(under the class definition) Apparatus having means to protect it from corrosion, wear, soil or contamination; or to prevent it from receiving or inflicting physical damage.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55, for a heat exchanger with a shield projecting from a wall.
69, for a vibration shield.
81+, for protection against damage due to expansion or contraction.
129, for a radiator within a convective casing.
133, for a heat exchanger with a protective coating.
200, for a condition responsive control. SEE OR SEARCH CLASS
122, Liquid Heaters and Vaporizers,
504+, for a closed liquid heater with a safety device.
123, Internal-Combustion Engines,
142.5, for the combination of an internal combustion engine and means supplying external energy to heat some part or adjunct of the engine such as a radiator.
137, Fluid Handling,
59+, for a freeze condition responsive safety system; subclasses 67+ for a destructible or deformable element control; and subclasses 343+ for a protector for a fluid handling system not specialized to heat exchange.
138, Pipes and Tubular Conduits,
27+, for a freeze protecting pressure compensator and subclasses 32+ for freezing and thawing protection of a tubular conduit not specialized to heat exchange.
204, Chemistry, Electrical and Wave Energy,
196.01+, for electrolytic object protection apparatus. 205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,
724+, for electrolytic protection of a metal or metal alloy object.
237, Heating Systems,
79, for a radiator shield and subclass 80 for a heating system with an antifreeze device.
310, Electrical Generator or Motor Structure 310, for apparatus specialized to the protection of an object by the application of a magnetic field.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,
7+, for a method of protecting metal from tarnish or corrosion.
432, Heating,
233, for a heating apparatus element having protective cooling structure.
