WO2014003695A1 - Quick release coupling - Google Patents
Quick release coupling Download PDFInfo
- Publication number
- WO2014003695A1 WO2014003695A1 PCT/TR2013/000086 TR2013000086W WO2014003695A1 WO 2014003695 A1 WO2014003695 A1 WO 2014003695A1 TR 2013000086 W TR2013000086 W TR 2013000086W WO 2014003695 A1 WO2014003695 A1 WO 2014003695A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- poppet
- coupling
- female coupling
- seal ring
- shuttle valve
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/22—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts
- F16L37/23—Couplings of the quick-acting type in which the connection is maintained by means of balls, rollers or helical springs under radial pressure between the parts by means of balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
- F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied
- F16L37/35—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied at least one of the valves having an axial bore
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/28—Couplings of the quick-acting type with fluid cut-off means
- F16L37/30—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings
- F16L37/32—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied
- F16L37/36—Couplings of the quick-acting type with fluid cut-off means with fluid cut-off means in each of two pipe-end fittings at least one of two lift valves being opened automatically when the coupling is applied with two lift valves being actuated to initiate the flow through the coupling after the two coupling parts are locked against withdrawal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/50—Couplings of the quick-acting type adjustable; allowing movement of the parts joined
- F16L37/505—Couplings of the quick-acting type adjustable; allowing movement of the parts joined allowing substantial longitudinal adjustment or movement
Definitions
- The_pxesent invention relates to quick release coupling which is used to connect the equipments that are used in agricultural tractors and in similar agricultural machinery, in heavy equipment and in industrial applications to the hydraulic system.
- couplings are used in order to connect the equipments that are used in agricultural tractors and in similar agricultural machinery, in heavy equipment and in industrial applications to the hydraulic system.
- Coupling is used in machinery to transmit a motion to other equipment. If care is not taken during their selection and assembly, couplings become the most costly member of manufacturing which have an important function in safe motion transmission and which is perhaps the simplest and which appear to be the cheapest member in the system depending on the machine onto which it is mounted. Current improvements are available in relation with couplings.
- the piston and the poppet are designed as separate parts.
- the pressurised fluid gets to the rear side of the piston by passing through a borehole in the poppet.
- this coupling has a sealing element on its rear side which relieves the pressure.
- Obstruction problems are encountered due to obscuring by springs of the poppet borehole which is used to pass the oil to the rear side of the piston.
- the pressure transmitted to the rear side of the piston depends on the system pressure.
- the United States Patent document number 6016835 as another one of these improvements has similar characteristics with the US patent number 4598896. Further to the previous patent, the bores transferring the pressurised fluid to the rear side of the piston are relocated onto the piston from the poppet in the US patent number 6016835 and a sealing element is used to retain the pressure on the rear side of the piston. However, problems may occur during long operational periods as the system used to retain the fluid trapped at the rear side of the piston is not able to provide hundred per cent sealing. In the US patent number 6016835, the obstruction problem arising from the springs is avoided by relocating the bores onto the piston.
- Occurrence of pressure disequilibrium on the rear side of the piston is not prevented by using a sealing element on the check valve body in order to assure pressure equilibrium on the rear side of the piston.
- pressure cannot be retained during intermediate strokes since the sealing element cannot perform its function until the piston reaches to its maximum stroke.
- Object of this invention is to provide a quick release coupling where it is envisaged to avoid obstruction of flow by removing the springs from the flow path while assuring oil passage through the poppet to the rear side of the piston by means of the internal form of the poppet.
- Another object of this invention is to provide a quick release coupling where an equal pressure is always assured to exist by providing an uninterrupted connection between the front and rear sides of the poppet by relocating the bore onto the poppet and therefore the forces resulting from the pressure acting on it become equal.
- Another object of this invention is to provide a quick release coupling where connection with the tank line is established without encountering any disruptions by using ball chain instead of the spring that is used for securing in the prior art.
- Another object of this invention is that special sealing elements are used so that the pressure trapped on the rear side of the piston, during long operational periods (particularly in applications where flow is always towards the female coupling from the male coupling like it is in hydraulic motors rather than in cylinders), shall trap the pressure on the rear side of the female coupling and shall make the piston push the poppet by assuring hundred per cent sealing.
- Purpose of these sealing elements is also to provide a quick release coupling aiming to avoid occurring of problems when mounting the male coupling during the next process by relieving the pressure trapped on the rear side of the piston when dismounting the male coupling after it has completed its function.
- FIGURE- 1 Is a schematic view of the quick release coupling.
- FIGURE-2 Is another schematic view of the quick release coupling.
- FIGURE-3 Is another schematic view of the quick release coupling.
- FIGURE-4 Is the side-sectional view of the quick release coupling.
- the female coupling (3) is in the neutral position, namely, the male coupling (21) is not mounted yet.
- the fluid remains in the female coupling (3) by means of the female coupling poppet (6) and the sealing element (7) even when oil arrives to the female coupling (3) from the inlet line (8).
- the fluid pass to the rear side of the piston (27) it first has to enter through the inlet port (8) and then it has to pass through, in respective order, the poppet oil passage bore (9), the poppet groove (10), the shuttle valve body groove (1 1), the shuttle valve orifice oil passage notch (13) and the shuttle valve body oil passage bore (12) and then it is transferred to the rear side of the piston (27).
- the operational condition of the quick release coupling (1) namely, the entirely mounted condition of the male coupling (21) is illustrated.
- fluid enters through the inlet port (8) and arrives to the equipment connection point (23) bay passing through the female coupling poppet (6), the female coupling body (5), the male coupling poppet (20) and between the male coupling body (18).
- the shuttle valve ball (24) shifts from its position in Figure 1 to its position in Figure 2, namely, it interrupts the connection between the poppet side and the rear side of the piston (27) by resting against the shuttle valve seal ring (26).
- the maximum pressure value pushes the piston (31) leftwards by remaining between the shuttle valve seal ring (26), the rubber rings (28, 29), and the restricted seal ring (30).
- the female coupling poppet (6) opens the passage of flow by pushing the male coupling poppet (20).
- Dismounting condition of the male coupling (21) is illustrated in Figure-3.
- the balls (15) allow the male coupling (21 ) to smoothly detach from the female coupling (3) by engaging the dismounting surface (32) of the ball locking socket (16). Meanwhile the restricted seal ring (30) assure that the pressure entrapped on the rear surface of the piston (27) would not influence the mounting/dismounting forces during the next usage by relieving the pressure entrapped on the rear surface of the piston (27) through the relief ports (36) by travelling on the extractor rod (35).
- a securing ball chain (37) is illustrated which retains the whole system during the course of all the processes shown in the previous figures.
- the securing ball chain (37) is mounted by means of the ball chain mounting bolt (38) after mounting the female coupling (3) and it retains its position during the whole process.
- the quick release coupling system (1) is assured to operate always at the same position.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The present invention relates to quick release cartridge coupling (1) which is used to connect to the hydraulic system equipment that is used in agricultural tractors, agricultural machinery, heavy equipment and industrial applications.
Description
QUICK RELEASE COUPLING
Technical field
The_pxesent invention relates to quick release coupling which is used to connect the equipments that are used in agricultural tractors and in similar agricultural machinery, in heavy equipment and in industrial applications to the hydraulic system.
Prior Art
Presently, couplings are used in order to connect the equipments that are used in agricultural tractors and in similar agricultural machinery, in heavy equipment and in industrial applications to the hydraulic system.
Coupling is used in machinery to transmit a motion to other equipment. If care is not taken during their selection and assembly, couplings become the most costly member of manufacturing which have an important function in safe motion transmission and which is perhaps the simplest and which appear to be the cheapest member in the system depending on the machine onto which it is mounted. Current improvements are available in relation with couplings.
In the United States Patent document number 4598896 which comprises one of these improvements, the piston and the poppet are designed as separate parts. The pressurised fluid gets to the rear side of the piston by passing through a borehole in the poppet. Thus, by pushing the poppet forwards due to the difference in the piston surface area, it makes the flow pass through by opening the check-valve poppet or the ball of the male coupling. Furthermore, this coupling has a sealing element on its rear side which relieves the pressure. Obstruction problems are encountered due to obscuring by springs of the poppet borehole which is used to pass the oil to the rear side of the piston. Furthermore, the pressure transmitted to the rear side of the piston depends on the system pressure. For that reason, problems are encountered like failing of the female coupling to open the check
valve of the male coupling and thus becoming unable to stop the flow when the system pressure is reduced or when a high pressure develops on the rear side of the male coupling and when the flow is from the male coupling towards the female-coupling-.
The United States Patent document number 6016835 as another one of these improvements has similar characteristics with the US patent number 4598896. Further to the previous patent, the bores transferring the pressurised fluid to the rear side of the piston are relocated onto the piston from the poppet in the US patent number 6016835 and a sealing element is used to retain the pressure on the rear side of the piston. However, problems may occur during long operational periods as the system used to retain the fluid trapped at the rear side of the piston is not able to provide hundred per cent sealing. In the US patent number 6016835, the obstruction problem arising from the springs is avoided by relocating the bores onto the piston. Occurrence of pressure disequilibrium on the rear side of the piston is not prevented by using a sealing element on the check valve body in order to assure pressure equilibrium on the rear side of the piston. However, pressure cannot be retained during intermediate strokes since the sealing element cannot perform its function until the piston reaches to its maximum stroke.
Summary of the invention
Object of this invention is to provide a quick release coupling where it is envisaged to avoid obstruction of flow by removing the springs from the flow path while assuring oil passage through the poppet to the rear side of the piston by means of the internal form of the poppet.
Another object of this invention is to provide a quick release coupling where an equal pressure is always assured to exist by providing an uninterrupted connection between the front and rear sides of the poppet by relocating the bore onto the
poppet and therefore the forces resulting from the pressure acting on it become equal.
Another object of this invention is to provide a quick release coupling where connection with the tank line is established without encountering any disruptions by using ball chain instead of the spring that is used for securing in the prior art.
Another object of this invention is that special sealing elements are used so that the pressure trapped on the rear side of the piston, during long operational periods (particularly in applications where flow is always towards the female coupling from the male coupling like it is in hydraulic motors rather than in cylinders), shall trap the pressure on the rear side of the female coupling and shall make the piston push the poppet by assuring hundred per cent sealing. Purpose of these sealing elements is also to provide a quick release coupling aiming to avoid occurring of problems when mounting the male coupling during the next process by relieving the pressure trapped on the rear side of the piston when dismounting the male coupling after it has completed its function.
Detailed description of the invention The quick release coupling realised to attain the object of this invention is illustrated in the attached figures, where these figures are;
FIGURE- 1 Is a schematic view of the quick release coupling.
FIGURE-2 Is another schematic view of the quick release coupling. FIGURE-3 Is another schematic view of the quick release coupling.
FIGURE-4 Is the side-sectional view of the quick release coupling.
The parts in the figures are numbered individually and their meanings are given below;
1. Quick release coupling
2. Body
3... Eemale_coupJ ing_
4. Seal ring
5. Female coupling body
6. Female coupling poppet
7. Poppet seal ring
8. Fluid inlet port
9. Poppet oil passage bore
10. Poppet groove
11. Shuttle valve body groove
12. Shuttle valve body oil passage bore
13. Shuttle valve orifice oil passage notch
14. External seal ring
15. Locking ball
16. Ball locking socket
17. External sealing element
18. Male coupling body
19. Male coupling spring
20. Male coupling poppet
21. Male coupling
22. Female coupling poppet spring
23. Equipment connection point
24. Shuttle valve ball
25. Shuttle valve orifice
26. Shuttle valve seal ring
27. Piston rear surface
28. Seal ring
29. Seal ring
30. Restricted seal ring
31. Piston
32. Dismounting surface
33. Working surface
34. Mounting surface
35. Extractor rod
36. Pressure relieve port
37. Securing ball chain
38. Ball chain mounting bolt The female coupling (3) is in the neutral position, namely, the male coupling (21) is not mounted yet. When in this position, the fluid remains in the female coupling (3) by means of the female coupling poppet (6) and the sealing element (7) even when oil arrives to the female coupling (3) from the inlet line (8). In order the fluid pass to the rear side of the piston (27) it first has to enter through the inlet port (8) and then it has to pass through, in respective order, the poppet oil passage bore (9), the poppet groove (10), the shuttle valve body groove (1 1), the shuttle valve orifice oil passage notch (13) and the shuttle valve body oil passage bore (12) and then it is transferred to the rear side of the piston (27).
The operational condition of the quick release coupling (1), namely, the entirely mounted condition of the male coupling (21) is illustrated. Under this condition, fluid enters through the inlet port (8) and arrives to the equipment connection point (23) bay passing through the female coupling poppet (6), the female coupling body (5), the male coupling poppet (20) and between the male coupling body (18). Meanwhile, the shuttle valve ball (24) shifts from its position in Figure 1 to its position in Figure 2, namely, it interrupts the connection between the poppet side and the rear side of the piston (27) by resting against the shuttle valve seal ring (26). By that way the maximum pressure value pushes the piston (31) leftwards by remaining between the shuttle valve seal ring (26), the rubber rings (28, 29), and the restricted seal ring (30). By means of this pushing force, the
female coupling poppet (6) opens the passage of flow by pushing the male coupling poppet (20).
Flow cannot be assured if pressure is not trapped on the rear side of th Tpiston (27) as the male coupling poppet (20) will not come out since the male coupling spring (19) is stiffer than the female coupling poppet spring (22). In another position, when there is trapped fluid at the equipment connection point (23), this pressure will make the male coupling poppet (20) difficult to open by pressing against it. However, by means of the pushing force resulting from the pressurised fluid on the rear side of the piston (27), flow is initiated by making the male coupling poppet (20) open by pushing the female coupling poppet (6). Under this condition, the shuttle valve ball (24) maintains the pressure on the rear side of the piston (27) by travelling on the shuttle valve seal ring (26) in order to ensure pressure equilibrium.
Dismounting condition of the male coupling (21) is illustrated in Figure-3. The balls (15) allow the male coupling (21 ) to smoothly detach from the female coupling (3) by engaging the dismounting surface (32) of the ball locking socket (16). Meanwhile the restricted seal ring (30) assure that the pressure entrapped on the rear surface of the piston (27) would not influence the mounting/dismounting forces during the next usage by relieving the pressure entrapped on the rear surface of the piston (27) through the relief ports (36) by travelling on the extractor rod (35).
In Figure-4, a securing ball chain (37) is illustrated which retains the whole system during the course of all the processes shown in the previous figures. The securing ball chain (37) is mounted by means of the ball chain mounting bolt (38) after mounting the female coupling (3) and it retains its position during the whole
process. Thus, the quick release coupling system (1) is assured to operate always at the same position.
Claims
A quick release coupling (1) which comprises a body (2), a female coupling (3) onto which the male coupling (21) is mounted, seal ring (4) providing sealing of the system, female coupling body (5) constituting the body of the female coupling (3), poppet seal ring (7) providing sealing of the poppet, fluid inlet port (8) through which oil enters the female coupling (3), a poppet groove (10) which helps the fluid pass to the rear side of the piston (27), an external seal ring (14) which avoids fluid leakage to the outer side, a locking ball (15) which allows the male coupling (21) to smoothly detach from the female coupling (3) by engaging the dismounting surface (32) of the ball locking socket (16), a ball locking socket (16) which helps the male coupling (21) to be dismounted from the female coupling (3) by means of balls (15), an external sealing element (17) which prevents the fluid to leak to the outer side, male coupling body (18) constituting the body of the male coupling (21), a male coupling spring (19) which is stiffer than the female coupling poppet spring (22), a male coupling poppet (20) which will not come out and thus the flow cannot be assured if pressure is not trapped on the rear side of the piston (27) since the male coupling spring (19) is stiffer than the female coupling poppet spring (22), a male coupling (21) which can be mounted and dismounted onto- and from the female coupling (3), a female coupling poppet spring (22) which is softer than the male coupling spring (19), an equipment connection point (23) where the fluid arrives by entering through the inlet port (8) and bay passing through the female coupling poppet (6), the female coupling body (5), the male coupling poppet (20) and between the male coupling body (18), a piston rear surface (27) where the pressure is entrapped or relived, seal ring (28) which avoids fluid leakage, seal ring (29) which avoids fluid leakage, shuttle valve seal ring (26), rubber rings (28, 29), a piston (31) which is being pushed by remaining in between the restricted seal ring (30), a
dismounting surface (32) which allows the male coupling (21) to smoothly detach from the female coupling (3), at least one working surface (33), at least one mounting surface (34), a ball chain mounting bolt (38) in order to mount the securing ball chain (37), and which is characterised by incorporating a female coupling poppet (6) which makes the fluid remain in the female coupling (3) even when oil arrives to the female coupling (3) from the inlet line (8) when the female coupling (3) is in the neutral position, namely, when the male coupling (21 ) is not mounted yet, poppet oil passage bore (9) through which the oil passes first after entering first through the fluid inlet port (8) in order to pass to the rear side of the piston, the shuttle valve body groove (1 1) where the fluid enters after it passes through the poppet oil passage bore (9) and exits through the poppet groove, a shuttle valve body oil passage bore (12) through which the oil passes after the shuttle valve body groove (1 1), a shuttle valve orifice oil passage notch (13) through which the oil passes after the shuttle valve body oil passage bore, a shuttle valve ball (24) which interrupts the connection between the poppet side and the rear side of the piston (27) by resting against the shuttle valve seal ring (26), at least one shuttle valve orifice (25), a shuttle valve seal ring (26) against which the shuttle valve ball (24) rests, a restricted seal ring (30) which relieves the pressure entrapped on the rear surface of the piston (27) through the relief ports (36) by travelling on the extractor rod (35), an extractor rod (35) on which the restricted seal ring (30) travels, a pressure relieve port (36) through which pressure is relieved, a securing ball chain (37) which retains the system.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR201207618 | 2012-06-29 | ||
TR2012/07618 | 2012-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014003695A1 true WO2014003695A1 (en) | 2014-01-03 |
Family
ID=48656257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/TR2013/000086 WO2014003695A1 (en) | 2012-06-29 | 2013-02-19 | Quick release coupling |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2014003695A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10156310B2 (en) | 2015-11-18 | 2018-12-18 | Parker-Hannifin Corporation | Non-spill connect under pressure coupler |
CN109990154A (en) * | 2019-04-23 | 2019-07-09 | 苏州速易德工业装备系统有限公司 | A kind of quick coupling of novel belt slide-valve |
CN113926909A (en) * | 2021-10-13 | 2022-01-14 | 长虹美菱股份有限公司 | Pressure relief and pressurization system and method of punching equipment based on rapid die change |
US20220331918A1 (en) * | 2019-09-11 | 2022-10-20 | bavius technologie gmbh | Device for swivelling, turning and changing workpiece pallets on a horizontal machining center, as well as pallet carriers |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4598896A (en) | 1985-08-16 | 1986-07-08 | Imperial Clevite Inc. | Quick disconnect coupling |
US6016835A (en) | 1998-02-23 | 2000-01-25 | Parker-Hannifin Corporation | Hydraulic quick disconnect coupling |
EP2407701A1 (en) * | 2010-07-16 | 2012-01-18 | Faster S.p.A. | Compact cartridge coupling |
-
2013
- 2013-02-19 WO PCT/TR2013/000086 patent/WO2014003695A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4598896A (en) | 1985-08-16 | 1986-07-08 | Imperial Clevite Inc. | Quick disconnect coupling |
US6016835A (en) | 1998-02-23 | 2000-01-25 | Parker-Hannifin Corporation | Hydraulic quick disconnect coupling |
EP2407701A1 (en) * | 2010-07-16 | 2012-01-18 | Faster S.p.A. | Compact cartridge coupling |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10156310B2 (en) | 2015-11-18 | 2018-12-18 | Parker-Hannifin Corporation | Non-spill connect under pressure coupler |
CN109990154A (en) * | 2019-04-23 | 2019-07-09 | 苏州速易德工业装备系统有限公司 | A kind of quick coupling of novel belt slide-valve |
CN109990154B (en) * | 2019-04-23 | 2024-05-14 | 苏州速易德工业装备系统有限公司 | Novel quick connector with sliding valve |
US20220331918A1 (en) * | 2019-09-11 | 2022-10-20 | bavius technologie gmbh | Device for swivelling, turning and changing workpiece pallets on a horizontal machining center, as well as pallet carriers |
CN113926909A (en) * | 2021-10-13 | 2022-01-14 | 长虹美菱股份有限公司 | Pressure relief and pressurization system and method of punching equipment based on rapid die change |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4881573A (en) | Female hydraulic coupler with push-connect and lever disconnect | |
WO2014003695A1 (en) | Quick release coupling | |
US8813782B2 (en) | Hydraulic fitting for pipes | |
US6776187B1 (en) | Quick coupling with pressure assist piston | |
US8684035B2 (en) | Quick connect coupling for connecting hydraulic lines, especially in earth moving machines, and the interchangeable add-on devices and tools thereof | |
CA3115653C (en) | Shaft mechanical lock for pipeline isolation tools | |
US20200231205A1 (en) | Power steering gear assembly having an end of travel valve assembly | |
CA2746100C (en) | Compact cartridge coupling | |
EP2264278B1 (en) | Subsea hydraulic coupler | |
CA1255713A (en) | Power-assisted coupling | |
CN104350287A (en) | Master cylinder | |
US20190368553A1 (en) | Pressure Control Valve | |
CN203517105U (en) | Automatic connection quick-change connector with protection function | |
CN103453255B (en) | A kind of quick release coupling that is certainly dynamically connected with protective function | |
CN102606556A (en) | Automatic volume compensated synchronous flow distribution device | |
US20210071799A1 (en) | Shaft Mechanical Lock for Pipeline Isolation Tools | |
CN203548395U (en) | Plate-type hydraulic balance valve | |
CN104653537A (en) | Lockable reversing valve | |
CN202545406U (en) | Synchronous shunt device with automatic volume compensation function | |
CN111852967A (en) | Hydraulic control one-way valve for coal mine hydraulic support | |
CN204476903U (en) | Locking selector valve | |
CN110005777B (en) | Power steering gear assembly with end-of-stroke valve assembly | |
RU84801U1 (en) | PRESSURE REGULATOR IN THE BRAKE DRIVE | |
CA3217177A1 (en) | Valve coupling assembly | |
KR200483735Y1 (en) | flow control valve assembly for construction machinery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13730075 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 13730075 Country of ref document: EP Kind code of ref document: A1 |