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. 03, 2011
Filed:
Jan. 10, 2005
Robert Patton Stribling, Monroe, GA (US);
Samuel Clifford Crosby, Lilburn, GA (US);
Robert Patton Stribling, Monroe, GA (US);
Samuel Clifford Crosby, Lilburn, GA (US);
The Last Straw, LLC, Monroe, GA (US);
Abstract
A flexible check valve is introduced within a fluid path for leakage protection. The flexible check valve can be a duckbill/crossbill valve comprising multiple flexible members that restrict the flow of fluid in a tubular member. The flexible check valve is preferably used in conjunction with a drinking straw to prevent liquid from exiting a container such as a drink box. Preferably, the flexible check valve is a crossbill valve that is attached using an adapter. Liquid is designed to only flow through when an external compressive force (e.g. users fingers or lips) is applied to the valve. When force is no longer applied to the valve section, the valve returns to its normally closed position and fluid is wholly or substantially prevented from exiting.