Imperforate bowl: centrifugal separators – Rotatable bowl – Including driven material-moving means therein
Reexamination Certificate
2006-05-30
2006-05-30
Cooley, Charles E. (Department: 1723)
Imperforate bowl: centrifugal separators
Rotatable bowl
Including driven material-moving means therein
C494S056000, C494S065000, C210S376000
Reexamination Certificate
active
07052451
ABSTRACT:
A centrifugal separator includes a cylindrical bowl having a conical lower end with an opening through which feed liquid is injected during a feed mode of operation. The feed liquid is separated into centrate and solids, which accumulate along the inner surface of the bowl. A piston assembly includes a conical piston coupled to a piston actuator by a two-part piston shaft. During the feed mode of operation, the piston shaft is disconnected, the piston is held in an uppermost position by hydraulic pressure from the feed liquid, and a centrate valve on the piston is urged open to permit the centrate to flow out to a centrate discharge port. In a solids discharge mode of operation, the piston shaft is connected and the piston actuator urges the piston axially downward, closing the centrate valve and forcing the accumulated solids from the bowl via the opening in the conical lower end of the bowl.
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Cooley Charles E.
Wagner Development Inc.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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