Valve improvements
US4901754A · kind A · utility
13Cited by
44References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | May 2, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7868
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Valve assemblies having a valve seat with a conical surface for causing an included O-ring to roll upon and wedge against the conical surface for closing the port when a spherical valve member is forced against the O-ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.