Patent · US Expired

Pressure reservoir for exerting pressure on a hydraulic system, with which preferably a gas exchange valve of an internal combustion engine is actuated

US6779496B2 · kind B2 · utility

2Cited by

6References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Hermann Gaessler · Leinfelden, DE
Udo Diehl · Stuttgart, DE
Karsten Mischker · Leonberg, DE
Rainer Walter · Pleidelsheim, DE
Juergen Schiemann · Markgröningen, DE
Christian Grosse · Kornwestheim, DE
Volker Beuche · Stuttgart, DE
Stefan Reimer · Markgröningen, DE

Key dates

Filing date	Apr 18, 2003
Grant date	Aug 24, 2004
Priority date	—
Expiry date	Apr 18, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86051
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

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