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Valve device for controlled supply of a pressure fluid

  • US 7,040,320 B2
  • Filed: 12/12/2000
  • Issued: 05/09/2006
  • Est. Priority Date: 12/13/1999
  • Status: Expired due to Term
First Claim
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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.

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