Solid waste processing device

• US 5,467,930 A
• Filed: 08/12/1994
• Issued: 11/21/1995
• Est. Priority Date: 10/12/1993
• Status: Expired due to Term

• Current Assignee: Lefevre Corporation
• Original Assignee: Lefevre Corporation
• Inventors: Lefevre, Mark S.
• Primary Examiner(s): Cuda, Irene
• Assistant Examiner(s): HUSAR, JOHN
• Application Number:
  US08/289,687
• Time in Patent Office: 466 Days
• Field of Search: 241/84, 241/94, 241/100, 241/82.4, 241/283, 241/606, 241/300, 241/DIG. 38
• US Class Current: 241/84
• CPC Class Codes: B02C 18/02 with reciprocating knives
• CPC Class Codes: B02C 19/0075 specially adapted for disintegrating medical waste sterilisation of refuse A61L11/00; disposal of medical waste B09B3/00
• CPC Class Codes: Y10S 241/38 Solid waste disposal

Abstract

The solid waste processing device has an infeed plate with an infeed aperture to receive material into the processing device and has a knife with a knife hole. The knife abuts the infeed plate in sliding engagement and slides between a first position which the knife hole aligns with or overlaps the infeed aperture and a second position in which the knife hole is offset from the infeed aperture. With the knife hole aligned with the infeed aperture, material is fed into the infeed aperture and the knife hole. As the knife slides relative to the infeed plate and moves the knife hole out of alignment with the infeed aperture, the material that extends into the knife hole is shorn off.

Claims

1. A solid waste material processing device comprising:

a frame;

an infeed plate connected with and fixed relative to said frame, the waste material being fed to a first side of said infeed plate, said infeed plate having a generally planar infeed surface on a second side of said infeed plate and having an infeed aperture extending through said infeed plate;

a knife blade with a generally planar knife surface that abutts said infeed surface in sliding engagement, said knife having a knife hole extending through said knife blade; and

a drive connected with said frame and operatively connected with said knife blade to slide said knife blade relative to said infeed plate, said drive positioning said knife hole in one of a first position aligned with said infeed aperture and a second position out of alignment with said infeed aperture, the waste material being shorn between said infeed plate and said knife when said drive slides said knife to said second position.

2. The device in claim 1, wherein said knife blade is one of:

a member that slides along an axis and cycles between a first position wherein said knife hole is aligned with said infeed aperture and a second position wherein said knife hole is offset from said infeed aperture; and

a rotating member that turns about a pivot and cycles between a position in which said knife hole is in alignment with said infeed aperture and another position in which said knife hole is offset from said infeed aperture.

3. The device defined in claim 2, wherein said knife hole has a sidewall defining a cutting edge between said sidewall and said knife surface and wherein said sidewall defines an acute angle with said knife surface.

4. The device defined in claim 3, wherein said knife hole sidewall defines a conic frustrom.

5. The device defined in claim 3, wherein said cutting edge is serrated.

6. The device defined in claim 3, wherein said knife hole is defined by a knife insert, said knife blade has a cooperating insert seat, and said knife insert is removably received in said insert seat.

7. The device defined in claim 6, wherein said knife hole comprises a grouping of a plurality of openings through said knife insert.

8. The device defined in claim 1, wherein said knife hole is defined by a knife insert, said knife blade has a cooperating insert seat, and said knife insert is removably received in said insert seat.

9. The device defined in claim 1, wherein said knife hole comprises a grouping of a plurality of openings through said knife blade.

10. A solid waste material processing device comprising:

a frame;

a material infeed connected with said frame, said material infeed receiving material to be processed by said material processing device;

an infeed plate connected with and fixed relative to said material infeed, said infeed plate having a generally planar infeed surface on a side of said infeed plate facing away from said material infeed and having an infeed aperture extending through said infeed plate, material received by said material infeed being fed through said material infeed and into said infeed aperture;

a knife with a generally planar knife surface that abutts said infeed surface in sliding engagement, said knife having a knife hole extending through said knife;

a material discharge connected with said frame to discharge processed solid waste from said waste material processing apparatus; and

a drive connected with said frame and operatively connected with said knife to slide said knife relative to said infeed plate, said drive positioning said knife hole in one of a first position aligned with said infeed aperture and a second position out of alignment with said infeed aperture, the waste material being shorn between said infeed plate and said knife when said drive slides said knife to said second position.

11. The device defined in claim 10, wherein said knife blade is one of:

a member that slides along an axis and cycles between a first position wherein said knife hole is aligned with said infeed aperture and a second position wherein said knife hole is offset from said infeed aperture; and

a rotating member that turns about a pivot and cycles between a position in which said knife hole is in alignment with said infeed aperture and another position in which said knife hole is offset from said infeed aperture.

12. The device defined in claim 11, wherein said knife hole has a sidewall defining a cutting edge between said sidewall and said knife surface and wherein said sidewall defines an acute angle with said knife surface.

13. The device defined in claim 12, wherein said knife hole sidewall defines a conic frustrom.

14. The device defined in claim 12, wherein said cutting edge is serrated.

15. The device defined in claim 12, wherein said knife hole is defined by a knife insert, said knife blade has a cooperating insert seat, and said knife insert is removably received in said insert seat.

16. The device defined in claim 15, wherein said knife hole comprises a grouping of a plurality of openings through said knife insert.

17. The device defined in claim 10, wherein said knife hole is defined by a knife insert, said knife blade has a cooperating insert seat, and said knife insert is removably received in said insert seat.

18. The device defined in claim 10, wherein said knife hole comprises a grouping of a plurality of openings through said knife blade.

19. A solid waste material processing device comprising:

a frame;

a material infeed connected with said frame, said material infeed receiving material to be processed by said material processing device;

an infeed plate connected with said material infeed, said infeed plate having a generally planar infeed surface on a side of said infeed plate facing away from said material infeed and having an infeed aperture extending through said infeed plate, material received by said material infeed being fed into said infeed aperture;

a knife with two generally planar, opposing knife surfaces, one of said two surfaces abutting said infeed surface in sliding engagement, said knife having a knife hole extending through said knife;

an outfeed plate with a generally planar outfeed surface abutting the other of said two generally planar, opposing knife surfaces in sliding engagement, said outfeed plate having an outfeed opening extending through said outfeed plate, material processed through said knife passing through said outfeed aperture;

a material discharge connected with said outfeed opening, said material discharge discharging processed material from said waste material processing apparatus; and

a drive connected with said frame and operatively connected with said knife to slide said knife relative to said infeed plate, said drive positioning said knife in one of a position aligned with said infeed aperture and a position offset from said infeed aperture.

20. The device defined in claim 19, wherein said knife blade is one of:

a member that slides along an axis and cycles between a first position wherein said knife hole is aligned with said infeed aperture and a second position wherein said knife hole is offset from said infeed aperture; and

a rotating member that turns about a pivot and cycles between a position in which said knife hole is in alignment with said infeed aperture and another position in Which said knife hole is offset from said infeed aperture.