Fluid control valve

US4648420A · kind A · utility

Assignee

• Alfred Teves GmbH · DE

Inventors

• Lothar Kunze · Hofheim, DE
• Rolf Greeb · Kriftel, DE
• Ralf Bender · Oberursel, DE

Key dates

• Filing date: May 13, 1985
• Grant date: Mar 10, 1987
• Expiry date: May 13, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7801
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A control valve with a control slider (9) comprising bead-type areas (17, 18, 19), by means of which the control slider is slidably arranged in the cylinder bore (8). The areas (17) and (18) isolate the inlet (2) from the outlet (3), while the area (19) isolates the outlet (3) from the leakage oil port (4). The clearance between the areas (17) and (18) of the control slider (9) and the wall of the cylinder bore (8) is smaller than the clearance between the area (19) of the control slider (9) and the wall of the cylinder bore (8). The output pressure is kept within close tolerances with only minor leakage losses.