Gas-operated spring

US4982937A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Hans-Gerd Eckel · Hemsbach, DE
• Willi Schweikert · Heidelberg, DE

Key dates

• Filing date: Mar 16, 1989
• Grant date: Jan 8, 1991
• Expiry date: Mar 16, 2009

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60G2800/24
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A gas-operated spring for the mutual support of two oscillating elements moving relative to one another, for which sensor-controlled (9, 10) first and second devices (1, 2) are provided, which bring about the blowing out of excess compressed gas from the gas-operated spring or the feeding in of additional compressed gas into the gas-operated spring (11) through the activation of valves (3, 4, 5). To prevent a mutual impairment of function, the first device (1) is active only for pressure changes of a frequency above a threshold value and the second device (2) only for changes in the mutual correspondence of the two elements (7, 8), which have a frequency below the threshold value.