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US 6,470,661 B1Granted
Mowing blade with star
AssigneeMTD Products Inc
InventorGerhard Plamper
Life of this patent
Estimating the term…
Abstract
A shape for the central drive hole of a rotary mowing blade, such shape including two pairs of teeth extending off of a central hole substantially displaced 30° from the central axis of the mowing blade.
Claims10
An interconnection shape for a mower blade having a bottom surface and a central drive hole for use with a rotating shaft having a key shape with teeth,
- the interconnection shape comprising key slots, said key slots extending outward off of the drive hole,
- said key slots having at least one straight edge side profile, said straight edge side profile being angled at an angle of 15-25° in respect to the center line of the key slots, said side profile directly interconnecting the shaft to the blade passing torque therebetween respectively,
- a blade bell support, said blade bell support engaging the bottom surface of the mower blade and means to connect said blade bell support to the rotating shaft.
Dependencies are inferred from the claim text.