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:
Aug. 24, 2004
Filed:
Apr. 18, 2003
Hermann Gaessler, Vaihingen, DE;
Udo Diehl, Stuttgart, DE;
Karsten Mischker, Leonberg, DE;
Rainer Walter, Pleidelsheim, DE;
Juergen Schiemann, Markgroeningen, DE;
Christian Grosse, Kornwestheim, DE;
Volker Beuche, Stuttgart, DE;
Stefan Reimer, Markgroeningen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A pressure reservoir is used to exert pressure on a hydraulic system with which, a gas exchange valve, for instance, of an internal combustion engine can be actuated. The pressure reservoir includes a housing and a piston that is prestressed in operation by a device. To enable making the pressure reservoir as small as possible, it is proposed that the device which prestresses the piston of the pressure reservoir has a characteristic force-travel curve, in one range of motion of the piston, that has a slope which differs from the slope in a different range of motion of the piston.