Spool valve
US6651574B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2002 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jan 11, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63H20/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A valve includes a housing with an elongated bore having a longitudinal axis and a spool reciprocatingly mounted within the bore for relative movement along the bore parallel to the axis. The housing has a housing passageway and the spool has a spool passageway. The passageways align in at least one axial position of the spool along the bore, whereby fluids can pass between the spool and the housing. The passageway of one of the spool or the housing includes a first groove which extends parallel to the axis, but not substantially about said one of the spool or the housing. The passageway of another of the spool or the housing includes a second groove which extends circumferentially about said another of the spool or the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.