Piston for a hydraulic dashpot, and method of manufacturing such a piston

US6868947B2 · kind B2 · utility

Assignee

• Krupp Bilstein GmbH · DE

Inventors

• Jurgen Adamek · Ennepetal, DE
• Thomas Sasse · Ennepetal, DE
• Manfred Diederich · Bereborn, DE
• Axel Gaillard · Breckerfeld, DE
• Heribert Justinger · Kell am See, DE
• Alfred Mathony · Trier, DE
• Christian Satzek · Wuppertal, DE
• Stefan Schwindling · Kell am See, DE
• Bernd Stichler · Ludwigsburg, DE

Key dates

• Filing date: Oct 16, 2001
• Grant date: Mar 22, 2005
• Expiry date: Apr 25, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/516
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A piston for a hydraulic dashpot. The piston (1) is mounted on one end of a piston rod (3), travels back and forth inside a cylinder (2), which it divides into two chambers (4 & 5), and has a body (10) provided with axial channels (6 & 7), each of which can be opened and closed at the end by a one-way valve in the form of a cup spring or stack of cup springs (8 & 9), independently adjusting their tensions for both the compression and the suction phases. The cup springs (8 & 9) rest against and in alignment with the body, and the tension is adjusted by deforming the body resiliently or plasticly against its contact surface.