GB770837A - Improvements in or relating to a pressure-fluid actuating assembly, particularly forhydraulic braking systems - Google Patents
Improvements in or relating to a pressure-fluid actuating assembly, particularly forhydraulic braking systemsInfo
- Publication number
- GB770837A GB770837A GB17388/55A GB1738855A GB770837A GB 770837 A GB770837 A GB 770837A GB 17388/55 A GB17388/55 A GB 17388/55A GB 1738855 A GB1738855 A GB 1738855A GB 770837 A GB770837 A GB 770837A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- guide member
- mechanical advantage
- toggle
- movement
- 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
- B60T11/165—Single master cylinders for pressurised systems
-
- 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
- B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
-
- 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
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
770,837. Hydraulic master cylinders. FAWICK, T. L. June 16, 1955 [June 29, 1954], No. 17388/55. Class 103 (1). In a pressure-fluid actuating assembly, particularly for hydraulic braking systems of vehicles, comprising a single fluid impelling member operating in a chamber, means are provided for varying the mechanical advantage of the manually actuated means such that the mechanical advantage gradually increases substantially throughout the working stroke of the fluid impelling member; yielding means being provided between the manually-actuated means and the fluid impelling member. In the embodiment illustrated, an hydraulic master cylinder unit 10 provided with a single piston 13 operable within a cylinder 12, is provided with an L-shaped foot lever 28 fulcrummed at 29 to a pair of bearing brackets 30, 30 which are secured to the casing of the master cylinder unit 10. The short arm 28a of the foot lever 28 is hinged at 32 to one end of a toggle link 33 pivoted at 34 to a sliding guide member 14 which is slidable in cylinder 12. The stem of piston 13 slides in the hollow sliding guide member 14 to a limited extent providing a lostmotion connection between the two parts and a strong compression spring 22 is interposed between the piston and the large diameter part of the sliding guide member 14 to constantly urge the two parts away from each other. In operation, during the first part of the actuating movement of the brake lever 28 the toggle 28a, 33 is at a position of low mechanical advantage such as to impart rapid motion to guide member 14 and piston 13 for quickly moving the brake shoes into contact with the brake drum. When the shoes contact the drum, the spring 22 is further compressed by movement of the guide member 14 closer to the piston, this action being concurrent with movement of the toggle elements to positions of progressively higher mechanical advantage as the braking pressure increases. A modification is described and illustrated in the Specification wherein the toggle mechanism is replaced by a cam and roller arrangement.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB17388/55A GB770837A (en) | 1955-06-16 | 1955-06-16 | Improvements in or relating to a pressure-fluid actuating assembly, particularly forhydraulic braking systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB17388/55A GB770837A (en) | 1955-06-16 | 1955-06-16 | Improvements in or relating to a pressure-fluid actuating assembly, particularly forhydraulic braking systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB770837A true GB770837A (en) | 1957-03-27 |
Family
ID=22135978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17388/55A Expired GB770837A (en) | 1955-06-16 | 1955-06-16 | Improvements in or relating to a pressure-fluid actuating assembly, particularly forhydraulic braking systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB770837A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165019A (en) * | 1984-08-29 | 1986-04-03 | Automotive Products Plc | Actuating hydraulic master cylinders |
EP0318629A1 (en) * | 1987-11-30 | 1989-06-07 | BENDIX ITALIA S.p.A. | Hydraulic pressure generator |
WO2002047949A1 (en) * | 2000-12-16 | 2002-06-20 | Delphi Technologies Inc. | Brake control systems |
-
1955
- 1955-06-16 GB GB17388/55A patent/GB770837A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165019A (en) * | 1984-08-29 | 1986-04-03 | Automotive Products Plc | Actuating hydraulic master cylinders |
EP0318629A1 (en) * | 1987-11-30 | 1989-06-07 | BENDIX ITALIA S.p.A. | Hydraulic pressure generator |
WO2002047949A1 (en) * | 2000-12-16 | 2002-06-20 | Delphi Technologies Inc. | Brake control systems |
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