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:
Jun. 12, 2012
Filed:
Mar. 14, 2008
Paul P. Spahr, New Haven, CT (US);
Andrew J. Curello, Hamden, CT (US);
Paul P. Spahr, New Haven, CT (US);
Andrew J. Curello, Hamden, CT (US);
Societe BIC, , FR;
Abstract
In accordance with different embodiments of the present invention, duckbill check valve, having an orifice, and conical check valve, having an orifice, are responsive to the differential pressure of fluid F as it flows between inletand outlet. In an innovative aspect of the invention, orificeand orificeeach have a variable effective diameter. In one embodiment, the duckbill check valveand conical check valvehave a conical end that is aligned with the direction of fluid flow. In another embodiment, the duckbill check valvecan have a conical end that faces the direction of fluid flow. A pin may traverse orificeor
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile