Multiway valve
US5275207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Sep 8, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87772
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multiway valve, in particular a 4/2-way valve, has a housing provided with an axial hole having a plurality of steps to form four seat elements located one behind the other. The housing includes two end chambers and at least two intermediate spaces between these end chambers, with one of the valve connections opening into each. A spool-type drive pin carrying at least two closing elements is located in the axial hole. The drive pin is guided so as to seal at its one end and is radially supported in the axial hole by radial protrusions at its other end. This drive pin has a longitudinal passage which is connected to the first chamber via radial holes at its one end and to the second chamber via its opening provided on the related end of the drive pin at its other end. The closing elements are partially elastically flexible and interact with the seat elements. The closing elements are configured as sleeve-shaped or annular and each has two opposed sealing surfaces which can be laid on one or other seat element of the associated seat element pair depending on the valve position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.