Sharps disposal system

• US 5,639,031 A
• Filed: 06/06/1995
• Issued: 06/17/1997
• Est. Priority Date: 05/05/1992
• Status: Expired due to Fees

• Current Assignee: Wright; Glenn Albert
• Original Assignee: Wright; Glenn Albert
• Inventors: Wright, Glenn Albert, Nguyen, Tuan Q., Fritz, Philip Francis
• Primary Examiner(s): Watts, Douglas D.
• Application Number:
  US08/467,019
• Time in Patent Office: 742 Days
• Field of Search: 241/33, 241/46.017, 241/46.08, 241/99, 241/100, 241/16, 241/DIG. 38
• US Class Current: 241/33
• CPC Class Codes: A61L 11/00 Methods specially adapted for refuse disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00
• CPC Class Codes: B02C 18/0084 specially adapted for disintegrating garbage, waste or sewage
• CPC Class Codes: B02C 18/12 with drive arranged below container B02C18/083 takes precedence
• 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: B02C 23/18 Adding fluid, other than for crushing or disintegrating by fluid energy for tumbling mills B02C17/186; feeding devices B02C23/02
• CPC Class Codes: Y10S 241/38 Solid waste disposal
• CPC Class Codes: Y10S 241/606 Medical/surgical waste comminution

Abstract

A sharps disposal apparatus is provided for reducing contaminated medical sharps into unrecognizable, ordinary waste. The disposal apparatus comprises a disposal unit including a disposer, disposable waste receptacle, and sterilant recycling system. During the destruction and sterilization operation, the sterilant recycling system introduces sterilant into the disposer to sterilize the contaminated medical sharps while the disposer is grinding the sharps into small fragments. Once the medical waste is reduced to small fragments and is sterilized, the reduced waste is deposited in the disposable waste receptacle. Excess disinfectant flows through the waste receptacle and is recovered by a reservoir to be recycled. After the waste receptacle is full, the waste receptacle is easily removed from disposal unit, without the reduced medical waste coming into contact with human hands, and is disposed as ordinary waste.

Claims

1. A disposal apparatus for processing hospital waste, including medical waste and medical sharps, said disposal apparatus comprising a disposer for processing the waste into small particles of processed waste, a sterilant recirculation system for delivering sterilant into said disposer, and a waste receptacle for said processed waste, said waste receptacle comprising an influent port through which said processed waste enters said receptacle, a container that holds said processed waste from said disposer, said container being constructed of a fluid impermeable material, an effluent port through which said sterilant exits said container, and a filter positioned between said container and said effluent port, said sterilant recirculation system extending between said disposer and said waste receptacle to circulate sterilant between said disposer and said waste receptacle and to capture sterilant flowing through said effluent port of said waste receptacle.

2. The disposal apparatus of claim 1, wherein said waste receptacle comprises a first cap and a second cap, said first cap being configured to fasten to said influent port and said second cap being configured to fasten to said effluent port to seal said waste receptacle.

3. The disposal apparatus of claim 1, wherein said effluent port is positioned at the bottom of said waste receptacle.

4. The disposal apparatus of claim 1, wherein said waste receptacle generally has a funnel-like shape to maximize drainage through said waste receptacle.

5. The disposal apparatus of claim 1, additionally comprising a reservoir for holding a volume of said sterilant.

6. The disposal apparatus of claim 5, wherein said reservoir is positioned below said waste receptacle to capture excess sterilant passing through said effluent port.

7. The apparatus of claim 1 wherein said sterilant is a liquid disinfectant.

8. The disposal apparatus of claim 7, wherein said reservoir is in selective communication with a chemical supply source and with a water supply source.

9. The disposal apparatus of claim 8, further comprising a microprocessor and at least one detector for monitoring the sterilant and automatically introducing chemical from the chemical supply source into the sterilant based upon a preselected concentration criteria.

10. The disposal apparatus of claim 9, wherein said sterilant comprises water and chlorine.

11. The disposal apparatus of claim 9, wherein the preselected concentration criteria comprises an aqueous solution having within the range of from about 2000 ppm to about 8000 ppm chemical agent.

18. The disposal apparatus of claim 1 additionally comprising a microprocessor controlling the operation of the apparatus.

19. The apparatus of claim 1, wherein said waste receptacle is puncture resistant.

20. The apparatus of claim 1, wherein said influent port and said effluent port each have a longitudinal axis that is defined by the direction of flow of said sterilant through said port, said longitudinal axes being offset from each another.

12. A disposal apparatus for processing hospital waste, including medical waste and medical sharps, said disposal apparatus comprising:

a disposer for processing the waste into small particles of processed waste, said disposer comprising;

a grinding chamber which receives the waste;

a shear ring defining an interior annular surface supporting an array of spaced teeth which project inwardly towards the center of said shear ring, each tooth extending from said interior annular surface at an angle from and in a plane parallel to a central vertical axis of said disposer, each tooth having a generally flat, bottom surface defining a shearing edge, a plurality of said teeth comprising top portions extending above the tops of the other said teeth and at a greater angle relative to said central axis to define inverted, generally L-shaped teeth in said array of spaced teeth; and

a disk rotatable about said central axis, said disk carrying a cutter element forming a shearing surface and positioned to engage said shearing surfaces defined by the array of teeth and to cooperate with said teeth to shear the waste as said disk rotates;

a disposable waste receptacle which receives said processed waste from said disposer, said waste receptacle comprising;

an influent port through which said processed waste enters said receptacle;

a container that holds said processed waste from said disposer, said container being constructed of a fluid impermeable material;

an effluent port through which said sterilant exits said container; and

a filter positioned between said container and said effluent port; and

a sterilant recirculation system that circulates sterilant between said disposer and said waste receptacle and captures sterilant flowing through said effluent port of said waste receptacle.

13. The disposal apparatus of claim 12 additionally comprising a flat blade extending from said disk to juxtapose said teeth bottoms for cooperating with said shearing edge.

14. The disposal apparatus of claim 12, wherein said shear ring additionally comprises a plurality of elongated teeth extending above the tops of the adjacent teeth.

15. The disposal apparatus of claim 12, wherein said teeth of said shear ring are angled from a central axis of said disposer by about 45°

.

16. The disposal apparatus of claim 12, wherein said disk comprises at least one hammer extending upwardly from a top surface of said disk.

17. The disposal apparatus of claim 12, additionally comprising a drive motor connected to said disk.

21. The apparatus of claim 12, additionally comprising a reservoir for holding a volume of said sterilant.

22. The apparatus of claim 21, wherein said sterilant recirculation system circulates said sterilant from said reservoir to said disposer through said influent port to said container through said filter and said effluent port and back to said reservoir.