Medical waste disposal apparatus

• US 5,340,039 A
• Filed: 10/12/1993
• Issued: 08/23/1994
• 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): Rosenbaum, Mark
• Assistant Examiner(s): HUSAR, JOHN
• Application Number:
  US08/134,279
• Time in Patent Office: 315 Days
• Field of Search: 241/283, 241/606, 241/100, 241/84, 241/94
• 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 241/606 Medical/surgical waste comminution

Abstract

The medical waste disposer has a frame and a receiving chamber connected with the frame. The receiving chamber has a discharge port and an anvil is connected with the receiving chamber adjacent the discharge port. The anvil has an anvil aperture extending through the anvil and aligned with the discharge port. A knife abuts and slides against the anvil along an axis. A knife hole extends through the knife. An assembly plate abuts the knife in sliding engagement to sandwich the knife between the anvil and the assembly plate. The assembly plate also has an opening extending through the plate. A drive is operatively connected with the knife to slide the knife. The knife slides between a first position in which the knife hole overlaps the anvil aperture and a second in which the knife hole is offset from the anvil aperture and overlaps the assembly plate opening. Each of the knife and the assembly plate may have a second hole or opening, spaced along the axis from the first hole or opening. Further, multiple knives and assembly plates may be stacked one upon the other to provide repeated, sequential cutting. The thickness of each knife may be sized progressively thinner to provide smaller cuttings and a desired mutilation of the waste being disposed.

Claims

1. A medical waste disposal apparatus comprising:

a frame;

a receiving chamber connected with said frame, said receiving chamber having a discharge port;

an anvil connected with said receiving chamber and positioned adjacent said discharge port, said anvil having a generally planar anvil surface on a side of said anvil positioned away from said receiving chamber, said anvil having a cooperating anvil aperture extending through said anvil and aligned with said discharge port;

a knife having two opposing, generally planar knife surfaces and positioned with a first knife surface of said two opposing knife surfaces abutting said anvil surface in sliding engagement, said knife sliding along an axis, said knife having a knife hole extending through said knife;

an assembly plate having a generally planar surface abutting a second knife surface of said two opposing knife surfaces in sliding engagement to sandwich said knife between said anvil and said assembly plate, said assembly plate having an opening extending through said assembly plate; and

a drive operatively connected with said knife to slide said knife.

2. The apparatus defined in claim 1 wherein said knife slides between a first position in which said knife hole overlaps said anvil aperture and a second position in which said knife hole is offset from said anvil aperture.

3. The apparatus defined in claim 2 wherein said knife hole overlaps said member opening when said knife is in said second position.

4. The apparatus defined in claim 3 wherein said knife has a second knife hole, said second knife hole being spaced along said axis from said knife hole, said second knife hole overlapping said anvil aperture when said knife is in said second position and wherein said assembly plate has a second opening, said second opening being spaced from said opening of said assembly plate, said second knife hole overlapping said second member opening when said knife is in said first position.

5. The apparatus defined in claim 4 wherein said anvil further includes a first plate, a second plate, and a blade, said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate.

6. The apparatus defined in claim 5 wherein said blade is operatively connected with said drive to slide said blade.

7. The apparatus defined in claim, 6 wherein said anvil aperture has a first part defined by said first plate and has a second part defined by said second plate, said second part being smaller than said first part.

8. The apparatus defined in claim 7 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

9. The apparatus defined in claim 8 wherein each said knife hole defines a conic frustrom.

10. The apparatus defined in claim 8 wherein each said cutting edge is serrated.

11. The apparatus defined in claim 1 wherein said anvil further includes a first plate, a second plate, and a blade;

said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate.

12. The apparatus defined in claim 11 wherein said blade is operatively connected with said drive to slide said blade.

13. The apparatus defined in claim 12 wherein said anvil aperture has a first part defined by said first plate and has a second part defined by said second plate, said second part being smaller than said first part.

14. The apparatus defined in claim 13 wherein said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

15. The apparatus defined in claim 14 wherein said knife hole defines a conic frustrom.

16. The apparatus defined in claim 13 wherein said knife hole and one of said two opposing knife surfaces define a cutting edge and said cutting edge is serrated.

17. The apparatus defined in claim 1 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

18. The apparatus defined in claim 17 wherein said knife hole defines a conic frustrom.

19. The apparatus defined in claim 1 wherein said knife hole defines a conic frustrom.

20. A medical waste disposal apparatus comprising:

a frame;

a receiving chamber connected with said frame, said receiving chamber having an access port and a discharge port, said discharge port including an anvil circumscribing said discharge port, said anvil having a generally planar anvil surface on a side of said anvil positioned away from said receiving chamber;

a knife having two opposing, generally planar knife surfaces and positioned with a first knife surface of said two opposing knife surfaces abutting said anvil surface in sliding engagement, said knife sliding along an axis, said knife having a first hole and a second hole, each of said first hole and said second hole extending through said knife, said first hole and said second hole being spaced from one another along said axis; and

a member having a generally planar member surface abutting a second knife surface of said two opposing knife surfaces in sliding engagement to sandwich said knife between said anvil and said member, said member having an opening extending through said member; and

a drive operatively connected with said knife to slide said knife.

21. The apparatus defined in claim 20 wherein said knife slides between a first position in which said first hole overlaps said discharge port and a second position in which said second hole overlaps said discharge port.

22. The apparatus defined in claim 21 wherein said member has a second opening, said second opening being spaced from said opening of said member, said second hole of said knife overlapping said second opening when said knife is in said first position, said first hole of said knife overlapping said opening of said member when said knife is in said second position.

23. The apparatus defined in claim 22 wherein said anvil further includes a first plate, a second plate, and a blade, said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate.

24. The apparatus defined in claim 23 wherein said blade is operatively connected with said drive to slide said blade.

25. The apparatus defined in claim 24 wherein said anvil aperture has a first part defined by said first plate and has a second part defined by said second plate, said second part being smaller than said first part.

26. The apparatus defined in claim 25 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

27. The apparatus defined in claim 26 wherein each said knife hole defines a conic frustrom.

28. The apparatus defined in claim 27 wherein each said cutting edge is serrated.

29. The apparatus defined in claim 20 wherein said anvil further includes a first plate, a second plate, and a blade, said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate.

30. The apparatus defined in claim 29 wherein said anvil aperture has a first part defined by said first plate and has a second part defined by said second plate, said second part being smaller than said first part.

31. The apparatus defined in claim 30 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

32. The apparatus defined in claim 31 wherein each said cutting edge is serrated.

33. The apparatus defined in claim 20 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

34. A medical waste disposal apparatus comprising:

a frame;

a receiving chamber connected with said frame, said receiving chamber having an access port and a discharge port;

an anvil connected with said discharge port, said anvil including a generally planar anvil surface on a side of said anvil positioned away from said receiving chamber and including an anvil aperture corresponding to said discharge port, said anvil aperture extending through said anvil and being aligned with said discharge port;

a knife having two opposing, generally planar knife surfaces, said knife being positioned with a first knife surface of said two opposing knife surfaces abutting said anvil surface in sliding engagement, said knife sliding along an axis, said knife having at least one knife hole extending through said knife;

an assembly plate having a generally planar plate surface abutting a second knife surface of said two opposing knife surfaces in sliding engagement to sandwich said knife between said anvil and said assembly plate, said assembly plate having a plate opening extending through said assembly plate;

a first spacer interposed between said anvil and said assembly plate, said first spacer abutting a first of two opposing edges of said knife;

a second spacer interposed between said anvil and said assembly plate, said second spacer abutting a second of said two opposing edges of said knife; and

a drive operatively connected with said knife to slide said knife.

35. The apparatus defined in claim 34 wherein said knife slides between a first position in which said knife hole overlaps said anvil aperture and a second position in which said knife hole is offset from said anvil aperture, and wherein said knife hole overlaps said plate opening when said knife is in said second position.

36. The apparatus defined in claim 35 wherein said anvil further includes a first plate, a second plate, and a blade, said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate.

37. The apparatus defined in claim 36 wherein said blade is operatively connected with said drive to slide said blade.

38. The apparatus defined in claim 37 wherein said anvil aperture has a first part defined by said first plate and has a second part defined by said second plate, said second part being smaller than said first part.

39. The apparatus defined in claim 38 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

40. The apparatus defined in claim 39 wherein each said knife hole defines a conic frustrom.

41. The apparatus defined in claim 40 wherein each said cutting edge is serrated.

42. The apparatus defined in claim 34 wherein said anvil further includes a first plate, a second plate, and a blade, said blade being substantially similar to said knife and being interposed in sliding engagement between said first plate and said second plate, said blade being operatively connected with said drive to slide said blade.

43. The apparatus defined in claim 42 wherein each said knife hole has a sidewall defining a cutting edge between said sidewall and one of said two opposing knife surfaces and wherein said sidewall defines an acute angle with said one of said two opposing knife surfaces.

44. The apparatus defined in claim 43 wherein each said knife hole defines a conic frustrom.

45. The apparatus defined in claim 44 wherein each said cutting edge is serrated.