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VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
Definition statement
This subclass/group covers:

Arrangement of braking elements on vehicles (as defined in the Glossary of terms below).

Portable devices for preventing unwanted movement of vehicles, and especially where the devices are specially adapted to engage an exterior portion of a stationary vehicle to prevent or restrain its movement, e.g. chocks.

Vehicle modifications to facilitate cooling of brakes.

Control systems or parts thereof, in general or specially adapted for vehicles, for processing variables which influence the extent or duration of a braking event, for the following purposes:

• For adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force.

• For continuous braking making use of fluid or powdered medium, e.g. when descending a long slope.

• For transmitting braking action from initiating means to ultimate brake actuator.

Component parts, details or accessories of brake control systems, for example:

• Brake-action initiating means, e.g. manually or automatically-operated.

• Construction, arrangement or operation of valves incorporated in power brake systems.

• Component parts, details or accessories presenting other characteristic features, e.g. arrangements of pumps or compressors, brake cylinders other than ultimate actuators, safety or monitoring devices.

Relationship between large subject matter areas

B61H covers brakes or other retarding apparatus peculiar to rail vehicles, and arrangement or disposition of brakes or other retarding apparatus in rail vehicles, but the following aspects thereof in relation to rail vehicles are covered in B60T:

• Arrangements in rail vehicles for adjusting wheel-braking force to meet varying vehicular or permanent way conditions see B60T 8/00.

• Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive, brake systems incorporating such transmitting means, e.g. air-pressure brake systems see B60T 13/00.

• Construction, arrangement or operation of valves incorporated in power brake systems see B60T 15/00. (B60T 15/00).

• Component parts, details or accessories of brake systems.

References relevant to classification in this subclass
This subclass/group does not cover:
Electrodynamic brake systems and control thereof for vehicles, and in general
Conjoint control of brakes and other drive units of vehicles, such as engine, gearing or clutch (this may be particularly significant when traction control systems operating on more than just brakes are being classified)
Brakes or other retarding apparatus peculiar to rail vehicles; Arrangement or disposition of brakes or other retarding apparatus in rail vehicles (see above)
Arrangement of braking elements on cycles
Arrangement of braking elements on aircraft
Weighing of vehicles
Weighing in vehicles
Testing of braking systems or brakes
Dynamo-electric brakes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Railway stops, track brakes or retarding apparatus, fixed to permanent way
Braking devices for cranes, lift hoists, etc.
Braking devices for fork lift trucks
Safety arrangements on roads for slowing, redirecting or stopping errant vehicles, e.g. guard posts, bollards
Pumps
Hydraulic systems
Brakes themselves, i.e. the devices where the braking effect actually occurs, and actuators directly acting on those devices
Valves
Foot actuated controlling members
Traffic control systems for road vehicles
Special rules of classification within this subclass

In group B60T 8/00, when the subject matter to be classified is characterised by both electronic and non-electronic aspects, multiple classification should be applied, i.e. it should be classified both in group B60T 8/17 or its subgroups, and in groups B60T 8/18, B60T 8/24, B60T 8/26 or B60T 8/32 or their subgroups.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Boosters
Means for providing power assistance to the braking effort
Vehicle
This term can have two different meanings here, viz. (1) all vehicles except those restricted to one of the following types of vehicles: rail vehicles, waterborne vessels, aircraft, space vehicles, hand carts, cycles, animal-drawn vehicles, and sledges, which are covered by the relevant subclasses of B61 to B64. The term “vehicle” also includes (i) vehicular characteristics which are common to more than one of the above-listed types, and (ii) certain characteristics restricted to automobiles, road or cross-country trailers.(2) In some instances in this definition, the term “vehicle” has been qualified by another word which takes its meaning outside the scope of (1) above (e.g. “rail vehicle”), in which case the word “vehicle” takes its normal dictionary meaning. The reader can determine from the context whether an occurrence of the word “vehicle” in this definition falls within the meaning stated in (1) or (2).
Synonyms and Keywords

In patent documents the following abbreviations are often used:

EB
Electronic Brake Assist
BA
Braking Assistant
EBD, EBKV
Electronic Brake Force Distribution
TC, TCS
Traction control
FDR, FSR, ESP
Electronic Stability Control
EHB
Electro-Hydraulic Braking System
EBS
Electronic Braking Systems
BBW
Brake by wire
ACC
Automatic cruise control

In patent documents the following expressions/words are often used as synonyms:

• "Wheel slip", "wheel-slip", "wheel spin" and "wheel-spin"

• "Traction control" and "ASR (Anti-Spin Regulation) – for combating wheel-spin"

• "Automatic cruise control" and "automatic distance control"

• "Interlocking brake control", "integral braking" and "CBC (for motor cycles)"

Arrangements of braking elements, i.e. of those parts where braking effect occurs [N: specially for vehicles]
Definition statement
This subclass/group covers:

Arrangements of braking elements; braking by positive locking, retarding wheels or otherwise.

References relevant to classification in this group
This subclass/group does not cover:
Railway vehicle braking elements
Air resistance braking of aircraft
Exhaust brakes
Braking elements per se
Positive locking in transmissions
Informative references
Attention is drawn to the following places, which may be of interest for search:
Regenerative braking
Control of retarders
Combinations of different braking elements or brake types
Positive locking brakes
Portable devices for preventing unwanted movement of vehicles, e.g. chocks
Definition statement
This subclass/group covers:

Portable wheel chocks, wedges.

References relevant to classification in this group
This subclass/group does not cover:
Chocks on vehicle carrying vehicles
Restricting vehicle movement at loading stations
Vehicle modifications to facilitate cooling of brakes
Definition statement
This subclass/group covers:

For example air flow guiding elements, air ducts.

References relevant to classification in this group
This subclass/group does not cover:
Spoilers per se
Ventilated discs or drums of braking elements
Collecting brake dust
Brake-action initiating means
Definition statement
This subclass/group covers:

Brake-action initiating means, hand- and foot actuated brake initiating means;

Automatic initiation of braking systems, also for trailers.

References relevant to classification in this group
This subclass/group does not cover:
Accelerator pedals etc.
Traffic control systems
Informative references
Attention is drawn to the following places, which may be of interest for search:
Trailer braking systems
Overrun brakes
Hand- or foot actuated brake-action initiating means in pneumatic braking systems
Hill-Holding
ACC
Hand- or foot actuated controlling members in general
Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force (by changing number of effective brake cylinders in power brake systems B60T 17/10)
Definition statement
This subclass/group covers:
  • Load dependent braking systems and parts thereof
  • Braking systems that produce differential braking pressures on either side of the vehicle or between front and rear wheels of the vehicle and parts thereof,
  • Speed responsive braking systems (like ABS, ASR, ESP, BA) and parts thereof, and
  • Systems using electrical or electronic regulation means to control the braking.
Special rules of classification within this group

Reference is made to the special rules of classification as defined under B60T

Using electrical or electronic regulation means to control braking [N: (detecting or indicating faulty operation B60T 8/885)
Definition statement
This subclass/group covers:

Electric or electronic regulation means to control:

  • Load dependent braking systems,
  • Braking systems that produce differential braking pressures on either side of the vehicle or between front and rear wheels of the vehicle
  • Speed responsive braking systems (like ABS, ASR, ESP, BA).
References relevant to classification in this group
This subclass/group does not cover:

Examples of places where the subject matter of this group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Conjoint control
Informative references
Attention is drawn to the following places, which may be of interest for search:
ABS vehicle reference speed
Friction condition (road/tire)
responsive to vehicle weight or load, e.g. load distribution ([N: using electrical circuitry on regulation means B60T 8/17;] B60T 8/30 takes precedence; responsive to weight and speed condition B60T 8/58 )
Definition statement
This subclass/group covers:

Braking systems and parts thereof responsive to vehicle weight or load, especially for vehicle having more than two axles or braking systems wherein producing a differential braking between front and rear or left and right wheels is irrelevant.

References relevant to classification in this group
This subclass/group does not cover:
Load dependent braking in speed responsive braking systems or systems producing differential braking forces between the two axles of the vehicle
responsive to vehicle inclination or change of direction, e.g. negotiating bends [N: (using electrical circuitry or regulation means B60T 8/17 )]
Definition statement
This subclass/group covers:

Braking systems or parts thereof producing differential brake forces (left/right) according to roll of vehicle or wile negotiating bends or to avoid trailer sway and braking systems and parts thereof producing differential brake forces (left/right and/or front/rear) when the vehicle is on a slope.

References relevant to classification in this subgroup
This subclass/group does not cover:
Informative references
Attention is drawn to the following places, which may be of interest for search:
Trailer braking systems
characterised by producing differential braking between front and rear wheels [N: (using electrical circuitry or regulation means B60T 8/17 )]
Definition statement
This subclass/group covers:

Braking systems and parts thereof for producing differential braking forces between the front and rear wheel(s) (or axles) of the vehicle.

Pressure, deceleration and load responsive systems and parts thereof.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Motor cycle braking systems
responsive to a speed condition, e.g. acceleration or deceleration ([N: using electrical circuitry or regulation means B60T 8/17]; B60T 8/28 takes precedence; electric devices on electrically propelled vehicles indicating the wheel slip B60L 3/10; measuring linear or angular speed per se G01P 3/00)
Definition Statement
This subclass/group covers:

Subject matter wherein the braking action is adjusted or controlled in accordance with a signal relating to velocity. A speed condition can be, for example, a velocity signal from one or more plural wheels, or a velocity signal from a moving object or a vehicle body.

References relevant to classification in this subgroup
This subclass/group does not cover:
Systems for increasing wheel adhesion
Special tyre constructions for improving adhesion
Pressure sensors for ABS, ASR etc.
Speed sensors for ABS, ASR etc.
Informative references
Attention is drawn to the following places, which may be of interest for search:
Non-electrically controlled valves
Electrically controlled valves
Electric control of the valve itself
Electrically controlled valves incorporated in control units
Pumps
Pump control
EBS
EHB
BBW
BA
Specially adapted master cylinders for ABS, ASR etc.
Pump-back type (closed) ABS
Open ABS
ABS with controlled pressure increase and decrease rate
Fluid damping aspects
Booster aspects
Booster used for ABS
ABS using volume expansion units (debooster systems)
Automatic braking systems for all kinds of functions not initiated by the driver or rider
Fly wheel type ABS
Mechanical ABS systems
Lay out of the braking system
Speed sensor arrangement
Systems with torque sensing
Speed sensing by means of wheel driven pumps
Means for changing the friction coefficient
Systems specially adapted for a particular kind of vehicle
Air over hydraulic braking systems
Response to failure
Diagnosing
Braking systems with Hill-Hold function
Braking systems with ACC
Braking systems in which the brake elements are used for drying or reducing vibrations
Filling and bleeding
Systems combined with brake locking means
Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
Definition statement
This subclass/group covers:

Hydrostatically and hydrodynamically controlled retarders.

References relevant to classification in this group
This subclass/group does not cover:
Electric retarders, regenerative baking systems
Liquid-resistance brakes
Informative references
Attention is drawn to the following places, which may be of interest for search:
Regenerative non-electric brakes
Combination of friction brakes and electric retarders
Energy recovery in soil-shifting machines
Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance is irrelevant (the power assistance of drive being essential B60T 13/00)
Definition statement
This subclass/group covers:

Mechanical, e.g. by means of cables, and fluid transmission of braking force to the braking elements. Master cylinders; Reservoirs; Valves.

References relevant to classification in this group
This subclass/group does not cover:
Slip, spin or stability control (ABS, ASR, ESP etc.)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Master Cylinders for clutches
Master cylinders especially adapted for ABS
Master Cylinders for single track vehicles
Valves in general
Proportioning valves
Pipes or hoses per se
Overrun brakes
Trailer braking systems
Producing different pressures in different brake circuits
Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air pressure brake systems (arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions B60T 8/00; valves incorporated in such systems B60T 15/00)
Definition statement
This subclass/group covers:

Mechanically, electrically and/or fluidly assisted transmission or generation of braking force to the braking elements. Brake boosters.

References relevant to classification in this group
This subclass/group does not cover:
Slip, spin or stability control (ABS, ASR, ESP etc.)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Electrical control of boosters for ABS, ASR, BA etc.
Electric regenerative or resistance braking systems
Electric parking brake systems
Rope, cable, or chain winding mechanisms
Electric-mechanical braking elements per se
Construction, arrangement, or operation of valves incorporated in power brake systems and not covered by the groups B60T 11/00 or B60T 13/00 (valve structures responsive to a speed condition B60T 8/34, valves in general F16K)
Definition statement
This subclass/group covers:

Application and release valves, driver's valves, relay valves and arrangement or operation thereof

Informative references
Attention is drawn to the following places, which may be of interest for search:
Bleed valves
Valves for ABS, ASR, ESP etc.
Valves per se
Component parts, details, or accessories of brake systems not covered by the groups B60T 8/00, B60T 13/00 or B60T 15/00, or presenting other characteristic features
Definition statement
This subclass/group covers:

Air treatment devices;

Arrangements of pumps, compressors, piping and reservoirs;

Braking elements not directly acting on the friction material carry parts;

Safety devices;

Filling and bleeding; tools therefor.

References relevant to classification in this group
This subclass/group does not cover:
Pumps, compressors per se
High pressure reservoirs
Informative references
Attention is drawn to the following places, which may be of interest for search:
Train braking systems
Braking systems for single track vehicles
Arrangement of components in ABS/ASR units
Mounting of ABS/ASR units in or onto the vehicle
Glad-Hands
Gas drying by absorption
Details of desiccator beds
Master Cylinder Reservoirs
Brake cylinders
B60T 17/08
F16D65/14B10
Braking system with monotoring of pressure differences between two circuits
Failure responsive means or control in ABS or the like
Bleeding of ABS, ASR, ESP etc.
Special rules of classification within this group

Documents should be classified in B60T 8/00, B60T 13/00 or B60T 15/00 first; if there are further aspects in the documents to be classified, for which there is no classification possibility available in the above groups, further classification is done in B60T 17/00.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Monitoring
in use
Checking
stationary; in factory or workshop
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Last Modified: 10/11/2013