Manifold and filter assembly with filter basket

• US 7,497,340 B2
• Filed: 02/18/2005
• Issued: 03/03/2009
• Est. Priority Date: 02/19/2004
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Stryker Corporation
• Inventors: Noonan, Michael, MacDonald, Bruce, Staley, Karen, Huyser, Richard F., Isham, Stephen P., Hershberger, David
• Primary Examiner(s): Menon; Krishnan S
• Assistant Examiner(s): KURTZ, BENJAMIN M
• Application Number:
  US11/060,977
• Publication Number:
  US 20050189288A1
• Time in Patent Office: 1,474 Days
• Field of Search: 210/448, 210/452, 210/441, 210/130
• US Class Current: 210/435
• CPC Class Codes: A61M 1/79 Filters for solid matter specially adapted for dental use A61C17/065
• CPC Class Codes: A61M 1/88 Draining devices having means for processing the drained fluid, e.g. an absorber for liposuction A61M1/892
• CPC Class Codes: A61M 2209/084 Supporting bases, stands for equipment
• CPC Class Codes: B01D 2201/204 Systems for applying vacuum to filters
• CPC Class Codes: B01D 2201/48 Overflow systems
• CPC Class Codes: B01D 29/03 self-supporting
• CPC Class Codes: B01D 29/50 with multiple filtering elements, characterised by their mutual disposition B01D29/39 takes precedence
• CPC Class Codes: B09B 3/0075 Disposal of medical waste casings for used articles, e.g. sharps A61B50/362; sterilisation of refuse A61L11/00; disposal of used needles or syringes A61M5/3205; disintegrating medical waste B02C19/0075

Abstract

A manifold and filter assembly for use with a waste collection unit is provided. The manifold and filter assembly directs and filters medical waste flowing into the waste collection unit. The manifold and filter assembly comprises a manifold body defining a chamber and an outlet for directing the medical waste into the waste collection unit. A manifold cap is fitted to the manifold body to close the chamber. The manifold cap defines a plurality of inlets for receiving the medical waste. A filter basket having a bottom and a peripheral wall defining a plurality of openings is snap-locked to the manifold body. The filter basket is positioned such that a fluid bypass is formed between the filter basket and the manifold body and between the filter basket and the manifold cap. The fluid bypass is in fluid communication with the outlet whereby the medical waste can flow over the peripheral wall to the outlet through the fluid bypass.

Claims

1. A manifold and filter assembly for directing and filtering medical waste flowing into a waste collection unit, said assembly comprising:

a manifold housing defining a chamber and having at least one inlet fitting for receiving a suction line to draw the medical waste into said chamber and an outlet fitting dimensioned to be received in the waste collection unit to direct the medical waste from said chamber into the waste collection unit, said manifold housing including a bottom wall and a peripheral wall extending upwardly from said bottom wall;

a filter basket disposed in said chamber and having a basket bottom wall and a basket peripheral wall extending upwardly from said basket bottom wall, said filter basket having a plurality of holes defined in said basket bottom wall and a plurality of elongated slots defined in said basket peripheral wall with each of said plurality of elongated slots terminating a predetermined distance from said basket bottom wall to define an imperforate section of said basket peripheral wall between said elongated slots and said basket bottom wall whereby said plurality of holes initially filter the medical waste until plugged with filtered material and then said plurality of elongated slots continue to filter the medical waste; and

a plurality of spacers disposed between said peripheral walls and between said bottom walls to space said filter basket from said manifold housing to define a fluid bypass between said filter basket and said manifold housing whereby the medical waste can flow over said basket peripheral wall through said fluid bypass when said plurality of holes and said plurality of elongated slots become plugged with filtered material.

2. A manifold and filter assembly as set forth in claim 1 wherein said plurality of spacers include ribs integrally formed on said basket peripheral wall to space said basket peripheral wall from said peripheral wall of said manifold housing.

3. A manifold and filter assembly as set forth in claim 1 wherein said plurality of spacers include risers integrally formed on said bottom wall of said manifold housing to support said filter basket and space said basket bottom wall from said bottom wall of said manifold housing.

4. A manifold and filter assembly as set forth in claim 1 including at least one locking member formed on said basket bottom wall and at least one locking tab formed on said bottom wall of said manifold housing wherein said locking tab snap-locks to said locking member to fix said filter basket in position in said chamber.

5. A manifold and filter assembly as set forth in claim 1 wherein each of said plurality of holes and each of said plurality of elongated slots are in fluid communication with said fluid bypass.

6. A manifold and filter assembly as set forth in claim 1 wherein said manifold housing includes a manifold body and a manifold cap secured to said manifold body to close said manifold body and further define said chamber.

7. A manifold and filter assembly as set forth in claim 6 wherein said fluid bypass is further defined between said manifold cap and said filter basket and between said manifold body and said filter basket.

8. A manifold and filter assembly as set forth in claim 6 wherein said manifold cap includes a plurality of inlet fittings for selectively receiving suction lines and each of said plurality of inlet fittings includes an entrance tube disposed about an entry axis and said outlet fitting includes an outlet tube disposed about an outlet axis.

9. A manifold and filter assembly as set forth in claim 8 wherein said outlet axis is approximately normal to each of said entry axes.

10. A manifold and filter assembly as set forth in claim 8 wherein all of said entry axes are parallel.

11. A manifold and filter assembly as set forth in claim 8 including a plurality of port caps for covering said plurality of inlet fittings and a plurality of connection straps integrally formed on said manifold cap and connecting each of said port caps to said manifold cap.

12. A manifold and filter assembly as set forth claim 8 including an outlet port cap for covering said outlet fitting and a connection strap integrally formed on said manifold cap and connecting said outlet port cap to said manifold cap.

13. A manifold and filter assembly as set forth in claim 1 including a waste retention valve disposed in said outlet fitting and movable between open and closed positions for allowing the medical waste to exit said outlet fitting when in said open position in response to a predetermined pressure applied to said waste retention valve and for retaining the medical waste in said outlet fitting when in said closed position upon removal from the waste collection unit and said predetermined pressure.

14. A manifold and filter assembly as set forth in claim 13 wherein said waste retention valve is normally in said closed position.

15. A manifold and filter assembly as set forth in claim 1 wherein at least a portion of said manifold housing is semi-transparent for viewing the medical waste in said chamber.

16. A manifold and filter assembly as set forth in claim 1 including a filter element having an annular shape disposed in said filter basket adjacent to said basket peripheral wall such that the medical waste being filtered flows through said filter element and said plurality of elongated slots.

17. A manifold and filter assembly as set forth in claim 1 including a plurality of compartment walls disposed on said basket bottom wall and extending upwardly from said basket bottom wall to define a plurality of compartments for individually collecting filtered material.

18. A manifold and filter assembly as set forth in claim 1 wherein each of said elongated slots has a first area and each of said holes has a second area smaller than said first area.