Check valve
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United States of America Patent
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-
Mar 13, 2001
Grant Date -
N/A
app pub date -
Mar 8, 1996
filing date -
Dec 28, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A check valve which is positioned in the vacuum air line of an internal combustion engine. The check valve includes a single-piece valve body having an outlet port and two or more inlet ports, with one outlet port located substantially in line with the inlet port and connected by a venturi tube. The second inlet port is separated from the main air flow line by the valve stem and a diaphragm which allows communication there between and prevents back pressure. The second inlet port communicates with the outlet port through the valve stem and a second venturi tube which provides a vacuum boost to a device, usually vehicle brakes, connected to the inlet.
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