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US 8,757,283 B2Granted
Aerator
OwnerElmer A. Wesselinventor
Life of this patent
Estimating the term…
Abstract
The aerator features a rotatable tine assembly so as to avoid obstacles or aid in the extrication of the aerator therefrom. The tine assembly includes a plurality of tines mounted about a crank shaft and projecting through said retractor plate. Each tine rod passes between two rollers, one serving as a fulcrum is mounted directly on the retractor plate while the other is mounted upon a spring arm that biases the tine rod as far as possible into a forward position. The aerator is driven by the tines used to puncture the ground.
Claims7
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.
7 more elements
Dependencies are inferred from the claim text.