GB1085893A - Improvements relating to fluid operated actuators - Google Patents
Improvements relating to fluid operated actuatorsInfo
- Publication number
- GB1085893A GB1085893A GB1864864A GB1864864A GB1085893A GB 1085893 A GB1085893 A GB 1085893A GB 1864864 A GB1864864 A GB 1864864A GB 1864864 A GB1864864 A GB 1864864A GB 1085893 A GB1085893 A GB 1085893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- rod
- piston
- pins
- lever
- 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
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
1,085,893. Fluid-pressure servomotor systems. WALLACE & TIERNAN Ltd. April 6, 1965 [May 5, 1964], No. 18648/64. Heading G3P. A fluid-pressure actuator comprises a differential piston 1 having an output rod 6, the chamber 35 on the smaller area side being fed with fluid from an inlet 34 and the chamber 44 on the larger area side being connected to the chamber 35 or exhaust under the control of valve 28 on a rod 38. The rod is moved by a pressure signal fed to the space 43 between interconnected diaphragms 14, 15 of different effective areas such that the signal acts against a lever 18, pivoted at 19 and loaded by a spring 23. The opposite end of the spring is mounted through a rod 49 on a U-shaped carrier 51 pivoted at 52 and having a limb 64 which is engaged by pins 61, 62, 63 on a rotatable plate 59, the pins effectively forming a cam surface. The plate 59 is connected by a rod 66 and a universal joint 68 to an assembly comprising the lever pivot 19 and diaphragm assembly which is fixed to the piston 1 through a rod 10. In operation, a change in the signal pressure causes actuation of the valve 28 to move the piston 1. The movement of the piston carries with it the pivot 19 of lever 18 and also the joint 68 and thus rotates plate 59, which, through the pins 61, 62, 63, rotates the U-shaped carrier 51. The two ends of the spring 23 are thus adjusted until the force on the lever 18 again balances the new signal pressure and the arrangement of the pins is such that the piston 1 moves a distance proportional to the square root of the change in the signal pressure. The signal pressure may be provided in response to a pressure differential across an orifice in a flow path and since this pressure differential is proportional to the square of the flow, the output is proportional to the flow. The output member 6 may control the displacement of a pump 7 feeding additive to the flow path. It is also stated that the member 6 may control a valve or work-table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1864864A GB1085893A (en) | 1964-05-05 | 1964-05-05 | Improvements relating to fluid operated actuators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1864864A GB1085893A (en) | 1964-05-05 | 1964-05-05 | Improvements relating to fluid operated actuators |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1085893A true GB1085893A (en) | 1967-10-04 |
Family
ID=10116071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1864864A Expired GB1085893A (en) | 1964-05-05 | 1964-05-05 | Improvements relating to fluid operated actuators |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1085893A (en) |
-
1964
- 1964-05-05 GB GB1864864A patent/GB1085893A/en not_active Expired
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