(under the class definition) Apparatus including means responsive to air conditions either in or outside of an enclosure or the air condition in the supply system for the enclosure to maintain a predetermined pressure in said enclosure and/or a difference in pressure between said enclosure and the outside atmosphere.
(1) Note. Systems which maintain enclosures under air pressure but having no air condition responsive automatic controls are in other appropriate subclasses of this class, e.g., those having differential air input and discharge.
SEE OR SEARCH THIS CLASS, SUBCLASS:
238, for pressure regulation of a structure which includes both inlet and outlet airways.
255, for pressure regulation of a structure which includes an inlet airway.
340, for pressure regulation of a structure which includes an outlet airway.
SEE OR SEARCH CLASS 34, Drying and Gas or Vapor Contact With Solids,
92, 287, 402, and 558 for processes and apparatus for maintaining pressure and/or vacuum peculiar to that class and subclass 242 for chamber seals there provided for.
128, Surgery,
205.26, for pressure chambers for therapeutic treatment, including hyperbaric and decompression chambers.
137, Fluid Handling,
494+, particularly subclasses 505+, for regulating valves of general utility.
165, Heat Exchange,
234+, for pressure control of a heated and/or cooled aircraft cabin where specific heating or cooling means are included.
244, Aeronautics,
59, for aircraft cabin pressure control combined with aircraft engine supercharging or with specific aircraft structure.
405, Hydraulic and Earth Engineering,
8+, and 11+ for caissons. 417, Pumps, for pumps and pump regulators responsive to pump effect including such devices where the enclosure is defined by name and no specific relationship between the enclosure and the pump or fan is claimed.
418, Rotary Expansible Chamber Devices, for rotary expansible chamber devices, per se.
