Leaf valve structure
US9200692B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 24, 2011 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Mar 25, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7932
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A leaf valve structure according to this invention comprises an annular valve seat, and a leaf that is seated on the valve seat under a predetermined elastic supporting force against a pressure of a working fluid on an inner side of the valve seat. A recessed depression portion having an opening portion on both an inner periphery of the valve seat and a seating surface of the leaf is formed in the valve seat, thereby creating a site where the pressure of the working fluid on the inner side of the valve seat can act more easily on a seating surface between the valve seat and the leaf valve. Accordingly, an effect of a surface adsorption force applied to the leaf valve by the valve seat on a cracking pressure can be suppressed, and as a result, the leaf valve can be lifted under a stable cracking pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.