Flow control valve

US4252141A · kind A · utility

Assignee

• ITT Industries · US

Inventors

• Jochen Burgdorf · Mühlheim am Main, DE
• Ludwig Budecker · Frankfurt am Main, DE
• Klaus Winter · Troy, US
• Anton David · Dreieich, DE

Key dates

• Filing date: May 5, 1980
• Grant date: Feb 24, 1981
• Expiry date: May 5, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7852
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The valve includes a control piston axially slidable in a cylindrical bore which controls the cross-sectional area of an orifice of a connection between the cylindrical bore communicating with a pressure port and a user port. The control piston is acted on by a spring and a pressure which is reduced relative to the pressure at the pressure port. A cushioning arrangement acting on the control piston avoids occurrence of pressure surges affecting the control piston behavior.