GB1365339A - Differential protection valve for vehicle braking systems - Google Patents
Differential protection valve for vehicle braking systemsInfo
- Publication number
- GB1365339A GB1365339A GB4785771A GB4785771A GB1365339A GB 1365339 A GB1365339 A GB 1365339A GB 4785771 A GB4785771 A GB 4785771A GB 4785771 A GB4785771 A GB 4785771A GB 1365339 A GB1365339 A GB 1365339A
- Authority
- GB
- United Kingdom
- Prior art keywords
- service
- line
- inlet
- valve
- valve head
- 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
- B60T13/261—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air
- B60T13/263—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air specially adapted for coupling with dependent systems, e.g. tractor-trailer systems
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
1365339 Brake valves CLAYTON DEWANDRE CO Ltd 20 Sept 1972 [14 Oct 1971] 47857/71 Heading F2F A differential protection valve for a vehicle has an inlet 2 connected to the service braking line, a second inlet 3 connected to a secondary, emergency or parking line and outlets 5 connected to spring brake actuators the valve being such that if the service brakes are applied with the secondary line exhausted and the spring brake actuators applied the service line pressure displaces a sleeve 10 and valve head 7a until the latter engages a seat 11 thereby interrupting the path from inlet 3 to outlets 5. Increased service pressure above a predetermined value effects continued movement of sleeve 10 causing a seal 8 on a flange 9 to move away from a valve head 7 thereby connecting inlet 2 to the spring brake actuators to decrease the effective load thereof and prevent overloading of the brakes and linkage. If the secondary line is exhausted while the service braking is operative at a pressure in excess of the predetermined value, valve head 7a closes against seat 11 to prevent the secondary line application until the service braking is released thereby preventing vehicle "roll-back".
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4785771A GB1365339A (en) | 1971-10-14 | 1971-10-14 | Differential protection valve for vehicle braking systems |
DE19722250204 DE2250204A1 (en) | 1971-10-14 | 1972-10-13 | DIFFERENTIALLY ACTING PROTECTIVE VALVE FOR PRESSURE FLUID ACTUATED BRAKE ARRANGEMENTS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4785771A GB1365339A (en) | 1971-10-14 | 1971-10-14 | Differential protection valve for vehicle braking systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1365339A true GB1365339A (en) | 1974-08-29 |
Family
ID=10446490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4785771A Expired GB1365339A (en) | 1971-10-14 | 1971-10-14 | Differential protection valve for vehicle braking systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE2250204A1 (en) |
GB (1) | GB1365339A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605444A1 (en) * | 1985-02-23 | 1986-09-25 | Graubremse Gmbh, 6900 Heidelberg | Air brake system for trailers |
-
1971
- 1971-10-14 GB GB4785771A patent/GB1365339A/en not_active Expired
-
1972
- 1972-10-13 DE DE19722250204 patent/DE2250204A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2250204A1 (en) | 1973-04-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |