GB690038A - Improvements relating to pneumatically operated valve mechanisms - Google Patents
Improvements relating to pneumatically operated valve mechanismsInfo
- Publication number
- GB690038A GB690038A GB97450A GB97450A GB690038A GB 690038 A GB690038 A GB 690038A GB 97450 A GB97450 A GB 97450A GB 97450 A GB97450 A GB 97450A GB 690038 A GB690038 A GB 690038A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- air
- port
- branch
- 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
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
690,038. Valves controlled by auxiliary valves. HUGHES, Ltd., G. H. Jan. 15, 1951 [Jan. 14, 1950], No. 974/50. Class 135, A valve mechanism for controlling the supply and release of pressure fluid to pneumatically-operated apparatus is operated by a double-acting differential piston. As shown, a valve casing 5, Fig. 1, housing a spring-urged inlet valve 3 controlling the passage of air from a supply main to the operated apparatus through ports 10, 11, houses in axial alignment with the valve 3 a two-part piston 14 formed with a depending stem 14b having on its undersurface an exhaust valve 28 engageable with a seat 8a and a further reduced diameter stem 14c engagable with the stem 3a of the inlet valve 3. Chambers 16, 13 in which the piston parts 14a, 14e slide are connected by ports 18, 19 respectively, through branch lines to the supply main, a cock being interposed in the branch to the chamber 13. In operation, on the opening of a hand or pedal-actuated valve, air is supplied to ports 10, 18, whence the piston 14 moves downwardly to close the exhaust valve 28 and open the inlet valve 3 to supply air to the apparatus. On completion of the operation, the cock in the branch to the chamber 13 is opened to admit air beneath the larger face of the piston 14 which then moves upwardly to open the exhaust valve and permit the closure of the inlet valve by its spring 9. In a modification, the exhaust valve 28 is resiliently connected to the piston 14 by a spring 29, Fig. 2, to provide a time lag between the closing of the exhaust valve and the opening of the inlet valve. A further two-part piston 22 is provided formed on its lower surface with a valve controlling a port 24 to the chamber 16. Ports 27, 31 connect the upper and lower surfaces of this piston 22 through branch lines to the lines connecting the port 11 to the operated apparatus and the port 10 to the supply main respectively. A further branch having a cock interposed therein connects the port 19 to the operated apparatus. The purpose of the second piston is to trap air in the chamber 16 and hold the valve 3 off its seat even though the supply of air to the port 31 may be stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB97450A GB690038A (en) | 1950-01-14 | 1950-01-14 | Improvements relating to pneumatically operated valve mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB97450A GB690038A (en) | 1950-01-14 | 1950-01-14 | Improvements relating to pneumatically operated valve mechanisms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB690038A true GB690038A (en) | 1953-04-08 |
Family
ID=9713796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB97450A Expired GB690038A (en) | 1950-01-14 | 1950-01-14 | Improvements relating to pneumatically operated valve mechanisms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB690038A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1052762B (en) * | 1956-02-07 | 1959-03-12 | Elektrotechnicke Zd Y Julia Fu | Control valve for the optional connection of a central inlet with one of two outlets arranged on either side of the inlet |
| GB2201227A (en) * | 1987-02-18 | 1988-08-24 | Ferranti Plc | Hydraulic valve |
| EP1255044A1 (en) * | 2001-05-02 | 2002-11-06 | Ross Operating Valve Company | Variable pressure control device |
-
1950
- 1950-01-14 GB GB97450A patent/GB690038A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1052762B (en) * | 1956-02-07 | 1959-03-12 | Elektrotechnicke Zd Y Julia Fu | Control valve for the optional connection of a central inlet with one of two outlets arranged on either side of the inlet |
| GB2201227A (en) * | 1987-02-18 | 1988-08-24 | Ferranti Plc | Hydraulic valve |
| US4848404A (en) * | 1987-02-18 | 1989-07-18 | Doyle Hickok | Hydraulic valve |
| GB2201227B (en) * | 1987-02-18 | 1991-05-22 | Ferranti Plc | Hydraulic valve |
| EP1255044A1 (en) * | 2001-05-02 | 2002-11-06 | Ross Operating Valve Company | Variable pressure control device |
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