Fluid handling – Systems – Dividing into parallel flow paths with recombining
Patent
1999-07-19
2000-12-12
Hepperle, Stephen M.
Fluid handling
Systems
Dividing into parallel flow paths with recombining
13760121, F16K 3106
Patent
active
061584630
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to brake systems and more particularly relates to an electromagnetic valve arrangement for slip-controlled automotive vehicle brake systems.
BACKGROUND OF THE INVENTION
German patent application No. 42 30 393 discloses a valve arrangement of the same type which establishes a direct pressure fluid connection (by way of a parallel connection of a spherical non-return valve to another electromagnetically actuatable valve closure member) between a pressure fluid channel connected to a pressure fluid user and another pressure fluid channel connected to the pressure fluid source as soon as the hydraulic opening pressure of the non-return valve exceeds the closing pressure. The spherical non-return valve causes undesirably great structural efforts. Disadvantages are not only due to the overall height of the valve arrangement but also to actions necessary for fixing and sealing the spherical non-return valve.
An object of the present invention is to provide a compact valve arrangement which permits an easy manufacture and assembly and ensures reliability in operation without restrictions.
BRIEF DESCRIPTION OF THE INVENTION
FIG. 1 is a cross-sectional view of the valve arrangement of the present invention.
FIG. 2 is a top view of the non-return valve shown in FIG. 1.
FIG. 3 is an alternative embodiment for arranging a non-return valve in the valve-accommodating member.
FIG. 4 is an alternative embodiment of the value seat member.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 shows a considerably enlarged sectional view of a valve arrangement, comprised of a rotationally symmetrical valve housing 12 having a valve-accommodating bore 8 in which a disc-shaped valve seat member 4 and a disc-shaped non-return valve 1 are fastened. The attachment of both parts may preferably be performed by way of calking of the valve housing 12. In the present embodiment, calking of the housing material causes the valve seat member 4 to press the non-return valve 1 against a step of the valve-accommodating bore 8. FIG. 1 shows the closed position of the non-return valve 1 in which the sealing surface 6 facing the valve seat member 4 closes the bypass openings 5 in the valve seat member 4 with its full surface. Exclusively the centrally disposed flow opening 2 in the non-return valve 1 overlaps the opening 3 of the valve seat member 4 which is positioned between the bypass openings 5 in order to establish an unimpeded pressure fluid connection between the pressure chambers placed upstream and downstream of the valve seat member 4 in the open position of the valve closure member 7. The valve closure member 7 is arranged on the valve seat member 4 on the side remote from the non-return valve 1 and, when energized electromagnetically, closes the opening 3 which is bypassed in the presence of a corresponding hydraulic pressure difference on the non-return valve 1 by the sealing surface 6 lifting from the bypass openings 5. A pressure fluid connection between the pressure chambers positioned upstream and downstream of the valve seat member 4 is then permitted by way of the central flow opening 2 and alongside the slot 11 in the non-return valve 1.
With reference to FIG. 1, the embodiment of FIG. 2 shows exclusively the non-return valve 1 according to the present invention in a top view so that the slot 11, which can initially be seen only as a bore in the non-return valve 1 in FIG. 1, is now clearly visible as an opening which extends in the shape of a circle segment. This circle-segment-shaped slot 11 delimits the central portion which forms the actual disc-shaped sealing surface 6 and includes the flow opening 2 as a central opening. Extending at the end of the slot 11 is an elastic web-shaped portion 10 which connects the central portion to a fastening ring 9. Thus, the non-return valve 1 has a first external portion which acts as fastening ring 9 and is connected to the central portion with sealing surface 6 by way of the elastic second web-shaped portion 10. The central p
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Dewachter Willy
Goossens Andre F.
Hoffmann Alois
Rottiers Antoine
Continental Teves AG & Co. OHG
Hepperle Stephen M.
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