GB705466A - Improvements in or relating to pneumatic servo devices for hydraulic braking systems - Google Patents
Improvements in or relating to pneumatic servo devices for hydraulic braking systemsInfo
- Publication number
- GB705466A GB705466A GB19948/52A GB1994852A GB705466A GB 705466 A GB705466 A GB 705466A GB 19948/52 A GB19948/52 A GB 19948/52A GB 1994852 A GB1994852 A GB 1994852A GB 705466 A GB705466 A GB 705466A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- passage
- chamber
- sleeve
- 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
- B60T13/00—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
- B60T13/10—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 with fluid assistance, drive, or release
- B60T13/24—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 with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
- B60T13/40—Compressed-air systems indirect, i.e. compressed air booster units indirect systems
- B60T13/44—Compressed-air systems indirect, i.e. compressed air booster units indirect systems with two-chamber booster units
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
705,466. Fluid-pressure brakes. BENDIXWESTINGHOUSE AUTOMOTIVE AIR BRAKE CO. Aug. 7, 1952 [Sept. 20, 1951], No. 19948/52. Class 103(1) [Also in Group XXIX] A compressed air actuated servo-device for hydraulic brakes is controlled by a pedal operated control valve unit 56 which provides " feel " and also gives a "follow-up action". As shown in the brakes released condition, chamber 54 on one side of the pressure piston 42 is open to atmosphere through passage 78, chamber 76, open exhaust valve 80, port 110 in valve control member 84, ports 106 and 104 and passage 102 to connection 100. When pressure is applied to the pedal, control member 84 is moved by sleeve 92<SP>1</SP> on compression of spring 114 to close valve 80 and open an inlet valve 74 which allows pressure to pass from a supply connection 70 by passage 68, port 66, chamber 64, and passage 78 to space 54. Movement of the piston 42 to the right under the pressure in space 54 carries with it the sleeve 58 and parts secured thereto so that valve 74 is reclosed and valve 80 opened and piston 42 retained in a new position. "Follow-up" action is thus provided, the limits of movement of sleeve 92<SP>1</SP> to which pressure is applied directly by pedal being defined by the shoulder 98 and abutment ring 96 on the member 58. " Feel " is provided by the action of a plunger 112, one face of which forms a seating for the spring 114 and the other being subject to pressure in chamber 54 through passages 78 and 113.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US705466XA | 1951-09-20 | 1951-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB705466A true GB705466A (en) | 1954-03-10 |
Family
ID=22095947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19948/52A Expired GB705466A (en) | 1951-09-20 | 1952-08-07 | Improvements in or relating to pneumatic servo devices for hydraulic braking systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE934333C (en) |
| FR (1) | FR1068880A (en) |
| GB (1) | GB705466A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2554519A1 (en) * | 1983-11-03 | 1985-05-10 | Lucas Ind Plc | PNEUMATIC SERVO-GROUP, ESPECIALLY FOR AUTOMOTIVE VEHICLE BRAKING SYSTEMS |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2158481A1 (en) * | 1971-11-25 | 1973-06-07 | Daimler Benz Ag | EXTERNAL POWERED BRAKING DEVICE FOR MOTOR VEHICLES |
| DE3230432A1 (en) * | 1982-08-16 | 1984-02-16 | Volkswagenwerk Ag, 3180 Wolfsburg | Hydraulic servo arrangement |
-
1952
- 1952-08-07 GB GB19948/52A patent/GB705466A/en not_active Expired
- 1952-09-18 DE DEB22072A patent/DE934333C/en not_active Expired
- 1952-09-20 FR FR1068880D patent/FR1068880A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2554519A1 (en) * | 1983-11-03 | 1985-05-10 | Lucas Ind Plc | PNEUMATIC SERVO-GROUP, ESPECIALLY FOR AUTOMOTIVE VEHICLE BRAKING SYSTEMS |
| GB2149036A (en) * | 1983-11-03 | 1985-06-05 | Lucas Ind Plc | A pneumatic, e.g. vacuum operated, servo unit especially for motor vehicle braking systems |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1068880A (en) | 1954-07-01 |
| DE934333C (en) | 1955-10-20 |
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