DISPOSABLE CARBON DIOXIDE ABSORBER

• US 3,615,233 A
• Filed: 07/28/1969
• Issued: 10/26/1971
• Est. Priority Date: 07/28/1969
• Status: Expired due to Term

• Current Assignee: Allied Healthcare Products Incorporated
• Original Assignee: Gary K. Porter, William E. Doering
• Inventors: Doering, William E., Porter, Gary K.
• Primary Examiner(s): Tayman, James H.
• Application Number:
  US04/845,355
• Time in Patent Office: 820 Days
• Field of Search: 23/252,284 128/191,202,188,142.2 206/.7,84 55/387,512,518,DIG.33
• US Class Current: 422/117
• CPC Class Codes: A62B 19/00 Cartridges with absorbing substances for respiratory apparatus carbon dioxide absorbing devices A61M16/22
• CPC Class Codes: Y10S 128/909 Breathing apparatus with means for preventing patient cross-contamination

Abstract

A disposable carbon dioxide absorber having self-contained valves and being designed to be used once and then disposed of in order to eliminate certain hazards of reinfection and crossinfection.

Claims

2. The disposable carbon dioxide absorber apparatus of claim 1 wherein the retaining wall adjacent said inlet wall has a perforated portion adapted to permit gaseous flow from said inlet opening to said absorbent material and an imperforate portion aligned with said inlet opening and adapted to deflect gaseous flow from said inlet opening toward said perforated portion, and wherein the retaining wall adjacent said outlet wall has a perforated portion adapted to permit gaseous flow from said absorbent material to said outlet opening and an imperforate portion aligned with said outlet opening and adapted to deflect gaseous flow from an adjacent portion of said porous mass toward said perforated portion.

3. The disposable carbon dioxide absorber apparatus of claim 2 wherein each retaining wall further has an imperforate margin.

4. The disposable carbon dioxide absorber apparatus of claim 1 further comprising a generally tubular inlet check valve fitting integrally attached to said inlet fitting to communicate with said inlet fitting through a valve opening in the lateral wall of said inlet fitting, said inlet check valve means being arranged to permit gaseous inflow through said inlet check valve fitting and check gaseous outflow through said inlet check valve fitting.

5. The disposable carbon dioxide absorber apparatus of claim 4 wherein said inlet wall is formed in one piece with said inlet fitting and with said inlet check valve fitting.

6. The disposable carbon dioxide absorber apparatus of claim 1 further comprising a generally tubular outlet check valve fitting integrally attached to said outlet fitting to communicate with said outlet fitting through a valve opening in the lateral wall of said outlet fitting, said outlet check valve means being arranged to permit gaseous outflow through said outlet check vAlve fitting and to check gaseous inflow through said outlet check valve fitting.

7. The disposable carbon dioxide absorber apparatus of claim 6 wherein said outlet wall is formed in one piece with said outlet fitting and with said outlet check valve fitting.

8. The disposable carbon dioxide absorber apparatus of claim 6 further comprising a generally tubular inlet check valve fitting integrally attached to said inlet fitting to communicate with said inlet fitting through said inlet valve opening being formed in the lateral wall of said inlet fitting and a generally tubular outlet check valve fitting integrally attached to said outlet fitting to communicate with said outlet fitting through said outlet valve opening being formed in the lateral wall of said outlet fitting, said inlet check valve means being arranged to permit gaseous inflow through said inlet check valve fitting and check gaseous outflow through said inlet check valve fitting, said outlet check valve means being arranged to permit gaseous outflow through said outlet check valve fitting and to check gaseous inflow through said outlet check valve fitting.

9. The disposable carbon dioxide absorber apparatus of claim 8 wherein said inlet wall is formed in one piece with said inlet fitting and with said inlet check valve fitting and said outlet wall is formed in one piece with said outlet fitting and with said outlet check valve fitting.

10. Disposable carbon dioxide absorber apparatus for use in absorbing gaseous carbon dioxide from a mixture of gases in respiratory apparatus, said disposable carbon dioxide absorber apparatus comprising:

a canister adapted to contain carbon dioxide absorbent material, said canister having spaced inlet and outlet walls;

an inlet fitting integrally attached to said inlet wall to communicate with the interior of said canister through an inlet opening in said inlet wall;

inlet check valve means arranged to permit gaseous inflow through an inlet valve opening in said inlet fitting and to check gaseous outflow through said inlet valve opening;

an outlet fitting integrally attached to said outlet wall to communicate with the interior of said canister through an outlet opening in said outlet wall;

outlet check valve means permitting gaseous outflow through an outlet valve opening in said outlet fitting and checking gaseous inflow through said outlet valve opening; and

an infeed fitting integrally attached to said outlet fitting to communicate with said outlet fitting through an infeed opening in the lateral wall of said outlet fitting, said infeed fitting being located between the outlet opening in said outlet wall and said outlet check valve.

11. The disposable carbon dioxide absorber apparatus of claim 10 further comprising a generally tubular inlet check valve fitting integrally attached to said inlet fitting to communicate with said inlet fitting through said inlet valve opening being formed in the lateral wall of said inlet fitting and a generally tubular outlet check valve fitting integrally attached to said outlet fitting to communicate with said outlet fitting through said outlet valve opening being formed in the lateral wall of said outlet fitting, said inlet check valve means being arranged to permit gaseous inflow through said inlet check valve fitting and check gaseous outflow through said inlet check valve fitting, said outlet check valve means being arranged to permit gaseous outflow through said outlet check valve fitting and to check gaseous inflow through said outlet check valve fitting.

12. The disposable carbon dioxide absorber apparatus of claim 11 wherein said inlet wall is formed in one piece with said inlet fitting and with said inlet check valve fitting and said outlet wall is formed in one piece with said outlet fitting and with said outlet check valve fitting.

13. The disposable carbon dioxide absorber apparatus of claim 11 wherein said infeed opening is located directly opposite said outlet valve opening in the lateral wall of said ouTlet fitting.

14. The disposable carbon dioxide absorber apparatus of claim 1 wherein said inlet wall and the adjacent retaining wall together form part of a detachable cover for said canister.

15. Disposable carbon dioxide absorber apparatus for use in absorbing gaseous carbon dioxide from a mixture of gases in respiratory apparatus, said disposable carbon dioxide absorber apparatus comprising a generally cup-shaped member adapted to contain carbon dioxide absorbent material and a cover for said generally cup-shaped member;

said generally cup-shaped member including a lateral wall, spaced apart outer and inner walls attached to one end of said lateral wall, said inner wall serving to retain said absorbent material in spaced relation to said outer wall and having a perforated portion adapted to permit gaseous flow therethrough, a fitting attached to said outer wall to communicate with the space between said outer and inner walls through an opening in said outer wall, and check valve means permitting gaseous flow in one direction into said fitting and checking gaseous flow in the opposite direction into said fitting;

said cover being adapted to be attached to the opposite end of the lateral wall of said generally cup-shaped member and including spaced-apart outer and inner walls attached to each other as part of said cover, said inner wall serving to retain said absorbent material in spaced relation to said outer wall and having a perforated portion adapted to permit gaseous flow therethrough, a fitting attached to said outer wall to communicate with the space between said outer and inner walls through an opening in said outer wall, and check valve means permitting gaseous flow in one direction through said fitting and checking gaseous flow in the opposite direction through said fitting;

the respective check valve means being so arranged that the direction of permitted gaseous flow into the fitting of said cover is opposite the direction of permitted gaseous flow into the fitting of said generally cup-shaped member, when said cover is attached to said opposite end of the lateral wall of said generally cup-shaped member, to permit one-way gaseous flow through said generally cup-shaped member.

16. The disposable carbon dioxide absorber apparatus of claim 15 wherein each inner wall has an imperforate portion aligned with the opening in the associated outer wall.

17. The disposable carbon dioxide absorber apparatus of claim 16 wherein each inner wall further has an imperforate margin.

18. The disposable carbon dioxide absorber apparatus of claim 15 wherein the check valve means of said generally cup-shaped member permits gaseous outflow from the fitting of said generally cup-shaped member and checks gaseous inflow to the same fitting and wherein the check valve means of said cover permits gaseous inflow from the fitting of said cover and checks gaseous outflow from the same fitting.