Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Reexamination Certificate
2005-04-05
2005-04-05
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
C137S554000
Reexamination Certificate
active
06874530
ABSTRACT:
A metering unit for metering liquid and/or gaseous educts by means of a feed pump for a fuel cell system, including at least one lead line for delivering an educt flow, at least one control piston, and a differential pressure valve for regulating the educt flow; the differential pressure valve has a regulatable throttling cross section, which is variable automatically, as a function of a flow pressure dictated by the control piston, in order to regulate the educt flow. The lead line leads to the control piston, and between the control piston and the differential pressure valve a first and a second connecting line are provided.
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Bareis Marc
Benninger Nikolaus
Harndorf Horst
Ilgner Frank
Nau Michael
Greigg Ronald E.
Hepperle Stephen M.
Robert & Bosch GmbH
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