Appeal 2007-1722
Application 10/212,919
SUMMARY OF DECISION
We AFFIRM.
THE INVENTION
Appellants claim a slurry pump having a diverter which is said to direct
particles away from a stationary face and impeller nose gap to reduce wear.
(Specification 1: 9-11)
Claim 21, reproduced below, is representative of the subject matter on
appeal.
21. A diverter for reducing particulate wear in a slurry pump having
a suction liner, an impeller with a front shroud, and a nose gap
between the suction liner and the front shroud of the impeller, the
diverter comprising:
(a) a suction liner face having a protrusion formed upstream of
the nose gap, the protrusion extending inwardly toward the front
shroud of the impeller and terminating in a substantially rounded tip;
(b) an impeller front shroud being operatively opposed to the
suction liner face, a rounded relief formed within the front shroud; and
(c) the rounded tip of the protrusion extending into the rounded
relief of the front shroud, wherein particulate matter is deflected away
from the suction liner face.
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