| ReturnTo Theme-Group-Choice | Onelevelup |
| 3G004 | EXHAUST SILENCERS | |
| F01N1/00 -1/24@Z;5/00-5/04@Z;13/00-99/00 | ||
| F01N1/00-1/24@Z;13/00-13/20@Z | AA | AA00 APPLICATIONS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | AA09 | AA10 |
| . For automobile engines | . . For motorcycles | . . For vehicles performing specific tasks | . . . For agricultural vehicles | . For marine engines (including outboard engines) | . For stationary engines | . For portable engines | . For V-engines | . For turbo-engines | . For high-pressure gases | |||
| BA | BA00 PURPOSE AND EFFECTS |
BA01 | BA02 | BA03 | BA04 | BA05 | BA06 | BA07 | BA08 | BA09 | ||
| . Noise control capability | . . Secondary noise reduction | . Engine performance | . Vibration reduction | . Reduction of thermal stress | . Purification of exhaust gas | . Corrosion resistance | . Improvement of appearance | . Adaptability | ||||
| CA | CA00 METHOD OF NOISE REDUCTION |
CA01 | CA02 | CA03 | CA04 | CA05 | CA06 | CA07 | ||||
| . Resonance (drawings) | . . For low frequencies (drawings) | . . . Branch types (drawings) | . Expansion and contraction (drawings) | . . Diffusion with perforations | . . . Perforated inner pipes | . . . Perforated partitions (drawing) | ||||||
| CA11 | CA12 | CA13 | CA14 | CA15 | ||||||||
| . Expansion and resonance (inserted pipe type) (drawings) | . Interference (drawings) | . Sound absorption | . . Filter types (drawing) | . Use of liquids | ||||||||
| DA | DA00 CHARACTERISTIC COMPOSITION |
DA01 | DA02 | DA03 | DA04 | DA05 | DA06 | DA07 | DA08 | DA09 | ||
| . Exhaust passages | . . Preliminary collection type (drawings) | . . Dual flow (drawings) | . . Diffusers | . . Auxiliary exhaust outlets | . Silencers proper | . . Casings (excluding outer surface) | . . Partition plates | . . Inner pipes | ||||
| DA11 | DA12 | DA13 | DA14 | DA15 | ||||||||
| . Linked portions and supports | . . Linkage to engines | . . Linkage to chassis | . Multiple construction | . Coatings | ||||||||
| DA21 | DA22 | DA23 | DA24 | DA25 | ||||||||
| . Accessories | . . Air guides | . . Liquid treatments (including drainage of rainwater) | . . Valves (including opening/closing valve plates) | . . Detectors | ||||||||
| EA | EA00 CHARACTERISTIC FUNCTIONS |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | |||||
| . Variable functions | . . Variable with exhaust air pressure | . . Resiliency (including flexibility) | . Disassembly (including detachability) | . Thermal insulation of exhaust | . Cooling of devices or exhaust | |||||||
| FA | FA00 MATERIALS |
FA01 | FA02 | FA03 | FA04 | FA05 | FA06 | FA07 | FA08 | FA09 | ||
| . Fibers | . Porosity | . . Foamed materials | . Metals | . . Sintered metals | . . Light alloys | . Inorganic materials | . Resins | . Composite materials | ||||
| GA | GA00 MANUFACTURING METHODS |
GA01 | GA02 | GA03 | GA04 | GA05 | GA06 | GA07 | GA08 | |||
| . Insertion and assembly | . Joining | . Casting | . Press working | . Rolling | . Welding (including soldering). | . Surface treatments | . . Painting |