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:
Feb. 02, 1988
Filed:
Oct. 28, 1986
Applicant:
Inventor:
Vincent L Vailancourt, Livingston, NJ (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61M / ;
U.S. Cl.
CPC ...
604122 ; 137860 ; 604129 ;
Abstract
The air check valve has a one-piece housing provided with a pair of coaxial passageways and radiating ports which are closed over by an elastic sleeve. When the pressure in the upstream passageway is greater than in the downstream passageway and the crack or opening pressure of the sleeve is exceeded, the sleeve expands radially so as to permit communication between the two passageways for the conveyance of fluid. The air check valve may also be provided with a one-way valve in a partition between the two passageways to permit withdrawal of fluids from a patient.