Pipes and tubular conduits – Combined – With end structure
Reexamination Certificate
2011-06-28
2011-06-28
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Combined
With end structure
C138S155000, C138S172000, C285S016000, C285S055000
Reexamination Certificate
active
07967031
ABSTRACT:
A delivery pipe (1) for the transport of solids is described. The delivery pipe (1) has a double-layer pipe body (2) which has a coupling collar (7, 8) on the inlet-side pipe end (5) and on the outlet-side pipe end (6). A first wear ring (9) and a second wear ring (10) are provided in succession in the longitudinal direction of the pipe body (2) in the region of the inlet-side coupling collar (7). The second inner wear ring (10) has a length (L) which is sized greater than or equal to half the internal diameter (ID) of the pipe body (2). As a result, wear phenomena can be reduced in the inlet-side region of the delivery pipe (1) and the service life of the delivery pipe (1) can be increased considerably.
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Brinson Patrick F
Day Ursula B.
Esser-Werke GmbH & Co.KG
Feiereisen Henry M.
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