Check valve and method of fabrication
US6581633B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Oct 17, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7932
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check valve comprising a casing having a flange extending circumferentially around the inner periphery of the body. The flange is constructed by first drilling from a first direction at a diameter less than the predetermined diameter and then drilling from an opposite direction at the predetermined diameter. The flange defines a valve aperture for receiving a poppet valve. The poppet valve includes a stem including a plurality of legs each having an outer peripheral surface facing the valve aperture. The outer peripheral surface of the valve legs have rounded or recessed edges such that only a center portion of the outer peripheral surface of the legs can come into contact with the inner surface defining the valve aperture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.