GB620425A - Improvements in or relating to power operated hydraulic actuators - Google Patents
Improvements in or relating to power operated hydraulic actuatorsInfo
- Publication number
- GB620425A GB620425A GB30442/46A GB3044246A GB620425A GB 620425 A GB620425 A GB 620425A GB 30442/46 A GB30442/46 A GB 30442/46A GB 3044246 A GB3044246 A GB 3044246A GB 620425 A GB620425 A GB 620425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- valve
- master cylinder
- chamber
- 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)
- Transmission Of Braking Force In Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
- Actuator (AREA)
Abstract
620,425. Fluid-pressure brakes. BENDIX AVIATION CORPORATION. Oct. 11, 1946, No. 30442. Convention date, Dec. 22, 1945. [Class 103 (i)] In pneumatically-operated hydraulic master cylinder units, particularly for operating brakes, an end plate of the pneumatic cylinder has an internally-threaded boss into which screws the hydraulic master cylinder. The system shown is such as described in Specification 550,450 in which the control valve of the pneumatic cylinder is operated by a manually-operated master cylinder 16. According to Fig. 1, the pneumatic cylinder of the unit comprises cylindrical members 94, 100 to which is secured by bolts 96 end plates 98, 102. The end plate 98 has a boss 104 threaded at 106 into which screws the master cylinder 14 formed of a length of conventional tubing and secured by a lock-nut 128. The pipe-lines 24 which lead to the brakes 18 are connected to the cylinder- 14 by a fitting 136 provided with a bleeder valve 140. The pneumatic cylinder is divided by a partition 70 into chambers for tandem pistons 56, 58 connected by a tubular rod 68. The pistons are connected by a pin 112, rod 30 and a pin at 114 to the master piston 32. Normally, as described in Specification 620,407, a ball-valve 82 is normally unseated by a forked member 88 which then abuts on a washer 110 to provide communication of' the master cylinder and pipe-lines through the piston and a port 86 with a reservoir 80. When the piston 32 is operated, the valve 82 seats. to close this communication. The manual master cylinder 16 is connected by passage 22 to a space between two pistons, one of which, 28, acts directly through the rod 30 on the master piston 32 and the other of which 36 operates the control valves 40, 74 of the pneumatic cylinder 12. The piston chambers 60, 62 of cylinder 12 are constantly connected to a vacuum source by pipe 64 and the piston chambers 52, 54 are connected together through the piston-rod 68 and by pipe 50 to the valve chamber 44, thence normally through the aperture in diaphragm 38 to chamber 46 and the pipe 48 to the. vacuum source. Pressure applied by the manual master cylinder 16 to the piston 36 causes the diaphragm to seat on the valve 40 to cut off the vacuum source from piston chambers 52, 54 and by opening the valve 74 to admit air from the atmosphere to valve chamber 44 and thus to these piston chambers, thus operating the pistons 56, 58, 32 to apply the brakes. A fast application valve, as described in Specification 620,408, comprises a diaphragm 63 mounted in the partition 70 and having the left-hand chamber connected by passage 67 to piston chamber 54 and the right-hand chamber by passages 63, 65 to valve chamber 44. If in an application the pressure in the right-hand chamber rises more rapidly than that in the left-hand chamber, the diaphragm lifts a valve 61 to admit air directly to chamber 54. In a modification, there is only one pneumatic piston, the valve is mounted upon the end plate to which the master cylinder 14 is secured and the manual master cylinder 16 is connected directly to the master cylinder 14 immediately behind the piston 32 so that no reservoir such as that shown at 80 is necessary.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US620407XA | 1945-10-08 | 1945-10-08 | |
US636582A US2617261A (en) | 1945-10-08 | 1945-12-22 | Power-operated hydraulic actuator |
US293795A US2719405A (en) | 1945-10-08 | 1952-06-16 | Power operated hydraulic actuator |
Publications (1)
Publication Number | Publication Date |
---|---|
GB620425A true GB620425A (en) | 1949-03-24 |
Family
ID=32303373
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18978/46A Expired GB620407A (en) | 1945-10-08 | 1946-06-25 | Power operated hydraulic pressure device |
GB30442/46A Expired GB620425A (en) | 1945-10-08 | 1946-10-11 | Improvements in or relating to power operated hydraulic actuators |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18978/46A Expired GB620407A (en) | 1945-10-08 | 1946-06-25 | Power operated hydraulic pressure device |
Country Status (4)
Country | Link |
---|---|
US (2) | US2617261A (en) |
DE (1) | DE975630C (en) |
FR (1) | FR933278A (en) |
GB (2) | GB620407A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3542602A1 (en) * | 1985-12-03 | 1987-06-04 | Teves Gmbh Alfred | Brake pressure transmitter for a motor vehicle hydraulic brake system |
DE3601769A1 (en) * | 1986-01-22 | 1987-07-23 | Teves Gmbh Alfred | Brake system with wheel slip control |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2685172A (en) * | 1949-08-17 | 1954-08-03 | Bendix Aviat Corp | Power-assisted master cylinder |
GB703655A (en) * | 1950-06-17 | 1954-02-10 | Edward Albert Rockwell | Improvements in or relating to fluid pressure servo-units |
US2794320A (en) * | 1950-06-17 | 1957-06-04 | Edward A Rockwell | Power augmentation apparatus for hydraulic motor systems |
US2797665A (en) * | 1953-03-30 | 1957-07-02 | Automotive Prod Co Ltd | Servo-assisted liquid pressure braking systems for vehicles |
US2867090A (en) * | 1955-04-14 | 1959-01-06 | Bendix Aviat Corp | Power actuated bleed structure |
US2976847A (en) * | 1955-06-02 | 1961-03-28 | Edward A Rockwell | Reservoir brake intensifier apparatus |
DE1105293B (en) * | 1956-11-02 | 1961-04-20 | Daimler Benz Ag | Pneumatic servo braking device, in particular for motor vehicles |
US3083694A (en) * | 1958-02-21 | 1963-04-02 | Teves Kg Alfred | Fluid pressure servomotor |
US3013536A (en) * | 1959-01-29 | 1961-12-19 | Bendix Corp | Fluid pressure motor construction |
US3064433A (en) * | 1960-12-19 | 1962-11-20 | Bendix Corp | Inexpensive master cylinder |
AU530317B2 (en) * | 1978-09-20 | 1983-07-14 | Tokico Ltd. | Vacuum booster for hydraulic brakes |
DE3741790A1 (en) * | 1987-12-10 | 1989-06-22 | Wabco Westinghouse Fahrzeug | RELAY VALVE DEVICE |
CN112901600B (en) * | 2021-01-26 | 2022-11-29 | 中车青岛四方机车车辆股份有限公司 | Hydraulic execution unit, carriage lifting system and rail vehicle |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1781869A (en) * | 1925-08-20 | 1930-11-18 | Bragg Kliesrath Corp | Hydraulically-actuated brake mechanism |
US1733936A (en) * | 1927-11-30 | 1929-10-29 | Boughton Edward Bishop | Leverage system |
US1987651A (en) * | 1932-03-07 | 1935-01-15 | Albert P Wiegand | Aircraft propeller |
US2078209A (en) * | 1932-05-06 | 1937-04-20 | Bendix Aviat Corp | Brake |
GB406785A (en) * | 1932-10-07 | 1934-03-08 | Edward Bishop Boughton | Improvements in and relating to liquid pressure braking means for vehicles |
US1978667A (en) * | 1932-10-13 | 1934-10-30 | Bendix Aviat Corp | Brake |
US2126237A (en) * | 1936-01-27 | 1938-08-09 | Kelsey Hayes Wheel Co | Method of making hydraulic cylinders |
DE696227C (en) * | 1937-05-26 | 1940-09-14 | Magneti Marelli Spa | Device for the servo control of fluid brakes for vehicles |
US2175447A (en) * | 1937-08-23 | 1939-10-10 | Gen Motors Corp | Hydraulic brake |
US2211651A (en) * | 1938-06-06 | 1940-08-13 | Hydraulic Brake Co | Fluid pressure braking system |
US2251952A (en) * | 1938-11-14 | 1941-08-12 | Bendix Aviat Corp | Transmission control |
US2260490A (en) * | 1939-06-27 | 1941-10-28 | Stelzer Berteli | Hydraulic brake booster |
US2260492A (en) * | 1939-12-09 | 1941-10-28 | Stelzer Berteli | Booster for hydraulic braking systems |
US2374545A (en) * | 1942-06-23 | 1945-04-24 | Automatic Shifters Inc | Hydraulic brake operating mechanism |
US2359687A (en) * | 1942-08-29 | 1944-10-03 | Stelzer William | Hydraulic brake booster |
US2399719A (en) * | 1942-11-26 | 1946-05-07 | Republic Aviat Corp | Aircraft structure |
-
1945
- 1945-12-22 US US636582A patent/US2617261A/en not_active Expired - Lifetime
-
1946
- 1946-06-25 GB GB18978/46A patent/GB620407A/en not_active Expired
- 1946-09-05 FR FR933278D patent/FR933278A/en not_active Expired
- 1946-10-11 GB GB30442/46A patent/GB620425A/en not_active Expired
-
1950
- 1950-09-27 DE DEB10256A patent/DE975630C/en not_active Expired
-
1952
- 1952-06-16 US US293795A patent/US2719405A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3542602A1 (en) * | 1985-12-03 | 1987-06-04 | Teves Gmbh Alfred | Brake pressure transmitter for a motor vehicle hydraulic brake system |
DE3601769A1 (en) * | 1986-01-22 | 1987-07-23 | Teves Gmbh Alfred | Brake system with wheel slip control |
Also Published As
Publication number | Publication date |
---|---|
US2617261A (en) | 1952-11-11 |
US2719405A (en) | 1955-10-04 |
DE975630C (en) | 1962-03-08 |
FR933278A (en) | 1948-04-15 |
GB620407A (en) | 1949-03-24 |
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