Imperforate bowl: centrifugal separators – Including means or structure for promoting safety
Patent
1998-03-04
1999-04-27
Cooley, Charles E.
Imperforate bowl: centrifugal separators
Including means or structure for promoting safety
494 16, 494 38, 411424, B04B 706, B04B 502
Patent
active
058974822
ABSTRACT:
A rotor lid assembly for a rotor body comprises a lid portion having a centrally depending shank. A bore formed through the shank receives a tie-down stem having a diameter smaller than the bore. A piston-like portion disposed along the stem contacts a periphery of the bore. A venting channel is formed along the shank to allow fluidic flow to and from the bore. The piston portion occludes such flow when the stem is in a first position and permits fluid flow when the stem is in a second position. In one embodiment the lid assembly comprises a lid member and a safety knob, each having a central neck portion and a bore formed therethrough with the neck portion of the knob received in the bore of the lid. A venting channel is formed through both neck portions. A tie-down stem is received in the bore of the knob. The rotor lid assembly provides venting of the rotor body when a negative pressure is created within a chamber of the rotor body and provides a safe venting direction when a positive pressure develops in the rotor chamber so venting can occur without risk to an operator.
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Beckman Instruments Inc.
Cooley Charles E.
Harder P. R.
May William H.
Schneck Thomas
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