Motor-type fuel pump for vehicle
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United States of America Patent
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-
May 25, 2004
Grant Date -
Jun 12, 2003
app pub date -
Oct 21, 2002
filing date -
Oct 25, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
At a boundary area between a high-pressure portion in which a discharge port of a fuel pump is disposed and a low-pressure portion in which an intake port is disposed, a pressure relief groove extending along the boundary area is formed so as to be communicated with the outside of the pump by pressure relief hole. Alternatively, a slit is formed communicated with the outside. Accordingly, a fuel at a high-pressure area portion can be drained with reliability. Further, by communicating the above pressure relief groove with a positioning pin insertion port, a single hole can serve both as a positioning pin insertion hole and a pressure relief hole.
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