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. 15, 1990
Filed:
Aug. 26, 1988
Applicant:
Inventors:
Timothy P Larsen, Wauwatosa, WI (US);
James A Devine, Waukesha, WI (US);
Michael T Larsen, Wauwatosa, WI (US);
Assignee:
Criticare Systems, Inc., Waukesha, WI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A62B / ; A61B / ;
U.S. Cl.
CPC ...
12820512 ; 12820421 ; 128719 ;
Abstract
A water trap for a gas analyzer includes self-sealing filters formed of a porous polymer that includes a cellulose extract that causes the polymer to become impermeable on contact with water. The water trap in this way automatically protects the gas analyzer from liquid contamination. Preferably, the gas analyzer monitors a pressure parameter of a pneumatic line connected to the water trap and provides an indication that the water trap should be replaced in the event this pressure parameter indicates an abnormal operating condition.