Lawn-aerating machine

Claim 1

An aerating machine comprising a chassis, wheels mounting said chassis for movement over the ground, a first handle for guiding said chassis, a transmission case, guide means for mounting said case for reciprocating substantially vertical movement relative to said chassis, a prime mover on said case, a plurality of drills depending from said case, drive means in said case connected to said prime mover to rotate each said drill, lowering means for lowering said case relative to said chassis, said drills entering the soil below said chassis as said case is lowered, and resilient means biasing said case upward relative to said chassis, said chassis having an upward extending guide formed with an elongated vertical slot and said chassis having a slide with a pin extending through said slot and which further comprises a second handle having a lever attached to said pin and means pivotally mounting said second handle on said chassis extending generally parallel to said first handle, a plurality of shafts rotatably mounted in said case, each driven by said drive means, and means for attaching one said drill to each said shaft, a gear on each said shaft, each said gear meshing with at least two adjacent gears and means for rotating one said shaft from said prime mover.