The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Dec. 12, 2003
Frank Born, Dienethal, DE;
Rolf Mintgen, Thuer, DE;
Paul Muders, Rhens, DE;
Wilhelm Schwab, Neuwied, DE;
Andre Stein, St. Goar-Werlau, DE;
Frank Born, Dienethal, DE;
Rolf Mintgen, Thuer, DE;
Paul Muders, Rhens, DE;
Wilhelm Schwab, Neuwied, DE;
Andre Stein, St. Goar-Werlau, DE;
Stabilus GmbH, Koblenz, DE;
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.