Oscillation damper

US5372224A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Otto Samonil · Niederwerrn, DE
• Wolfgang Zirk · Dittelbrunn, DE

Key dates

• Filing date: Feb 5, 1993
• Grant date: Dec 13, 1994
• Expiry date: Feb 5, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F2230/36
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An oscillation damper is provided with a by-pass that includes a by-pass valve. The by-pass valve is switchable between an open position and a closed position. When the by-pass valve is moved between the open and closed positions, the rate of change of the cross-sectional area of the by-pass valve during the time when the by-pass valve is adjacent the closed position is considerably less than the average rate of change of the cross-sectional area during the entire time that it takes for the by-pass valve to switch between the open and closed positions.