Shock absorber with a check valve module and a check valve module for a shock absorber

US5467851A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Gunter Handke · Euerbach, DE
• Lars Rossberg · Schweinfurt, DE
• Andreas Zietsch · Röthlein, DE

Key dates

• Filing date: Mar 15, 1994
• Grant date: Nov 21, 1995
• Expiry date: Mar 15, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87394
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Shock absorber with adjustable damping force, comprising a cylinder, an axially movable piston rod with a piston connected to it, a number of fluid chambers with capacities which can be changed relative to one another as a function of the movement of the piston rod relative to the cylinder, and fluid connections between at least two of the fluid chambers, whereby at least one of the fluid connections has a check valve module, whereby the check valve module is also designed with at least one valve seat, whereby a valve check element can be elastically applied against the valve seat in a check position, whereby this valve check element can also be adjusted by means of a field coil in opposition to the closing force of at least one spring in a number of positions, whereby the spring(s) is/are a unit of a row inside the check valve module, and possibly an intermediate module, which consists of a control chamber discharge valve body and a supplemental discharge valve body, characterized by a connection (17, 29, 15a, 15c, 19a, 19c, 25a, 25c, 27a, 27c, 37a, 37c) between any of the springs (29, 17) and inside the row of adjacent components of the spring(s), so that the adjacent parts form …