Canister having fluid flow control

• US 8,267,909 B2
• Filed: 05/01/2008
• Issued: 09/18/2012
• Est. Priority Date: 05/01/2008
• Status: Active Grant

• Current Assignee: Sunrise Medical Hhg Incorporated (Sunrise Medical Incorporated)
• Original Assignee: DeVilbiss Healthcare LLC
• Inventors: Clementi, Francis J., Neatrour, Joel David
• Primary Examiner(s): SU, SUSAN SHAN
• Application Number:
  US12/150,831
• Publication Number:
  US 20090275905A1
• Time in Patent Office: 1,601 Days
• Field of Search: 604/319, 604/320, 604/317
• US Class Current: 604/320
• CPC Class Codes: A61M 1/78 Means for preventing overflow or contamination of the pumping systems combined with drainage containers A61M1/60
• CPC Class Codes: A61M 1/782 using valves with freely moving parts, e.g. float valves
• CPC Class Codes: A61M 1/784 by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes

Abstract

A canister for use with a medical suction or aspiration device has a first fluid chamber and a second fluid chamber. The first fluid chamber has an inlet. The second fluid chamber has an outlet port. A splash baffle is disposed between the first fluid chamber and the second fluid chamber. The splash baffle has an aperture formed therethrough to allow for fluid flow from the first fluid chamber to the second fluid chamber. An absorbent valve having voids is disposed within the second fluid chamber and engages a portion of the outlet port. The absorbent valve restricting fluid permeability upon contact with fluid from the first fluid chamber to restrict fluid flow through the outlet port.

Claims

1. A canister comprising:

a perimeter wall defining a first fluid chamber;

a splash baffle extending horizontally into said first fluid chamber, said splash baffle enclosing a second fluid chamber;

an inlet port defined in the first fluid chamber;

an outlet port defined in the second fluid chamber, said outlet port having an attachment flange extending into said second fluid chamber;

a valve seat disposed in the second fluid chamber opposite said outlet port;

an elongated slot extending around at least a portion of said splash baffle, said slot being at least partially oriented toward the bottom of said first fluid chamber, said slot allowing fluid flow from the first fluid chamber to the second fluid chamber; and

a hollow absorbent valve having a closed end and an open end, said open end engaging said attachment flange and said closed end resting on the valve seat, said absorbent valve restricting fluid permeability upon contact with fluid from the first fluid chamber to prevent fluid flow through the outlet port.

2. The canister of claim 1, wherein the inlet port is positioned adjacent to the splash baffle.

3. The canister of claim 1, wherein the first fluid chamber is larger than the second fluid chamber.

4. The canister of claim 1, wherein said valve seat restricts the expansion of said absorbent valve in one direction.

5. The canister of claim 1, wherein the outlet port includes a vacuum source connection extending outwardly from the exterior of said perimeter wall.

6. The canister of claim 1, wherein the splash baffle restricts splashing fluid from the first fluid chamber from entering the second fluid chamber.

7. The canister of claim 1, wherein the absorbent valve has a fluid absorption characteristic.

8. The canister of claim 7, wherein the absorbent valve becomes fluid restrictive in response to the fluid absorption characteristic when in contact with fluid flow from the first fluid chamber.

9. The canister of claim 7, wherein the fluid absorption characteristic is hydrophilic.

10. The canister of claim 7, wherein the fluid absorption characteristic is hygroscopic.

11. The canister of claim 1, wherein the absorbent valve is made from a polymer material.

12. The canister of claim 11 wherein the polymer material is polyethylene plastic.

13. The canister of claim 12, wherein the polymer material includes a cellulose gum filler.