Pressure-regulating piston with built-in relief valve
US6553979B2 · kind B2 · utility
33Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 25, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | May 25, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7794
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pressure-regulating valve particularly useful in a diesel internal combustion engine with a closed crankcase is provided. The valve includes a body coupled to a bonnet with an internal movable piston. The movable piston maintains a substantially constant pressure in the crankcase by adjusting a fluid flow in response to changes in pressure. The movable piston also includes an integral relief valve to prevent overpressure in the event of a crankcase pressure in excess of the designed limits of the pressure-regulating valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.