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:
Mar. 17, 1998
Filed:
Jun. 26, 1996
Michael Duer, Pittsburgh, PA (US);
Red Valve Company, Inc., Carnegie, PA (US);
Abstract
An inversion-resistant check valve or tide gate valve has a sleeve bounding a longitudinally extending, flow-through passage for fluids. The sleeve has an intermediate region and an upstream fluid inlet end region mountable on a discharge end of a conduit which is elongated along a longitudinal first axis of symmetry. The sleeve also has a downstream fluid outlet end region comprised of two or more thin and flexible lips which are opposed to each other and which are pre-formed to define a bill which is curvilinear. The lips are thinner and more flexible than the intermediate region. The curvilinear bill ensures sealing of the thinner, more flexible lips, allows easier opening of the valve, and reduces the likelihood of gapping in the lips. Unwanted backflow through the check valve is thereby prevented.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile