The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 1991
Filed:
Apr. 23, 1990
Barnum B Lambert, San Jose, CA (US);
Environmental Support Systems, Inc., San Jose, CA (US);
Abstract
A disposable CO.sub.2 absorber for applications in rebreathing systems uses a flexible bag-like pouch to contain CO.sub.2 absorbent granules. The pouch includes an intake port having a one-way valve at the top of the pouch and an outlet or exhaust port including a perforated cylindrical tube or perforated disk in the bottom of the pouch. Exhaled gas containing CO.sub.2 passes through the one-way valve at the intake port and contacts the absorbent granules where a chemical reaction bonds the CO.sub.2 with the granules. The residual gas, substantially free of CO.sub.2, passes out of the pouch through the exhaust ports for rebreathing by the user. The flexure of the pouch increases the efficiency with which the CO.sub.2 is absorbed.