Earth working – Rolling – rotating or orbitally moving tool – Tool has circumferentially spaced teeth – tines – blades or...
Reexamination Certificate
2011-05-17
2011-05-17
Pezzuto, Robert E (Department: 3671)
Earth working
Rolling, rotating or orbitally moving tool
Tool has circumferentially spaced teeth, tines, blades or...
C172S701000
Reexamination Certificate
active
07942210
ABSTRACT:
In lieu of rigid bars, a tillage reel utilizes a number of elongated flexible elements such as lengths of link chain that are spaced circumferentially around the reel and extend axially thereof. The flexible elements bow outwardly by centrifugal force as the reel rolls along the ground during tillage operations to impact and fracture clods encountered at the lower front extremity of the reel. When the reel is used in connection with strip till operations, the flexible elements bow upwardly and inwardly along the lower periphery of the reel as they engage and conform to the transverse cross-section of the strip till berm, thereby avoiding destruction of the berm notwithstanding the clod-pulverizing action provided by the flexible elements.
REFERENCES:
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patent: 5797460 (1998-08-01), Parker et al.
patent: 6068061 (2000-05-01), Smith et al.
patent: 6681868 (2004-01-01), Kovach et al.
patent: 7065945 (2006-06-01), Hurtis
patent: 7156186 (2007-01-01), Knobloch et al.
Hovey & Williams, LLP
Krause Corporation
Pezzuto Robert E
LandOfFree
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