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:
Dec. 12, 1978
Filed:
May. 26, 1977
James M Wynn, San Jose, CA (US);
Other;
Abstract
A check valve assembly is disclosed. A hollow valve body is provided with respective upstream and downstream ends. A valve seat is located on the interior of the valve body and has an annular seating surface directed toward the downstream end of the valve body. The seating surface is inclined at an acute angle relative to the centerline of the valve body. A poppet element is provided which has a circumferential surface with a relatively narrow neck proximate the valve seat. The circumferential surface of the poppet element on the downstream side of the neck has a frustoconical configuration. A deformable resilient O-ring circumscribes the poppet element at the neck. The outer diameter of the O-ring is greater than the inner diameter of the annular seating surface of the valve seat so that the flow of fluid through the valve body from the downstream end to the upstream end presses the O-ring against the seating surface to close the valve.