GB243674A - Improvements relating to feed or pressure reducing valve devices - Google Patents
Improvements relating to feed or pressure reducing valve devicesInfo
- Publication number
- GB243674A GB243674A GB21419/25A GB2141925A GB243674A GB 243674 A GB243674 A GB 243674A GB 21419/25 A GB21419/25 A GB 21419/25A GB 2141925 A GB2141925 A GB 2141925A GB 243674 A GB243674 A GB 243674A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- spring
- piston
- port
- valve
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
243,674. Westinghouse Brake & Saxby Signal Co., Ltd., (Assignees of Farmer, C. C.). Nov. 29, 1924, [Convention date]. Pressure-reducing valves.-A pressure-reducing valve particularly adapted for maintaining the fluid pressure in the train pipe of a fluid-pressure brake system has the main valve loaded by two springs so arranged that the valve regulates at two different rates of supply according to the pressure obtaining in the train pipe or other receptacle. The main valve has two ports 17, 18 adapted to co-operate with two ports 19, 20 in the seat so that the port 18 opens in advance of the port 17 and is directly coupled to an actuating piston 16. The piston is constantly loaded by a spring 11 and a second spring 12 arranged within the spring 11 bears against an abutment 13 slidably mounted on a pin 14 which abutment engages the piston 6 when the port 18 is slightly open. Fluid pressure is admitted to the back of the piston through a restricted orifice 23 and is exhausted, when the train-pipe pressure falls through an auxiliary control valve 5 actuated by a spring-loaded diaphragm 2 subject to trainpipe pressure. The two springs may be combined in a single spring having convolutions of different diameters.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US243674XA | 1924-11-29 | 1924-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB243674A true GB243674A (en) | 1926-07-01 |
Family
ID=21820223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21419/25A Expired GB243674A (en) | 1924-11-29 | 1925-08-26 | Improvements relating to feed or pressure reducing valve devices |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR602967A (en) |
| GB (1) | GB243674A (en) |
-
1925
- 1925-08-26 GB GB21419/25A patent/GB243674A/en not_active Expired
- 1925-09-05 FR FR602967D patent/FR602967A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR602967A (en) | 1926-04-06 |
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