Piston cylinder device

US6536330B2 · kind B2 · utility

Assignee

• Volvo Personvagnar AB · SE

Inventors

• Tommy Karlsson · Göteborg, SE
• Malte Isaksson · Skara, SE

Key dates

• Filing date: Jan 24, 2001
• Grant date: Mar 25, 2003
• Expiry date: Jan 24, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F2226/02
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An arrangement for a piston-and-cylinder unit is disclosed. The arrangement includes a cylinder member and a piston member movable therein, to which a piston rod is connected. The cylinder member includes a barrel pipe and closure portions at each end of the cylinder member, with the closure portion at one end exhibiting a bush. The bush is provided with a through bore for the piston rod and is enclosed by an end portion of the barrel pipe. The end portion is bent radially inwards, towards the piston rod and over a first circumferential surface of the bush. The bush is provided with a collar portion exhibiting an external second circumferential surface of the bush, enclosing the circumference of the piston rod and extending axially beyond the inwardly bent portion. The inwardly bent portion of the barrel pipe terminates in a circumferential edge located adjacent to a positive corner of the bush formed between the first circumferential surface and the second circumferential surface.