Pumping element for a fluid pump and method

Details Pumping element for a fluid pump and method Pumping element for a fluid pump and method

2008-12-18

2010-10-26

Moulis, Thomas N (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C417S494000, C092S163000

Reexamination Certificate

active

07819107

ABSTRACT:
A pumping element for pressurizing a fluid within a fluid pump includes a plunger reciprocally disposed within a bore defined in a barrel. The plunger and barrel at least partially define a pressurization chamber into which fluid is pressurized. A flow path is defined between the plunger and the bore, the flow path permitting fluid to pass from the pressurization chamber during pressurization of fluid disposed therein. A collection chamber is formed between the plunger and the bore, the collection chamber being disposed adjacent to the bore and being part of a cooling circuit for the pumping element. A plurality of weep openings is defined in the barrel and is fluidly connected to the collection chamber. A reduced diameter portion of the barrel forms an annular reservoir that receives fluid from the weep openings.

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