TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
RELEASE BRAKES [12 records]
Record 1 - internal organization data 2024-02-07
Record 1, English
Record 1, Subject field(s)
- Braking Devices (Mechanical Components)
- Railroad Safety
- Rolling Stock (Railroads)
Record 1, Main entry term, English
- brake indicator device
1, record 1, English, brake%20indicator%20device
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
... "brake indicator device" means any device used to indicate the application and release of the brakes when the piston is not visible. 2, record 1, English, - brake%20indicator%20device
Record 1, French
Record 1, Domaine(s)
- Freins (Composants mécaniques)
- Sécurité (Transport par rail)
- Matériel roulant (Chemins de fer)
Record 1, Main entry term, French
- indicateur de freinage
1, record 1, French, indicateur%20de%20freinage
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
«indicateur de freinage» : tout dispositif servant à indiquer le serrage et le desserrage des freins lorsque le piston n'est pas visible [...] 1, record 1, French, - indicateur%20de%20freinage
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2023-08-04
Record 2, English
Record 2, Subject field(s)
- Braking Devices (Mechanical Components)
- Rolling Stock (Railroads)
Record 2, Main entry term, English
- brake cylinder
1, record 2, English, brake%20cylinder
correct
Record 2, Abbreviations, English
- BC 2, record 2, English, BC
correct
Record 2, Synonyms, English
- air brake cylinder 3, record 2, English, air%20brake%20cylinder
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
A cylinder located at the junction of the pneumatic and mechanical elements of the air brake system. 4, record 2, English, - brake%20cylinder
Record number: 2, Textual support number: 1 OBS
It contains a piston which is forced outward by compressed air when the brakes are applied and returned by a release spring when the brakes are released. 4, record 2, English, - brake%20cylinder
Record 2, French
Record 2, Domaine(s)
- Freins (Composants mécaniques)
- Matériel roulant (Chemins de fer)
Record 2, Main entry term, French
- cylindre de frein
1, record 2, French, cylindre%20de%20frein
correct, masculine noun
Record 2, Abbreviations, French
- CF 2, record 2, French, CF
correct, masculine noun
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Organe qui réalise la jonction entre les éléments pneumatiques et mécaniques du système de frein à air. 3, record 2, French, - cylindre%20de%20frein
Record number: 2, Textual support number: 1 OBS
Son alimentation en air comprimé, ou sa vidange, provoque le mouvement de la timonerie dans le sens du serrage ou du desserrage des freins. 3, record 2, French, - cylindre%20de%20frein
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Frenos (Componentes mecánicos)
- Equipo rodante (Ferrocarriles)
Record 2, Main entry term, Spanish
- cilindro de freno
1, record 2, Spanish, cilindro%20de%20freno
masculine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2018-09-14
Record 3, English
Record 3, Subject field(s)
- Rail Transport Operations
- Railroad Safety
Record 3, Main entry term, English
- bottling the air
1, record 3, English, bottling%20the%20air
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
While setting off the cars at Maxville, the conductor closed the angle cocks on the adjoining ends of the cars to be separated and did not vent the air, leaving the air brake line charged on the 74 cars left unattended on the main line. This practice is known in the industry as "bottling the air. "During a train service brake application, the head-end air brake pipe pressure is reduced below the tail-end air brake pipe pressure, creating a pressure differential. When the angle cock on a car is closed before the air pressure equalizes in the brake pipe, a pressure wave is created. This wave can initiate a brake release on the car, which will then cause the brakes to release on subsequent cars. 1, record 3, English, - bottling%20the%20air
Record 3, French
Record 3, Domaine(s)
- Exploitation (Transport par rail)
- Sécurité (Transport par rail)
Record 3, Main entry term, French
- emprisonnement de l'air
1, record 3, French, emprisonnement%20de%20l%27air
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
- embouteillage de l'air 2, record 3, French, embouteillage%20de%20l%27air
masculine noun, jargon
- mise en bouteille de l'air 3, record 3, French, mise%20en%20bouteille%20de%20l%27air
feminine noun, jargon
Record 3, Textual support, French
Record number: 3, Textual support number: 1 OBS
Cette pratique peut déclencher le desserrage du frein à air. 4, record 3, French, - emprisonnement%20de%20l%27air
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Explotación (Transporte ferroviario)
- Seguridad (Transporte ferroviario)
Record 3, Main entry term, Spanish
- embotellado del aire
1, record 3, Spanish, embotellado%20del%20aire
proposal, masculine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
- embotellamiento del aire 1, record 3, Spanish, embotellamiento%20del%20aire
proposal, masculine noun
Record 3, Textual support, Spanish
Record 4 - internal organization data 2017-10-25
Record 4, English
Record 4, Subject field(s)
- Cycling
Record 4, Main entry term, English
- quick-release lever
1, record 4, English, quick%2Drelease%20lever
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
- quick release lever 2, record 4, English, quick%20release%20lever
- quick release 3, record 4, English, quick%20release
see observation
- Q-R lever 4, record 4, English, Q%2DR%20lever
- QR lever 5, record 4, English, QR%20lever
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
A lever used on a wheel hub, and sometimes a seatpost, that replaces the locknut for easy, no-tool removal or adjustment. 6, record 4, English, - quick%2Drelease%20lever
Record number: 4, Textual support number: 1 OBS
This system is most commonly found at the wheels hubs, replacing axle nuts for fastening the front or back wheels to the front or rear dropouts and allowing rapid removal and replacement of the wheel in case of a flat tire without the need for tools, by turning the lever through 180°. The system is also found at the top of the seat tube for clamping the seatpost into the seat tube and allowing the rider to raise and lower the seat while mounted. The levered quick release system may also be present at the front and rear brakes, this time as an adjustment lever that causes the caliper arms to spread, thereby allowing the wheel to be removed without deflating the tires. 2, record 4, English, - quick%2Drelease%20lever
Record number: 4, Textual support number: 2 OBS
"Quick release" is sometimes used to designate the lever rather than the system. 7, record 4, English, - quick%2Drelease%20lever
Record number: 4, Textual support number: 1 PHR
tighten a quick release 6, record 4, English, - quick%2Drelease%20lever
Record 4, Key term(s)
- quick-release levers
Record 4, French
Record 4, Domaine(s)
- Cyclisme
Record 4, Main entry term, French
- levier de blocage rapide
1, record 4, French, levier%20de%20blocage%20rapide
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- manette de blocage 2, record 4, French, manette%20de%20blocage
feminine noun
- manette du blocage 3, record 4, French, manette%20du%20blocage
feminine noun
- ailette 4, record 4, French, ailette
feminine noun
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Levier de métal incurvé que l'on manœuvre à la main pour déclencher un système de blocage rapide. 5, record 4, French, - levier%20de%20blocage%20rapide
Record number: 4, Textual support number: 1 CONT
[...] sur la roue arrière, la manette du blocage doit être montée du côté opposé au dérailleur, donc du côté gauche de la bicyclette. Par symétrie, la manette du blocage de la roue avant se place aussi du côté gauche de la roue. 3, record 4, French, - levier%20de%20blocage%20rapide
Record number: 4, Textual support number: 1 OBS
Ce système effectue le serrage et le desserrage rapide des diverses parties de la bicyclette. L'emploi le plus fréquent de ce système, conçu pour opérer un changement de roue dans un minimum de temps, est le blocage de la roue dans les encoches des pattes de la fourche, remplaçant les papillons et les écrous. Le système peut aussi effectuer le serrage de la tige de selle dans le tube de selle pour que le cycliste puisse monter et descendre la selle en roulant. Finalement, la plupart des freins à tirage latéral sont équipés d'un tel système qui facilite, en cas de roue voilée, le passage de la roue en écartant les deux mâchoires du frein sans dégonfler le pneu ou le boyau. 5, record 4, French, - levier%20de%20blocage%20rapide
Record number: 4, Textual support number: 1 PHR
bloquer une ailette 4, record 4, French, - levier%20de%20blocage%20rapide
Record 4, Key term(s)
- leviers de blocage rapides
Record 4, Spanish
Record 4, Campo(s) temático(s)
- Ciclismo
Record 4, Main entry term, Spanish
- palanca del cierre rápido
1, record 4, Spanish, palanca%20del%20cierre%20r%C3%A1pido
correct, feminine noun
Record 4, Abbreviations, Spanish
Record 4, Synonyms, Spanish
- aleta 2, record 4, Spanish, aleta
feminine noun
Record 4, Textual support, Spanish
Record number: 4, Textual support number: 1 PHR
cerrar una aleta 2, record 4, Spanish, - palanca%20del%20cierre%20r%C3%A1pido
Record 5 - internal organization data 2017-04-13
Record 5, English
Record 5, Subject field(s)
- Rolling and Suspension Components (Railroad)
- Traction (Rail)
- Braking Devices (Mechanical Components)
Record 5, Main entry term, English
- brake operating valve
1, record 5, English, brake%20operating%20valve
correct
Record 5, Abbreviations, English
Record 5, Synonyms, English
- brake valve 2, record 5, English, brake%20valve
- service valve 3, record 5, English, service%20valve
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
[A] valve that controls the application and release of brakes in accordance with automatic brake valve handle manipulation. 3, record 5, English, - brake%20operating%20valve
Record number: 5, Textual support number: 1 OBS
It is the heart of the service portion. 3, record 5, English, - brake%20operating%20valve
Record 5, French
Record 5, Domaine(s)
- Roulement et suspension (Chemins de fer)
- Traction (Chemins de fer)
- Freins (Composants mécaniques)
Record 5, Main entry term, French
- valve de commande de frein
1, record 5, French, valve%20de%20commande%20de%20frein
correct, feminine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
- valve de commande frein automatique 2, record 5, French, valve%20de%20commande%20frein%20automatique
feminine noun
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Valve que exécute les serrages et les desserrages du frein automatique. 2, record 5, French, - valve%20de%20commande%20de%20frein
Record number: 5, Textual support number: 1 OBS
C'est le cœur du module de commande de frein automatique. 2, record 5, French, - valve%20de%20commande%20de%20frein
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2016-02-15
Record 6, English
Record 6, Subject field(s)
- Braking Devices (Mechanical Components)
- Rolling Stock (Railroads)
Record 6, Main entry term, English
- automatic brake valve
1, record 6, English, automatic%20brake%20valve
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
The automatic brake valve controls the application and release of both the locomotive and the train brakes. [It] is a self-lapping, pressure-maintaining valve. 2, record 6, English, - automatic%20brake%20valve
Record 6, French
Record 6, Domaine(s)
- Freins (Composants mécaniques)
- Matériel roulant (Chemins de fer)
Record 6, Main entry term, French
- robinet de mécanicien
1, record 6, French, robinet%20de%20m%C3%A9canicien
correct, masculine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 DEF
Organe de commande de freinage du train, pouvant occuper diverses positions pour alimenter la conduite générale en air comprimé et permettre ainsi le desserrage des freins, ou, au contraire, la vider plus ou moins pour provoquer le serrage. 2, record 6, French, - robinet%20de%20m%C3%A9canicien
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 2011-03-17
Record 7, English
Record 7, Subject field(s)
- Rolling and Suspension Components (Railroad)
- Special-Language Phraseology
Record 7, Main entry term, English
- sticking brake
1, record 7, English, sticking%20brake
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
Sticking brakes occur when brakes on a car(s) remain applied after a train brake release. When sticking brakes occur : a) Stop the train as soon as possible. b) Determine why the brakes are sticking. Possible causes for sticking brakes include : Overcharged air brake system. Hand brakes applied. Retaining valve not in EXHAUST position. Leak in the air brake system. Placing the automatic brake handle in the release position while the brake pipe reduction is still exhausting. An insufficient brake pipe reduction to ensure proper release. 2, record 7, English, - sticking%20brake
Record number: 7, Textual support number: 2 CONT
The RTC Mech [Rail Traffic Control Mechanical Service Representatives] positions were established in response to a study group which examined “Why Wheels Fail.” As part of this study, it was determined that proactive monitoring and action might prevent wheel failures associated with sticking brakes. 3, record 7, English, - sticking%20brake
Record 7, Key term(s)
- sticking brakes
Record 7, French
Record 7, Domaine(s)
- Roulement et suspension (Chemins de fer)
- Phraséologie des langues de spécialité
Record 7, Main entry term, French
- blocage de frein
1, record 7, French, blocage%20de%20frein
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
- frein bloqué 2, record 7, French, frein%20bloqu%C3%A9
correct, masculine noun
- frein qui colle 3, record 7, French, frein%20qui%20colle
masculine noun
- coincement de frein 4, record 7, French, coincement%20de%20frein
masculine noun
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Les étincelles provoquées par un train aux freins bloqués ont allumé plusieurs feux à Hauterive (NE). […] Le feu s'est déclaré en plusieurs endroits [...] après le passage d'un train marchandises [...]. À cause d'un frein bloqué, le convoi a provoqué des étincelles qui ont bouté le feu à une haie de thuyas et à des branches. 2, record 7, French, - blocage%20de%20frein
Record number: 7, Textual support number: 2 CONT
L’établissement des postes de CCFM [Contrôleurs de la circulation ferroviaire – Mécanique] a fait suite aux travaux d’un groupe d’étude qui a examiné les raisons de la rupture des roues. Dans le cadre de cette étude, on a déterminé qu’une surveillance et des mesures proactives pourraient prévenir les ruptures de roues associées au blocage des freins. 5, record 7, French, - blocage%20de%20frein
Record 7, Key term(s)
- blocage de freins
- freins bloqués
- coincement de freins
- frein coincé
- freins coincés
- freins qui collent
- frein collé
- freins collés
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2008-10-22
Record 8, English
Record 8, Subject field(s)
- Taps and Plumbing Accessories
- Aircraft Systems
Record 8, Main entry term, English
- control valve
1, record 8, English, control%20valve
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 DEF
A valve which controls pressure, volume, or flow direction in a fluid transmission system. 2, record 8, English, - control%20valve
Record number: 8, Textual support number: 1 CONT
Pneumatic systems are often compared to hydraulic systems, but such comparisons can only hold true in general terms.... Control valves are... a necessary part of a typical pneumatic system.... The control valve consists of a lever with two lobes. [In the off position], a spring holds the left poppet closed so that compressed air entering the pressure port cannot flow to the brakes. [In the on position], one lobe of the lever holds the left poppet open and a spring closes the right poppet. Compressed air now flows around the opened left poppet, through a drilled passage, and into a chamber below the right poppet. Since the right poppet is closed, the high-pressure air flows out of the brake port and into the brake line to apply the brakes. To release the brakes, the control valve is returned to the off position. 3, record 8, English, - control%20valve
Record 8, French
Record 8, Domaine(s)
- Robinetterie et accessoires
- Circuits des aéronefs
Record 8, Main entry term, French
- vanne de commande
1, record 8, French, vanne%20de%20commande
correct, feminine noun, officially approved
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record number: 8, Textual support number: 1 DEF
Vanne qui contrôle la pression, le volume, la direction du débit dans un circuit de transmission de fluide. 2, record 8, French, - vanne%20de%20commande
Record number: 8, Textual support number: 1 OBS
vanne de commande : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Maintenance. 3, record 8, French, - vanne%20de%20commande
Record number: 8, Textual support number: 1 PHR
Vanne de commande de débit, de décharge, de démarrage, de pression, d'ouverture de trappe de train principal. 3, record 8, French, - vanne%20de%20commande
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2008-07-24
Record 9, English
Record 9, Subject field(s)
- Road Safety
- Police
Record 9, Main entry term, English
- gap skid mark
1, record 9, English, gap%20skid%20mark
correct
Record 9, Abbreviations, English
Record 9, Synonyms, English
- gap skidmark 2, record 9, English, gap%20skidmark
correct
- intermittent skid mark 1, record 9, English, intermittent%20skid%20mark
correct
- gap skid 3, record 9, English, gap%20skid
jargon
Record 9, Textual support, English
Record number: 9, Textual support number: 1 DEF
A braking skid mark which is interrupted by the release and reapplication of the brakes. 4, record 9, English, - gap%20skid%20mark
Record 9, Key term(s)
- intermittent skidmark
Record 9, French
Record 9, Domaine(s)
- Sécurité routière
- Police
Record 9, Main entry term, French
- trace de freinage-défreinage
1, record 9, French, trace%20de%20freinage%2Dd%C3%A9freinage
proposal, feminine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
- marque de freinage-défreinage 1, record 9, French, marque%20de%20freinage%2Dd%C3%A9freinage
proposal, feminine noun
Record 9, Textual support, French
Record number: 9, Textual support number: 1 DEF
Trace de pneu discontinue laissée sur la chaussée par une roue dont le frein est actionné, relâché puis actionné de nouveau. 1, record 9, French, - trace%20de%20freinage%2Dd%C3%A9freinage
Record number: 9, Textual support number: 1 OBS
défreinage : Action de relâcher la pression exercée sur les freins. 2, record 9, French, - trace%20de%20freinage%2Dd%C3%A9freinage
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 1993-07-02
Record 10, English
Record 10, Subject field(s)
- Closing Devices and Nozzles (Mechanical Components)
- Rolling Stock (Railroads)
- Braking Devices (Mechanical Components)
Record 10, Main entry term, English
- release control valve 1, record 10, English, release%20control%20valve
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 DEF
Valve that prevents a premature release of the brakes by preventing the charging of the equalizing reservoir after a penalty application until the automatic brake handle is moved to the release position. 1, record 10, English, - release%20control%20valve
Record 10, French
Record 10, Domaine(s)
- Obturateurs et buses (Composants mécaniques)
- Matériel roulant (Chemins de fer)
- Freins (Composants mécaniques)
Record 10, Main entry term, French
- valve de contrôle de desserrage
1, record 10, French, valve%20de%20contr%C3%B4le%20de%20desserrage
feminine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 DEF
Valve qui empêche un desserrage prématuré des freins en rendant impossible le remplissage du réservoir d'égalisation tant que le robinet de mécanicien n'est pas ramené en position de desserrage. 1, record 10, French, - valve%20de%20contr%C3%B4le%20de%20desserrage
Record 10, Spanish
Record 10, Textual support, Spanish
Record 11 - internal organization data 1993-06-30
Record 11, English
Record 11, Subject field(s)
- Closing Devices and Nozzles (Mechanical Components)
- Rolling Stock (Railroads)
- Braking Devices (Mechanical Components)
Record 11, Main entry term, English
- lock-over check valve 1, record 11, English, lock%2Dover%20check%20valve
Record 11, Abbreviations, English
Record 11, Synonyms, English
Record 11, Textual support, English
Record number: 11, Textual support number: 1 DEF
Valve that does not function in normal service; it prevents the unintentional release of the brakes due to an excessive leakage from the suppression valve in 26-C automatic brake valve or 30A-CDW brake valve. 1, record 11, English, - lock%2Dover%20check%20valve
Record 11, French
Record 11, Domaine(s)
- Obturateurs et buses (Composants mécaniques)
- Matériel roulant (Chemins de fer)
- Freins (Composants mécaniques)
Record 11, Main entry term, French
- clapet anti-desserrage
1, record 11, French, clapet%20anti%2Ddesserrage
masculine noun
Record 11, Abbreviations, French
Record 11, Synonyms, French
Record 11, Textual support, French
Record number: 11, Textual support number: 1 DEF
Clapet qui n'intervient pas en temps normal; ce n'est qu'en cas de fuite importante provenant de la valve de suppression du robinet de mécanicien 26-C ou du robinet de frein 30A-CDW que ce clapet de retenue entre en action pour prévenir un desserrage intempestif des freins. 1, record 11, French, - clapet%20anti%2Ddesserrage
Record 11, Spanish
Record 11, Textual support, Spanish
Record 12 - internal organization data 1992-03-12
Record 12, English
Record 12, Subject field(s)
- Braking Devices (Mechanical Components)
Record 12, Main entry term, English
- quick release valve 1, record 12, English, quick%20release%20valve
Record 12, Abbreviations, English
Record 12, Synonyms, English
- relay valve 1, record 12, English, relay%20valve
- relay release valve 1, record 12, English, relay%20release%20valve
Record 12, Textual support, English
Record number: 12, Textual support number: 1 OBS
Speeds up the application and release of service brakes. Sometimes also used to speed up the operation of spring brakes. 1, record 12, English, - quick%20release%20valve
Record 12, French
Record 12, Domaine(s)
- Freins (Composants mécaniques)
Record 12, Main entry term, French
- valve-relais
1, record 12, French, valve%2Drelais
feminine noun
Record 12, Abbreviations, French
Record 12, Synonyms, French
Record 12, Textual support, French
Record number: 12, Textual support number: 1 OBS
frein à air comprimé 1, record 12, French, - valve%2Drelais
Record 12, Spanish
Record 12, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada

Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools

The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies

Access Translation Bureau glossaries and vocabularies.
- Date Modified: