Pneumatically actuated parking brake

A vehicle parking brake system pneumatically actuates an air cylinder (46) to mechanically lock a wheel brake (12) in an applied position in response to a parking demand request. The air cylinder (46) includes an extendable shaft (42) that supports a lock member (62). When a parking demand request i...

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Bibliographische Detailangaben
Hauptverfasser:	MCCANN, DENIS JOHN, KRAMER, DENNIS
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL BLASTING BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES VEHICLES IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A vehicle parking brake system pneumatically actuates an air cylinder (46) to mechanically lock a wheel brake (12) in an applied position in response to a parking demand request. The air cylinder (46) includes an extendable shaft (42) that supports a lock member (62). When a parking demand request is initiated by moving a hand control (56), an air chamber is pressurized with air from a parking reservoir via a valve assembly to apply the wheel brake. Air pressure is released from the air cylinder and the lock member is moved into engagement with a brake component to lock the wheel brake in the applied condition. The wheel brake remains locked even if pressure is released from the air chamber (26). When a release command is initiated, the air cylinder is pressurized and the lock member is moved out of engagement with the brake component.