US 12,408,573 B1
Vertical tiller
Richard B. Sears, San Rafael, CA (US)
Filed by Richard B. Sears, San Rafael, CA (US)
Filed on Aug. 5, 2022, as Appl. No. 17/882,220.
Claims priority of provisional application 63/229,733, filed on Aug. 5, 2021.
Int. Cl. A01B 33/06 (2006.01); A01C 5/02 (2006.01); E21B 11/00 (2006.01)
CPC A01B 33/06 (2013.01) [A01C 5/02 (2013.01); E21B 11/005 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A system (100) for mixing soil while protecting underlying weed fabric, the system comprising:
a) a tiller assembly comprising a helix (220) the helix comprising a plurality of wings (230) with each wing comprising a first vertical return (237) attached to an outer edge (222) of the helix, the first vertical return also attached to a cambered transition (235) with the cambered transition attached to a sweeping distal edge (232) with the sweeping distal edge attached to a normal edge (243) with the normal edge attached to a second vertical return (239) with the second vertical return attached to the outer edge of the helix;
b) the helix further comprising a turned leading wing (250) the turned leading wing disposed at the lowest end of the helix, the turned leading wing comprising a distal edge piece (255) in angled attachment to the turned leading wing; and
c) the tiller assembly centrally attached to a shaft (210) the shaft having an inferior end centrally attached to a rider disc (300) the rider disc comprising a outer circular wall (330) and a lower circular surface (320).