CO2sorbent for inhalation drug therapy system

• US 7,089,933 B2
• Filed: 10/25/2002
• Issued: 08/15/2006
• Est. Priority Date: 10/25/2002
• Status: Expired due to Fees

• Current Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Hamilton Sundstrand Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Goldblatt, Loel, Nalette, Timothy
• Primary Examiner(s): Dawson, Glenn K.
• Application Number:
  US10/280,860
• Publication Number:
  US 20040079367A1
• Time in Patent Office: 1,390 Days
• Field of Search: 12820014-20024, 128/201.12, 128/203.12, 128/203.15, 128/203.23, 128/201.13, 128/201.27, 128/203.16, 128/203.18, 128/204.18, 128/205.27, 128/205.28, 128/205.29, 128/204.16, 128/205.12, 423/230
• US Class Current: 128/203.12
• CPC Class Codes: A61M 11/06 of the injector type
• CPC Class Codes: A61M 16/22 Carbon dioxide-absorbing devices ; Other means for removing carbon dioxidecartridges with absorbing substances for respiratory apparatus A62B19/00
• CPC Class Codes: A62B 19/00 Cartridges with absorbing substances for respiratory apparatus carbon dioxide absorbing devices A61M16/22
• CPC Class Codes: B01D 2253/112 Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 53/0415 Beds in cartridges
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A carbon dioxide (CO₂) sorbent system for removing CO₂ from a recirculating inhalation therapy system includes several sorbent layers within a housing defining an inlet and an outlet. Airflow passages sandwiched between CO₂ sorbent layers allow airflow from the inhalation therapy system through the CO₂ sorbent assembly. The recirculating inhalation therapy system controls the amount of CO₂ within the system without removing aerosol medication contained within the breathable air stream.

Claims

1. An inhalation therapy system comprising;

a containment chamber for administering a recirculating breathable air supply;

a device for introducing aerosol medication into said recirculating breathable air supply;

a CO₂ sorbent assembly for controlling CO₂ content including a passage for said breathable air supply, wherein said CO₂ sorbent assembly includes several layers and said passage is disposed between said layers of CO₂ sorbent and wherein said CO₂ sorbent is regenerable.

2. The system of claim 1, wherein said CO₂ sorbent is encapsulated within a porous material providing containment of said CO₂ sorbent.

3. The system of claim 1, further including air passage fins defining said passage.

4. The system of claim 3, wherein said air passage fins are integrally formed within said CO₂ sorbent.

5. The system as recited in claim 3, wherein said air passage fins comprise a plurality of alternating peaks and valleys.

6. The system of claim 1 wherein said CO₂ sorbent is silver oxide.

7. The system as recited in claim 1, including perforated sheets disposed between said several layers of CO₂ sorbent.