Valve assembly
US5755261A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1995 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Nov 30, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86815
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve assembly has a valve seat formed with valve holes which can be opened and closed by sliding a valve body on the valve seat. Its water stopping capacity is kept high after long, continuous use. Its handle operability is also kept high. A valve seat 6 or valve body 11 is made of a synthetic resin composition comprising 100 parts by weight of a polycyanoarylether resin, and 40-165 parts by weight of glassy carbon having an average particle diameter not exceeding 25 .mu.m. This resin composition may further comprise not more than 30 parts by weight of a fluororesin powder such as PTFE. Otherwise, the valve assembly may have a valve body 11 made of a ceramic material, and a valve seat 6 made of a synthetic resin having a land portion 12 formed on the center of its surface opposite the valve body 11. The diameter of the land portion 12 is smaller than the outer diameter of the valve body 11. Even if the valve seat 6 is deformed under water supply pressure, the land portion 12 can retain its shape. Thus, it is possible to prevent the formation of a gap between the valve body 11 and the land portion 12. A plurality of concentric grooves may be formed in the bottom surface of the le…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.