US PATENT CLASS 454
Class Notes
Current as of: June, 1999
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DEFINITION
Classification: 454/
This is the parent class for apparatus and processes for supplying air to and removing it from enclosures, for distributing and circulating the air therein, or for preventing its contamination.
REFERENCES TO OTHER CLASSES
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2, Apparel,
171+, for head coverings (e.g., hats) which may include ventilation.
4, Baths, Closets, Sinks, and Spittoons, appropriate subclasses for ventilation of devices forming the subject matter of that class, particularly,
209+, and 306 for ventilation of urinals; subclasses 347+ for ventilation of flush closets; and subclasses 472, 475, 477, and 482 for ventilation of dry closets.
5, Beds, 706+, for ventilation of a mattress.
34, Drying and Gas or Vapor Contact With Solids, appropriate subclasses for ventilation processes and apparatus combined with added steps or means to cause drying or gas or vapor contact with solids.
36, Boots, Shoes, and Leggings,
3, for ventilation of boots or shoes.
52, Static Structures (e.g., Buildings)
198+, for structure forming an enclosure for or a cover over a room or compartment and having a fluid guiding port in an outer barrier communicating between the space and ambient, subclass 200 for an enclosure located on and within the periphery of a roof and having an open bottom or passage communicating with the space beneath the roof (e.g., cupola), subclasses 204.5+ for passageways which traverse a barrier and which allow passage of air, subclass 218 for a flue with gaseous fluid directing features, and subclass 219 for a flue connection to building structures.
62, Refrigeration, appropriate subclasses for ventilated rooms or chambers in combination with cooling or refrigeration means specialized to refrigeration. The mere inclusion of a cooler for the air or means subjecting the air to air-liquid contact is not considered a means specialized to refrigeration.
95, Gas Separation: Processes, for processes of gas separation, per se, in which dust or other contaminants are removed from air.
96, Gas Separation: Apparatus, for apparatus for gas separation, per se, in which dust or other contaminants are removed from air.
105, Railway Rolling Stock,
350+, for passenger car constructions tending to lessen the dust contents of the air in the vicinity of car doors and windows.
114, Ships, 187, for steamboat stacks and chimneys specially adapted to use on vessels and subclasses 211+ for ventilating devices specific to ships and involving the structure of the ship.
126, Stoves and Furnaces, appropriate subclasses for the combination of ventilating and heating wherein significant heating structure (i.e., more than a nominal recitation such as a broadly recited "heating means") is claimed. See
specifically
21+, for ventilated ovens, subclasses 67+ for heating stoves provided with means for heating and circulating a current of air, subclass 80 for heating stoves provided with special ventilating attachments or features, subclasses 99+ for furnaces which heat air in an enclosing case or jacket to be distributed to points remote from the furnace, subclass 113 for the combination of an air moistener with a hot air furnace, subclass 198 for oven doors provided with means for ingress and egress of air, subclass 279 for ventilating platforms for stoves and furnaces, subclass 287.5 for fusible release-type stove or furnace dampers, subclass 293 for the combination of a smoke-controlling damper and a ventilating damper which are interconnected so that the movement of one operates to move the other, subclasses 299+ for stove hoods designed to carry off odors from kitchen ranges, subclass 312 for stovepipe ventilation, subclass 313 for air moistening attachments to stovepipes, subclass 316 for a combined stove pipe thimble and ventilator, and subclass 508 for a fireplace with a room humidifier.
128, Surgery,
205.26, for ventilating chambers usable by a patient such as oxygen tents and hyperbaric chambers.
135, Tent, Canopy, Umbrella, and Cane,
93+, for ventilation of a portable structure (e.g., tent).
137, Fluid Handling,
216, for vents in fluid lines to prevent backflow (e.g., antisyphon devices).
160, Flexible or Portable Closure, Partition, or Panel, for ventilating devices (1) in the form of panels in which a flexible fabric or other flexible sheet material forms the panel portions; (2) in the form of panel units formed of plural strips, slats, or panels interconnected for relative motion (excluding those connected only by a common operator or mounted on a common support); (3) panels in the form of portable partitions, and (4) parts (1) - (3) combined with each other or with rigid closures or other rigid panels. Ventilators, as above, combined with additional means (as pumps, valves, baffles, etc.) to cause, control, or direct the flow of air are in Class 454, Ventilation. Closures and panel units in the form of grilles, shutters, or registers, whether of the stationary or noninterconnnected pivoted-vane type, have been treated as rigid panels.
165, Heat Exchange, 59, 234+, and 248+, for the combination of air distribution means with specific heat exchange means adapted to heat or cool the air and subclass 60 for the combination of an air
moistening device with a specific heat exchange means adapted to heat or cool a chamber.
210, Liquid Purification or Separation,
163+, for a grated fluid inlet.
217, Wooden Receptacles,
42, for ventilated crates and subclass 74 for ventilated barrels.
236, Automatic Temperature and Humidity Regulation, for automatically operating mechanisms for controlling temperature or humidity, per se. Class 236 does not include claims to the devices or systems controlled.
237, Heating Systems, appropriate subclasses and particularly
46+, for the combination of ventilating and heating wherein significant heating structure (i.e., more than a nominal recitation such as a broadly recited "heating means") is claimed.
239, Fluid Sprinkling, Spraying, and Diffusing,
34+, for slow diffusers, per se, and subclass 270 for a nozzle having an air supply means to the operator.
261, Gas and Liquid Contact Apparatus, appropriate subclasses for air moistening devices, per se, and 127+, for heating and cooling devices combined with moisteners for the air. Devices including significant ventilating structure and excluding specific heating or cooling structure will be found in Class 454.
280, Land Vehicles,
847+, for devices for protecting the occupants of a vehicle or the vehicle itself from dust and mud incident to the use of that vehicle.
296, Land Vehicles: Bodies and Tops,
84.1+, for vehicle windshields.
399, Electrophotography,
92+, for internal machine environment having a forced air circulation and subclasses 246+ for sprayed liquid developer applications.
404, Road Structure, Process, or Apparatus,
25+, for a pavement with a load bearing vault cover-closure
which may include openings or vents.
415, Rotary Kinetic Fluid Motors or Pumps, for a blower, per se.
416, Fluid Reaction Surfaces (i.e., Impellers), for a fan, per se. 417, Pumps, for a motor driven blower, per se.