Hydrant design
US6178988A · kind A · utility
8Cited by
15References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 11, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Dec 11, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/5532
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydrant valve assembly including a spool member having at least one spool seal which is at times under extremely high pressure tending to cause the seal to be displaced from an associated recess, the spool member forming venting passages in the seal recess to alleviate seal pressure, the invention also including a new wet pipe design and a new collar design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.