GB635901A - Improvements relating to hydraulically-operated brakes of automotive vehicles - Google Patents
Improvements relating to hydraulically-operated brakes of automotive vehiclesInfo
- Publication number
- GB635901A GB635901A GB29549/46A GB2954946A GB635901A GB 635901 A GB635901 A GB 635901A GB 29549/46 A GB29549/46 A GB 29549/46A GB 2954946 A GB2954946 A GB 2954946A GB 635901 A GB635901 A GB 635901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- chambers
- partition
- gaskets
- brakes
- 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
- 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
- B60T11/20—Tandem, side-by-side, or other multiple master cylinder units
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
635,901. Elastic valves. FIAT SOC. PER AZIONI. Oct. 3, 1946, No. 29549. Convention date, Sept. 21, 1942. [Class 135] [Also in Groups XXVI and XXXIV] In a hydraulic master cylinder for operating brakes, annular gaskets 16, 19, 22 of rubber or the like are adapted by the action of spring and hydraulic pressure produced by the piston, to be expanded radially to cut-off the connection of the reservoir to the pressure chamber or to prevent leakage past the piston. The master cylinder shown is divided by a slidable partition 8 into two pressure chambers 9, 9<SP>1</SP> connected by ports 26, 26<SP>1</SP> to separate brakes, the pressure being produced by simultaneous operation of pistons 2, 21. Gaskets 19, 22 of rubber or the like normally convex at the periphery and in contact with the cylinder wall are associated with the pistons 2, 21 and the partition 8. Other gaskets 16, disposed between tubular members 14, 15, are normally spaced from the cylinder wall so that the chambers 9, 91 communicate with reservoir ports 10, 101 through holes in flanges 23 of the members 14. Springs 17, 20 are seated on plates 18 and on shoulders formed in the members 14, 15. When the pistons 2, 21 are moved to apply the brakes, the hydraulic pressure in chambers 9, 91 rises due to the resistance to flow towards the reservoirs offered by the apertured flanges 23. The gaskets 16 are thus expanded radially to contact the cylinder wall and so to cut-off the chambers from the reservoirs, by axial and radial pressure due to the springs and the hydraulic pressure acting on the gaskets. The gaskets 19, 22 are tightly pressed against the cylinder wall for the same reason, so as to prevent leakage from and between the chambers 9, 9<SP>1</SP>. Equalization of the pressure in the two chambers is effected by movement of the partition 8. The valve devices 16 are such as described in Specification 626,622. The Specification as open to inspection under Sect. 91 describes a modification, Fig. 4 (Cancelled), in which the valve device comprises a tubular member 30 which abuts on the gasket 29 of piston 28 and a sleeve 36 slidable on the member 30 and abutting on a gasket 42. Due to the springs 31, 33, the parts normally assume the position shown with the sleeve 36 against a stop 43 so that the reservoir is open to the cylinder through passages 39 in the sleeve. When the piston is moved to apply the brakes these passages are closed by the engagement of the shoulder 40 on the member 30 with a flange 41 on the member 36. The movement of the partition 27 in this form is limited by a pin-and-slot 11 which acts as a stop for the partition if the pressure fails in one pressure chamber. A further form is described which is similar to that of Fig. 2, except for the provision of the pin-and-slot device for the partition. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT254124X | 1942-09-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB635901A true GB635901A (en) | 1950-04-19 |
Family
ID=11216615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29549/46A Expired GB635901A (en) | 1942-09-21 | 1942-09-21 | Improvements relating to hydraulically-operated brakes of automotive vehicles |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE466537A (en) |
CH (1) | CH254124A (en) |
FR (1) | FR930420A (en) |
GB (1) | GB635901A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1412239A1 (en) * | 2001-07-27 | 2004-04-28 | Joseph Oscar Matthew | Master brake cylinder with opposing pistons |
-
0
- BE BE466537D patent/BE466537A/xx unknown
-
1942
- 1942-09-21 GB GB29549/46A patent/GB635901A/en not_active Expired
-
1946
- 1946-05-29 CH CH254124D patent/CH254124A/en unknown
- 1946-07-10 FR FR930420D patent/FR930420A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1412239A1 (en) * | 2001-07-27 | 2004-04-28 | Joseph Oscar Matthew | Master brake cylinder with opposing pistons |
EP1412239A4 (en) * | 2001-07-27 | 2005-11-16 | Oscar Matthew Joseph | Master brake cylinder with opposing pistons |
Also Published As
Publication number | Publication date |
---|---|
CH254124A (en) | 1948-04-15 |
FR930420A (en) | 1948-01-26 |
BE466537A (en) |
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