Pumps – Expansible chamber type – Valved piston
Reexamination Certificate
2008-04-01
2008-04-01
Kramer, Devon C. (Department: 3746)
Pumps
Expansible chamber type
Valved piston
C417S555100, C417S552000
Reexamination Certificate
active
07351044
ABSTRACT:
In order to achieve a high level of impermeability with a low closing force for the sealing elements of a multistage piston compressor, the overflow channel (19) in the valve piston (9) opens into at least two passages (26, 27) and the sealing plate of the overflow check valve (20) that is located in the valve piston (9) is configured as a freely guided closing membrane (28) with a limited stroke. The passages (26, 27) of the overflow channel (19) have different diameters, are arranged on a graduated circle at a radial distance from the axis of the closing membrane (28) and are completely covered by the closing membrane (28).
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Antufjew Iwan
Beetz Stefan
Schrödter Marko
Bertheaud Peter J
Continental AG
Kramer Devon C.
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