GB822165A - Improvements relating to electro-hydraulic actuators - Google Patents
Improvements relating to electro-hydraulic actuatorsInfo
- Publication number
- GB822165A GB822165A GB2948458A GB2948458A GB822165A GB 822165 A GB822165 A GB 822165A GB 2948458 A GB2948458 A GB 2948458A GB 2948458 A GB2948458 A GB 2948458A GB 822165 A GB822165 A GB 822165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jack
- piston
- check
- pump
- lines
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
822,165. Hydraulic actuators. ELECTROL Inc. April 20, 1956, No. 29484/58. Divided out of 822,164. Class 69 (2). An hydraulic actuator assembly comprises a double-acting jack 131 supplied by a gear pump 130 driven by a reversible electric motor 129, the direction of rotation of the pump and the electric motor being reversed in order to reverse the jack piston 131a. A check valve 145 is interposed in the lines between the pump and the jack, operation of the pump in one direction forces liquid past a ball check 148a or 148b to one side of the jack piston, and a piston 146 is actuated to open ball-check 148b or 148a to permit exhaust of liquid from the other side of the jack. Accumulators 133, 134 and safety valves 139, 140 are provided in the lines to the jack. At each end of the stroke of the jack a limit switch is opened to stop the electric motor. In a modification, check-valve 145 is dispensed with and a solenoid-actuated shut-off valve is provided in one of the lines. The hydraulic components form a self-contained unit. The accumulators may be of the piston or diaphragm type.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2948458A GB822165A (en) | 1958-09-15 | 1958-09-15 | Improvements relating to electro-hydraulic actuators |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2948458A GB822165A (en) | 1958-09-15 | 1958-09-15 | Improvements relating to electro-hydraulic actuators |
Publications (1)
Publication Number | Publication Date |
---|---|
GB822165A true GB822165A (en) | 1959-10-21 |
Family
ID=10292278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2948458A Expired GB822165A (en) | 1958-09-15 | 1958-09-15 | Improvements relating to electro-hydraulic actuators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB822165A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3608742A (en) * | 1967-08-30 | 1971-09-28 | Karl Fritjof Torbjorn Adolfsso | Small size crane having a hydraulically operated jib and an electromotor-driven hydraulic pump |
FR2406144A1 (en) * | 1977-10-11 | 1979-05-11 | Hills Mccanna Co | ELECTRO-HYDRAULIC CONTROL VALVE OPERATOR |
FR2426174A1 (en) * | 1978-05-17 | 1979-12-14 | Harnischfeger Corp | HYDRAULIC EARTH MOVING MACHINE CONTAINING AUTONOMOUS ELECTROHYDRAULIC MOTOR UNITS |
FR2427499A1 (en) * | 1978-06-01 | 1979-12-28 | Sarrazin Applic Hydr | INTEGRATED CONTROL DEVICE FOR FLUID CIRCUIT, AND ITS APPLICATIONS |
-
1958
- 1958-09-15 GB GB2948458A patent/GB822165A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3608742A (en) * | 1967-08-30 | 1971-09-28 | Karl Fritjof Torbjorn Adolfsso | Small size crane having a hydraulically operated jib and an electromotor-driven hydraulic pump |
FR2406144A1 (en) * | 1977-10-11 | 1979-05-11 | Hills Mccanna Co | ELECTRO-HYDRAULIC CONTROL VALVE OPERATOR |
FR2426174A1 (en) * | 1978-05-17 | 1979-12-14 | Harnischfeger Corp | HYDRAULIC EARTH MOVING MACHINE CONTAINING AUTONOMOUS ELECTROHYDRAULIC MOTOR UNITS |
FR2427499A1 (en) * | 1978-06-01 | 1979-12-28 | Sarrazin Applic Hydr | INTEGRATED CONTROL DEVICE FOR FLUID CIRCUIT, AND ITS APPLICATIONS |
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