Fertilizer applying knife assembly

Planting – Liquid or gas soil treatment – Hand manipulated

Patent

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Details

172719, A01C 2302

Patent

active

041321812

ABSTRACT:
A fertilizer knife assembly is capable of being connected to an agricultural implement and is operative for flow of fertilizer into a furrow opened by the knife assembly. A wear point of cast chrome alloy iron has a leading portion and a shoe portion in engagement with and secured by welding to a leading edge and a free end respectively of an elongated shank capable of being connected to an agricultural implement. An elongated fertilizer tube is positioned adjacent a trailing edge of the shank and has one end portion thereof secured to a trailing end of the shoe portion of the wear point. An elongated shield is spaced from and surrounds an exterior surface of the fertilizer tube and has opposite side edges thereof secured to the shank trailing edge by hard facing welding in a manner to protect the fertilizer tube and define an air space surrounding the same.

REFERENCES:
patent: 2598121 (1952-05-01), Hannibal
patent: 2781733 (1957-02-01), Graham
patent: 2843066 (1958-07-01), Dugan
patent: 2849970 (1958-09-01), Coberly et al.
patent: 3014293 (1961-12-01), Boatman et al.
patent: 3259087 (1966-07-01), Horton
patent: 3326152 (1967-06-01), Frantzen
patent: 3439636 (1969-04-01), Lemke
patent: 4033271 (1977-07-01), Williams et al.

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