GB823160A - A valve device, in particular for fluid pressure braking apparatus for road vehicles - Google Patents
A valve device, in particular for fluid pressure braking apparatus for road vehiclesInfo
- Publication number
- GB823160A GB823160A GB17598/56A GB1759856A GB823160A GB 823160 A GB823160 A GB 823160A GB 17598/56 A GB17598/56 A GB 17598/56A GB 1759856 A GB1759856 A GB 1759856A GB 823160 A GB823160 A GB 823160A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- pressure
- spring
- space
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
- B60T15/043—Driver's valves controlling service pressure brakes
- B60T15/045—Driver's valves controlling service pressure brakes in multiple circuit systems, e.g. dual circuit systems
- B60T15/046—Driver's valves controlling service pressure brakes in multiple circuit systems, e.g. dual circuit systems with valves mounted in tandem
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Control Valves For Brake Systems (AREA)
Abstract
823,160. Fluid-pressure brakes. WESTING- HOUSE BRAKE & SIGNAL CO. Ltd. June 7, 1956 [June 21, 1955], No. 17598/56. Class 103 (1). [Also in Group XXIX] A valve device for controlling fluid-pressure braking comprises apparatus for road vehicles in which the braking acts on the wheels of at least two axles of one vehicle or on the wheels of at least one axle of a tractor vehicle and on the wheels of at least one axle of a trailer vehicle, a piston control unit or member which by direct mechanical action closes the outlet valve 20 and opens the inlet valve 14 of a first valve group 15 to admit pressure fluid from a first source to a space 53. The pressure in this space 53 thereupon acts on a movable partition or piston 2 in opposition to a loading spring 36 housed in a chamber 56 open to the atmosphere. This spring acts in turn on a second movable partition or piston 3 to control by direct mechanical action the closure of the outlet valve 42 and the opening of the inlet valve 40 of a second valve group 41 whereby pressure fluid from a second source is applied to a space 47. The pressure in the second space 47 then acts on the piston 3 in opposition to the spring 36. The piston control unit comprises a closed cap 5 unitary with a piston 17 and slidable in a casing 1 against a spring 27 by means of a pedal-operated lever 9. The cap 5 provides a seat 13 for the inlet valve 14 and has a port 19 connecting a chamber 62 in the cap with a first high pressure supply port 49. One or more stops 21 are provided on the piston 17 so that if the piston 2 fails to move downwardly under fluid pressure to allow the inlet valve 14 to close it is moved positively by the stops. The piston 2 has a hollow hub 29 with ports 24 which connect the spaces 53, 56 when the outlet valve 20 is open. The lower piston 3 similarly has a hollow hub 31 with ports 34 to connect the spaces 47, 56 when the outlet valve 42 is open. A lost-motion connection comprising a head stem 25 slidable in the hub 31 is provided between the pistons 2, 3 so that the spring 36 is pre-compressed. A spring 43 stronger than the spring 27 acts on the piston 3 and normally maintains the piston 2 against a stop shoulder 57. Should the lower inlet valve 40 fail to reclose due to fluid continuously escaping from the space 47, the piston 3 engages an abutment 61. The spring 36 is then further compressed and the upper valve group 15 can still function. A higher pressure is maintained in the space 53 than the space 47 by an amount depending on the relative strengths of the springs 27, 43. The annular chamber 59 above the piston 17 is vented by a passage 60. The fluid pressure reaction below the piston 17 gives the operator a sense of feel. The unions 49, 51 are connected to separate pressure tanks and the unions 52, 54 to the brake cylinders associated with the rear and front axles, or those associated with a trailer and a tractor vehicle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT823160X | 1955-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB823160A true GB823160A (en) | 1959-11-04 |
Family
ID=11317838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17598/56A Expired GB823160A (en) | 1955-06-21 | 1956-06-07 | A valve device, in particular for fluid pressure braking apparatus for road vehicles |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB823160A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3355223A (en) * | 1966-07-28 | 1967-11-28 | Berg Mfg & Sales Co | Dual application valve |
DE1505371B1 (en) * | 1964-03-13 | 1970-02-12 | Bendix Westinghouse Automotive | Control valve, especially dual-circuit brake valve, for motor vehicles |
DE2817991A1 (en) * | 1978-04-25 | 1979-11-08 | Bosch Gmbh Robert | TWO-CIRCUIT CONTROL VALVE |
FR2510961A1 (en) * | 1981-08-04 | 1983-02-11 | Bosch Gmbh Robert | BRAKE VALVE WITH TWO CIRCUITS |
EP0157467A2 (en) * | 1984-01-28 | 1985-10-09 | Bendix Limited | Multi-circuit fluid pressure control valve |
-
1956
- 1956-06-07 GB GB17598/56A patent/GB823160A/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1505371B1 (en) * | 1964-03-13 | 1970-02-12 | Bendix Westinghouse Automotive | Control valve, especially dual-circuit brake valve, for motor vehicles |
US3355223A (en) * | 1966-07-28 | 1967-11-28 | Berg Mfg & Sales Co | Dual application valve |
DE2817991A1 (en) * | 1978-04-25 | 1979-11-08 | Bosch Gmbh Robert | TWO-CIRCUIT CONTROL VALVE |
FR2510961A1 (en) * | 1981-08-04 | 1983-02-11 | Bosch Gmbh Robert | BRAKE VALVE WITH TWO CIRCUITS |
EP0157467A2 (en) * | 1984-01-28 | 1985-10-09 | Bendix Limited | Multi-circuit fluid pressure control valve |
EP0157467A3 (en) * | 1984-01-28 | 1986-07-30 | Bendix Limited | Multi-circuit fluid pressure control valve |
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