Hydraulic control system with one-way orifice for automatic transmissions
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United States of America Patent
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Sep 14, 1999
Grant Date -
N/A
app pub date -
Feb 24, 1997
filing date -
Feb 29, 1996
priority date (Note) -
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Abstract
A hydraulic control system for automatic transmissions includes a separate plate interposed between valve bodies and formed with a first hole for fluid communication between the valve bodies. A cup is disposed in one of the valve bodies, having a bottom biased to contact the separate plate. The bottom of the cup is formed with a second hole which fluidly communicates with the first hole. The second hole is smaller in radial dimension than the first hole, and includes two truncated-cone holes with a minimum-diameter portion.
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