Piston rod with an integral piston for a shock absorber

US4508201A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Ludwig Axthammer · Diez, DE
• Felix Wossner

Key dates

• Filing date: May 26, 1982
• Grant date: Apr 2, 1985
• Expiry date: May 26, 2002

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F9/3214
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a cylinder piston device having an axis and two end walls, a cavity is defined between the two end walls. A piston rod is axially movable with respect to the cylinder member and passes through one of the end walls. The piston rod is at least partially defined by a piston rod tube. A piston unit is defined by a radially widened portion of the piston rod tube. The piston unit separates the cavity into two working chambers adjacent respective end walls, one of the working chambers being an annular working chamber radially extending between a radially outer surface of the piston rod and a radially inner surface of the cylinder member. Fluid passages extend between the working chambers across the piston unit. The fluid passages includes at least one opening extending through the piston rod tube.