Patent · US Expired

Switchable valve-drive component

US7363894B2 · kind B2 · utility

4Cited by

3References

6Claims

0Family size

Assignee

Schaeffler KG · DE

Inventors

Matthew Evans · Cambridge, GB
Jermel Jones · Southfield, US
Peter Sailer · Erlangen, DE
Oliver Schnell · Weisendorf, DE
Tim Matthias Hosenfeldt · Nuremberg, DE

Key dates

Filing date	Mar 14, 2006
Grant date	Apr 29, 2008
Priority date	—
Expiry date	May 14, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/2107
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A switchable valve-drive component (1) for variable transmission of a stroke generated by one or more cam projections to a gas-exchange valve of an internal combustion engine is provided. The valve-drive component (1) has transmission elements (3, 4), which can be connected with a positive fit by coupling elements (8) in the transmission direction, in which force transmission surface sections (16) of the coupling elements (8) can be clamped between force transmission surface sections (20) of the transmission elements (3, 4). Here, at least one of the force transmission surface sections (16, 20) should be provided with a wear protection layer (23). This layer comprises at least one metal-free amorphous hydrocarbon layer with sp2-hybridized and sp3-hybridized carbon.

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