| | CLASS NOTES |
| 4 | DF | REGENERATOR {4} |
| 11.1 | DF | WITH ALARM, INDICATOR, SIGNAL, REGISTER, RECORDER, TEST OR INSPECTION MEANS {1} |
| 200 | DF | WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14} |
| 41 | DF | WITH VEHICLE FEATURE {2} |
| 45 | DF | GEOGRAPHICAL |
| 46 | DF | FLEXIBLE ENVELOPE OR COVER TYPE |
| 47 | DF | STRUCTURAL INSTALLATION {3} |
| 58 | DF | HEATING AND COOLING {3} |
| 67 | DF | WITH EXTERNAL SUPPORT {1} |
| 69 | DF | RESILIENT VIBRATION DAMPER ISOLATING EXCHANGER ELEMENT |
| 70 | DF | WITH LEAKAGE COLLECTOR |
| 71 | DF | WITH PURGE, OR DRAINAGE, COCK OR PLUG |
| 72 | DF | COVERED ACCESS OPENING {2} |
| 76 | DF | WITH REPAIR OR ASSEMBLY MEANS {3} |
| 80.1 | DF | WITH RETAINER FOR REMOVABLE ARTICLE {2} |
| 81 | DF | EXPANSION AND CONTRACTION RELIEVING OR ABSORBING MEANS {1} |
| 84 | DF | WITH MEANS FLEXING, JARRING OR VIBRATING HEAT EXCHANGE SURFACE |
| 85 | DF | AGITATOR OR IMPELLER MOTOR OPERATED BY EXCHANGE FLUID |
| 86 | DF | MOVABLE HEATING OR COOLING SURFACE {4} |
| 94 | DF | WITH SCRAPER REMOVING PRODUCT FROM TEMPERATURE MODIFYING SURFACE |
| 95 | DF | WITH CLEANING MEANS FOR HEAT EXCHANGER |
| 96 | DF | WITH ADJUSTOR FOR HEAT, OR EXCHANGE MATERIAL, FLOW {3} |
| 104.11 | DF | INTERMEDIATE FLUENT HEAT EXCHANGE MATERIAL RECEIVING AND DISCHARGING HEAT {5} |
| 108 | DF | RECIRCULATION |
| 109.1 | DF | WITH AGITATING OR STIRRING STRUCTURE |
| 110 | DF | WITH FIRST FLUID HOLDER OR COLLECTOR OPEN TO SECOND FLUID {2} |
| 119 | DF | WITH SOLIDS SEPARATOR FOR EXCHANGE FLUID |
| 120 | DF | WITH IMPELLER OR CONVEYOR MOVING EXCHANGE MATERIAL {1} |
| 128 | DF | THERMOSYPHONIC FLUE TYPE {3} |
| 132 | DF | HEATING OR COOLING MEANS IN OPEN COMMUNICATION WITH RESERVOIR |
| 133 | DF | WITH COATED, ROUGHENED OR POLISHED SURFACE |
| 134.1 | DF | WITH PROTECTOR OR PROTECTIVE AGENT |
| 135 | DF | WITH THERMAL OR ACOUSTICAL BLOCKER {1} |
| 137 | DF | CONVERTIBLE |
| 138 | DF | COMBINED |
| 139 | DF | INTERNALLY BRANCHED FLOW, EXTERNALLY PORTED |
| 140 | DF | THREE NON-COMMUNICATING FLUIDS {1} |
| 142 | DF | SPUR TUBE PROJECTS INTO ENCLOSURE |
| 143 | DF | PLURAL CASTING-CONDUIT UNITS<< LINE OR COMMON HEADER CONNECTED |
| 144 | DF | LINE CONNECTED CONDUIT ASSEMBLIES {1} |
| 146 | DF | GRADATED HEAT TRANSFER STRUCTURE {1} |
| 148 | DF | RADIATOR CORE TYPE {4} |
| 154 | DF | NON-COMMUNICATING COAXIAL ENCLOSURES {2} |
| 157 | DF | CASING OR TANK ENCLOSED CONDUIT ASSEMBLY {4} |
| 164 | DF | FLOW PASSAGES FOR TWO CONFINED FLUIDS {1} |
| 168 | DF | CONDUIT WITHIN, OR CONFORMING TO, PANEL OR WALL STRUCTURE {3} |
| 172 | DF | SIDE-BY-SIDE TUBULAR STRUCTURES OR TUBE SECTIONS {1} |
| 177 | DF | TUBULAR STRUCTURE {4} |
| 185 | DF | HEAT TRANSMITTER |
| 186 | DF | MISCELLANEOUS |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 900 | DF | COOLING TOWERS |
| 901 | DF | HEAT SAVERS |
| 902 | DF | HEAT STORAGE |
| 903 | DF | CONVECTION |
| 904 | DF | RADIATION |
| 905 | DF | MATERIALS OF MANUFACTURE |
| 906 | DF | REINFORCEMENT |
| 907 | DF | POROUS |
| 908 | DF | FLUID JETS |
| 909 | DF | REGENERATION |
| 910 | DF | TUBE PATTERN |
| 911 | DF | VAPORIZATION |
| 912 | DF | COMBINED OR CONVERTIBLE HEAT EXCHANGE MODES |
| 913 | DF | CONDENSATION |
| 914 | DF | FILMING |
| 915 | DF | FOAMING |
| 916 | DF | OIL COOLER |
| 917 | DF | PRESSURIZATION AND/OR DEGASSIFICATION |
| 918 | DF | HEATED AND COOLED FOOD CABINETS AND/OR TRAYS {1} |
| 920 | DF | PARTICULATE HEAT EXCHANGE |
| 921 | DF | DEW POINT |
| DIG 1 | DF | WITH ALARM, INDICATOR, RECORDER, TEST, OR INSPECTION MEANS {7} |
| DIG 9 | DF | HAVING A SOLID HEAT STORAGE MASS FOR ABSORBING HEAT FROM ONE FLUID AND RELEASING IT TO ANOTHER (I.E. REGENERATOR) {5} |
| DIG 44 | DF | HAVING FLEXIBLE HEAT EXCHANGE SURFACE CONFORMING TO A SOLID STRUCTURE (E.G., APPLICATOR, ETC.) {3} |
| DIG 51 | DF | HAVING EXPANSION AND CONTRACTION RELIEVING OR ABSORBING MEANS {2} |
| DIG 72 | DF | AGITATOR OR IMPELLER MOTOR OPERATED BY FIRST HEAT EXCHANGE FLUID {1} |
| DIG 76 | DF | WITH SCRAPER FOR REMOVING PRODUCT FROM HEAT TRANSFER SURFACE {4} |
| DIG 92 | DF | WITH VALVE OR MOVABLE DEFLECTOR FOR HEAT EXCHANGE FLUID FLOW {6} |
| DIG 132 | DF | WITH ADJUSTOR FOR HEAT FLOW {1} |
| DIG 135 | DF | MOVABLE HEAT EXCHANGER {4} |
| DIG 162 | DF | ONLY DIRECT-CONTACT HEAT EXCHANGE BETWEEN TWO SEPARATELY SUPPLIED FLUIDS |
| DIG 163 | DF | INCLUDING A MEANS TO FORM FLUID FILM ON HEAT TRANSFER SURFACE (E.G., TRICKLE) {8} |
| DIG 182 | DF | INDIRECT-CONTACT COOLING TOWER |
| DIG 183 | DF | INDIRECT-CONTACT EVAPORATOR |
| DIG 184 | DF | INDIRECT-CONTACT CONDENSER {12} |
| DIG 224 | DF | INCLUDING A MEANS TO FORM A FLUID JET |
| DIG 225 | DF | WITH SOLID CONVEYOR {2} |
| DIG 228 | DF | WITH FAN OR PUMP {3} |
| DIG 318 | DF | WITH DRIVEN AGITATOR {2} |
| DIG 327 | DF | THERMOSYPHONIC HAVING VERTICAL AIR DRAFT PASSAGE {3} |
| DIG 342 | DF | TANK WITH HEAT EXCHANGER {5} |
| DIG 355 | DF | HAVING SEPARATE FLOW PASSAGE FOR TWO DISTINCT FLUIDS {7} |
| DIG 454 | DF | HAVING SIDE-BY-SIDE CONDUITS STRUCTURE OR CONDUIT SECTION {16} |
| DIG 510 | DF | HAVING HEAT EXCHANGE SURFACE TREATMENT, ADJUNCT OR ENHANCEMENT {7} |
| DIG 532 | DF | HEAT EXCHANGE CONDUIT STRUCTURE {4} |
| DIG 539 | DF | HAVING A HEAT STORAGE MASS |
| FOR 100 | DF | PROCESS (165/1) {1} |
| FOR 103 | DF | TIME OR PROGRAM ACTUATOR (165/12) |
| FOR 104 | DF | AUTOMATIC CONTROL (165/13) {2} |
