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1. (WO1991006458) AIR BRAKE SYSTEM WITH THREE CHAMBER BRAKE ACTUATOR
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/006458 International Application No.: PCT/US1990/006334
Publication Date: 16.05.1991 International Filing Date: 31.10.1990
IPC:
B60T 13/26 (2006.01) ,B60T 15/04 (2006.01) ,B60T 17/08 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
13
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
10
with fluid assistance, drive, or release
24
the fluid being gaseous
26
Compressed-air systems
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
15
Construction, arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/ or B60T13/172
02
Application and release valves
04
Driver's valves
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
T
VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
17
Component parts, details, or accessories of brake systems not covered by groups B60T8/, B60T13/ or B60T15/170
08
Brake cylinders other than ultimate actuators
Applicants:
GRAHAM, John, M. [US/US]; US
Inventors:
GRAHAM, John, M.; US
Agent:
HANN, James, F.; Townsend and Townsend One Market Plaza 2000 Steuart Tower San Francisco, CA 94105, US
Priority Data:
430,75501.11.1989US
497,93222.03.1990US
Title (EN) AIR BRAKE SYSTEM WITH THREE CHAMBER BRAKE ACTUATOR
(FR) SYSTEME DE FREIN A AIR COMPRIME A ACTUATEUR DE FREIN A TROIS CHAMBRES
Abstract:
(EN) A vehicle air brake system (180) includes a novel three chamber brake actuator (182) having a service brake, chamber (8), a spring brake chamber (10) and a supplemental chamber (212). A conventional modulated spring brake control valve (78) is used to supply pressurized air to the spring brake chamber. The service brake chamber is supplied with air through the outlet of a conventional service brake application valve (68). The force applied to the actuator piston (198) can be changed to a lower force for parking and a higher force for emergencies according to the pressure applied to the spring brake and supplemental chambers.
(FR) Un système (180) de frein à air comprimé pour véhicule comprend un nouvel actuateur (182) de frein à trois chambres doté d'une chambre (8) de frein de service, d'une chambre (10) de frein à ressort ainsi que d'une chambre (202) supplémentaire. On utilise une vanne (78) de commande de frein à ressort, modulée de manière classique, afin d'acheminer de l'air sous pression à la chambre de frein à ressort. La chambre de frein de service est alimentée en air par la sortie d'une vanne (68) d'application de frein de service classique. On peut changer la force appliquée sur le piston (198) de l'actuateur afin d'exercer une force inférieure pour le parcage, et d'exercer une force supérieure en cas d'urgences, selon la pression appliquée au frein à ressort et aux chambres supplémentaires.
Designated States: AU, CA
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1990067506