Conveyors: fluid current – Blower or pump having load intake opening in housing – Having separate opening in housing for conveying fluid input
Reexamination Certificate
2004-07-07
2008-08-12
Hess, Douglas A (Department: 3651)
Conveyors: fluid current
Blower or pump having load intake opening in housing
Having separate opening in housing for conveying fluid input
C406S091000, C406S109000, C406S123000, C406S153000
Reexamination Certificate
active
07410329
ABSTRACT:
A device for conveying powders through pipelines including at least one pumping device which in turn includes a suction inlet and a delivery outlet and a tubular chamber with opposite ends connected respectively to the suction inlet through an input valve and to the delivery outlet through an output valve. A vacuum source and a pressure source are connected upon command to the chamber in axially distanced positions to create a vacuum respectively and alternatively in the chamber in relation to the environment upstream of the device and a pressure in relation to the environment downstream of the device.
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Geico S.p.A.
Hess Douglas A
Jacobson & Holman PLLC
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