Low-leakage valve apparatus
US7048254B2 · kind B2 · utility
29Cited by
20References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2003 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Dec 23, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K43/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A low-leakage valve apparatus which reduces fugitive emissions from valves to the ambient atmosphere. A secondary packing chamber or gland is installed on an existing valve to intercept leakage past the valve's original primary packing gland, which otherwise would escape past the valve stem to the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.