Patent · US Expired

Piston/cylinder unit

US7048100B2 · kind B2 · utility

0Cited by

7References

29Claims

0Family size

Assignee

Stabilus GmbH · DE

Inventors

Frank Born · Dienethal, DE
Rolf Mintgen · Peitz - Picnjo, DE
Paul Muders · Rhens, DE
Wilhelm Schwab · Neuwied, DE
Andre Stein · Berlin, DE

Key dates

Filing date	Dec 12, 2003
Grant date	May 23, 2006
Priority date	—
Expiry date	Dec 12, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F9/516
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A piston/cylinder unit has a closed cylinder with a piston axially displaceably guided therein. The piston divides the cylinder interior into first and a second working spaces which are both filled with a fluid. A first nonreturn valve is arranged in the piston having a closing element of which is force-loaded in the closing direction. At least a portion of the first nonreturn valve is exposed to pressure in the first working space. A second nonreturn valve is also arranged in the piston and also has a closing element of which is force-loaded in the closing direction. The surface of the closing element of the first and/or second nonreturn valve acted upon by the pressure of the respective working spaces can be enlarged during the opening stroke of said nonreturn valve.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.