GB1421327A – Fluid pressure braking system
– Google Patents
GB1421327A – Fluid pressure braking system
– Google Patents
Fluid pressure braking system
Info
Publication number
GB1421327A
GB1421327A
GB3057672A
GB3057672A
GB1421327A
GB 1421327 A
GB1421327 A
GB 1421327A
GB 3057672 A
GB3057672 A
GB 3057672A
GB 3057672 A
GB3057672 A
GB 3057672A
GB 1421327 A
GB1421327 A
GB 1421327A
Authority
GB
United Kingdom
Prior art keywords
brake
piston
ports
hand lever
enclosures
Prior art date
1972-06-29
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
Application number
GB3057672A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
Priority date (The priority date 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 date listed.)
1972-06-29
Filing date
1972-06-29
Publication date
1976-01-14
1972-06-29
Application filed by Automotive Products PLC
filed
Critical
Automotive Products PLC
1972-06-29
Priority to GB3057672A
priority
Critical
patent/GB1421327A/en
1973-06-29
Priority to JP48073571A
priority
patent/JPS4963871A/ja
1976-01-14
Publication of GB1421327A
publication
Critical
patent/GB1421327A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B60T13/12—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 liquid
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
B60T13/12—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 liquid
B60T13/22—Brakes applied by springs or weights and released hydraulically
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
B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
B60T15/02—Application and release valves
B60T15/04—Driver’s valves
B60T15/041—Driver’s valves controlling auxiliary pressure brakes, e.g. parking or emergency brakes
Abstract
1421327 Fluid pressure braking systems; valves; actuators AUTOMOTIVE PRODUCTS Ltd 28 June 1973 [29 June 1972] 30576/72 Heading F2F A fluid pressure (conveniently hydraulic) braking system comprises a brake actuator 10 operable to move an actuating rod 11 to actuate a vehicle brake; the actuator 10 comprises three pistons 18, 22, 23 defining three enclosures 21, 24, 25 and the brake may be actuated by applying hydraulic pressure to enclosures 24 or 25 or by releasing pressure from enclosure 21 whereby a coil spring 31 acts to actuate the brake. Hydraulic pressure is fed to enclosure 25 during service braking when the pedal 58 of a service brake application control device 12 is depressed and pressure in the enclosure 25 acts to move the third piston 23 in the brake actuating direction and also acts in opposition to the spring 31 through the second piston 22 and the first piston 18. The pressure in enclosures 21 24 is controlled by a hand operated spool valve 38. The valve 38 has ports 46, 49 connected to a reservoir, ports 47, 48 connected to an accumulator and outlet ports 36, 37 connected respectively to enclosures 24, 21. In the inoperative position 55 of a hand lever 13 of the spool valve 38 ports 49, 36 are connected and ports 47, 37 are connected. When the vehicle is stopped temporarily the driver moves hand lever 13 to a central position so that liquid under pressure is now fed from the accumulator through the spool valve to the enclosure 24 as well as enclosure 21, and pistons 22, 23 are moved together in a brake actuating direction; and the brake is held actuated by holding of the hand lever 13 mechanically in the central position. Should the driver wish to apply the hand brake for parking, he moves the hand lever 13 to a third position 57 whereby ports 37, 36 are connected to the liquid reservoir to vent enclosures 21, 24. The coil spring 31 expands to move pistons 18, 22, 23 to apply the brake. The spring 31 acts on piston 18 via a probe 33 on a top hat section reaction member 32 and piston 18 acts on piston 22 via a plunger portion 19 passing through an aperture 20 in a wall 16 of a casing 14. The hand lever 13 connects with the spool 40 of the spool valve 38 by a plunger 44 spigoted into a bore 43 in the spool 40 and a spring 45 serves as a feel device for operation of the hand lever 13.
GB3057672A
1972-06-29
1972-06-29
Fluid pressure braking system
Expired
GB1421327A
(en)
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
GB3057672A
GB1421327A
(en)
1972-06-29
1972-06-29
Fluid pressure braking system
JP48073571A
JPS4963871A
(en)
1972-06-29
1973-06-29
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3057672A
GB1421327A
(en)
1972-06-29
1972-06-29
Fluid pressure braking system
Publications (1)
Publication Number
Publication Date
GB1421327A
true
GB1421327A
(en)
1976-01-14
Family
ID=10309815
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3057672A
Expired
GB1421327A
(en)
1972-06-29
1972-06-29
Fluid pressure braking system
Country Status (2)
Country
Link
JP
(1)
JPS4963871A
(en)
GB
(1)
GB1421327A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2380171A1
(en)
*
1977-02-10
1978-09-08
Bosch Gmbh Robert
BRAKING SYSTEM FOR MOTOR VEHICLES
1972
1972-06-29
GB
GB3057672A
patent/GB1421327A/en
not_active
Expired
1973
1973-06-29
JP
JP48073571A
patent/JPS4963871A/ja
active
Pending
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2380171A1
(en)
*
1977-02-10
1978-09-08
Bosch Gmbh Robert
BRAKING SYSTEM FOR MOTOR VEHICLES
Also Published As
Publication number
Publication date
JPS4963871A
(en)
1974-06-20
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Legal Events
Date
Code
Title
Description
1976-05-26
PS
Patent sealed
1984-02-22
PCNP
Patent ceased through non-payment of renewal fee
