| ReturnTo Theme-Group-Choice | Onelevelup |
| 3H082 | Fluid-pressure systems (2) | |
| F15B20/00 -21/12 | ||
| F15B20/00-21/12 | AA | AA00 PURPOSE AND EFFECTS OF IMPROVEMENTS |
AA01 | AA02 | AA03 | AA05 | AA06 | AA07 | AA08 | AA09 | ||
| . Emergency situations and emergency measures | . . Measures for decreasing the pressure of the actuating fluid | . . Measures to prevent uncontrolled operation of the actuating devices | . Compensation for changes in viscosity | . . Cooling | . . Heating | . . . Warming | . . Fixed-temperature control | |||||
| AA11 | AA12 | AA13 | AA15 | AA16 | AA17 | AA18 | AA19 | AA20 | ||||
| . Measures to prevent the intrusion of foreign matter | . . Measures to prevent trash or waste | . . Extraction of air or gases | . Compensation for deterioration of the actuating oil | . Delayed operation | . Generation of vibrations or pulses | . Improvement of reliability or durability | . Improvements related to processing and assembly | . Improvement of operation or work qualities | ||||
| AA21 | AA22 | AA23 | AA24 | AA25 | AA30 | |||||||
| . Improvement of maintenance and inspection | . Improvement of response characteristics | . Improvement of accuracy | . Reduction of vibration, noise, or shock | . Size and weight reduction, and simplification | . Others | |||||||
| BB | BB00 PRIMARY FLUID-PRESSURE SYSTEMS |
BB01 | BB02 | BB03 | BB04 | BB05 | BB06 | BB08 | BB09 | BB10 | ||
| . Power-control systems | . . Pressure-adjustment systems or relief valves | . . Pressure-reduction systems | . . Balancing systems | . . Pressure-increasing systems | . . Pressure-accumulation systems | . Speed-control systems | . . Differential systems | . . Systems for maintaining a fixed speed | ||||
| BB11 | BB12 | BB14 | BB15 | BB17 | ||||||||
| . Position-control systems | . . Locking systems | . Directional-control systems | . . Automatic-reciprocation systems | . Systems for operating a pilot valve | ||||||||
| BB21 | BB22 | BB23 | BB24 | BB25 | BB26 | BB27 | BB29 | BB30 | ||||
| . Systems for multiple actuators | . . Merging systems | . . Fluid-branching systems | . . Sequencing systems | . . Synchronizing systems | . Systems using variable pumps | . . Closing systems | . Systems with a feedback means | . Others | ||||
| CC | CC00 DRIVE MEANS FOR FLUID-PRESSURE SYSTEMS |
CC01 | CC02 | CC03 | CC04 | CC05 | CC06 | CC07 | ||||
| . Fluids for driving | . . Oil | . . Air or gases | . . . Air or gases under negative pressure | . . Specific fluids | . . . Non-combusting oil | . . . Magnetic fluids | ||||||
| CC11 | CC13 | CC14 | CC15 | CC16 | CC17 | CC18 | CC20 | |||||
| . Gunpowder | . Return or backup means | . . Electric or magnetic return or backup means | . . Manual return or backup means | . . Mechanical return or backup means (e.g., springs) | . . Return or backup by means of fluids separate from main body | . . External loads | . Others | |||||
| DA | DA00 SAFETY AND EMERGENCY DEVICES |
DA01 | DA02 | DA03 | DA04 | DA06 | DA07 | DA08 | DA09 | DA10 | ||
| . Emergency situations | . . Dangerous operating conditions | . . . High temperatures | . . . Excessive loads or high pressure | . . Device failure | . . . Damage to the conduits | . . . Failure of control circuits such as electric circuits | . . . Clogging by refuse matter | . . . Weakening of seals | ||||
| DA11 | DA12 | DA13 | DA14 | DA16 | DA17 | DA18 | DA19 | DA20 | ||||
| . . . Accidental actuation | . . . Leakage due to causes other than those mentioned above | . . Power failure | . . Improper operation | . Detection means | . . Temperature detection | . . Pressure detection | . . Position detection | . . Flow-volume detection | ||||
| DA21 | DA22 | DA23 | DA24 | |||||||||
| . Control modes | . . Maintenance of actuator operation | . . Actuator stoppage | . . Escape to a safe position or return to a neutral position | |||||||||
| DA31 | DA32 | DA33 | DA34 | DA35 | DA36 | DA37 | DA38 | DA39 | DA40 | |||
| . Control means | . . Installation of backup or redundant systems | . . . Backup power sources | . . . . Control devices with a characteristic driving means for the power source | . . . Main systems with parallel arrangements | . . . Control systems with parallel arrangements | . . Circuit cutoffs | . . Short circuits | . . Pump stoppage | . . Pressure release | |||
| DA41 | DA42 | DA43 | DA45 | DA46 | DA47 | DA48 | DA49 | |||||
| . . Alarms or indication | . . Comparison to standard values and means of calculation | . . Timer means and timer systems | . Targets of safety measures | . . Fluid systems | . . Accumulators | . . Control valves | . . . Servo valves | |||||
| DB | DB00 SPECIFIC MEANS RELATING TO FLUID CHARACTERISTICS |
DB01 | DB02 | DB03 | DB04 | DB05 | DB06 | DB07 | DB08 | DB09 | DB10 | |
| . Specific means | . . Control means for temperature compensation | . . Heating and cooling means | . . . Heaters | . . . Resistance means | . . . . Throttles | . . . . Control valves | . . . Cooling apparatuses | . . . . Fans | . . . Heat pipes | |||
| DB11 | DB12 | DB13 | DB14 | DB16 | DB18 | DB20 | ||||||
| . . Measures to prevent and means to remove foreign matter | . . . Strainers | . . . . Multiple strainers | . . . . . Parallel strainers | . . . . Replaceable strainers | . . . Flushing | . . Replacement of actuating oil | ||||||
| DB21 | DB22 | DB23 | DB24 | DB26 | DB28 | |||||||
| . . Bypass systems | . . . Installation of a throttle | . . . Installation of a relief valve | . . . Installation of a check valve | . . Detection means | . . Alarms or indication | |||||||
| DB31 | DB32 | DB33 | DB34 | DB35 | DB36 | DB37 | DB38 | |||||
| . Location of installation and objects to be installed | . . Reservoirs for the actuation oil | . . Actuators | . . Pilot systems | . . Main flow channels | . . . Main flow channels at the intake end of the pump | . . . Main flow channels at the discharge end of the pump | . . . Return flow channels | |||||
| DC | DC00 DELAY MEANS |
DC01 | DC02 | DC04 | DC05 | DC06 | DC07 | DC08 | DC10 | |||
| . Throttles | . . Variable throttles | . Means with accumulators | . Means with fluid elements | . Means with nozzles or flappers | . Means with check valves | . Means with electric or magnetic control means | . Others | |||||
| DD | DD00 GENERATION OF PULSES |
DD01 | DD02 | DD03 | DD04 | DD05 | DD06 | DD07 | ||||
| . Pulse-generating means | . . Pulse generation by nozzles or flappers | . . Pulse generation by control valves | . . . Pulse generation by rotating control valves | . . Pulse generation by fluid elements | . . Pulse generation by throttles | . . Pulse generation by pumps | ||||||
| DD11 | DD12 | DD13 | DD14 | DD15 | ||||||||
| . Control means | . . Electric- or magnetic-control arrangements | . . Fluid-control arrangements | . . . Fluid-control arrangements with throttles | . . . Fluid-control arrangements with accumulators | ||||||||
| DE | DE00 OTHER GENERAL FEATURES OF FLUID-PRESSURE SYSTEMS |
DE01 | DE02 | DE03 | DE04 | DE05 | DE06 | DE07 | DE08 | DE09 | DE10 | |
| . Memory and calculation means | . . Mechanical means | . . Fluid means | . . Electric or magnetic means | . . . Computers | . Systems with characteristic piping structures | . . Jointed piping structures | . Measures to prevent oil leakage and oil collection | . Measures to prevent rusting and corrosion | . Others | |||
| EE | EE00 USES OF FLUID-PRESSURE SYSTEMS |
EE01 | EE02 | EE03 | EE04 | EE05 | EE06 | EE07 | EE08 | EE09 | EE10 | |
| . Civil engineering and construction machines | . . Power shovels | . Hard-pressure machines (e.g., presses) | . Die-casting machines | . Injection-molding machines | . Manipulators (i.e., robots) | . Cargo-handling machines | . . Cranes | . . Forklifts | . . Elevators | |||
| EE11 | EE12 | EE13 | EE14 | EE15 | EE16 | EE17 | EE20 | |||||
| . Airplanes | . Vehicles | . . Clutches | . . Brakes | . . Power steering | . Ships | . Agricultural machines | . Others |