Hydraulic valve
US5129618A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Apr 24, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/0405
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An hydraulic valve of the flow-controlled type and including a valve housing provided with an inlet and an outlet and a valve body which is intended to coact with a valve seat in a manner to open and interrupt the connection between the inlet and outlet in dependence on a continuously controllable pilot flow in a pilot-flow channel extending from a pilot-flow chamber located on the side of the valve body remote from the valve seat to the outlet in the flow direction after the valve body. The pilot-flow chamber, in turn, communicates with the inlet via a variable constriction. For the purpose of simplifying this type of valve and rendering the valve more compact, the valve body is arranged in a recess which extends to the valve seat and which is formed concentrically with the valve seat. The recess is formed in a seat-part which incorporates one or more slots which are open towards the recess and which discharge into the pilot-flow chamber. The seat-part also includes at least one inlet port which communicates with the inlet and which also communicates with the slot or slots, such as to form the variable constriction, thereby providing a facility in which the valve body can be moved…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.