US PATENT SUBCLASS 414 / 217
APPARATUS FOR MOVING MATERIAL BETWEEN ZONES HAVING DIFFERENT PRESSURES AND INHIBITING CHANGE IN PRESSURE GRADIENT THEREBETWEEN

Current as of: June, 1999
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414 /   HD   MATERIAL OR ARTICLE HANDLING

217APPARATUS FOR MOVING MATERIAL BETWEEN ZONES HAVING DIFFERENT PRESSURES AND INHIBITING CHANGE IN PRESSURE GRADIENT THEREBETWEEN {3}
218  DF  .~> Including screw conveyor
219  DF  .~> Including trap chamber having horizontal axis of rotation {1}
221  DF  .~> Including serially arranged valves in path having a vertical component (e.g., airlocks, etc.)

DEFINITION

Classification: 414/217

APPARATUS FOR MOVING MATERIAL BETWEEN ZONES HAVING DIFFERENT PRESSURES AND INHIBITING CHANGE IN PRESSURE GRADIENT THEREBETWEEN:

(under the class definition) Apparatus comprising means to move or enable gravity movement of material from a region having a particular pressure to a region having another pressure and prevent or significantly retard any change in the pressure differential between the regions.

(1) Note. There may be one means for moving or enabling gravity movement of material and another for inhibiting pressure change, which means are separably identifiable, or there may be a means which accomplishes both functions but which does not consist of separate and distinct components or devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

805, for a process of moving material between zones having different pressures and inhibiting change in pressure gradient therebetween.

SEE OR SEARCH CLASS

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

129+, for apparatus of that class for carrying out a reaction in which a catalyst (e.g., solid material in granular form) is employed, which apparatus may include zones of different pressures.