Two-stage pressure limiting valve
US6446613B1 · kind B1 · utility
12Cited by
10References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2001 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7867
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A two stage pressure limiting valve comprises a valve member arranged for axial movement in a bore. The valve member is biased to close a side spill port and a valve opening communicating with a source of high pressure. Pressure at the valve member/valve seat interface in excess of a threshold value forces the valve member away from the seat whereby a pressure relief volume of fluid is permitted to flow through the valve member itself. Sustained high pressure forces the valve member further away from the valve seat to open a side spill port and establish a larger diversion of fluid at a stable lower pressure level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.