Tubeless fertilizer knife

• US 9,974,227 B1
• Filed: 11/23/2015
• Issued: 05/22/2018
• Est. Priority Date: 09/07/2012
• Status: Active Grant

• Current Assignee: RCB Bank (RCB Holding Co., Inc. (Oklahoma))
• Original Assignee: Shield Industries, Inc.
• Inventors: Bergmeier, Mike J, Hurlbut, Logan Deane
• Primary Examiner(s): Novosad, Christopher J.
• Application Number:
  US14/949,404
• Time in Patent Office: 911 Days
• CPC Class Codes: A01C 23/025 Continuous injection tools
• CPC Class Codes: A01C 5/062 Devices for making drills or furrows

Abstract

An improved fertilizer knife presents a leading edge, a first flexible fertilizer tube receiving portion and a second fertilizer tube receiving portion. The first and second flexible tube receiving portions are precision cast to frictionally receive the distal end of a flexible polymer fertilizer tube. The first and second flexible tube receiving portions are adapted so that the second flexible tube receiving portion can be mounted to the first flexible tube receiving portion. Both flexible tube receiving portions also each have at least one opening at their lower ends for allowing fertilizer to escape from a flexible fertilizer tube.

Claims

1. A fertilizer knife, comprising:

(a) a knife blank which has an upper portion and a lower portion, the upper portion presenting bolt holes suitable for receiving bolts for mounting the fertilizer knife to a fertilizer implement, the knife blank also having a leading edge which extends from an upper end to a lower end and a trailing edge which extends from an upper end to a lower end,

(b) at least one flexible fertilizer tube receiving portion fixed to the trailing edge of the knife blank, the at least one flexible fertilizer tube receiving portion presenting at least one tube channel which is suitable for receiving a flexible polymer fertilizer tube of a type which conveys liquid fertilizer, at least a portion of the at least one flexible fertilizer tube receiving portion extending to the lower portion of the knife blank adjacent to the lower end of the trailing edge and at least a portion of the at least one tube channel being fashioned to receive and frictionally register with a flexible polymer fertilizer tube in order to retain a flexible polymer fertilizer tube when the fertilizer knife is in operation, the at least one flexible fertilizer tube receiving portion having a lower end, the lower end of the at least one flexible fertilizer tube receiving portion presenting at least one opening which is adjacent to the lower end of the trailing edge which is suitable for allowing liquid fertilizer to escape from the flexible polymer fertilizer tube.

2. The fertilizer knife of claim 1, further comprising;

a second flexible fertilizer tube receiving portion which is able to be fixed at least indirectly to the knife blank and which is able to be mounted behind the at least one flexible fertilizer tube receiving portion, the second flexible fertilizer tube receiving portion presenting at least one tube channel including at least a portion which is able to frictionally register with a second flexible fertilizer tube, the at least one tube channel also having a lower end which presents at least one opening to allow liquid fertilizer to escape from a second flexible fertilizer tube, the lower end the at least one tube channel of the second fertilizer tube receiving portion being located adjacent to the lower end of the trailing edge of the knife blank.

3. The fertilizer knife of claim 2, wherein;

the second flexible fertilizer tube receiving portion is able to be removably mounted to the at least one flexible fertilizer tube receiving portion.