Patent · US Expired

Valve actuator for actuating a gas exchange valve of an internal combustion engine

US7360517B2 · kind B2 · utility

0Cited by

4References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Uwe Hammer · Hemmingen, DE
Peter Lang · Gelnhausen, DE
Stefan Reimer · Markgröningen, DE

Key dates

Filing date	Jun 4, 2003
Grant date	Apr 22, 2008
Priority date	—
Expiry date	Jun 4, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2142
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A valve actuator for operating a gas exchange valve of an internal combustion engine has a sleeve-shaped positioning piston which is connected to a valve stem, has at least two shell-shaped wedge pieces enclosing a stem end of the valve stem, whose radially outer peripheral surfaces have a conical segment which tapers off with increasing distance from the gas exchange valve and which is at least partially surrounded by a conical clamping sleeve having a mating conical inner surface and is connected to the positioning piston. The wedge pieces are axially form-fittingly and rotatably connected to a threaded bolt. A threaded segment is provided on the threaded bolt via which the wedge pieces and the conical clamping sleeve are axially attachable to one another.

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