NON-RETURN VALVE AND HYDRAULIC VALVE WITH A FITTED NON-RETURN VALVE

• US 20130118622A1
• Filed: 03/23/2011
• Published: 05/16/2013
• Est. Priority Date: 07/26/2010
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Patzold, Holger, Pluta, Barbara, Bittel, Philipp
• Granted Patent: US 9,046,181 B2
• Time in Patent Office: Days
• US Class Current: 137/855
• CPC Class Codes: F01L 1/3442 using hydraulic chambers with variable volume to transmit the rotating force
• CPC Class Codes: F01L 2001/34426 Oil control valves
• CPC Class Codes: F01L 2001/3443 Solenoid driven oil control valves
• CPC Class Codes: F01L 2001/34433 Location oil control valves
• CPC Class Codes: F16K 15/14 with flexible valve members
• CPC Class Codes: F16K 15/144 the closure elements being fixed along all or a part of their periphery
• CPC Class Codes: F16K 15/16 with tongue-shaped laminae
• CPC Class Codes: Y10T 137/7891 Flap or reed

Abstract

A non-return valve (8) having a sealing seat (2) having an opening (16) and also a resilient, flat closing element (10), which covers the opening (16) in a closed position. In view of simple assembly of the non-return valve (8), the closing element (10) and the sealing seat (12) are connected fixedly to one another and form a prefabricated structural unit (13).

Claims

1. A non-return valve comprising a seal seat with an opening and a spring-like, flat closing element that covers the opening in a closed position, the closing element and the seal seat are connected rigidly to each other and form a prefabricated structural unit.

2. The non-return valve according to claim 1, wherein the closing element comprises at least one bending web having a closing plate on a first end for the opening, and a second, fixing end.

3. The non-return valve according to claim 2, wherein the fixing end comprises at least one fixing-arm.

4. The non-return valve according to claim 1, wherein the closing element is made from spring steel.

5. The non-return valve according to claim 1, wherein the seal seat is an injection molded part.

6. The non-return valve according to claim 2, wherein the fixing end of the closing element is injection molded with material of the seal seat.

7. A hydraulic valve for controlling flows of pressurized medium in a camshaft adjuster, comprising a hollow valve housing with at least one feed connection (P) and at least one discharge connection (T), and a non-return valve according to claim 1, is located in the valve housing.

8. A non-return valve according to claim 1, wherein a pressurized medium filter is integrated in the seal seat.