HYDRAULIC MEDIUM INSERT FOR A CONTROL VALVE IN A HYDRAULIC ACTUATOR

• US 20100327209A1
• Filed: 01/24/2009
• Published: 12/30/2010
• Est. Priority Date: 01/26/2008
• Status: Abandoned Application

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies GmbH & Co. KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Hoppe, Jens, Konias, Stefan
• Application Number:
  US12/864,299
• Publication Number:
  US 20100327209A1
• Time in Patent Office: Days
• US Class Current: 251/366
• CPC Class Codes: F01L 1/34 characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
• CPC Class Codes: F01L 1/46 Component parts, details, or accessories, not provided for in preceding subgroups
• CPC Class Codes: F01L 2001/34426 Oil control valves
• CPC Class Codes: F01L 2001/3443 Solenoid driven oil control valves
• CPC Class Codes: F01L 2001/3444 Oil filters

Abstract

A hydraulic medium insert for a control valve in a hydraulic actuator which has a tubular guide sleeve for guiding a control piston, which is disposed in a receptacle, which has passage openings for the hydraulic medium, which are disposed in the guide sleeve and separated by webs. A plastic part is disposed on the exterior side of the guide sleeve and has sealing webs, which are supported on the inside on the webs of the guide sleeve, which separate the passage openings, and press against the inside of the receptacle to form a seal on the outside.

Claims

1. A hydraulic medium conducting insert for a control valve in a hydraulic actuating device, comprising:

a tubular guide sleeve for guiding a control piston, which guide sleeve is disposed in a receptacle, having passage openings for a hydraulic medium, which are disposed in the guide sleeve and separated by webs,

wherein a plastic part is disposed on an exterior side of the guide sleeve, the plastic part having sealing webs, which are supported on an inside on webs of the guide sleeve, which separate the passage openings, and on the outside rest against an inside of the receptacle to form a seal.

2. The hydraulic medium conducting insert of claim 1, wherein the hydraulic medium conducting insert has an integrated filter fabric.

3. The hydraulic medium conducting insert of claim 1, wherein the guide sleeve and the plastic part are connected to one another by way of positive engagement in a longitudinal direction of the guide sleeve.

4. The hydraulic medium conducting insert of claim 1, wherein the passage openings are disposed in annular grooves provided on the exterior side of the guide sleeve.

5. The hydraulic medium conducting insert of claim 1, wherein the plastic part is formed by an overmolding.

6. The hydraulic medium conducting insert of claim 1, wherein the plastic part can be secured on the guide sleeve by means of a latching joint.

7. The hydraulic medium conducting insert of claim 1, wherein the plastic part is secured on the guide sleeve by means of a press-fitting and/or adhesively bonded joint.

8. The hydraulic medium conducting insert of claim 1, wherein the guide sleeve has a connection piece at one end, and the connection piece has an axial bore for entry of hydraulic medium and/or for connection of an actuator.

9. The hydraulic medium conducting insert of claim 7, wherein the connection piece is connected positively to the plastic part.

10. The hydraulic medium conducting insert of claim 8, wherein the connection piece and the plastic part are connected to one another in such a way that the guide sleeve is held between the connection piece and the plastic part.