plurality of tines pivotably attached to the crank shaft in operable order, each tine further comprising a tine rod; c. a retractor plate, further comprising a plurality of parallel slots; d. a plurality of spring arms, each one pivotably mounted at a pivot point in front of each of the plurality of slots and biased in an upward orientation each spring arm further comprising; i. a frame; ii. a fulcrum roller mounted within one end of the frame and located about the pivot point; and iii. a bias roller mounted within an end of the frame opposite the fulcrum roller; e. each tine rod passing through one spring arm, between the fulcrum roller and bias roller such that the bias roller is behind the tine rod, and likewise each tine rod passing through a slot on the retractor plate; wherein the spring arm constantly urges the tine rod forward, above and toward the fulcrum roller.