CA1050073A - Coupling device - Google Patents
Coupling deviceInfo
- Publication number
- CA1050073A CA1050073A CA254,884A CA254884A CA1050073A CA 1050073 A CA1050073 A CA 1050073A CA 254884 A CA254884 A CA 254884A CA 1050073 A CA1050073 A CA 1050073A
- Authority
- CA
- Canada
- Prior art keywords
- valve body
- coupling
- casing
- coupling part
- hollow
- 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
- 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
- F16L37/34—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 lift valves being of the sleeve type, i.e. a sleeve is telescoped over an inner cylindrical wall
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
Abstract of the Disclosure A coupling device has two connectable and disconnectable units.
A first unit is provided with a centrally arranged body and an inner casing slidingly arranged between two positions. In a first position, the inner casing cooperates with the central body to keep closed a passage for a fluid medium through the first unit. A second unit has a front section interactable with the inner casing in order to force the casing to a second position against the force of a spring which urges the casing towards the body. In the second position of the casing, the passage for the fluid medium is opened. The second unit also has a valve which closes a passage for the fluid medium when the units are in the disconnected position and opens said passage when the units are in the connected position.
A first unit is provided with a centrally arranged body and an inner casing slidingly arranged between two positions. In a first position, the inner casing cooperates with the central body to keep closed a passage for a fluid medium through the first unit. A second unit has a front section interactable with the inner casing in order to force the casing to a second position against the force of a spring which urges the casing towards the body. In the second position of the casing, the passage for the fluid medium is opened. The second unit also has a valve which closes a passage for the fluid medium when the units are in the disconnected position and opens said passage when the units are in the connected position.
Description
The present invention relates to a coupling device comprising two detachable connectable units, wherein the coupling device is especially suit-able in quick-coupling devices when a system under pressure is to be quickly connected or disconnected. The system may consist of a fluid delivery system to which a fluid-receiving equipment is to be connected. The equipment may consist of working machines, working tools or equivalent.
In the system and the connected equipment, pressure shocks of up to 300 kilopond/cm2 (30 MPa) may appear, and the coupling will function to permit the fluid to flow in bo~h directions through the device. The first unit may constitute the connecting part to the system, whereas the second part constitutes the part assigned to the fluid-receiving equipment.
In the kinds of coupling devices providing for detachable quick connection, there is a pronounced desire to perform the connection and dis-connection of the mentioned equipment to and from the system without any leakage of the fluid. The demands are, to a great extent, determined by environmental aspects which do not allow a fluid in the form of hydraulic fluid, gas, etc., to leak. It is observed that, even if the coupling device in question creates only small amounts of leakage at the time of connection and disconnection to and from the system, a great number of connections and disconnections can cause a considerable amount of leakage out of the system, which in the case when hydraulic oil is the fluid medium, creates unaccept-able pollution problems.
The present invention is designed especially with considerations to these problems in mind and presents a coupling device with a completely leakage-proof connection and disconnection between systems and equipment of the mentioned kind.
A further object of the invention is to make possible an even and effective fluid flow through the units of the coupling device. The device therefore has a structure, with components which do not disturb said fluid flow, which is important in quick-coupling devices used in connection with ~: -1-10,5(J 073 measuring apparatus for high accuracy measuring of static and dynamic pressures, vacuum, etc.
A third object of the invention is to attain a simple structure of the units having cheap components for simplified manufacturing.
A fourth object of the invention is to attain a coupling device in which the connection of the units can be performed by a one-hand-grip.
Briefly described, a first unit of the coupling device has a centrally positioned body, an inner casing slidingly adapted in the axial direction of the first unit between two positions, and spring means cooper-ative with the mentioned casing to attain the first position of the casing in the disconnected position of the units. In said first position, the casing interacts with said body to keep closed a fluid passage through the first and second units. The second unit has a front section interactable with the casing during connection of the units in order to force the casing against the force of the spring to a second position, whereby the medium passage is opened. A valve which is closed in the disconnected position of the units is actuated in the connected position of the units, whereby a medium passage through the second unit is opened when the valve of the second unit is actuated.
In a first embodiment of the invention, the second unit has a front section with an elongated and preferably oblique sealing surface which, via a distinct shoulder, provides a further surface of the second unit positioned below the sealing surface. A seal is then arranged on an end section of the casing that cooperates with the front section of the second unit. The end section of the casing extends beside the front section of the second unit in the second position of the casing, which end section comprises two mutually angled portions, the first of which extends prefer-ably parallel to the front section of the second unit. The second angled portion is directed to the front section of the second unit but extends along only parts of the cross-section of the mentioned seal and adjacent to the further surface of the second unit.
In the system and the connected equipment, pressure shocks of up to 300 kilopond/cm2 (30 MPa) may appear, and the coupling will function to permit the fluid to flow in bo~h directions through the device. The first unit may constitute the connecting part to the system, whereas the second part constitutes the part assigned to the fluid-receiving equipment.
In the kinds of coupling devices providing for detachable quick connection, there is a pronounced desire to perform the connection and dis-connection of the mentioned equipment to and from the system without any leakage of the fluid. The demands are, to a great extent, determined by environmental aspects which do not allow a fluid in the form of hydraulic fluid, gas, etc., to leak. It is observed that, even if the coupling device in question creates only small amounts of leakage at the time of connection and disconnection to and from the system, a great number of connections and disconnections can cause a considerable amount of leakage out of the system, which in the case when hydraulic oil is the fluid medium, creates unaccept-able pollution problems.
The present invention is designed especially with considerations to these problems in mind and presents a coupling device with a completely leakage-proof connection and disconnection between systems and equipment of the mentioned kind.
A further object of the invention is to make possible an even and effective fluid flow through the units of the coupling device. The device therefore has a structure, with components which do not disturb said fluid flow, which is important in quick-coupling devices used in connection with ~: -1-10,5(J 073 measuring apparatus for high accuracy measuring of static and dynamic pressures, vacuum, etc.
A third object of the invention is to attain a simple structure of the units having cheap components for simplified manufacturing.
A fourth object of the invention is to attain a coupling device in which the connection of the units can be performed by a one-hand-grip.
Briefly described, a first unit of the coupling device has a centrally positioned body, an inner casing slidingly adapted in the axial direction of the first unit between two positions, and spring means cooper-ative with the mentioned casing to attain the first position of the casing in the disconnected position of the units. In said first position, the casing interacts with said body to keep closed a fluid passage through the first and second units. The second unit has a front section interactable with the casing during connection of the units in order to force the casing against the force of the spring to a second position, whereby the medium passage is opened. A valve which is closed in the disconnected position of the units is actuated in the connected position of the units, whereby a medium passage through the second unit is opened when the valve of the second unit is actuated.
In a first embodiment of the invention, the second unit has a front section with an elongated and preferably oblique sealing surface which, via a distinct shoulder, provides a further surface of the second unit positioned below the sealing surface. A seal is then arranged on an end section of the casing that cooperates with the front section of the second unit. The end section of the casing extends beside the front section of the second unit in the second position of the casing, which end section comprises two mutually angled portions, the first of which extends prefer-ably parallel to the front section of the second unit. The second angled portion is directed to the front section of the second unit but extends along only parts of the cross-section of the mentioned seal and adjacent to the further surface of the second unit.
-2-105(~073 In a second embodiment of the invention, a first valve is connected to the centrally arranged body which has the shape of a second valve. The first valve cooperates with a first valve seat and the second valve cooper-ates with a second valve seat located on the casing. The first and second valves have the form of tube valves which, at those of their ends which do not face each other, are provided with broadened sealing portions inter-actable with the first and second valve seats, respectively. The first and second valves include through holes in their side walls ~in the goods) adjacent the broadened sealing portions. The through holes are exposed for fluid flow when the casing is positioned in the second position, and the first and second valves are urged to a first axial displacement position by the second unit. The casing is slidably located between the broadened sealing portions of the first and second valves in order to protect sealing means between the casing and the first unit from the main fluid flow which passes inside the first and second valves.
Also, in a third embodiment, a first valve is connected to the centrally arranged body which has the form of a second valve. In a like manner, the first valve cooperates with a first valve seat and the second valve cooperates with a second valve seat situated on the casing. However, the spring of the casing comprises a spring arranged to cause a safe restor-ation of the first and second valves to their first axial displacement position, whereby the fluid passage through the first unit is closed.
In a fourth embodiment, a valve assembly extends within a first coupling unit and is fixedly attached thereto. A spring biases a casing into contact with the valve, with the casing acting to close off the fluid passage through the coupling. A second coupling unit forces the casing to move toward the first coupling unit to open the fluid passage, only after a fluid-tight seal is established between the second unit and the casing.
According to the broadest aspect of the invention, there is provided a coupling device for supplying fluid from a pressurized source to an output ~.~ -3~
i~S0(173 conduit without leakage, said coupling device comprising: a first coupling part having an axial flow passage extending therethrough, a second coupling part having an axial flow passage extending therethrough, said first and second coupling parts each having on a respective first end thereof stopping means to permit detachable coupling of said parts with their respective axial flow passages aligned to permit fluid flow therethrough, a cylindrically-shaped, hollow valve body fixedly supported within and extending from said first coupling part, with said valve body having a plurality of holes extend-ing completely therethrough, collar means supported within said first end portion of said first coupling part and a biasing spring whereby said collar means may be spring biased into a position closing said fluid passage through said coupling device, said collar means forming a fluid-tight connection with said second coupling part prior to movement of said collar means to open said fluid passage through said device as said coupling parts are brought into said coupling relationship, said collar means comprising a hollow casing slidably supported on said hollow valve body, said second coupling part having a second cylindrical valve body which is axially slidingly supported within said second coupling part, said second valve body being formed with an enlarged diameter portion which includes an annular recess supporting an elastic seal-ing ring, said second valve body being abuttingly urged against said hollow valve body, said second valve body being guided for axial slidable motion within said second coupling part, said second valve body having an axially elongated portion in engagement with a hub portion in said second coupling part, and said hub portion being supported in said coupling part by support means which provide a fluid flow passage.
The present invention will now be described in greater detail with reference to the accompanying drawings in which:
Figure 1 is a section in the axial direction of the units of the coupling device; the units being shown in their connected position;
~igure 2 is a section in the axial direction of a valve usable in - 4 ~
1.~50073 the coupling device shown in Figure l;
Figure 3 is a cross-section of the valve shown in Figure 2.
In Figure l a first coupling part or unit forming part of the coupling device is designated l, whereas a second coupling part or unit detachably connectable to the first unit is designated 2. Attached to the first unit are known stopping ~locking) parts which are intended to lock the units to each other in the connected position thereby preventing unin-tentional disconnection. The stopping parts comprise a first stop casing 3 which is slidingly positioned in relation to the first unit between end positions determined by a locking ring 4 and locking ball 5, for which the stop casing 3 has an inner axial groove, thereby allowing the casing 3 to be slidable on the first unit, and a peripherally ring-shaped inner groove allowing the casing to be turned to a stop position ~not shown in the Figure l) in the axial position determined by the locking balls.
The stopping device also comprises a second stop casing 6 which is slidingly positioned in the axial direction of the first unit, and inter-acts with locking balls 7 that interact in turn with unit 2 via grooves in the latter. Between the first and the second stop casings, a helical spring 8 is positioned to separate said casings.
The stopping device has no bearing upon the invention proper except for the one instance evident from the disclosure. Thus, the composition and function of the stopping devices will not be discussed in detail.
The first unit l comprises a first valve 9 in the longitudinal direction of said unit, said first valve 9 being slidingly designed with an enlarged sealing section or portion containing a sealing ring 1OJ and a narrowed section ll designed as a tube. Said tube has through side holes 12 located adjacent the enlarged sec~ion or portion of the valve 9. The side holes in the preferred embodiment, are four in number, with said holes being designed with oblique walls, whereby the axis for each side hole inclines by an angle ~ relative to a line perpendicular to the symmetrical axis of 1.0S0073 units l and 2. The anglec~ is chosen between 15 and 65, preferably 30 , thereby creating an optimal fluid flow.
The enlarged section or portion has both a shoulder 9a, and a flange 9b, the latter to be folded over the sealing ring lO which fixes the position of said ring lO on the valve. The flange 9b is shown in the un-folded position. The first unit 1 also includes a first valve seat portion 13, against which the first valve 9 and its sealing ring 10 rests in the disconnected position of the units l and 2. The seat portion 13 is designed with a shoulder 13a, creating a mechanical stop or "sink limitation"
for the valve 9. In the disconnected position, it is assumed that a fluid works against the enlarged section of the first valve 9, causing said valve to be pressed against the first seat portion 13, thereby closing the out-going passage for fluid flow through the system. The passage is connected to the first unit through tubing or other connecting pipe.
Adjacent to the first seat portion 13 is positioned an inner casing 14 which encloses the narrowed section of the first valve 9 and which moves slidingly between first and second positions in relation to the position of the first seat portion 13 and the first valve 9.
The casing 14 is actuated by means of the front section or parts 15 of the second unit 2, between a fully connected position shown in Figure 1 and identified as the second position, and a disconnected or first position.
A first helical spring 16 biases said casing 14 to said disconnected or first position. In the outer position, the casing 14 is positioned opposite the locking balls 7 of the stopping parts.
The casing 14 is designed with a second valve seat portion 17 for a second valve 18, which, like the first valve, is designed with an enlarged section or por~ion having a sealing ring 19, and a narrowed tubular section with through side holes in said tube adjacent the broadened section of the second valve 18. The second valve 18 has on its enlarged section a shoulder 18a and a foldable flange 18b of equivalent function as the shoulder 9a and ., the flange 9b of the first valve 9. The side holes of the second valve 18 are of equivalent kind and number as the corresponding holes 12 of the first valve 9. The inner casing 14 has a cavitation 17a with a bottom surface which provides a mechanical stop or so called "sink limitation" for the mutual movements of the casing 14 and the second valve 18. The second valve 18 is mechanically connected to the first valve 9 by means of threads formed on the ends of the narrowed parts of the first and second valves.
The narrowed tube-formed part of the first valve 9 is equipped with an outer thread 20 interactable with an inner thread of the narrowed tube-formed part of the second valve 18. Due to the mechanical connection, the move-ment of the second valve 18 is coordinated with the movement of the first valve 9. The resulting protruding end edge of the narrowed section of the second valve forms a stopping edge which is interactable with a blocking edge 13b of the seat portion 13. The interaction between the stopping edge and the blocking edge 13b produces a limit to the displacement of the first and second valves in one direction. Said limit defines a first axial dis-placement position (shown in Figure 1) of the first and second valves with said valves also having a second axial displacement position. (When the first and second units are disconnected).
Figures 2 and 3 show the second valve in a more detailed form. In Figure 2, the inner thread on the second part is designated 18g, and the pro-truding edge 18f. The foldable flange on the enlarged sealing section 18c is designated 18b, while the flange or shoulder in the "sink-limitation-device" is designated 18a. Four holes 18h in the side wall 18d are positioned with the axis 18k of each hole 18h inclining at the angle o~ in relation to a cross-section plane perpendicular to the paper plane of Figure 2. In the section of Figure 3, the axis 18k extends radially with respect to an axial line through said valve 18. However, said holes 18h may be inclined with respect to said axis 18k by forming holes 18h which follow line 18i that is inclined at the angle ~ in relation to said axis 18k. The ~ ~ -7-~50073 main fluid flow through the coupling device passes through the space 18e inside said second valve 18. In the parts of the narrowed section adjacent the outlets (inlets) of the holes, the valve 18 hasaspherical form making possible an even fluid flow.
In the unconnected position of the units 1 and 2, the second seat portion 17 of the casing 14 is pressed against the sealing ring 19 of the enlarged section of the second valve 18 by the spring 16.
The casing 14 is guided by an inner guiding surface or wall 21 of unit 1, which acts as a holder for a sealing ring 22 and provides a sealing relationship between the outer side of the casing 14 and the guiding surface 21 of the unit 1.
The sealing devices 22 consist of a sealing ring 22 between support packing rings 23 of e.g. Acetal, or P.T.F.E. The sealing ring 22 consists of a standard 0-sealing-ring of e.g. Nitril. As an alternative, a conventional sealing of the piston packing type may be used. The casing 14 is equipped with a prolonged outer edge or end section 24 at an end which interacts with the second unit. Edge 24 at its outer end has an inwardly directed flange 25 positioned to form a space for a sealing ring 26. Members 24 and 25 may be described as two angled portions; the first angled portion 24 and the second angled portion 25. Furthermore, the casing has a guiding surface 27 for the narrowed section of ~he second valve 18 with a correspond-ing guiding surface 28 positioned on the first valve seat portion 13 of the narrowed section of the first valve. The casing 14 also has an inner recess 14b directed towards the common axis 45 of the first and second units. In said recess 14b, the spring 16 is positioned between an end wall 14c of the recess 14b and an end wall la of the unit 1. The casing 14 is also provided with a corresponding recess on the outer side of the casing 14 for the sealing means 22, 23.
The second unit 2 is equipped with a front section (nipple) 15a in the form of a casing, and a valve, hereafter called the third valve 29, being designed with both an enlarged section with a sealing ring 30, and a narrowed section. The third valve is actuated by a second spring 31, which urges the third valve to a position wherein it bears against a third seat portion 32, located at the inner surface of the casing-formed outer section 15a. Also, the third valve 29 has a shoulder 29a and a flange 29b to be folded thereover, wherein each part functions in an equivalent manner to the units of the first and second valves 9, 18. In the fully connected position of the units 1 and 2, the third valve 29 is in a position wherein the lower part of the enlarged section of the third valve 29 bears against a stopping surface 33 within the second unit. The enlarged section of the third valve 29 has a smooth end surface 34 interactable with a corresponding smooth end or contact surface 18m of the enlarged section of the second valve 18. Said contact surfaces are ring-shaped as shown in Figure 2.
The front section 15a forms a casing while the third valve 29 of the second unit 2 is designed such that when the second unit 2 in unactuated, the end surface of the third valve is in flush contact with the seat 32 formed in the front section 15a.
The front portion 15, which is formed as a casing of the second unit has an inwardly bent section which, in the connected position of the units 1 and 2, will be essentially parallel with the first angled portion 24 of the casing 14, and which through a slanting sealing surface 15b of its outer side interacts with the sealing ring 26. The sealing surface 15b is elongated and ends in its lower parts having a distinct shoulder 15d. The end surface of the inwardly bent section is interactable with a transversely opposite surface of the casing 14. On the front section 15a of the second unit is arranged a transverse shoulder 15e interactable with an opposite, transverse surface 14a of said casing 14 positioned on the outer side of the inwardly folded second portion 25. Thus, the first portion 24 of the casing 14 and the inwardly bent section of the front part of the second unit are the same length. The second portion 25 has an inner surface 25a c _ 9 _ ~0500'7~
positioned opposite the distinct shoulder 15c when the units 1 and 2 are in the connected position. The distinct shoulder and inner surface form a bottom for the sealing ring 26. The second portion 25, or its inner surface 25a, then extends only along a part of the cross-section of the sealing ring. The second portion and shoulder extend along 15%-90% of the cross-section, preferably 40%-60%, and in the shown embodiment 50%. The front section also has a further surface 15d located adjacent the sealing surface and distinct shoulder. The free end of the second portion 25 is adjacent to said further surface in order to form a small space between the front section of the second unit and the inner casing 14. Because of the structure of the slanting surface 15b, the distinct shoulder 15c and the second portion 25 of the casing the space is in communication with the sealing ring 26, which guarantees an effective sealing function.
The second unit 2 has a centering device 35 for the narrowed section of the third valve 29. The centering device 35 comprises a hub section and spoke-formed parts 36 that are positioned in the longitudinal direction of the second unit; whereby the fluid to be transmitted may pass in the longitudinal direction of the second unit.
In the disconnected position of the units 1 and 2, the first valve 9, according to the above, is actuated against the first seat portion 13 by the pressure of the fluid to be transmitted. The casing 14 is brought to its first position by said first spring 16. In this position, the seat portion 17 of the casing 14 bears against the sealing ring 19 of the second valve 18. The casing 14 is positioned opposite to the locking balls 7;
thereby the stop casing 6 is kept in a blocking position by the locking balls 7, wherein the latter interacts with the groove 37 in the stop casing 6.
This feature facilitates the connection of the units 1 and 2 of the coupling device. In the second unit, the third valve 29, is actuated by a second spring 31 to interact with the third seat portion 32. Thus, the position of the valves blocks the fluid pressure via the incoming passage 38, from being ~050073 efficiently transmitted past the first and second valves, with the casing 14 sealing the through side holes of the narrowed section of the second valve 18. The outgoing passage 40 of the second unit 2 is sealed by means of the third valve 29. The springs 16 and 31 are chosen so as to achieve a proper seal against the prevailing pressure present when the units are in the dis-connected position.
In the above described embodiment, the first spring 16 consists of a helical spring of 15,0 mm diameter, the wire 1,3 mm and length in unactuat-ed condition 35,0 mm. Corresponding dimensions of the second spring 31, which is also designed as a helical spring, are; diameter 5 mm, wire diameter 1,0 mm, and length in unactuated condition 30 mm. The springs are construct-ed of conventional spring material. The sealing rings referred to may be made of Nitril, Viton, etc. The coupling has a total length of about 90 mm and the diameter of the first unit is about 30 mm. The shown coupling is intended to achieve a leak-proof detachable connection for a system under pressure. The connection and disconnection itself are performed according to the above at low pressure, even if the pressure of the system and the connected equipment momentarily may reach 300 kilopond/cm (30 MPa). By adding a known pressure liminator (not shown) the present coupling device may simply be positioned for connection even in cases of high pressures.
Due to the design of the above described parts, the assembly of the coupling device itself is simple and economical. As to the assembly of the first unit 1, the first spring 16 and the casing 14 are first brought into position in the ring formed cavitation in the first unit. After that, the valve 9 is brought in from one end of the unit, while the valve 18 is brought from the other end of the unit, with the mentioned valves being screwed together. During assembly of the second unit the valve is brought in via that end of the second unit which is opposite from the first unit, and after that, the centering parts 35, 36 are brought into the second unit via the same end and locked by a locking ring 44.
! ` -11-The operation of the valves following connection of parts 1 and 2 depends on the pressure conditions at the connections 38 and 40. Presuming, that the pressure is highest at 38, the second and third valves will be opened first, and the first valve 9 last, this order being due to the inter-action between the casing 14 and the front sections 15 of the second unit, and the contact between the second and third valves via their smooth end surfaces. If the pressure is higher at the connection 40 than at 38, the first valve 9 will be opened first and after that the third and second valves 18 and 29, respectively.
Due to the design of the front section 15a of the second unit 2, and the design and location of the sealing ring 26, a safe seal is achieved before any of the three valves are actuated from their sealing positions;
this being important for establishment of a leak-proof connection.
Following the opening of all the valves, a through passage is created, which in the case when the pressure at 38 is higher than that at 40, runs as is shown by the continuous arrow 41. If the pressure is higher at 40, the arrow will face the opposite direction. The passage, according to the arrow 41, runs through space 42 at the side of the broad section of the first valve, through the side holes 12 of the narrowed section of the first valve, within the narrow section, through the narrow section of the second valve, through the side holes in the narrow section of the second valve, through a space 43 at the side of the enlarged sections of the second and third valves, and finally between the spoke-formed parts 36 in the second unit. None of the fluid can leak during the connection of the coupling due to first valve 9 heing lifted last from its seat, with a leak-proof being made by means of the sealing rings 22 and 26.
During the disconnection of the units 1 and 2, the second valve 18 is first actuated against its seat 17 of the casing 14; after which the third valve is closed against the seat 32. Finally, the first valve 9 moves towards its seat part 13. The disconnection from the fully connected ~050073 position is preceded by manual actuations on the stop casings 3 and 6, during which, an axial displacement of the stop casing 6 takes place, with the groove 37 in said stop casing 6 being positioned opposite to the locking balls 7, which then can be pressed out into the groove to provide manual disconnection of the units. It is observed that if, in the connected position of the units 1 and 2, the pressure of the system is high (for instance up to 300 kilopond/cm or 30 MPa), there will be no separation of the units be-cause of the force which presses the locking balls 7 against both the smooth surface of the stop casing 6 and the slanting front wall of the groove of the unit 2. The force prevents a longitudinal displacement of the stop casing 6. Thus, the quick-connect coupling allows disconnection at only low pressures, when forces on the locking balls can be overcome by manual power on the stop casing 6. In the case of a high pressure, a reduction of the pressure in the system must first take place, as by means of a cut-off valve or similar. Due to the fact that the second and third valves 18, 29 interact by their smooth end surfaces, oil leakage is eliminated with the shown construction.
The interaction between the shoulder 13b of the first seat portion and the protruding end surface of the narrowed section of the second valve 18 results in the required flow areas being achieved simultaneously with the completion of the movements of the second valve 18 in one direction.
The invention is not restricted to the above described exemplary embodiment, but may be subjected to modifications within the scope of the following claims. For instance in the above described embodiment the body is assumed to be in the form of a slidingly arranged second valve connected with the first valve. However, the invention is also intended to cover embodiments having a fixed body, implying that ~he first valve is dispensed with. In principle the recesses of spring 16 and the sealing means 22, 23 can change positions.
Also, in a third embodiment, a first valve is connected to the centrally arranged body which has the form of a second valve. In a like manner, the first valve cooperates with a first valve seat and the second valve cooperates with a second valve seat situated on the casing. However, the spring of the casing comprises a spring arranged to cause a safe restor-ation of the first and second valves to their first axial displacement position, whereby the fluid passage through the first unit is closed.
In a fourth embodiment, a valve assembly extends within a first coupling unit and is fixedly attached thereto. A spring biases a casing into contact with the valve, with the casing acting to close off the fluid passage through the coupling. A second coupling unit forces the casing to move toward the first coupling unit to open the fluid passage, only after a fluid-tight seal is established between the second unit and the casing.
According to the broadest aspect of the invention, there is provided a coupling device for supplying fluid from a pressurized source to an output ~.~ -3~
i~S0(173 conduit without leakage, said coupling device comprising: a first coupling part having an axial flow passage extending therethrough, a second coupling part having an axial flow passage extending therethrough, said first and second coupling parts each having on a respective first end thereof stopping means to permit detachable coupling of said parts with their respective axial flow passages aligned to permit fluid flow therethrough, a cylindrically-shaped, hollow valve body fixedly supported within and extending from said first coupling part, with said valve body having a plurality of holes extend-ing completely therethrough, collar means supported within said first end portion of said first coupling part and a biasing spring whereby said collar means may be spring biased into a position closing said fluid passage through said coupling device, said collar means forming a fluid-tight connection with said second coupling part prior to movement of said collar means to open said fluid passage through said device as said coupling parts are brought into said coupling relationship, said collar means comprising a hollow casing slidably supported on said hollow valve body, said second coupling part having a second cylindrical valve body which is axially slidingly supported within said second coupling part, said second valve body being formed with an enlarged diameter portion which includes an annular recess supporting an elastic seal-ing ring, said second valve body being abuttingly urged against said hollow valve body, said second valve body being guided for axial slidable motion within said second coupling part, said second valve body having an axially elongated portion in engagement with a hub portion in said second coupling part, and said hub portion being supported in said coupling part by support means which provide a fluid flow passage.
The present invention will now be described in greater detail with reference to the accompanying drawings in which:
Figure 1 is a section in the axial direction of the units of the coupling device; the units being shown in their connected position;
~igure 2 is a section in the axial direction of a valve usable in - 4 ~
1.~50073 the coupling device shown in Figure l;
Figure 3 is a cross-section of the valve shown in Figure 2.
In Figure l a first coupling part or unit forming part of the coupling device is designated l, whereas a second coupling part or unit detachably connectable to the first unit is designated 2. Attached to the first unit are known stopping ~locking) parts which are intended to lock the units to each other in the connected position thereby preventing unin-tentional disconnection. The stopping parts comprise a first stop casing 3 which is slidingly positioned in relation to the first unit between end positions determined by a locking ring 4 and locking ball 5, for which the stop casing 3 has an inner axial groove, thereby allowing the casing 3 to be slidable on the first unit, and a peripherally ring-shaped inner groove allowing the casing to be turned to a stop position ~not shown in the Figure l) in the axial position determined by the locking balls.
The stopping device also comprises a second stop casing 6 which is slidingly positioned in the axial direction of the first unit, and inter-acts with locking balls 7 that interact in turn with unit 2 via grooves in the latter. Between the first and the second stop casings, a helical spring 8 is positioned to separate said casings.
The stopping device has no bearing upon the invention proper except for the one instance evident from the disclosure. Thus, the composition and function of the stopping devices will not be discussed in detail.
The first unit l comprises a first valve 9 in the longitudinal direction of said unit, said first valve 9 being slidingly designed with an enlarged sealing section or portion containing a sealing ring 1OJ and a narrowed section ll designed as a tube. Said tube has through side holes 12 located adjacent the enlarged sec~ion or portion of the valve 9. The side holes in the preferred embodiment, are four in number, with said holes being designed with oblique walls, whereby the axis for each side hole inclines by an angle ~ relative to a line perpendicular to the symmetrical axis of 1.0S0073 units l and 2. The anglec~ is chosen between 15 and 65, preferably 30 , thereby creating an optimal fluid flow.
The enlarged section or portion has both a shoulder 9a, and a flange 9b, the latter to be folded over the sealing ring lO which fixes the position of said ring lO on the valve. The flange 9b is shown in the un-folded position. The first unit 1 also includes a first valve seat portion 13, against which the first valve 9 and its sealing ring 10 rests in the disconnected position of the units l and 2. The seat portion 13 is designed with a shoulder 13a, creating a mechanical stop or "sink limitation"
for the valve 9. In the disconnected position, it is assumed that a fluid works against the enlarged section of the first valve 9, causing said valve to be pressed against the first seat portion 13, thereby closing the out-going passage for fluid flow through the system. The passage is connected to the first unit through tubing or other connecting pipe.
Adjacent to the first seat portion 13 is positioned an inner casing 14 which encloses the narrowed section of the first valve 9 and which moves slidingly between first and second positions in relation to the position of the first seat portion 13 and the first valve 9.
The casing 14 is actuated by means of the front section or parts 15 of the second unit 2, between a fully connected position shown in Figure 1 and identified as the second position, and a disconnected or first position.
A first helical spring 16 biases said casing 14 to said disconnected or first position. In the outer position, the casing 14 is positioned opposite the locking balls 7 of the stopping parts.
The casing 14 is designed with a second valve seat portion 17 for a second valve 18, which, like the first valve, is designed with an enlarged section or por~ion having a sealing ring 19, and a narrowed tubular section with through side holes in said tube adjacent the broadened section of the second valve 18. The second valve 18 has on its enlarged section a shoulder 18a and a foldable flange 18b of equivalent function as the shoulder 9a and ., the flange 9b of the first valve 9. The side holes of the second valve 18 are of equivalent kind and number as the corresponding holes 12 of the first valve 9. The inner casing 14 has a cavitation 17a with a bottom surface which provides a mechanical stop or so called "sink limitation" for the mutual movements of the casing 14 and the second valve 18. The second valve 18 is mechanically connected to the first valve 9 by means of threads formed on the ends of the narrowed parts of the first and second valves.
The narrowed tube-formed part of the first valve 9 is equipped with an outer thread 20 interactable with an inner thread of the narrowed tube-formed part of the second valve 18. Due to the mechanical connection, the move-ment of the second valve 18 is coordinated with the movement of the first valve 9. The resulting protruding end edge of the narrowed section of the second valve forms a stopping edge which is interactable with a blocking edge 13b of the seat portion 13. The interaction between the stopping edge and the blocking edge 13b produces a limit to the displacement of the first and second valves in one direction. Said limit defines a first axial dis-placement position (shown in Figure 1) of the first and second valves with said valves also having a second axial displacement position. (When the first and second units are disconnected).
Figures 2 and 3 show the second valve in a more detailed form. In Figure 2, the inner thread on the second part is designated 18g, and the pro-truding edge 18f. The foldable flange on the enlarged sealing section 18c is designated 18b, while the flange or shoulder in the "sink-limitation-device" is designated 18a. Four holes 18h in the side wall 18d are positioned with the axis 18k of each hole 18h inclining at the angle o~ in relation to a cross-section plane perpendicular to the paper plane of Figure 2. In the section of Figure 3, the axis 18k extends radially with respect to an axial line through said valve 18. However, said holes 18h may be inclined with respect to said axis 18k by forming holes 18h which follow line 18i that is inclined at the angle ~ in relation to said axis 18k. The ~ ~ -7-~50073 main fluid flow through the coupling device passes through the space 18e inside said second valve 18. In the parts of the narrowed section adjacent the outlets (inlets) of the holes, the valve 18 hasaspherical form making possible an even fluid flow.
In the unconnected position of the units 1 and 2, the second seat portion 17 of the casing 14 is pressed against the sealing ring 19 of the enlarged section of the second valve 18 by the spring 16.
The casing 14 is guided by an inner guiding surface or wall 21 of unit 1, which acts as a holder for a sealing ring 22 and provides a sealing relationship between the outer side of the casing 14 and the guiding surface 21 of the unit 1.
The sealing devices 22 consist of a sealing ring 22 between support packing rings 23 of e.g. Acetal, or P.T.F.E. The sealing ring 22 consists of a standard 0-sealing-ring of e.g. Nitril. As an alternative, a conventional sealing of the piston packing type may be used. The casing 14 is equipped with a prolonged outer edge or end section 24 at an end which interacts with the second unit. Edge 24 at its outer end has an inwardly directed flange 25 positioned to form a space for a sealing ring 26. Members 24 and 25 may be described as two angled portions; the first angled portion 24 and the second angled portion 25. Furthermore, the casing has a guiding surface 27 for the narrowed section of ~he second valve 18 with a correspond-ing guiding surface 28 positioned on the first valve seat portion 13 of the narrowed section of the first valve. The casing 14 also has an inner recess 14b directed towards the common axis 45 of the first and second units. In said recess 14b, the spring 16 is positioned between an end wall 14c of the recess 14b and an end wall la of the unit 1. The casing 14 is also provided with a corresponding recess on the outer side of the casing 14 for the sealing means 22, 23.
The second unit 2 is equipped with a front section (nipple) 15a in the form of a casing, and a valve, hereafter called the third valve 29, being designed with both an enlarged section with a sealing ring 30, and a narrowed section. The third valve is actuated by a second spring 31, which urges the third valve to a position wherein it bears against a third seat portion 32, located at the inner surface of the casing-formed outer section 15a. Also, the third valve 29 has a shoulder 29a and a flange 29b to be folded thereover, wherein each part functions in an equivalent manner to the units of the first and second valves 9, 18. In the fully connected position of the units 1 and 2, the third valve 29 is in a position wherein the lower part of the enlarged section of the third valve 29 bears against a stopping surface 33 within the second unit. The enlarged section of the third valve 29 has a smooth end surface 34 interactable with a corresponding smooth end or contact surface 18m of the enlarged section of the second valve 18. Said contact surfaces are ring-shaped as shown in Figure 2.
The front section 15a forms a casing while the third valve 29 of the second unit 2 is designed such that when the second unit 2 in unactuated, the end surface of the third valve is in flush contact with the seat 32 formed in the front section 15a.
The front portion 15, which is formed as a casing of the second unit has an inwardly bent section which, in the connected position of the units 1 and 2, will be essentially parallel with the first angled portion 24 of the casing 14, and which through a slanting sealing surface 15b of its outer side interacts with the sealing ring 26. The sealing surface 15b is elongated and ends in its lower parts having a distinct shoulder 15d. The end surface of the inwardly bent section is interactable with a transversely opposite surface of the casing 14. On the front section 15a of the second unit is arranged a transverse shoulder 15e interactable with an opposite, transverse surface 14a of said casing 14 positioned on the outer side of the inwardly folded second portion 25. Thus, the first portion 24 of the casing 14 and the inwardly bent section of the front part of the second unit are the same length. The second portion 25 has an inner surface 25a c _ 9 _ ~0500'7~
positioned opposite the distinct shoulder 15c when the units 1 and 2 are in the connected position. The distinct shoulder and inner surface form a bottom for the sealing ring 26. The second portion 25, or its inner surface 25a, then extends only along a part of the cross-section of the sealing ring. The second portion and shoulder extend along 15%-90% of the cross-section, preferably 40%-60%, and in the shown embodiment 50%. The front section also has a further surface 15d located adjacent the sealing surface and distinct shoulder. The free end of the second portion 25 is adjacent to said further surface in order to form a small space between the front section of the second unit and the inner casing 14. Because of the structure of the slanting surface 15b, the distinct shoulder 15c and the second portion 25 of the casing the space is in communication with the sealing ring 26, which guarantees an effective sealing function.
The second unit 2 has a centering device 35 for the narrowed section of the third valve 29. The centering device 35 comprises a hub section and spoke-formed parts 36 that are positioned in the longitudinal direction of the second unit; whereby the fluid to be transmitted may pass in the longitudinal direction of the second unit.
In the disconnected position of the units 1 and 2, the first valve 9, according to the above, is actuated against the first seat portion 13 by the pressure of the fluid to be transmitted. The casing 14 is brought to its first position by said first spring 16. In this position, the seat portion 17 of the casing 14 bears against the sealing ring 19 of the second valve 18. The casing 14 is positioned opposite to the locking balls 7;
thereby the stop casing 6 is kept in a blocking position by the locking balls 7, wherein the latter interacts with the groove 37 in the stop casing 6.
This feature facilitates the connection of the units 1 and 2 of the coupling device. In the second unit, the third valve 29, is actuated by a second spring 31 to interact with the third seat portion 32. Thus, the position of the valves blocks the fluid pressure via the incoming passage 38, from being ~050073 efficiently transmitted past the first and second valves, with the casing 14 sealing the through side holes of the narrowed section of the second valve 18. The outgoing passage 40 of the second unit 2 is sealed by means of the third valve 29. The springs 16 and 31 are chosen so as to achieve a proper seal against the prevailing pressure present when the units are in the dis-connected position.
In the above described embodiment, the first spring 16 consists of a helical spring of 15,0 mm diameter, the wire 1,3 mm and length in unactuat-ed condition 35,0 mm. Corresponding dimensions of the second spring 31, which is also designed as a helical spring, are; diameter 5 mm, wire diameter 1,0 mm, and length in unactuated condition 30 mm. The springs are construct-ed of conventional spring material. The sealing rings referred to may be made of Nitril, Viton, etc. The coupling has a total length of about 90 mm and the diameter of the first unit is about 30 mm. The shown coupling is intended to achieve a leak-proof detachable connection for a system under pressure. The connection and disconnection itself are performed according to the above at low pressure, even if the pressure of the system and the connected equipment momentarily may reach 300 kilopond/cm (30 MPa). By adding a known pressure liminator (not shown) the present coupling device may simply be positioned for connection even in cases of high pressures.
Due to the design of the above described parts, the assembly of the coupling device itself is simple and economical. As to the assembly of the first unit 1, the first spring 16 and the casing 14 are first brought into position in the ring formed cavitation in the first unit. After that, the valve 9 is brought in from one end of the unit, while the valve 18 is brought from the other end of the unit, with the mentioned valves being screwed together. During assembly of the second unit the valve is brought in via that end of the second unit which is opposite from the first unit, and after that, the centering parts 35, 36 are brought into the second unit via the same end and locked by a locking ring 44.
! ` -11-The operation of the valves following connection of parts 1 and 2 depends on the pressure conditions at the connections 38 and 40. Presuming, that the pressure is highest at 38, the second and third valves will be opened first, and the first valve 9 last, this order being due to the inter-action between the casing 14 and the front sections 15 of the second unit, and the contact between the second and third valves via their smooth end surfaces. If the pressure is higher at the connection 40 than at 38, the first valve 9 will be opened first and after that the third and second valves 18 and 29, respectively.
Due to the design of the front section 15a of the second unit 2, and the design and location of the sealing ring 26, a safe seal is achieved before any of the three valves are actuated from their sealing positions;
this being important for establishment of a leak-proof connection.
Following the opening of all the valves, a through passage is created, which in the case when the pressure at 38 is higher than that at 40, runs as is shown by the continuous arrow 41. If the pressure is higher at 40, the arrow will face the opposite direction. The passage, according to the arrow 41, runs through space 42 at the side of the broad section of the first valve, through the side holes 12 of the narrowed section of the first valve, within the narrow section, through the narrow section of the second valve, through the side holes in the narrow section of the second valve, through a space 43 at the side of the enlarged sections of the second and third valves, and finally between the spoke-formed parts 36 in the second unit. None of the fluid can leak during the connection of the coupling due to first valve 9 heing lifted last from its seat, with a leak-proof being made by means of the sealing rings 22 and 26.
During the disconnection of the units 1 and 2, the second valve 18 is first actuated against its seat 17 of the casing 14; after which the third valve is closed against the seat 32. Finally, the first valve 9 moves towards its seat part 13. The disconnection from the fully connected ~050073 position is preceded by manual actuations on the stop casings 3 and 6, during which, an axial displacement of the stop casing 6 takes place, with the groove 37 in said stop casing 6 being positioned opposite to the locking balls 7, which then can be pressed out into the groove to provide manual disconnection of the units. It is observed that if, in the connected position of the units 1 and 2, the pressure of the system is high (for instance up to 300 kilopond/cm or 30 MPa), there will be no separation of the units be-cause of the force which presses the locking balls 7 against both the smooth surface of the stop casing 6 and the slanting front wall of the groove of the unit 2. The force prevents a longitudinal displacement of the stop casing 6. Thus, the quick-connect coupling allows disconnection at only low pressures, when forces on the locking balls can be overcome by manual power on the stop casing 6. In the case of a high pressure, a reduction of the pressure in the system must first take place, as by means of a cut-off valve or similar. Due to the fact that the second and third valves 18, 29 interact by their smooth end surfaces, oil leakage is eliminated with the shown construction.
The interaction between the shoulder 13b of the first seat portion and the protruding end surface of the narrowed section of the second valve 18 results in the required flow areas being achieved simultaneously with the completion of the movements of the second valve 18 in one direction.
The invention is not restricted to the above described exemplary embodiment, but may be subjected to modifications within the scope of the following claims. For instance in the above described embodiment the body is assumed to be in the form of a slidingly arranged second valve connected with the first valve. However, the invention is also intended to cover embodiments having a fixed body, implying that ~he first valve is dispensed with. In principle the recesses of spring 16 and the sealing means 22, 23 can change positions.
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A coupling device for supplying fluid from a pressured source to an output conduit without leakage, said coupling device comprising: a first coupling part having an axial flow passage extending therethrough, a second coupling part having an axial flow passage extending therethrough, said first and second coupling parts each having on a respective first end thereof stopping means to permit detachable coupling of said parts with their respec-tive axial flow passages aligned to permit fluid flow therethrough, a cylin-drically-shaped, hollow valve body fixedly supported within and extending from said first coupling part, with said valve body having a plurality of holes extending completely therethrough, collar means supported within said first end portion of said first coupling part and a biasing spring whereby said collar means may be spring biased into a position closing said fluid passage through said coupling device, said collar means forming a fluid-tight connection with said second coupling part prior to movement of said collar means to open said fluid passage through said device as said coupling parts are brought into said coupling relationship, said collar means comprising a hollow casing slidably supported on said hollow valve body, said second coupling part having a second cylindrical valve body which is axially slidingly supported within said second coupling part, said second valve body being formed with an enlarged diameter portion which includes an annular recess supporting an elastic sealing ring, said second valve body being abuttingly urged against said hollow valve body, said second valve body being guided for axial slidable motion within said second coupling part, said second valve body having an axially elongated portion in engagement with a hub portion in said second coupling part, and said hub portion being supported in said coupling part by support means which provide a fluid flow passage.
2. A coupling device according to claim 1, wherein said hollow valve body includes an end portion of enlarged diameter engagable with said collar means to form a seal which prevents fluid flow through said coupling parts.
3. A coupling device according to claim 2, wherein said enlarged diam-eter portion of said hollow valve body has a recess formed therein to support an elastic ring which effects sealing engagement with said collar means, said enlarged diameter further including an annular protuberance positioned adjacent said recess with said protuberance extending radially beyond said annular shoulder and providing increased contact area between said hollow valve body and said elastic ring.
4. A coupling device according to claim 2, wherein said holes formed in said hollow valve body include sharp edges and concave surfaces inclined at an angle to an axis extending perpendicularly through said hollow valve body to effectively direct the fluid flow through said valve body.
5. A coupling device according to claim 1, wherein said biasing spring is compressed between said first coupling part and said hollow casing, with said spring expanding to slidably move said hollow casing into abutting con-tact with an end portion of said hollow valve body to close said fluid passage through said coupling device.
6. A coupling device according to claim 5, wherein said second coupling part abuts and moves said axially elongated portion into abuttment with said hollow casing during engagement of said coupling members, with said second coupling part moving said cylindrically-shaped hollow valve body into abutting contact with said first coupling part to open said fluid passage through said device.
7. A coupling device according to claim 1, wherein said hollow casing supports an elastic ring which sealingly contacts said casing prior to said second coupling part effecting movement of said hollow casing, forming a fluid-tight seal between said second coupling part and said hollow casing before a fluid passage is completed through said coupling device.
8. A coupling device as set forth in claim 1 wherein the hollow valve body is slidably axially supported within a mating bore in the first coupling part, said hollow valve body having two end portions of enlarged diameter engageable with a seat formed at one end of said bore and with a seat formed on the hollow casing, respectively.
9. A coupling device as set forth in claim 8 wherein said hollow valve body comprises two threadably interconnected hollow cylindrical sections with one of said two enlarged diameter portions being formed on each section, said hollow sections being formed with said plurality of holes therethrough and with said holes being positioned between said enlarged diameter portions to provide an axial passage through said valve body when said enlarged diameter portions are separated from their respective seats.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7506846A SE399316B (en) | 1975-06-16 | 1975-06-16 | CONNECTION DEVICE INCLUDING TWO FALLABLE AND INSERTABLE DEVICES |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1050073A true CA1050073A (en) | 1979-03-06 |
Family
ID=20324871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA254,884A Expired CA1050073A (en) | 1975-06-16 | 1976-06-15 | Coupling device |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5260430A (en) |
| AU (1) | AU503402B2 (en) |
| CA (1) | CA1050073A (en) |
| DE (1) | DE2626668C2 (en) |
| FI (1) | FI67134C (en) |
| FR (1) | FR2315053A1 (en) |
| GB (1) | GB1543747A (en) |
| SE (1) | SE399316B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3023377A1 (en) * | 1980-06-23 | 1982-01-14 | Carl Kurt Walther Gmbh & Co Kg, 5600 Wuppertal | Quick action closure coupling for fluid lines - has spring loaded bush controlling locking ball set and pushed back on plug insertion |
| JPS59186586U (en) * | 1983-05-31 | 1984-12-11 | 株式会社ターダ | pipe fittings |
| SE447157B (en) * | 1985-03-13 | 1986-10-27 | Thure Ekman | COUPLING |
| CH672363A5 (en) * | 1986-09-29 | 1989-11-15 | Contempo Products | |
| US4786029A (en) * | 1987-11-09 | 1988-11-22 | Aeroquip Corporation | Connect-against-pressure coupling |
| US4892117A (en) * | 1988-11-10 | 1990-01-09 | Aeroquip Corporation | Refrigeration coupling |
| DE4035453C2 (en) * | 1990-11-08 | 1993-10-07 | Faster Srl | Quick-release coupling for hydraulic brake systems, in particular trailer couplings |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1250698B (en) * | 1967-09-21 | |||
| US2689138A (en) * | 1949-06-18 | 1954-09-14 | Albert T Scheiwer | Coupling |
| US3052261A (en) * | 1959-01-15 | 1962-09-04 | Nyberg Carl Erik Josef | Fluid coupling |
| AT295261B (en) * | 1965-09-15 | 1971-12-27 | Thure Ekman | Line coupling with valve for compressed air, liquid or the like. |
-
1975
- 1975-06-16 SE SE7506846A patent/SE399316B/en not_active IP Right Cessation
-
1976
- 1976-06-02 AU AU14532/76A patent/AU503402B2/en not_active Expired
- 1976-06-08 GB GB2367476A patent/GB1543747A/en not_active Expired
- 1976-06-15 CA CA254,884A patent/CA1050073A/en not_active Expired
- 1976-06-15 DE DE19762626668 patent/DE2626668C2/en not_active Expired
- 1976-06-15 FI FI761725A patent/FI67134C/en not_active IP Right Cessation
- 1976-06-15 FR FR7618161A patent/FR2315053A1/en active Granted
- 1976-06-16 JP JP51072129A patent/JPS5260430A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2315053A1 (en) | 1977-01-14 |
| FI67134B (en) | 1984-09-28 |
| JPS6128873B2 (en) | 1986-07-03 |
| FI761725A (en) | 1976-12-17 |
| AU1453276A (en) | 1977-12-08 |
| FR2315053B1 (en) | 1982-04-23 |
| FI67134C (en) | 1985-01-10 |
| DE2626668A1 (en) | 1976-12-30 |
| SE399316B (en) | 1978-02-06 |
| SE7506846L (en) | 1976-12-17 |
| GB1543747A (en) | 1979-04-04 |
| JPS5260430A (en) | 1977-05-18 |
| DE2626668C2 (en) | 1986-11-27 |
| AU503402B2 (en) | 1979-09-06 |
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