Gas spring with end position damping

US4796871A · kind A · utility

Assignee

• Fritz Bauer + Sohne oHG · DE

Inventors

• Hans-Peter Bauer · Altdorf, DE
• Hans J. Bauer · Altdorf, DE
• Ludwig Stadelmann · Altdorf, DE
• Emil Frisch · Altdorf, DE

Key dates

• Filing date: Jun 10, 1987
• Grant date: Jan 10, 1989
• Expiry date: Jun 10, 2007

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/49
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A gas spring with end positions damping has a cylindrical housing filled with a fluid under pressure, in which a piston rod, sealingly extending from one end of the housing, is disposed to be coaxially slideable and on the inner end of which a piston is attached. To create an end position damping that is simple in structure, and which can be used purely pneumatic, purely hydraulic or hydropneumatic, an auxiliary piston in the form of a throttle piston is slidingly disposed on the piston rod, which is supported via an energy accumulator towards the end of the housing where the piston rod exits. The piston abuts against this auxiliary piston at the end of the extension movement of the piston rod. Its throttle effect is larger during movement in the direction toward the end where the piston rod exits than in the opposite direction.