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:
Aug. 12, 1980
Filed:
Jan. 30, 1978
Applicant:
Inventor:
Ronald O Browne, Santa Barbara, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137199 ; 137613 ;
Abstract
A check valve is inserted in a tubing such as a catheter for transmission of dry gas such as to the bladder of a person. It prevents the flow of liquid such as urine through it by means of a plug of a foam material which permits the flow of dry gas through it and past end discs of a material which expands in the presence of liquid to plug up the passageway of the valve thereby preventing liquid from flowing through it.