Anti-rotation device for a coupling piston in a switchable component of a valve train of an internal combustion engine
US8375910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2010 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2307/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An anti-rotation device (1) for a coupling piston (2) in a switchable component (3) of a valve train of an internal combustion engine is provided, with the component (3) including two parts (4, 5) that are movable relative to each other. The coupling piston (2) is displaced into a bore (6) of one of the two parts (4) for achieving uncoupling, and the coupling piston (2) comprising, at least on one side (8), a flattened portion (9) starting from a front end (7) of the coupling piston (2) facing another one of the two parts (5), through which flattened portion (9), during a relative movement of the two parts (4, 5), the coupling piston (2) is displaced onto an entraining surface (11) arranged on the another one of the two parts (5) for achieving coupling, the anti-rotation device (1) being configured as a fractional region of an opening (13) of the bore (6) on a bridge component spanning the one part (4), and the coupling piston (2) being guided through its flattened portion (9) on a bowstring-like transverse surface (14) of the bridge component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.