Reducing agent pump for an exhaust-gas aftertreatment system...

Details Reducing agent pump for an exhaust-gas aftertreatment system... Reducing agent pump for an exhaust-gas aftertreatment system...

2008-01-08

2008-01-08

Freay, Charles G (Department: 3746)

Pumps

Condition responsive variable volumetric capacity expansible...

C417S417000, C092S060500, C092S169100

Reexamination Certificate

active

07316545

ABSTRACT:
A reducing agent pump has a pump inlet part and a pump outlet part closing off the pump body at its ends. One or both of the inlet and outlet parts is of two-part construction, with a closure element and another element. The two elements are prestressed relative to one another with a spring element, so that in the event of a pressure which exceeds the spring force of the spring element, a relative movement can be carried out between the two elements of the two-part member. This makes it possible to absorb an increase in the volume of the reducing agent inside the pump body caused by freezing and therefore to prevent damage to the reducing agent pump.

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