High pressure fuel supply pump
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United States of America Patent
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Mar 18, 2014
Grant Date -
Jul 19, 2012
app pub date -
Jan 12, 2012
filing date -
Jan 14, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
In a high pressure fuel supply pump for transmitting rotation of a cam to a reciprocating plunger via a tappet and a retainer, a diametric force acting on the plunger is reduced. The pump includes the retainer disposed on the plunger and a return spring exerting an urging force on the retainer in a direction of the tappet. A clearance between a plunger leading end and a tappet bottom surface opposed thereto is set to be greater than a clearance between a retainer bottom surface and the tappet bottom surface opposed thereto, and a clearance between a retainer inside diameter section and a plunger peripheral surface section opposed thereto is set to be greater than a clearance between a retainer outside diameter section and a tappet inner wall opposed thereto.
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