GB723845A - Improvements in or relating to liquid pressure servo-motor systems - Google Patents
Improvements in or relating to liquid pressure servo-motor systemsInfo
- Publication number
- GB723845A GB723845A GB2841252A GB2841252A GB723845A GB 723845 A GB723845 A GB 723845A GB 2841252 A GB2841252 A GB 2841252A GB 2841252 A GB2841252 A GB 2841252A GB 723845 A GB723845 A GB 723845A
- Authority
- GB
- United Kingdom
- Prior art keywords
- passages
- servomotor
- valve
- grooves
- pressure
- 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
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
723,845. Fluid-pressure servomotors; hydraulic transmissions. AUTOMOTIVE PRODUCTS CO., Ltd. Oct. 20, 1953 [Nov. 11, 1952], No.28412/52. Classes 69 (2) and 136. In a liquid pressure servomotor system including a double-acting servomotor 10 and a control valve 16 therefor, the control valve, when in its neutral position, connects each end of the servomotor to one of a pair of passages 31, 32 leading from a source of liquid pressure such as the accumulator 38, a non-return valve 34 or 35 being provided in each of the passages to prevent flow of liquid from either end of the servomotor cylinder 11 through the passages and thus lock the servomotor in any position to which it is set. The control valve 16 has a pair of circumferential grooves 17, 18 separated by a land 19, and a pair of diametral passages 22, 23 permanently connected by an axial bore 21 closed at both ends. The grooves 17, 18 are always in communication with passages 28, 29 leading to opposite sides of the servo-piston 12, and in the neutral position shown, are also in communication with circumferential grooves 25, 26 leading to the passages 31, 32 respectively. On movement of the valve 16 to either side of the neutral position, the grooves 17, 18 are cut off from the respective grooves 25, 26 and connected to grooves 24, 27 respectively, the latter due to the passages 21, 22, 23 and a connection 37 being permanently connected to a low-pressure reservoir 41. The accumulator 38 is supplied by a pump 40, the delivery of which is passed back to the reservoir 41 by a cut-out valve 42 when the accumulator pressure reaches a predetermined upper limit, the valve 42 restoring the connection to the accumulator at a predetermined lower limit of pressure. A follow-up connection may be provided between the valve 16 and the servomotor. The effective areas at opposite sides of the piston are equal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2841252A GB723845A (en) | 1952-11-11 | 1952-11-11 | Improvements in or relating to liquid pressure servo-motor systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2841252A GB723845A (en) | 1952-11-11 | 1952-11-11 | Improvements in or relating to liquid pressure servo-motor systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB723845A true GB723845A (en) | 1955-02-09 |
Family
ID=10275215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2841252A Expired GB723845A (en) | 1952-11-11 | 1952-11-11 | Improvements in or relating to liquid pressure servo-motor systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB723845A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133475A (en) * | 1960-11-22 | 1964-05-19 | Gen Electric | Hydraulically-actuated operating mechanism for an electric circuit breaker |
-
1952
- 1952-11-11 GB GB2841252A patent/GB723845A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133475A (en) * | 1960-11-22 | 1964-05-19 | Gen Electric | Hydraulically-actuated operating mechanism for an electric circuit breaker |
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