GB550680A - Improvements in or relating to hydraulic press circuits - Google Patents
Improvements in or relating to hydraulic press circuitsInfo
- Publication number
- GB550680A GB550680A GB711242A GB711242A GB550680A GB 550680 A GB550680 A GB 550680A GB 711242 A GB711242 A GB 711242A GB 711242 A GB711242 A GB 711242A GB 550680 A GB550680 A GB 550680A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- servomotor
- rod
- fluid
- 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
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
550,680. Hydraulic presses; fluid-pressure servomotor control systems ; valves. MULLER, J. A. May 26, 1942, No. 7112. [Classes 69 (ii) and 135] A hydraulic press which is especially applicable for acting at a predetermined pressure but not beyond is constructed with a pressure relief valve 18 connected to the pressure supply pipe 88 which delivers the pressure-fluid to an aperture 89 in the pressure cylinder 90, the valve 18 being adapted to open against the action of an adjustable spring 42 and byepass the pressure fluid via a pipe 106 to tank 85 when the predetermined pressure is reached. At this pressure also the pump 72 is adapted to be reversed by servomotor means as described in Specification 535,625, the rod 79 which controls the servomotor valve being operated by an electromagnet 75 under control of a switch 29 which is normally closed but which is opened to break a circuit which ultimately causes de-energization of the magnet 75 and reversal of the servomotor valve rod 79. The valve plunger 18 normally is closed under the action of the spring 42 and the differential pressure of the upper part 19 of the rod and the smaller part 20. The plunger carries an adjustable cam 25 which opens the switch 29 as the plunger rises to open the valve and permit the liquid to flow from an inlet 39 to outlet 40 and thence via pipe 106.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB711242A GB550680A (en) | 1942-05-26 | 1942-05-26 | Improvements in or relating to hydraulic press circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB711242A GB550680A (en) | 1942-05-26 | 1942-05-26 | Improvements in or relating to hydraulic press circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB550680A true GB550680A (en) | 1943-01-19 |
Family
ID=9826824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB711242A Expired GB550680A (en) | 1942-05-26 | 1942-05-26 | Improvements in or relating to hydraulic press circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB550680A (en) |
-
1942
- 1942-05-26 GB GB711242A patent/GB550680A/en not_active Expired
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