PCV valve guide
US8356587B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2002 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | Jun 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7932
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A positive crankcase ventilation valve assembly including a housing having a fluid inlet and outlet. A poppet valve is arranged in the housing between the fluid inlet and outlet and is movable in a axial direction between a plurality of positions. The positions respectively define a plurality of fluid flow rates. A plurality of ribs extend radially from either the poppet valve and the housing in an axial direction. The ribs define a bearing surface between the housing and the poppet valve. In this manner, the poppet valve is supported within the housing with a reduced bearing surface area while aligning the poppet valve relative to the housing throughout its movement between the positions. In another embodiment, the poppet valve is eliminated to prevent problems associated with an improperly operating poppet valve. A diaphragm is arranged in the housing between the fluid inlet and outlet. The diaphragm has an orifice, which may be defined by a hole and a plurality of slots extending outwardly from the hole, defining first and second areas, respectively, in first and second positions. The first and second positions respectively define first and second fluid flow rates. The diaphragm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.