Valve assembly
US6708716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jan 18, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88062
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve assembly includes a valve body having a passageway and first and second oppositely facing valve seats that extend around the passageway. First and second valve elements are positioned in the passageway to seal against the respective valve seats, and a spring biases the first valve element to the closed position against the first valve seat. The valve seats are spaced sufficiently closely together along the passageway that the first valve element, when positioned against the first valve seat, holds the second valve element away from the second valve seat. For this reason, the spring also biases the second valve element away from the second valve seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.