Pressure fluid cylinder with optional anti-rotation feature

US6637316B2 · kind B2 · utility

Assignee

• Rexroth Mecman GmbH · DE

Inventors

• Heinz-Jürgen Engelke · Diepholz, DE
• Norbert Fortmann · Hannover, DE
• Thomas Liesenhoff · Hannover, DE
• Jens Müller · Neviges, DE

Key dates

• Filing date: Apr 24, 2002
• Grant date: Oct 28, 2003
• Expiry date: Apr 24, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B15/1414
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pressure fluid cylinder with anti-rotation feature, includes a cylinder tube of non-circular inner cross section and a piston which is sealingly received in the tube. The piston has a circular cross section and is connected at one end to a piston rod in coaxial relationship. In order to allow selective use of the pressure fluid cylinder with or without anti-rotation feature, an annular adapter is placed between the piston and the tube and has a circular inner surface area to complement a circular outer surface area of the piston so as to allow a relative rotation between the piston and the adapter. The adapter has a non-circular outer surface area to complement the non-circular inner surface area of the tube. Through insertion of a fastener in aligned boreholes of the adapter and the piston, the adapter and the piston are prevented from rotating relative to one another.