Piston with central valve for hydraulic brake systems
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United States of America Patent
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Dec 12, 1995
Grant Date -
N/A
app pub date -
Jan 7, 1994
filing date -
May 7, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention relates to a piston with a central valve, in particular for hydraulic boosters, the valve case (6) which is composed of a supporting insert (8) radially embraced by a valve seat (7). It is disadvantageous in some valve cases that sometimes the positive coupling between the two elements in axial direction is not sufficient. The present invention provides a remedy to this problem by using undercuts behind which the valve seat engages the supporting insert in both directions. In an advantageous improvement, the valve insert is of symmetrical design, and a sealing projection is shaped at the valve seat. The guidance of the valve tappet (19) is performed within the piston (1).
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