Controllable pressure-reducing valve and device for the generation of pressure change signals
US8042572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2008 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | May 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87877
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A controllable pressure reducing valve has a housing which includes an inner chamber extending in the direction of a longitudinal axis and an inlet opening and an outlet opening. The inlet opening and the outlet opening open into the inner chamber at an axial relative distance. The inner chamber includes between the mouths of the inlet opening and the outlet opening at least one annular wall having a cylindrical valve bore. An axially movable valve body which is arranged in the inner chamber, extends through the valve bore and has a piston-type portion guided in the valve bore and adapted to close the valve bore. The piston-type portion includes at least one control recess bounded by a control step which extends in axial direction and in circumferential direction and combines with an edge of the valve bore to form a controllable valve opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.