Lockable piston-cylinder unit

US8522934B2 · kind B2 · utility

Assignee

• Stabilus GmbH · DE

Inventor

• Frank Born · Dienethal, DE

Key dates

• Filing date: Mar 19, 2009
• Grant date: Sep 3, 2013
• Expiry date: Mar 19, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/0254
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A lockable piston-cylinder unit includes a cylinder having at least one axially facing counterstop; a piston dividing the cylinder into a first working chamber and a second working chamber; a piston rod extending through the first working chamber to a free end outside the cylinder; and a fastening tube having a first end in which the free end of the piston rod is fixed, a second end which receives the cylinder coaxially, and at least one axially facing supporting stop. When the piston rod is extended to maximum extension, the fastening tube is rotatable relative to the cylinder from a release position, wherein the supporting stop is offset from a respective counterstop, to a locking position, wherein the supporting stop faces the counterstop so that the fastening tube cannot move axially relative to the cylinder.