Back to results
US 8,978,697 B2Granted
Filter element and control valve for a camshaft adjustment system
AssigneeSchaeffler Technologies AG & Co. KG
InventorsJens Hoppe, Stefan Konias
Life of this patent
Estimating the term…
Abstract
A filter element for a control valve of a camshaft adjuster. The filter element has an annular filter fabric for extracting particles, and a gripping frame for fastening the annular filter fabric. The gripping frame is designed here for the planar bracing of the annular filter fabric on the control valve. Furthermore, a control valve is disclosed for a camshaft adjuster with a corresponding filter element.
Claims12
A filter element for a control valve of a camshaft adjuster, comprising:
- an annular filter fabric for extracting particles;
- and
- a retaining frame for fastening the filter fabric, the retaining frame being a gripping frame having a circumferential inner surface disposed radially outside of the annular filter fabric and configured for planar bracing of the annular filter fabric on a circumferential outer surface of the control valve, such that the annular filter fabric is clamped between the circumferential inner surface of the retaining frame and the circumferential outer surface of the control valve when the filter element is mounted on the control valve,
- the annular filter fabric and the gripping frame being separate elements such that a retaining function of the filter element is decoupled from a filter function of the filter element,
- the annular filter fabric extending continuously along the circumferential inner surface of the retaining frame such that the annular filter fabric forms an innermost surface of the filter element for contacting the control valve continuously along the circumferential outer surface of the control valve, the gripping frame including two ends connectable to attach the annular filter fabric and the gripping frame to the control valve, the annular filter fabric and the gripping frame being separate elements releasably connected to each other.
2 more elements
A control valve for a camshaft adjuster, comprising:
- a tubular valve housing having a radial hydraulic fluid passage opening, and a filter element, which has an annular filter fabric for extracting particles and a retaining frame for fastening the filter fabric, the retaining frame being a gripping frame and being disposed radially outside of the filter fabric;
- and
- a control piston arranged in the valve housing,
- wherein the gripping frame has a circumferential inner surface disposed radially outside the annular filter fabric and configured for planar bracing of the annular filter fabric on a circumferential outer surface of the valve housing,
- the annular filter fabric and the gripping frame being separate elements, such that a retaining function of the filter element is decouple from a filter function of the filter element,
- the annular filter fabric extending continuously along the circumferential inner surface of the retaining frame such that the annular filter fabric faints an innermost surface of the filter element for contacting the valve housing continuously along the circumferential outer surface of the valve housing, the gripping frame including two ends connected together to attach the annular filter fabric and the gripping frame to the valve housing, the annular filter fabric and the gripping frame being separate elements releasably connected to each other on the valve housing.
3 more elements
Dependencies are inferred from the claim text.