Cooperative Patent Classification

CPC Definition - Subclass B60T

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Last Updated Version: 2016.11
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 place 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.
Relationships with other classification places

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
Limiting references

This place 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

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 place, 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 - 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 words/expressions 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 {specially for vehicles}
Definition statement

This place covers:

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

References
Limiting references

This place 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:

Control of retarders

Combinations of different braking elements or brake types

Regenerative braking

Positive locking brakes

Portable devices for preventing unwanted movement of vehicles, e.g. chocks
Definition statement

This place covers:

Portable wheel chocks, wedges.

References
Limiting references

This place does not cover:

Chocks on vehicle carrying vehicles

Restricting vehicle movement at loading stations

Vehicle modifications to facilitate cooling of brakes
Definition statement

This place covers:

For example air flow guiding elements, air ducts.

References
Limiting references

This place does not cover:

Spoilers per se

Ventilated discs or drums of braking elements

Collecting brake dust

Brake-action initiating means
Definition statement

This place covers:

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

Automatic initiation of braking systems, also for trailers.

References
Limiting references

This place 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:

Hill-Holding

ACC

Trailer braking systems

Overrun brakes

Hand- or foot actuated brake-action initiating means in pneumatic braking systems

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 place 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

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

Using electrical or electronic regulation means to control braking {(detecting or indicating faulty operation B60T 8/885)}
Definition statement

This place 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
Application-oriented references

Examples of places where the subject matter of this place 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 ({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 place 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
Limiting references

This place 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 {(using electrical circuitry or regulation means B60T 8/17)}
Definition statement

This place 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
Limiting references

This place does not cover:

ESP

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 {(using electrical circuitry or regulation means B60T 8/17)}
Definition statement

This place 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.

References
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 ({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 place 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
Limiting references

This place 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:

Braking systems with Hill-Hold function

Braking systems with ACC

Braking systems in which the brake elements are used for drying or reducing vibrations

Systems combined with brake locking means

Systems specially adapted for a particular kind of vehicle

BBW

EBS

BA

Speed sensor arrangement

Filling and bleeding

Non-electrically controlled valves

Lay out of the braking system

Electric control of the valve itself

Electrically controlled valves

Electrically controlled valves incorporated in control units

Specially adapted master cylinders for ABS, ASR etc.

Pumps

Pump control

Fluid damping aspects

EHB

Speed sensing by means of wheel driven pumps

ABS using volume expansion units (debooster systems)

Pump-back type (closed) ABS

Booster aspects

Open ABS

Booster used for ABS

Air over hydraulic braking systems

Automatic braking systems for all kinds of functions not initiated by the driver or rider

ABS with controlled pressure increase and decrease rate

Mechanical ABS systems

Means for changing the friction coefficient

Systems with torque sensing

Fly wheel type ABS

Response to failure

Diagnosing

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 place covers:

Hydrostatically and hydrodynamically controlled retarders.

References
Limiting references

This place 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 or drive is irrelevant (the power assistance or drive being essential B60T 13/00)
Definition statement

This place covers:

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

References
Limiting references

This place 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:

Trailer braking systems

Proportioning valves

Producing different pressures in different brake circuits

Master cylinders especially adapted for ABS

Overrun brakes

Master Cylinders for single track vehicles

Master Cylinders for clutches

Valves in general

Pipes or hoses per se

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 place covers:

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

References
Limiting references

This place 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:

Electric parking brake systems

Electrical control of boosters for ABS, ASR, BA etc.

Electric regenerative or resistance braking 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 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 place covers:

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

References
Informative references

Attention is drawn to the following places, which may be of interest for search:

Valves for ABS, ASR, ESP etc.

Bleed valves

Valves per se

Component parts, details, or accessories of power brake systems not covered by groups B60T 8/00, B60T 13/00 or B60T 15/00, or presenting other characteristic features (air compressors per se F04)
Definition statement

This place 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
Limiting references

This place 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:

Bleeding of ABS, ASR, ESP etc.

Arrangement of components in ABS/ASR units

Mounting of ABS/ASR units in or onto the vehicle

Failure responsive means or control in ABS or the like

Master Cylinder Reservoirs

Glad-Hands

Brake cylinders

B60T 17/08, F16D65/14B10

Braking system with monotoring of pressure differences between two circuits

Details of desiccator beds

Gas drying by absorption

Train braking systems

Braking systems for single track vehicles

Special rules of classification

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 place, the following terms or expressions are used with the meaning indicated:

Monitoring

in use

Checking

stationary; in factory or workshop