GB412965A - Improvements in and relating to fluid pressure servo apparatus - Google Patents
Improvements in and relating to fluid pressure servo apparatusInfo
- Publication number
- GB412965A GB412965A GB47933A GB47933A GB412965A GB 412965 A GB412965 A GB 412965A GB 47933 A GB47933 A GB 47933A GB 47933 A GB47933 A GB 47933A GB 412965 A GB412965 A GB 412965A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- hydraulic
- piston
- valve
- cylinder
- 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
Abstract
412,965. Operating clutches. BROWN, D. F., and WESTINGHOUSE BRAKE & SAXBY SIGNAL CO., Ltd., 82, York Road, King's Cross, London. Jan. 6, 1933, No. 479. [Class 80 (ii).] Relates to mechanism for operating brakes, clutches or other devices, comprising a fluidpressure operated piston or equivalent, the pressure on which is transmitted to the brake shoes or equivalent through a hydraulic medium, and consists in the provision of a valve device controlled by the hydraulic pressure for limiting the pressure in the fluidpressure cylinder and thus also the hydraulic pressure, and of an arrangement of operating connections between the fluid-pressure piston and a hydraulic master piston. Fig. 2 shows a pneumatic cylinder 17 formed integrally with a casing 22 within which an hydraulic master cylinder 16 is mounted and which serves as a reservoir for the hydraulic system. The piston rod 21 of the pneumatic piston abuts on a lever 20 pivoted at 23, the other end of the lever engaging the hydraulic master piston through a thrust rod 25, neither of the pistons being positively secured to the lever. The valve device comprises a piston 8, Fig. 1, subject to the hydraulic pressure through a port 12 and having a rod 9 adapted to engage the stem 7 of a valve 2 which is subject to the air pressure in the cylinder 17 through port 4 and to the pressure of a light spring 3. The valve is normally seated at 15, and if, during the operation of the brakes &c., the hydraulic pressure is sufficient to overcome a spring 10 and the air and spring pressure on the valve, the valve is lifted and air escapes from the cylinder 17 through the passage 13 and port 6. The passage 13 may be of varying cross-section, as shown, so that the greater the excess pressure, the greater is the rate of reduction of the pressure. If the spring 10 should break, while the system is under pressure, the valve 2 is forced on to an upper seat 14 to prevent loss of pressure through the port 6 which would otherwise occur.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB47933A GB412965A (en) | 1933-01-06 | 1933-01-06 | Improvements in and relating to fluid pressure servo apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB47933A GB412965A (en) | 1933-01-06 | 1933-01-06 | Improvements in and relating to fluid pressure servo apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB412965A true GB412965A (en) | 1934-07-06 |
Family
ID=9705066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB47933A Expired GB412965A (en) | 1933-01-06 | 1933-01-06 | Improvements in and relating to fluid pressure servo apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB412965A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493377A (en) * | 1945-07-24 | 1950-01-03 | Thew Shovel Co | Automotive hydraulic braking system |
| US2537483A (en) * | 1945-02-22 | 1951-01-09 | Edward A Rockwell | Servomotor |
| US4969331A (en) * | 1988-09-30 | 1990-11-13 | Ford Motor Company | Brake master cylinder and booster assembly for automotive vehicle |
-
1933
- 1933-01-06 GB GB47933A patent/GB412965A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2537483A (en) * | 1945-02-22 | 1951-01-09 | Edward A Rockwell | Servomotor |
| US2493377A (en) * | 1945-07-24 | 1950-01-03 | Thew Shovel Co | Automotive hydraulic braking system |
| US4969331A (en) * | 1988-09-30 | 1990-11-13 | Ford Motor Company | Brake master cylinder and booster assembly for automotive vehicle |
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