GB752747A - Improvements in or relating to servo-operated hydraulic braking systems - Google Patents
Improvements in or relating to servo-operated hydraulic braking systemsInfo
- Publication number
- GB752747A GB752747A GB29530/54A GB2953054A GB752747A GB 752747 A GB752747 A GB 752747A GB 29530/54 A GB29530/54 A GB 29530/54A GB 2953054 A GB2953054 A GB 2953054A GB 752747 A GB752747 A GB 752747A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- servo
- slave
- pressure
- 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
- 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
- B60T13/241—Differential pressure systems
- B60T13/242—The control valve is provided as one unit with the servomotor cylinder
- B60T13/245—Hydraulic command of the control valve, hydraulic transmission to the brake
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/18—Connection thereof to initiating means
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
Abstract
752,747. Fluid-pressure servo-brakes. BENDIX AVIATION CORPORATION. Oct. 13, 1954 [Nov. 12, 1953], No. 29530/54. Class 103 (1). A spring-loaded valve member 92 is fitted at the outlet from the slave cylinder of a vacuum servo booster unit for hydraulic brakes which is such that in combination with the pressure needed to expand the brake shoes 28 against spring 29, it requires, to open it, a pressure in the slave cylinder 22, which will be in excess of that necessary to cause operation of the relay valve 65 controlling movement of the servopiston 18. This ensures that a substantial volume of liquid is not displaced from the master cylinder 57 past the slave piston 34 direct to the brakes before the servo-piston comes into effect, under which circumstances the master cylinder piston 55 might bottom and become ineffective for emergency direct operation. As shown in Fig. 2, the passage of fluid through the slave piston 34 is controlled by a ball valve 48 and seat 51, the substantial equalization of pressure on each side of the piston caused by the valve member 92 resulting in the ball 48 being urged away from its seat by the spring 49. A lightly loaded valve member 96 beyond the valve 92 provides for compensating fluid to the brake motor cylinders direct from the master cylinder reservoir. A modified form of slave piston having only a single passage therethrough is also described. Specification 620,593 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US752747XA | 1953-11-12 | 1953-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB752747A true GB752747A (en) | 1956-07-11 |
Family
ID=22124639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29530/54A Expired GB752747A (en) | 1953-11-12 | 1954-10-13 | Improvements in or relating to servo-operated hydraulic braking systems |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1104363B (en) |
| FR (1) | FR1115982A (en) |
| GB (1) | GB752747A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1198513B (en) * | 1961-10-30 | 1965-08-12 | Graubremse Gmbh | Hydro-pneumatic control for the clutch and brake of hoists |
| US3143930A (en) * | 1962-03-21 | 1964-08-11 | Kelsey Hayes Co | Fluid pressure motor mechanism |
| DE3728463A1 (en) * | 1987-08-26 | 1989-03-09 | Wabco Westinghouse Fahrzeug | CONTROL VALVE DEVICE |
| GB8729466D0 (en) * | 1987-12-17 | 1988-02-03 | Automotive Prod Plc | Vehicle brake systems |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE716384C (en) * | 1938-04-17 | 1942-01-17 | Audi Nsu Auto Union Ag | Master pressure cylinder for fluid brakes, especially for motor vehicles |
| IT454601A (en) * | 1943-03-22 | 1900-01-01 | ||
| US2433953A (en) * | 1943-04-12 | 1948-01-06 | Automatic Shifters Inc | Pressure booster for hydraulic brake systems |
| US2536461A (en) * | 1945-03-05 | 1951-01-02 | Bendix Aviat Corp | Booster device for fluid pressure system |
-
1954
- 1954-10-13 GB GB29530/54A patent/GB752747A/en not_active Expired
- 1954-11-04 DE DEB33256A patent/DE1104363B/en active Pending
- 1954-11-09 FR FR1115982D patent/FR1115982A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1104363B (en) | 1961-04-06 |
| FR1115982A (en) | 1956-05-02 |
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