Fluid handling – Removable valve head and seat unit – Pump type
Reexamination Certificate
2007-11-06
2007-11-06
Rivell, John (Department: 3753)
Fluid handling
Removable valve head and seat unit
Pump type
C137S454500, C137S542000, C137S809000
Reexamination Certificate
active
10537544
ABSTRACT:
A check valve having a valve housing inserted into a receptacle in which housing a pistonlike valve member is guided longitudinally displaceably and cooperating with a valve seat on the valve housing. The valve member is urged in the closing direction by a prestressed closing spring and in the opening direction by the pressure prevailing in an inlet, and the valve member is inserted into the valve housing from the side of the valve seat. The valve housing is embodied in one piece and is embodied as cup-shaped and has both a bottom and a jacket region that defines a recess. With the open end of its recess, the valve housing points out of the receptacle, and the valve seat is located on the bottom of the valve housing, facing away from the recess. With a shaft, the valve member protrudes through a bore in the bottom into the recess in which the closing spring is located.
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Aleker Jochen
Bredow Falko
Distel Matthias
Kiel Waldemar
Koehler Achim
Greigg Ronald E.
Rivell John
Robert & Bosch GmbH
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