Patent ID: 7040320
Filing Date: 2006-05-09
Classification: A61M,F16K,Y10T

Abstract:
1. A valve device for controlled supply of a pressure fluid, comprising a housing ( 2 ) having a supply chamber ( 3 ) for the supply of a pressure fluid from an inlet ( 4 ) connected to a pressure fluid source, and having an outlet ( 5 ) communicating with the supply chamber ( 3 ) via an outlet valve ( 6 ), characterised in that the valve device comprises a reference chamber ( 10 ) connected to the outlet ( 5 ) through a narrow, leakage-forming duct ( 11 ), a regulating unit ( 12 – 14 ) adapted to keep the supply chamber ( 3 ) permanently pressurised at a value just above the pressure in the reference chamber ( 10 ), and a control valve ( 20 ) having a valve body ( 21 ) for opening and closing of a passage ( 19 ) between the supply chamber ( 3 ) and the reference chamber ( 10 ), the valve body ( 21 ) being arranged to be influenced by an external force for opening of the passage ( 19 ), and to be influenced by a closing force determined by the pressure in said chambers ( 3 , 10 ) at the cessation of the external force influence, the outlet valve ( 6 ) being a one-way valve having a predetermined opening pressure.