PUMP HEAD FOR A FUEL PUMP
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United States of America Patent
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Issued Date -
Jan 15, 2015
app pub date -
Jan 29, 2013
filing date -
Jan 30, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A pump head for a high-pressure fuel pump is disclosed. The pump head comprises a head housing including a body portion, and a turret portion extending from the body portion, a pumping chamber defined within the body portion, a pumping element bore for receiving a pumping element in use, the pumping element bore extending from the pumping chamber and through the turret portion, and a leakage return passage. The pump head further comprises a sleeve arranged around the turret portion to define a leakage flow path to allow fuel flow from the pumping element bore to the leakage return passage. The pump head is suitable for use in a fuel pump of the type in which a cam drive arrangement of the pump is lubricated by engine oil, since contamination of the engine oil with fuel can be minimised.
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