Patent · US Active

Switchable cup tappet

US8256394B2 · kind B2 · utility

1Cited by

9References

19Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Michael Haas · Weisendorf, DE
Mario Kuhl · Herzogenaurach, DE
Norbert Nitz · Erlangen, DE

Key dates

Filing date	Feb 1, 2008
Grant date	Sep 4, 2012
Priority date	—
Expiry date	Feb 5, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01L13/0005
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A switchable cup tappet for a valve timing mechanism of an internal combustion engine, which has a cup basic body with an annular base loaded by large-lift cams. A hollow-cylindrical projection protrudes from an inner edge of the base and an inner body extends in the hole of the projection. The disc-like base is contacted by a small-lift cam. In a hole of the inner body two coupler pistons are coupled in sections with a driver surface of the cup basic body for a large valve stroke. The small stroke occurs by complete displacement into the radial hole. An annular web, spaced from its end faces at both ends, is attached integrally, in which the radial hole extends with the coupler pistons. The driver surface for the pistons is formed by a lower edge of the projection, which is spaced from the bases.

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