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 Class   303FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS
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  1           MISCELLANEOUS
  2           MULTIPLE SYSTEMS
  3           . (1 indent ) Fluid pressure and electric
  4           . (1 indent ) Fluid pressure and vacuum
  5           MULTIPLE FLUID-RECEIVING DEVICES
  6.01           . (1 indent ) Multiple motors
  6.1           .. (2 indent ) Brake and door
  7           .. (2 indent ) Sectional train
  8           ... (3 indent ) Multiple brake valves
  9           .. (2 indent ) Supplementary in emergency
  9.61           .. (2 indent ) Separate and simultaneous control
  9.62           .. (2 indent ) Apportioning control
  9.63           ... (3 indent ) Failure responsive
  9.64           ... (3 indent ) Motorcycle
  9.65           ... (3 indent ) Manual
  9.66           ... (3 indent ) For pneumatic system
  9.67           ... (3 indent ) Inertia
  9.68           .... (4 indent ) Inertia weight
  9.69           ... (3 indent ) Load
  9.71           ... (3 indent ) Having significant pressure control by front brake
  9.72           ... (3 indent ) Having multiple pistons affecting fluid flow
  9.73           ... (3 indent ) Having significant output feature
  9.74           .... (4 indent ) Multiple outlets
  9.75           ... (3 indent ) Detail
  9.76           .. (2 indent ) Spring operated motor
  10           WITH PUMP
  11           . (1 indent ) Pressure control
  12           . (1 indent ) Vacuum
  13           MULTIPLE CONTROL
  14           . (1 indent ) Double heading
  15           . (1 indent ) Fluid and electric
  16           .. (2 indent ) Automatic electric
  17           ... (3 indent ) Electric impulse
  18           EXTERIOR CONTROL
  19           . (1 indent ) Deadman type
  121           SPEED-CONTROLLED
  122           . (1 indent ) With failure responsive means
  122.01           .. (2 indent ) Traction failure
  122.02           .. (2 indent ) Antilock failure with warning
  122.03           .. (2 indent ) Failure related to brake condition (e.g., wear, sensor or switch operation) with indicator
  122.04           .. (2 indent ) Electric system failure (no warning)
  122.05           ... (3 indent ) Electronic or electric component (e.g., speed detector, failure sensing) with warning
  122.06           .. (2 indent ) ABS failure detected via time period of sensed wheel lock or wheel speed signal
  122.07           .. (2 indent ) Time signal error (no warning)
  122.08           .. (2 indent ) Active circuit testing
  122.09           .. (2 indent ) Pressure failure
  122.1           ... (3 indent ) With warning
  122.11           ... (3 indent ) Detected via stroke sensor
  122.12           ... (3 indent ) Pump failure detection
  122.13           ... (3 indent ) Auxiliary pressure failure
  122.14           .... (4 indent ) With warning
  122.15           ... (3 indent ) Pneumatic
  123           . (1 indent ) For a tractor-trailer type vehicle
  124           .. (2 indent ) Electric brake
  125           . (1 indent ) Automatic braking including speed governor or hydraulic retarder
  126           .. (2 indent ) Aircraft
  127           . (1 indent ) Pneumatic
  128           .. (2 indent ) For a railway vehicle (e.g., train)
  129           ... (3 indent ) With speed governor (hydraulic or inertia)
  130           .... (4 indent ) Compared to fixed reference
  131           ... (3 indent ) Plural similar inputs
  132           ... (3 indent ) Speed responsive and other conditions (e.g., acceleration, pressure, track hazard, friction)
  133           ... (3 indent ) Traction control
  134           ... (3 indent ) Compared to fixed reference
  135           ... (3 indent ) Automatic
  136           ... (3 indent ) Pseudo-speed
  137           . (1 indent ) Motorcycle
  138           . (1 indent ) Speed, deceleration, or ABS indication
  139           . (1 indent ) And traction control
  140           .. (2 indent ) With yaw control
  141           .. (2 indent ) With engine torque power take-off (PTO) control
  142           .. (2 indent ) Motor control
  143           .. (2 indent ) With four wheel drive or all wheel drive
  144           .. (2 indent ) Intersecting traction and skid occurrence
  145           .. (2 indent ) Odd condition (e.g., fuel supply cut-off, modulating valve)
  146           . (1 indent ) With yaw control
  147           .. (2 indent ) From speed sensors
  148           .. (2 indent ) From split coefficient of friction (mu)
  149           . (1 indent ) Split coefficient of friction (mu)
  150           . (1 indent ) Specific mu determination
  151           . (1 indent ) Traction-motor vehicle
  152           . (1 indent ) Regenerative brakes
  153           . (1 indent ) Lead signal control for antiskid
  154           . (1 indent ) Multiple control signal with multiple threshold
  155           . (1 indent ) Braking pressure demand or braking force desire
  156           . (1 indent ) Pulse frequency or time period controlling pressure rebuild
  157           . (1 indent ) Pressure release control
  158           . (1 indent ) Pressure reapply control
  159           . (1 indent ) Wheel pressure delay compared to reference
  160           . (1 indent ) Pressure or specific condition (e.g., deceleration) determines wheel speed instead of direct speed sensor
  161           . (1 indent ) Current or voltage ramp proportional to vehicle speed
  162           . (1 indent ) Current control of linear piston drive motor
  163           . (1 indent ) Slip ratio
  164           . (1 indent ) Slip time versus nonslip time
  165           . (1 indent ) Variable target slip values
  166           . (1 indent ) Wheel speed sensor and braking pressure sensor
  167           . (1 indent ) Brake force or pressure determined from speed sensors
  168           . (1 indent ) Wheel generated pulse signal control (speed sensor)
  169           . (1 indent ) Left or right speed comparison
  170           . (1 indent ) Select high wheel speed versus select low
  171           . (1 indent ) Wheel speed versus pseudo vehicle speed (e.g., from deceleration)
  172           .. (2 indent ) By direct feedback or instant wheel control
  173           .. (2 indent ) By comparison of plural wheel speeds
  174           . (1 indent ) Previously stored wheel speed information
  175           . (1 indent ) Incipient or imminent skid measured
  176           . (1 indent ) Antilock control disabled or altered for acceleration or speed ranges
  177           . (1 indent ) Sensing jerk, acceleration, or deceleration
  178           .. (2 indent ) Wheel deceleration to find velocity error
  179           .. (2 indent ) Rotary and linear inertia
  180           .. (2 indent ) Rotary inertia
  181           .. (2 indent ) Linear inertia or accelerometer (includes pendulum type)
  182           .. (2 indent ) Accelerometer versus wheel rotation sensor
  183           .. (2 indent ) Specific acceleration or deceleration determined electronically
  184           .. (2 indent ) Acceleration-deceleration versus timing
  185           .. (2 indent ) Sensing deceleration then acceleration
  186           . (1 indent ) Front-rear axle apportioning or speed difference
  187           . (1 indent ) Diagonal wheels apportioning arrangement
  188           . (1 indent ) All wheel apportioning arrangement (e.g., cross coupling)
  189           . (1 indent ) Independent control for each wheel
  190           . (1 indent ) Four-wheel drive or all wheel drive
  191           . (1 indent ) Odd condition or device detection (e.g., fluid or brake temperature, hill holder, anti-squeal controller, acoustic emission)
  192           .. (2 indent ) Vehicle inclination
  193           .. (2 indent ) With sonar or radar type sensor
  194           .. (2 indent ) Hop or bounce (from vibration or oscillation) signal
  195           .. (2 indent ) Spurious signal
  196           ... (3 indent ) For rough road
  197           .. (2 indent ) With feeler wheel
  198           .. (2 indent ) Speed and vehicle load condition (e.g., cargo)
  199           . (1 indent ) Electric control circuit detail
  112           . (1 indent ) Torque sensing
  113.1           . (1 indent ) Having a valve system responsive to a wheel lock signal
  113.2           .. (2 indent ) With traction control
  113.3           ... (3 indent ) Including booster
  113.4           .. (2 indent ) Including a stroke sensor
  113.5           .. (2 indent ) With system apportioning control
  114.1           .. (2 indent ) Including hydraulic power booster
  114.2           ... (3 indent ) Parallel boosters
  114.3           .. (2 indent ) Including pneumatic power booster
  115.1           .. (2 indent ) System controlled by expansible chamber type modulator
  115.2           ... (3 indent ) Having electric control
  115.3           ... (3 indent ) Having vacuum motor control
  115.4           ... (3 indent ) Having pump pressure control
  115.5           .... (4 indent ) Pump pressure operates fluid motor
  115.6           ... (3 indent ) Including flywheel control (e.g., motorcycle type)
  116.1           .. (2 indent ) Including pump with system solenoid valve
  116.2           ... (3 indent ) Having pressure line isolated from master cylinder line
  116.3           .. (2 indent ) Vehicle wheel operated pump
  116.4           .. (2 indent ) System pump structure detail
  117.1           .. (2 indent ) Spool valve
  118.1           .. (2 indent ) Pneumatic (relay or motorman) type
  119.1           .. (2 indent ) System controlled by solenoid valve
  119.2           ... (3 indent ) System solenoid valve detail
  119.3           ... (3 indent ) Housing for plural solenoids
  20           ELECTRIC CONTROL
  22.1           LOAD CONTROL
  22.2           . (1 indent ) Empty and load type
  22.3           .. (2 indent ) Alterable for different classes of service
  22.4           . (1 indent ) Failure responsive
  22.5           . (1 indent ) Responsive to fluid pressure spring
  22.6           . (1 indent ) Railway vehicle
  22.7           .. (2 indent ) Detail
  22.8           . (1 indent ) Detail
  24.1           INERTIA CONTROL
  25           AUTOMATIC AND DIRECT
  26           . (1 indent ) Supplementary control pipe
  27           . (1 indent ) Direct on control-pipe reduction
  28           AUTOMATIC
  29           . (1 indent ) Supplementary control pipe
  30           . (1 indent ) Supplementary reservoir pipe
  31           . (1 indent ) Vacuum
  32           . (1 indent ) Equilibrium
  33           . (1 indent ) Equalizing valves
  34           .. (2 indent ) Rotary type
  35           . (1 indent ) Synchronizing
  36           .. (2 indent ) Release
  37           .. (2 indent ) Quick action
  38           ... (3 indent ) Service
  39           ... (3 indent ) Control pipe to chamber
  40           . (1 indent ) Application valve
  41           . (1 indent ) Preliminary valve movement
  42           .. (2 indent ) Emergency preventers
  43           . (1 indent ) Slow-reduction emergency
  44           . (1 indent ) Secondary service operation
  45           . (1 indent ) Positive-movement equalizing valve
  46           . (1 indent ) Augmented feed to motor
  47           . (1 indent ) Train rear end first
  48           DIRECT
  49           . (1 indent ) Liquid link
  50           MOTORMAN'S VALVES
  51           . (1 indent ) Conductor type
  52           . (1 indent ) Multiple motors
  53           .. (2 indent ) Engine and train
  54           . (1 indent ) Equalizing
  55           .. (2 indent ) Preliminary discharge
  56           . (1 indent ) Details
             CHARGING
  57           . (1 indent ) Plurality of pressures
  58           . (1 indent ) Reuse
  59           . (1 indent ) Outlet-pressure control
  60           .. (2 indent ) Maintaining
  61           . (1 indent ) Intermittent
             . (1 indent ) Motor
  62           .. (2 indent ) Motor-movement control
  63           .. (2 indent ) Failure-system pressure
  64           . (1 indent ) Auxiliary reservoir
  65           .. (2 indent ) Motor remaining charged
  66           . (1 indent ) Control pipe
  67           .. (2 indent ) Preventers
             RELEASING
  68           . (1 indent ) Motor
  69           .. (2 indent ) Quick
  70           .. (2 indent ) Venting auxiliary reservoir
  71           .. (2 indent ) Fluid-pressure retracting
  72           .. (2 indent ) Delayed
  73           ... (3 indent ) Blow down
  74           ... (3 indent ) Graduated
  75           .. (2 indent ) Preventers
  76           ... (3 indent ) Motorman valve control
  77           ... (3 indent ) Control-pipe pressure
  78           ... (3 indent ) Auxiliary-reservoir control
  79           ... (3 indent ) Loaded valve
  80           . (1 indent ) Auxiliary reservoir
  81           . (1 indent ) Control pipe
  82           .. (2 indent ) By action of control-pipe pressure
  83           .. (2 indent ) To chamber
  84.1           FLOW RETARDER
  84.2           . (1 indent ) Isolation valve
  85           SUPPLEMENTARY RESERVOIR
  86           MISCELLANEOUS OPERATIONS ON CONTROL PIPE
  87           PULSATION NEUTRALIZERS
  89           LOCKS
  90           PIPELESS VALVES
 
 CROSS-REFERENCE ART COLLECTIONS
 
  900           ABS THROTTLE CONTROL
  901           ABS CHECK VALVE DETAIL
 
 FOREIGN ART COLLECTIONS
 
  FOR000           CLASS-RELATED FOREIGN DOCUMENTS
 
 DIGESTS
 
   DIG1           PRESSURE COMPARISON
   DIG2           BRAKE CONTROL BY PRESSURE COMPARISON
   DIG3           . (1 indent ) Electrical pressure sensor
   DIG4           .. (2 indent ) Pressure signal used in electrical speed controlled braking circuit
   DIG5           ACCELERATION PEAK DETECTION
   DIG6           AXLE DIFFERENTIAL CONTROL
   DIG7           SMALL TIRE DIGEST
   DIG8           ANTICHATTER
   DIG9           PLURAL PROCESSORS
   DIG10           VALVE BLOCK INTEGRATING PUMP, VALVES, SOLENOID, ACCUMULATOR, ETC.
   DIG11           ACCUMULATOR
   DIG12           AIR OVER HYDRAULIC BRAKE SYSTEM


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