GB620408A - Power device for hydraulic pressure systems, more particularly for operating brakes - Google Patents
Power device for hydraulic pressure systems, more particularly for operating brakesInfo
- Publication number
- GB620408A GB620408A GB18979/46A GB1897946A GB620408A GB 620408 A GB620408 A GB 620408A GB 18979/46 A GB18979/46 A GB 18979/46A GB 1897946 A GB1897946 A GB 1897946A GB 620408 A GB620408 A GB 620408A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- chambers
- chamber
- master 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
- B60T13/242—The control valve is provided as one unit with the servomotor cylinder
- B60T13/245—Hydraulic command of the control valve, hydraulic transmission to the brake
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B17/00—Combinations of telemotor and servomotor systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Braking Systems And Boosters (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
620,408. Fluid-pressure brake systems. BENDIX AVIATION CORPORATION. June 25, 1946, No. 18979. Convention date, Oct. 22, 1945. [Class 103 (i)] In a fluid-pressure-operated power unit such as described in Specification 580,468 and comprising a control valve for the power cylinder, controlled by a manually-operated hydraulic master cylinder, and including a second master cylinder operated by the power cylinder and connected to brakes or other device to be operated, the control valve and the second master cylinder are arranged at opposite ends of the unit and the fast application valve which is adapted to connect one of the piston chambers of the power cylinder to the atmosphere or other pressure source separately from the control valve is arranged within that piston chamber. As shown, a cylinder 12 divided by a fixed partition 14 contains tandem pistons 16, 18 connected by a tubular rod 20 and operating by a rod 26, the piston 28 of a hydraulic master cylinder 36 connected to brake cylinders 34. The master cylinder 36 is normally connected to a reservoir 42 by a passage 38 through the piston. The piston chambers 50, 54 are constantly connected to a vacuum source by a pipe 92 and ports 90, 94. The control valve comprises a diaphragm 82 carrying the seat 98 of a vacuum valve 64 connected by a rod to an application valve 62 adapted to connect the valve chamber 86 to atmosphere through chamber 104. Normally, the valve 62 is seated and diaphragm 82 is held away from valve 64 by spring 100 so that valve chambers 84, 86 are connected and as these chambers are respectively connected to the vacuum pipe 92 and to the piston chamber 48 by pipe 88 and piston chambers 48, 52 are connected by the rod 20, all these chambers are normally under vacuum. The diaphragm 82 is operated by the pedal-operated master cylinder 74 acting through pipe 72 and chamber 68 on a piston 66. The pressure in chamber 68 also acts on a piston 76, the rod 76<SP>1</SP> of which thus transmits the pressure in the master cylinder 74 directly to the pistons 16, 18 and thus to the brakes. When the master cylinder 74 is operated, the diaphragm 82 seats on the valve 64 and opens valve 62 to admit air to chamber 86, and thence to the piston chambers 48, 52, thus operating the pistons and master cylinder 36. The increase in volume of chamber 68 due to the piston 76 following-up the movement of pistons 16, 18 tends to return the diaphragm 82 to the lap position. Further, since the diaphragm 82 is subject to the same pressure differential as the pistons 16, 18, the pressure applied to the master cylinder 74 is proportional to that applied to the brakes so that the braking pressure is indicated to the operator. The fast application valve which may be as described in Specification 597,890, comprises chambers 114, 116 formed in the partition 14 and divided by a diaphragm 118 connected to a valve 110. Chambers 114, 116 are respeetively connected to valve chamber 86 by pipe 122 and to piston chamber 52 by passage 120. Thus, if in a brake application the pressure rise in chambers 52 and 116 lags behind that in chambers 116, 86 and 48, the valve 110 is unseated to admit air directly to chamber 52 by passage 108.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US580468XA | 1943-10-04 | 1943-10-04 | |
US620408XA | 1945-10-22 | 1945-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB620408A true GB620408A (en) | 1949-03-24 |
Family
ID=26737168
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18939/44A Expired GB580468A (en) | 1943-10-04 | 1944-10-03 | Improvements in or relating to manual and booster actuated hydraulic systems, particularly hydraulic braking systems |
GB18979/46A Expired GB620408A (en) | 1943-10-04 | 1946-06-25 | Power device for hydraulic pressure systems, more particularly for operating brakes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18939/44A Expired GB580468A (en) | 1943-10-04 | 1944-10-03 | Improvements in or relating to manual and booster actuated hydraulic systems, particularly hydraulic braking systems |
Country Status (2)
Country | Link |
---|---|
FR (3) | FR926242A (en) |
GB (2) | GB580468A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2642414B1 (en) * | 1989-02-01 | 1991-04-26 | Rhone Poulenc Chimie | PROCESS FOR THE MANUFACTURE OF AGGLOMERATES OF ACTIVE ALUMIN, AGGLOMERATES OBTAINED BY THE PROCESS AND DEVICE FOR IMPLEMENTING SAME |
-
1944
- 1944-10-03 GB GB18939/44A patent/GB580468A/en not_active Expired
-
1946
- 1946-05-02 FR FR926242D patent/FR926242A/en not_active Expired
- 1946-06-25 GB GB18979/46A patent/GB620408A/en not_active Expired
- 1946-06-26 FR FR54786D patent/FR54786E/en not_active Expired
- 1946-09-07 FR FR55164D patent/FR55164E/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR55164E (en) | 1951-10-02 |
GB580468A (en) | 1946-09-09 |
FR54786E (en) | 1950-08-01 |
FR926242A (en) | 1947-09-25 |
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