Fertilizer applying knife assembly

• US 4,132,181 A
• Filed: 05/23/1977
• Issued: 01/02/1979
• Est. Priority Date: 05/23/1977
• Status: Expired due to Term

• Current Assignee: Ace Service Incorporated
• Original Assignee: Ace Service Incorporated
• Inventors: Heiniger, Richard, Smith, Donald D., Davis, Otis L. III
• Primary Examiner(s): Burr, Edgar S.
• Assistant Examiner(s): Feyrer, James R.
• Application Number:
  US05/799,393
• Time in Patent Office: 589 Days
• Field of Search: 111/6, 111/7, 111/86, 172/699, 172/719, 172/724, 172/745, 172/76, 37/141 R, 37/142 R, 37/193
• US Class Current: 111/123
• CPC Class Codes: A01C 23/025 Continuous injection tools

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.

Claims

1. A fertilizer applying knife assembly comprising:

(a) an elongated shank capable of being connected to an agricultural implement and having a leading edge and a trailing edge, said shank being a planar member of steel and having opposite side surfaces and a face end;

(b) a wear point of cast high chrome alloy iron and having a leading portion in engagement with said shank leading edge and a shoe portion in engagement with said shank free end;

(c) said wear point leading portion and shoe portion having a thickness greater than the thickness of said shank;

(d) said wear point leading portion and shoe portion being welded along the length thereof to said shank leading edge and free end respectively with the greater thickness of the wear point portions protecting said welds;

(e) an elongated fertilizer tube spaced from and in trailing relation to said shank trailing edge and having one end portion with discharge ports adjacent said wear point shoe, said fertilizer tube having a transverse dimension less than the thickness of the shank; and

(f) an elongated shield in trailing relation to said shank trailing edge and secured thereto by welding, said shield and shank defining an elongated enclosure for said fertilizer tube extending to adjacent the discharge ports thereof.

2. A fertilizer applying knife assembly comprising:

(a) an elongated shank capable of being connected to an agricultural implement and having a leading edge and a trailing edge, said shank having a free end;

(b) a wear point of cast high chrome alloy iron having a leading portion in engagement with said shank leading edge and a shoe portion in engagement with said shank free end both being secured by welding thereto, said wear point shoe portion having a trailing end portion wider than a leading portion thereof, said trailing end portion having a downwardly and rearwardly opening notch forming lateral wings;

(c) an elongated fertilizer tube spaced from and in trailing relation with said shank trailing edge and having an end of one end portion thereof downwardly into said notch below said wings, said fertilizer tube one end portion having discharge ports therein located in said notch for outwardly flow of fertilizer therefrom, said fertilizer tube having a transverse dimension less than a thickness of said shank; and

(d) an elongated shield spaced from an exterior surface of and surrounding said fertilizer tube and having opposite side portions thereof secured to said shank trailing edge in a manner to define an air space surrounding said fertilizer tube, said shield having one end thereof substantially engaging said trailing end of said wear point shoe portion so that said fertilizer tube discharge ports are operative for flow of fertilizer into a furrow opened by said wear point.

3. A fertilizer applying knife assembly as set forth in claim 2 wherein:

(a) said shank is a planar member having opposite side surfaces;

(b) said shield is generally tubular with a diameter not greater than the thickness of the shank and engages a trailing edge of said shank; and

(c) said shield being secured to said shank by respective hard facing welds each extending along the length of and rearwardly from said shank opposite side surfaces to sides of said shield whereby said shield is protected by the thickness of said hard facing welds.

4. A fertilizer applying knife assembly as set forth in claim 3 wherein:

(a) said wear point leading portion and shoe portion have a thickness greater than a thickness of said shank; and

(b) said wear point leading portion and shoe portion are welded along the length thereof to said shank leading edge and free end respectively whereby the welds are protected by the greater thickness of said wear point.

5. A fertilizer applying knife assembly comprising:

(a) an elongated shank capable of being connected to an agricultural implement and having a leading edge and a trailing edge, said shank having a free end, said shank being a planar member having opposite side surfaces;

(b) a wear point having a leading portion in engagement with said shank leading edge and a shoe portion in engagement with said shank free end and secured by welding thereto;

(c) an elongated fertilizer tube adjacent said shank trailing edge and having one end portion thereof secured to said wear point shoe portion, said fertilizer tube having discharge ports in said one end portion thereof for outwardly flow of fertilizer therefrom;

(d) an elongated shield spaced from an exterior surface of and surrounding said fertilizer tube and having opposite side portions thereof secured to said shank trailing edge in a manner to define an air space surrounding said fertilizer tube, said shield having one end thereof spaced from said wear point shoe portion so that said fertilizer tube discharge ports are operative for flow of fertilizer into a furrow opened by said wear point;

(e) said shield being tubular with a diameter not greater than the width of the shank and engaging a trailing edge of said shank; and

(f) said shield being secured to said shank by respective hard facing welds each extending along the length of and rearwardly from adjacent said shank opposite side surfaces to sides of said shield whereby said shield is protected by the thickness of said hard facing welds.

6. A fertilizer applying knife assembly comprising:

(a) an elongated shank capable of being connected to an agricultural implement and having a leading edge and a trailing edge, said shank having a free end, said shank being a planar member having opposite side surfaces;

(b) a wear point having a leading portion in engagement with said shank leading edge and a shoe portion in engagement with said shank free end and secured by welding thereto, said wear point leading portion and shoe portion have a thickness greater than a thickness of said shank;

(c) said wear point leading portion and shoe portion being welded along the length thereof to said opposite side surfaces adjacent said shank leading edge and free end respectively whereby the welds are protected by the greater thickness of said wear point portions;

(d) an elongated fertilizer tube adjacent said shank trailing edge and having one end portion thereof secured to said wear point shoe portion, said fertilizer tube having discharge ports in said one end portion thereof for outwardly flow of fertilizer therefrom;

(e) an elongated shield spaced from an exterior surface of and surrounding said fertilizer tube and having opposite side portions thereof secured to said shank trailing edge in a manner to define an air space surrounding said fertilizer tube, said shield having one end thereof spaced from said wear point shoe portion so that said fertilizer tube discharge ports are operative for flow of fertilizer into a furrow opened by said wear point;

(f) said shield being generally tubular with a diameter less than the thickness of the shank and engages a trailing edge of said shank; and

(g) said shield being secured to said shank by respective hard facing welds each extending along the length of and rearwardly from adjacent said shank opposite side surfaces to sides of said shield whereby said shield is protected by the thickness of said hard facing welds.

7. A fertilizer applying knife assembly as set forth in claim 6 wherein:

(a) said wear point shoe portion diverges outwardly and rearwardly and has a trailing end with a downwardly and rearwardly opening notch forming lateral wings and a central groove above said notch;

(b) said fertilizer tube one end portion is received within said wear point groove and the end thereof extends below the wings for protection thereby; and

(c) said fertilizer tube being secured to said shield adjacent said one end portion.