JPH0524397B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates generally to couplings, and more particularly to couplings for hoses and similar conduits. More particularly, the invention relates to an improvement in a coupling that can be used in sealingly connecting the end portion of a hose to a nipple, for example to a nipple under the hood of a motor vehicle.

It is known to couple a hose and a nipple by means of an annular sealing device which is forced into the nipple so that the gas or hydraulic fluid to be transferred does not leak out uncontrolled. Also,
It is also known to connect the ends of hoses by means of a tubular connector surrounded by a sealing device and connectable separately to the nipple by one or more flexible hooks integral with the ring. The ring is disposed around and held in frictional engagement with the outer surface of the tubular connector. The end of the hose slides into the back of the connector after the ring, and the front of the connector has a circumferential groove for the O-ring, which forms a sealing device, so that after it has been pushed into the nipple, the hook is attached to the side on the outside of the nipple. mesh together. The outer diameter of the front of the connector matches or nearly matches the inner diameter of the nipple. Furthermore, the outer diameter of the nipple is provided with a generally wedge-shaped cam which can disengage the hook from the flank following mutual rotation of the nipple and the end of the hose. The connector can be pulled away from the nipple.

The disadvantages of the couplings described above are their complexity, length, bulk, and high cost. Additionally, significant force is required to insert the O-ring into the nipple. Furthermore, because the end of the hose is simply slipped into the back of the connector, the seal between the hose and the connector may rupture when the pressure inside the hose and/or nipple increases. In practice, the hose may separate completely from the connector. Such separation can also occur when a strong pull is applied to the end of the hose away from the nipple that receives the front of the connector. The frictional engagement between the hook-retaining ring and the connector is sufficient to prevent the ring and connector from separating from each other as the connector is pulled away from the nipple and/or vice versa. There are many things that cannot be done.

OBJECTS AND SUMMARY OF THE INVENTION The object of the invention is to provide a coupling used for connecting two conduits conducting fluid, such as hoses, comprising:
It is easy to attach and detach, and the fluid does not leak from the connecting portion of the coupling ring and the conduit in the connected state, and even when a force is applied to the coupling ring and the conduit to separate them from each other,
The purpose is to provide a reliable coupling that reliably maintains the connection.

Another object of the invention is to
To provide a hose coupling which does not leak a trapped liquid medium when a tension is applied in a direction to separate a conduit from a nipple such as a second conduit.

Another object of this invention is to provide a new and improved method of separately coupling a flexible hose end to a nipple.

Another object of the invention is to provide a device, machine or mechanism implementing the above-described coupling.

Another object of this invention is to provide a new and improved means for joining the end of a plastic hose to a metal or plastic nipple or the like.

Another object of the invention is to provide a new and improved connector that can be used in the couplings described above.

Another object of the invention is to provide a sufficient seal between conduits which are short, consist of a small number of simple and economical parts, and are used to convey high, medium or low pressure gaseous liquids or hydraulic fluids. It is an object of the present invention to provide a coupling that can be used effectively to obtain the desired results and that can withstand strong axial stress.

Yet another object of the invention is to provide a new and improved connection between a tubular member and a hose that individually contacts a nipple or the like.

Yet another object of the invention is to provide a coupling in which the attachment of the end of a hose or other conduit to a nipple or the like requires relatively little force in the axial direction of the nipple.

The coupling of the present invention is for use with a first conduit including a deformable first end having an outer surface and a second conduit having a second end having an outward projection, the coupling comprising: a tubular connector comprising a first section extending to a second terminal end and a second section having an inner surface formed to surround the outer surface of the first terminal end; at least one resilient pallet releasably engaging the outer projection to retain the first section against withdrawal from the second end; and retaining the outer surface in engagement with the inner surface. biasing means for biasing said first end so as to cause said biasing means to include deformable resilient prongs and a ring of slots alternating with said prongs; a protrusion that deformably engages with the first terminal end;
is surrounded by the first terminal end when the outer surface of the terminal end is surrounded by the inner surface, and the biasing means is further surrounded by the ring and extends the prong against the first terminal end. It is characterized by having a ring formed to press against it.

Furthermore, the coupling preferably comprises annular sealing means arranged between the terminal end and the first section.

The biasing means comprises a radially expandable sleeve confined in a radially expanded state to the first end.

The sealing means may be arranged in an annular space defined by the first section of the tubular connector and the second conduit.

The pallet is preferably integral with the second section of the tubular connector.

The first section of the connector can be rigidly secured to the terminal end of the first conduit.

The terminal end of the first conduit is preferably glued to the first section of the connector.

To this end, the end of the first conduit and the first section of the connector preferably consist of or include a thermoplastic material so that they can be bonded to each other by application of heat.

As a variant, the first section of the connector can be secured to the terminal end of the first conduit by means of a suitable adhesive.

In all embodiments of the coupling of the invention,
A terminal end of the first conduit is receivable in a radially compressed condition in a second section of the connector.

The pallet is preferably integral with the terminal end of the second section of the connector remote from the first section of the connector.

The pallet may have an arcuate rear end integral with the terminal end of the second section of the connector, and a second portion preferably elongated and extending substantially parallel to the axis of the connector; It also has a terminal end with a protrusion (eg, a radially inwardly extending tooth) that engages a protrusion on the terminal end of the second conduit.

The rear end of the second section of the connector may define an annular flange extending radially outwardly from the terminal end of the first conduit, and the rear end of the pallet preferably comprises: It is arcuate and gradually recesses into the flange of the second section of the connector.

The width of the pallet (measured in the circumferential direction of the connector) is preferably the same as the width of the second pallet of the connector.
from the first section to the first section, thereby increasing the flexibility of the intermediate portion of the pallet.

The intermediate portion of the pallet preferably decreases in thickness from the rear end towards the second conduit when measured in the radial direction of the connector. The direction of the taper is towards the protrusion at the terminal end of the second conduit.

In the undeformed state of the first conduit, the first
The outer diameter of the terminal end of the conduit preferably exceeds the inner diameter of the first section of the tubular connector.

The second conduit terminal protrusion preferably comprises a flank extending generally radially of the second conduit terminal end and facing away from the first conduit terminal end. The protrusion may include at least one passageway, and the protrusion of the pallet may include: prior to insertion of the first section of the connector into the terminal end of the second conduit;
from the terminal end of the second conduit to the first end of the connector.
The section is aligned with the passageway before being pulled out.

The front flank of the projection on the pallet preferably tapers radially outwardly from the connector in a direction away from the second section of the connector.

The annular sealing means may include at least one external sealing lip that engages the inner surface of the terminal end of the second conduit. Additionally, or in place of one or more external sealing lips, the sealing means may include one or more internal sealing lips that engage the external surface of the first section of the tubular connector.

The sleeve of the biasing means may be comprised of a radially outwardly extending collar adjacent the front end of the first section of the tubular connector. Such a collar may extend radially outwardly over at least a portion of the first section of the connector, or over the entire section.

The sleeve of the biasing means may consist of a ring of deformable resilient prongs extending substantially parallel to the shaft of the tubular connector and a plurality of prongs and alternating slots.

The prong is surrounded by a terminal end of the first conduit, and further the biasing means preferably comprises:
The ring comprises a ring surrounded by a ring of prongs and pressing the prongs against the inner surface of the terminal end of the first conduit.

The prong may include a plurality of protrusions that maintain engagement through deformation with the terminal end of the first conduit.

Further, the prong has a generally radially inwardly extending terminal end disposed within the confinement of the first conduit.

The terminal ends of such prongs may consist of lugs that are angled relative to the axis of the tubular connector in the undeformed state of the prongs.

The ring pressing the projections of the prongs radially outward may be provided with projections in the form of ribs extending into slits between adjacent prongs.

The second section of the tubular connector may include a generally ring-shaped internal rib that engages an outer surface of the terminal end of the first conduit.

The biasing means of such a coupling comprises a ductile metal sleeve having a radially enlarged portion located at the terminal end of the first conduit and surrounded by the ribs of the second section of the connector. It can be composed of

According to an embodiment, the biasing means comprises:
a ductile material having generally ring-shaped outwardly extending corrugations for interlocking the first conduit ends and pressing the first conduit ends against an inner surface of the second section of the connector; can be constructed from a metal sleeve.

The front part of the second section of the connector may constitute centering means extending to the terminal end of the second conduit.

When the biasing means constitutes a sleeve, the collar of such a sleeve preferably extends close to or actually in contact with the inner surface of the terminal end of the second conduit. can. An end face of such a collar may abut a terminal end of the first section of the connector. The collar may be replaced by a discrete centering ring, the centering ring being provided at the front of the sleeve and at the first position of the connector.
abutting the terminal end of the second conduit adjacent the section of the second conduit. The end face of the centering ring preferably abuts the front end of the first section of the connector.

According to an embodiment, the biasing means comprises:
integral with the first section of the connector;
and a sleeve surrounded by the terminal end of the second conduit.

The terminal end of the second conduit includes a first inner surface of a larger diameter adjacent to the open end thereof, a second inner surface of a smaller diameter remote from the open end, the first inner surface and the second inner surface of the second conduit. and an intermediate inner surface extending generally radially between the inner surface and the inner surface.

The first section of the connector may include an external shoulder that directly abuts the intermediate inner surface of the bend of the second conduit. This eliminates the need for annular sealing means. In order to ensure more accurate centering of the connector at the end of the second conduit, the end of the second conduit is provided with a second inner surface and a second inner surface of the end of the second conduit. The first cylindrical surface may be disposed between the intermediate inner surface and the first cylindrical surface and may be tapered in a direction away from the first inner surface.

The first section of the connector also includes:
A second cylindrical surface may be provided which is essentially at least complementary to and surrounded by the first cylindrical surface.

The terminal end of the second conduit may include a generally radially outwardly extending external stop;
The pallet may also include a protrusion having a first flank abutting a protrusion on the terminal end of the second conduit and a second flank abutting the stop.

The length of the elongated portion of the pallet may be equal to or approximately equal to the axial length of the protrusion on the terminal end of the second conduit.

The rear end of the pallet may be provided with an aperture that accommodates the pallet protrusion, so that a tool used to separate the pallet protrusion from the terminal protrusion of the second conduit can be inserted into the pallet. It can be introduced through an opening.

The novel features which characterize the invention are particularly pointed out in the claims. However, the improved coupling itself is best understood by reading the following detailed description of one particular embodiment with reference to the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a coupling consisting of a first conduit 1 in the form of a hose, made of a relatively soft thermoplastic material and of a tubular connector 2. Second or back section 6
The terminal end portion 10 is received at the end portion 10. tubular connector 2
is made from a hard thermoplastic material, the first of which is
That is, the previous section 5 is connected to the end 3 of the second conduit 4.
(hereinafter referred to as nipple), and this conduit 4 can constitute a part of a radiator in an automobile or the like. The outer diameter of the section 5 of the tubular connector 2 is smaller than the inner diameter of the nipple 3, and the section 5 is surrounded by an annular seal 7 of elastic material, which has two inner surfaces in sealing contact with the inner surface of the nipple 3. It has an elastic lip 8 and two internal elastic lips 9 in sealing engagement with the outer surface of the section 5. The width of the annular space or gap between the cylindrical outer surface of the section 5 and the cylindrical inner surface of the nipple 3 is such that the tubular connector 2 is connected to the nipple 3 until the front part of the section 6 also reaches the nipple 3. The annular seal 7 is selected to undergo the required deformation when inserted into the housing. The outer diameter of the section 6 of the tubular connector 2 is slightly smaller than the inner diameter of the nipple 3. The inner diameter of the section 6 is somewhat smaller than the outer diameter of the end 10 of the conduit 1 in its undeformed (uncompressed state) state. The front end of the termination 10 abuts an internal shoulder provided on the intermediate part 11 of the tubular connector 2 between sections 5 and 6. The terminal end 10 is deformed so that it remains in sealing engagement with the internal shoulder of the section 6.

The front end face of the terminal end 10 of the conduit 1 is preferably fixed, most preferably glued, to an adjacent shoulder of the intermediate part 11 of the tubular connector 2. For this purpose, the elements of the end 10 can be welded to the material of the tubular connector 2, or a suitable adhesive can be used at a temperature at which the end 10 and the intermediate part 11 firmly constitute a rigid unitary device. heated up to. The method of heating the end portion 10 and the intermediate portion 11 to the melting point of their respective plastic materials in order to achieve sufficient adhesion, and the method of cooling such parts to ensure a long-life integral connection, includes:
It does not constitute an element of this invention.

When obtaining the bond between the end part 10 and the intermediate part 11 by means of an adhesive, in particular when the conduit 1 is made of rubber, it can be constructed of a material which is activated by heating. The material activated by heating is added to the intermediate part 11 and/or to the end part 10, after which the end part 10 is inserted into the section 6 of the tubular connector 2 and then the end part 10 is heated to the vulcanization temperature of the rubber. and heats the intermediate portion 11.

According to a presently preferred embodiment of the invention, the inner diameter of the section 5 of the tubular connector 2 is
0 is in the undeformed state, it is larger than the inner diameter of the terminal end 10.

The rear end 12 of the section 6 constitutes a radially outwardly widening flange which gradually transitions into the rear end 15 of the two mirror image elastic pallets of the tubular connector 2, i.e. the pawls 13. The elongated middle part 14 of the elastic pallet 13 extends substantially parallel to the axis of the tubular connector 2, and the front end of the middle part 14 is provided with a radially inwardly extending projection in the form of a tooth 16; This tooth 16 has a radially extending internal flank 21 which meshes with a radially extending flank 20 of a circumferential projection or rib 17 on the outside of the nipple 3 . nail,
That is, the width of the elastic pallet 13 decreases in the direction from the rear end 12 of the section 6 towards the conduit 4.
Furthermore, the thickness of the intermediate portion 14 of the elastic pallet 13 is
Preferably, it decreases in the direction from the rear end 15 towards the corresponding tooth 16. Such a configuration contributes to the flexibility of the intermediate portion 14, and the ribs 17
It is convenient for the engagement between the flank 20 and the teeth 16 and for their separation.

The ribs 17 are provided with axially extending passageways or notches 18, each notch 18 being sufficiently wide to allow a tooth 16 of the elastic pallet 13 to pass therethrough. After rib 17, flank 19 is flank 20
It is gradually sloped from there toward the open end of the nipple 3. The purpose of the cutouts 18 is to facilitate the installation of the elastic pallets 13 and their removal from the ribs 17. All that is required is to align the teeth 16 with the notches 18 and to move the tubular connector 2 in the axial direction of the nipple 3 or vice versa. When the internal flank 21 of the tooth 16 is placed to the left of the flank 20 of the rib 17, the tubular connector 2 is rotated relative to the nipple 3 and vice versa, so that the internal flank 21 engages the flank 20,
Conduits 1 and 4 are fixedly connected to each other. Alternatively, by simply sliding the forward and outwardly inclined front flank 22 along the inclined rear flank 19 of the rib 17 and moving the tubular connector 2 axially towards the conduit 4, the tubular connector 2
can be attached to nipple 3. The inclination of the front flank 22 is based on the axis of the tubular connector 2.
It can be equal to or about 30°.

The open end of the nipple 3 is surrounded by a conical inner surface 23 which widens outwardly in the direction away from the main part of the conduit 4, the inner surface 23 introducing the front part of the section 6 of the tubular connector 2 in the nipple 3;
And it is used for centering. The inclination of the inner surface 23 with respect to the axis of the tubular connector 2 is within a range of 15°.
The inclination of the rear flank 19 with respect to the axis of the tubular connector 2 is approximately 21°.

Furthermore, the coupling of FIG. 1 is provided with biasing means for biasing the terminal end 10 of the conduit 1 radially outward into sealing engagement with the inner surface of the section 6. The biasing means is constructed of a radially expandable sleeve 24 of synthetic plastic material.
and a ring 28 which is surrounded by the right end part of the sleeve 24 in the area within the enclosure of the termination 10 and the section 6. The sleeve 24 has an axially elongated slot 26.
are alternated with axially parallel prongs 25. Each slot 26 extends to the right hand end face of sleeve 24. The left hand end of prong 25 is integral with a radially outwardly extending collar 30. This collar 30 extends radially outwardly beyond the outer surface of the section 5. The rear end face of the collar 30 preferably abuts the adjacent end of the section 5. The member of the sleeve 24 is an elastic body, and its prongs 25 tend to rotate radially inward. Each such prong 25 has a projection 27 which is connected to the conduit 1 by means of a ring 28.
is biased toward the inner surface of the terminal end 10 of. The number of prongs 25 and the protrusion 27 at the end 1 of the conduit 1
The number of prongs 25 in the ring of prongs 25 on the collar 30 of the sleeve 24 is It can be selected according to desire.

FIG. 2 shows one embodiment of ring 28, which is preferred herein. This ring 28 is formed by a radially outwardly extending projection in the form of axially parallel ribs 29 . Each rib 29 has a ring 2
8 fits into one of the slots 26 when properly installed in the sleeve 24. The rib 29 allows the member of the terminal end 10 of the conduit 1 to fit into the slot 26.
The right-hand end adjacent to the right-hand end cannot be penetrated. As a result, the terminal end 10 is pressed more evenly,
A reliable holding force is obtained in the section 6 of the tubular connector 2.

The collar 30 not only serves to insert the prong 25 into the section 5 and the termination 10, but also forms an abutment for the annular seal 7 between the section 5 and the nipple 3. When the collar 30 touches the front end of the section 5,
The length of the prongs 25 is selected so that the protrusion 27 is located at an optimal distance from the intermediate portion 11. The right-hand end of prong 25 is provided with a radially inwardly extending lug 31 . The lugs 31 delimit the extent in which the ring 28 can be inserted into the sleeve 24.

In the undeformed state of the sleeve 24, the prongs 25 are sloped such that their projections 27 form a composite ring having an outer diameter that is less than or equal to the inner diameter of the terminal end 10 in the undeformed state. This allows the sleeve 24 to be connected to the section 5 and the terminal end 10.
It is easy to insert into. In this case, the lugs 31 of the prongs 25 are arranged in a plane that is not exactly perpendicular to the axial direction of the tubular connector 2. The ring 28 is inserted into the collar 3 when inserted.
As the prongs 25 are rotated relative to 0, the protrusions 27 move radially outward, deforming the end 10 of the conduit 1 and also adding a sealing engagement between the end 10 and the section 6. can be obtained. When the prongs 25 reach the lugs 31, the forward movement of the ring 28 ends. FIG. 1 shows that the intermediate portions of the prongs 25 are arched when the ring 28 contacts the lugs 31 and the collar 30 contacts the front end of the section 5.

If the sleeve 24 and ring 28 are provided when the terminal end 10 of the conduit 1 is attached to the intermediate part 11 of the tubular connector 2 or is bonded to the middle part 11 of the tubular connector 2, when the coupling ring of the present invention is actually used. Additionally, safety is provided, further reducing the possibility of the conduit 1 becoming dislodged from the tubular connector 2. When the coupling ring is provided with biasing means comprising a sleeve 24 and a ring 28, the end 1
Adhesion between 0 and intermediate portion 11 is not always required.

FIG. 3 shows another embodiment of the ring 32. Ring 32 may be used in place of ring 28, which completes the circumference of the coupling shown in FIG. The ring 32 is a slit ring, and a slit 33 is arranged in a plane inclined with respect to its axis. Such a ring 32 preferably includes:
Made of metallic material, for example spring steel. In the undeformed state of the ring 32, its outer shape is selected such that when introducing the ring 32 into the space within the protrusion 27 of the prongs 25, the width of the slit 33 is reduced. Correctly inserted ring 32 then extends protrusion 27 to terminal end 10 of conduit 1.
biased against the inner surface of the section 6 to maintain the termination 10 in a well-sealed engagement with the inner surface of the section 6. The ring 32 protects against a final loss of elasticity of the end 10 and/or against radial changes in the end 10 as a result of heating and/or cooling of the conduit 1 and/or section 6. compensation.

An important advantage of the inventive coupling is that the length of the terminal end 10 of the conduit 1 introduced into the tubular connector 2 is reduced to a small fraction of the length of the terminal end in conventional couplings. This is based on the fact that the sleeve 24 and ring 28 of the invention ensure a reliable and sealed engagement between the end portion 10 and the section 6. The dimensions of the sleeve 24 and the ring 28 or 32 are such that the assembled coupling helps pull the end 10 of the conduit 1 out of the tubular connector 2 and/or
or can be easily selected to be able to withstand the strong axial stresses that serve to pull the termination 10 and the tubular connector 2 out of the nipple 3. The sealing effect between the end portion 10 and the section 6 is completely satisfactory. As mentioned above, by fixedly connecting the front end face of the terminal end 10 to the adjacent face of the intermediate part 11 of the tubular connector 2, said sealing effect can be strengthened. When the end portion 10 is bonded to the intermediate portion 11, the axial length of the end portion 10 extending to the section 6 and surrounding the protrusion 27 of the prong 25 is further shortened to be equal to the axial length of the section 6. can do.

The radial dimension of the annular space of the annular seal 7 is chosen such that the annular seal 7 (together with the section 5) does not exhibit excessive resistance to introduction into the nipple 3. The configuration shown allows assembly of couplings by robots, which is of particular importance in fully automated assembly plants such as automobiles. As explained above, the nipples 3 can form part of a radiator of a motor vehicle, and such radiators can each be connected to discrete hoses in the manner shown in FIG. It is possible to provide two or more nipples.

The reliability of the coupling of the present invention is due to the fact that the rear end 1 of the elastic pallet 13 at the rear end of the section 6
5 is integral with the rear end portion 12,
It has been strengthened. It has been found that this attachment of the elastic pallet 13 to the section 6 contributes to obtaining a more reliable connection between the teeth 16 and 17.
Such a connection can withstand very strong axial stresses. The bond between the end portion 10 and the intermediate portion 11 can be selected with a view to increasing the resistance it exhibits to axial stresses that tend to pull the end portion 10 out of the tubular connector 2. When bonding with adhesive,
The adhesive need not be of thermoset type.
This eliminates the need to heat the end portion 10 and the intermediate portion 11 to a temperature that allows the heat activated adhesive to bond the end portion 10 and the intermediate portion 11 to each other. The integral connection between the rear end 15 of the elastic pallet 13 and the rear end 12 of the section 6 is preferred from the additional point of view that this makes it possible to create a relatively long intermediate section 14. It is. The elasticity of the relatively long intermediate section 14 is thus sufficiently strong that, as a result of the sliding of the teeth 16 along the rearward and inwardly sloping rear flanks 19 of the ribs 17, the nipple 3 has a tubular shape. When installing the connector 2, i.e. when rotating the intermediate part 14 relative to the rear end 12, the elastic pallet 13 is bent appropriately. Each elastic pallet 13 is
It can be said that it constitutes a long lever, the rear end 15 of which is integral with the rear end 12,
The other end carries a respective tooth 16. Each rear end 15 is preferably integral with the rear end 12 and has a radially outwardly extending extreme end and an arcuate end recessed into the rear end 15 of the intermediate section 14 of the respective elastic pallet 13. This includes: The arcuate rear end 15 allows easy introduction of the terminal end 10 of the conduit 1 into the section 6 on the tubular connector 2. Furthermore, when the conduit 1 is bent adjacent to the rear end 12 so that its outer surface contacts the rear end 15 of one or the other end of the elastic pallet 13, the arcuate rear end 15
can constitute a junction or a stop to an adjacent part of the conduit 1. When the coupling according to the invention is used in an automobile, such a configuration of the elastic pallet 13 ensures that the tubular connector 2 and the end 10 of the conduit 1 can withstand the substantial vibrations and/or drift that occur. It has become clear that this is possible. Furthermore, the arcuate rear end 15 of the elastic pallet 13 strengthens the ability of the elastic pallet 13 to withstand strong bending stresses in the region where the elastic pallet 13 joins the rear end 12 of the section 6 of the tubular connector 2. That's what I do. Such bending occurs when the teeth 16 slide on the flanks 19 after the ribs 17 in a direction that causes the flanks 20 to engage.

By using a tapered elastic pallet 13 in the radial and/or peripheral direction of the tubular connector 2,
This not only saves material but also increases the elasticity of the intermediate part 14, and the teeth 16 are similar to the ribs 17 on the nipples 3.
enhances the ability to engage with or disengage from the flank 20 of the Such a structure of the elastic pallet 13 does not have an adverse effect on the strength of the rear end 15 that joins the rear end 12 of the section 6.

The characteristic that when the terminal end 10 is expanded by the protrusion 25 of the sleeve 24, the inner diameter of the section 5 is larger than the inner diameter of the terminal end 10 in the non-deformed state of the conduit 1 is that Helps enhance sealing action.

The structure of the rib 17 can be modified from the structure shown. However, the illustrated structure is presently preferred because the ribs 17 can be formed in a simple and economical manner. Furthermore, rib 1
The gradually sloping rear flank 19 of 7 helps the teeth 16 to move towards and mesh with the flank 20.

Internal elastomeric lips 8 and/or 9 on annular seal 7 are optional, but preferred and effective. By providing such inner elastic lips 8 and 9, it is possible to attach the annular seal 7 on the section 5 and insert the front parts of the sections 5 and 6 into the nipple 3 when assembling the coupling. Make it easy.

The reason why the center of the prongs 25 is bent when the insertion of the ring 28 is completed is to prevent the ring 28 from being inadvertently moved away from the lugs 31 due to the inwardly swollen portion of the prongs 25. It is preferred and also convenient because it prevents.

FIG. 4 is a sectional view of a coupling showing another embodiment in which the section 5 and elastic pallet 13 are different from the embodiment shown in FIG. 1, and is a view before the section 5 is subjected to deformation processing. Fifth
This figure is a sectional view showing a state in which the section 5 shown in FIG. 4 is deformed and the conduit 1 is sandwiched between the section 5 and the elastic pallet 13. In the figure, the section 6' of the tubular connector 2a has a circumferentially complete or interrupted internal rib 34 which engages the outer surface of the end 10 of the conduit 1. Additionally, the biasing means of the coupling shown in FIGS. 4 and 5 consists of an integral sleeve 24a of ductile metal material. This sleeve 24a does not have grooves or other structural cuts. Its left end extends radially outward and constitutes a collar 30, which serves as a joint to the front end of the section 5 and prevents the annular seal 7 from moving too far to the left. Used as a stopper.

The sleeve 24a has a section 5 and a terminal end 1.
0, a large diameter rear end 35 adjacent the collar 30, a small diameter front end 36 surrounded by the terminal end 10 of the conduit 1, and a direction from the rear end 35 to the front end. 36 and a conical intermediate section 37 slanting radially inward. The outer diameter of the rear end 35 may be equal to or slightly narrower than the inner diameter of the section 5, and the outer diameter of the front end 36 may be equal to or slightly narrower than the inner diameter of the terminal end 10. The size of the front end portion 36 is
Preferably, the distance between its outer surface and the radially innermost portion of the inner rib 34 on the section 6' is selected to be equal to or approximately equal to the thickness of the end portion 10. This allows the terminal end 10 to be easily introduced into the annular space between the interior 34 and the front end 36 of the sleeve 24a. Similarly, by the method shown in FIG. 4, the termination 10 is first introduced into the section 6' of the tubular connector 2a,
It is also possible to insert the sleeve 24a afterwards. In the next step, the cylindrical mandrel 38 is introduced into the sleeve 24a and moved from the position of FIG. 4 to the position of FIG. The diameter of the mandrel 38 is the rear end 3
5 is equal to or approximately equal to the inner diameter of mandrel 3.
8 is the front end portion 3 of the sleeve 24a together with the intermediate portion 37.
6 is expanded, so that the sleeve 24a finally assumes a cylindrical shape with a constant diameter, with the collar 30 at its left end. This results in a significant deformation of the termination section 10, with the internal ribs 34 of the section 6' establishing a peripheral full or intermittent compression on the outer surface of the termination section 10 and the inner surface of the termination section of the termination section 10. A strong sealing engagement is made with the outer surface of the expanded portion of the sleeve 24. Since the material of the sleeve 24a is ductile, the structure of the expanded sleeve 24a is such that the rib 17 of the nipple 3 (not shown in FIGS. 4 and 5) is connected to the tubular connector 2a.
There will be no change even if the mandrel 38 is pulled out before being installed. Mandrel 38 need not be made from the same relatively hard synthetic plastic as tubular connector 2a.

Although FIGS. 4 and 5 do not show the bonding between the front end of the terminal end 10 of the conduit 1 and the intermediate portion of the tubular connector 2a, such bonding may be accomplished in the manner described for the connection in FIG. That is, the terminal end 1 is attached to the tubular connector 2a.
0 or by using a suitable heat-activated adhesive or other adhesive.

An advantage of the coupling shown in FIGS. 4 and 5 is that its biasing means are simpler than the sleeve 24 and ring 28 of the coupling shown in FIG. If desired, the sleeve 24a of FIGS. 4 and 5 can be modified by providing longitudinally extending slots in the intermediate section 37 and adjacent the forward end 36.
Providing such a groove facilitates radial expansion of the front end portion 36 and the intermediate portion 37 when the mandrel 38 is introduced.

The features of the sleeve 24a in FIGS. 4 and 5 are as follows:
The intermediate section 37 and the front end 36 are arranged so that the rib 24a can be introduced with negligible force into the section 5 and into the terminal end 10 of the conduit 1.
The size of the image can be easily selected. The internal rib 34 is connected to the expanded sleeve 24a.
In cooperation with the front end 36, middle part 37 of the tubular connector 2a, it is able to withstand strong axial stresses which serve to pull the terminal end 10 out of the space between the section 6' of the tubular connector 2a and the expanded sleeve 24a. .

In the range shown in FIG. 5, it is not absolutely necessary to expand the front end portion 36 and the intermediate portion 37. Due to the expansion of the front end 36 and the intermediate part 37, the terminal end 10 is located within the section 6' of the tubular connector 2a.
is fully guaranteed to hold.

FIG. 6 is a sectional view of a coupling showing still another embodiment in which the section 5 and the elastic pallet 13 are different from the embodiment shown in FIG.
FIG. 6 is a diagram before section 5 is subjected to transformation processing.
FIG. 5 is a sectional view showing a state in which the section 5 shown in FIG. 4 is deformed and the conduit 1 is sandwiched between the section 5 and the elastic pallet 13. Again, the biasing means comprises an integral sleeve 24b of ductile metal material. The collar 30 at the left end of the sleeve 24b constitutes a radially outwardly extending collar, which abuts the terminal end of the adjacent section 5 and closes the annular seal 7.
A stopper is configured to prevent excessive movement in the left axis direction. The main parts of the sleeve 24b are:
The sleeve 24b is attached to the section 5 of the tubular connector 2.
and before being introduced into the terminal end 10 of the conduit 1, it constitutes a cylinder. The difference between the embodiment of FIGS. 4-5 and the embodiment of FIGS. 6-7 is that it is necessary to utilize a deformed mandrel 42 due to the deformation of the intermediate portion of the sleeve 24b. , an additional part in the form of a tubular guide or cage 39 has at least one window 40 extending radially relative to the spherical deformation element 41 . Deformation element 41
is selected to be larger than the thickness of the car 39, so that part of the deformation element 41
9 extends radially inwardly beyond the inner surface of the cage 39 when correctly inserted into the cylindrical portion of the sleeve 24b. When the sleeve 24b is inserted into the section 5 and the terminal end 10, the outer shape of the cylinder portion of the sleeve 24b is the same as that of the section 5.
is equal to or approximately equal to the inner diameter of The wall thickness of the cylinder portion of the sleeve 24b is equal to that of the section 5 and/or section 6 of the tubular connector 2.
occupies a small portion of the thickness. Furthermore,
The wall thickness of the cylindrical portion of the sleeve 24b will account for a smaller portion of the thickness of the cylindrical portion of the tubular cage 39. The outer diameter of the cylinder portion of the cage 39 can be approximately equal to or slightly smaller than the inner diameter of the sleeve 24b. This cage 39 may be provided with a set of two, three or four, preferably equidistant openings or windows 40, each window 40 receiving a discrete spherical deformation element 41. . The front (left hand) end 47 of the guide of the car 39 may constitute a dish-shaped end wall or washer-like body that serves as a stop for the small diameter front end 43 of the mandrel 42. The main portion 44 of the mandrel 42 constitutes a cylinder with a diameter equal to or slightly smaller than the inner diameter of the cage 39. Thereby, when the mandrel 42 is introduced into the car 39 and its front end 43 advances beyond the deformation element 41, the large diameter main part 44 of the mandrel 42 displaces the deformation element 41 radially outward; These deform the adjacent portions of the sleeve 24b. In the next step, the mandrel 42 and/or the cage 39 are rotated about the axis of the sleeve 24b, so that each protrusion formed by the deformation element 41 has a complete periphery as shown in FIG.
Or it is converted into intermittent undulations 46. Such undulations 46 deform the adjacent portion of the conduit 1 so that the terminal end 10 is held in proper sealing engagement by the inner surface of the section 6 of the tubular connector 2 together with the adjacent outer surface of the sleeve 24b.

The diameter of the deformation element 41 and the wall thickness of the cage 39 determine one or more corrugations 46 in the cylindrical portion of the sleeve 24b. The diameter of the front end 43 of the mandrel 42 is preferably selected to be smaller than the outer diameter of the cylindrical part of the cage 39 by at least the diameter of the spherical deformation element 41 .

The method of assembling the couplings of FIGS. 6 and 7 is as follows. In a first step, the annular seal 7 is slipped into the section 5 of the tubular connector 2 and the terminal end 10 of the conduit 1 is slipped into the section 6. Inserting the terminal end 10 into the section 6 in this manner can be carried out before or after inserting the cylindrical part of the sleeve 24b into the section 5 and the terminal end 10. The next step is to advance the car 39 to the position shown in FIG. 6, whereby the deforming element 41 expands inside the cylindrical part of the car 39 and the car 39 into the cylindrical part of the sleeve 24b. This does not impede the ease of insertion and further insertion into the interior of the conduit 1.
The next step is to install the mandrel 42 in the manner shown in Figure 6.
, the front end 43 is surrounded by one or more deformation elements 41 . Mandrel 42
As the car continues toward the front end 47 of the car 39,
The main portion 44 will move one or more deforming elements 41 radially outward, thereby deforming the adjacent portion of the sleeve 24b. As previously mentioned, the final step involves rotating the cage 39 relative to the sleeve 24b and/or vice versa, so that the sleeve 24b is formed by a continuous or composite corrugation 46. The direction of insertion of mandrel 42 into cage 39 is indicated by arrow 45. During or after advancing mandrel 42 toward its right-hand end position in FIG.
The car 39 can be rotated relative to the car 39.

Following this, the mandrel 42 is withdrawn by moving in the direction opposite to the direction indicated by the arrow 45, so that as soon as one or more deformation elements 41 surround the small-diameter front end 43 of the mandrel 42, they The deforming element 41 of can be moved radially inwardly. The car 39 and the mandrel 42 are then pulled out together without the deformation element 41 escaping the respective window 40. In other words, the mandrel 42
does not need to be pulled out from the car 39 (towards the left) beyond the position shown in FIG. If the cage 39 is provided with a plurality of suitable protrusions or pawls that allow the deformation element 41 in the window 40 to move in the radial direction to some extent, the mandrel 42 can be sufficiently pulled out of the cage 39 and the deformation element 41 are prevented from escaping through each window 40.

If desired, the stability of the coupling shown in FIGS. 6 and 7 can be further enhanced by gluing the front end of the terminal end 10 of the conduit 1 to the intermediate part of the tubular connector 2.

The spherical deformation element 41 of FIGS. 6 and 7 may be replaced by deformation elements of other constructions without departing from the spirit of the invention. For example, FIGS. 8 and 9 show a deformed deformation element 4 resembling a portion of a ring whose curvature matches or substantially matches the curvature of the peripheral surface of the central portion 44 of the mandrel 42.
1' is shown. Each deformation element 41' has two parallel vertical surfaces that can fit into each window of the car 39 (not shown in FIGS. 8 and 9) with a certain amount of play.

A feature of the deforming element 41' is that when the mandrel 42 is moved toward an axial configuration corresponding to the mandrel 42 of FIG. It is that you are. This ensures that the deformation elements 41' are in contact with each other and
reduces the pressure per unit of surface of the deforming element 41' and mandrel 42 in the process of deforming adjacent portions of the sleeve 24b. Suitable lubrication can be provided between the concave surface of the deformation element 41' and the outer surface of the main portion 44 of the mandrel 42. This serves to insert the mandrel 42 into the cage 39. The radius of each deformation element 41' can be made to match or approximately match the diameter of the spherical deformation element 41 shown in FIGS. 6 and 7. Each window receiving a deformation element 41' need not be circular. In order to provide a more predictable guidance of the deformation elements 41' in the radial direction of each car 39, such windows are preferably polygonal.

The method of bringing the elastic pallet 13 of the coupling shown in FIGS. 4-5 and 6-7 into engagement with the rib 17 of the nipple 3 or separating it from this is the same as that described in connection with FIG. It's the same thing.
If the rib 17 is not provided in the cutout 18 (or if the operator does not require the effect of such a cutout), the front part 5 (the annular seal 7 above it)
When the teeth 16 of the elastic pallet 13 are pushed into the nipple 3, the teeth 16 of the elastic pallet 13 slide along the rear flank 19 of the rib 17 and, due to the inherent elasticity of the elastic pallet 13, finally engage with the flank 20. The inner surface 23 of the conical body extending outwardly of the nipple 3 is
The tubular connector 2 or 2a and the annular seal 7 are introduced into the nipple 3, and the tips of the teeth 16 are inserted into the rib 1.
7 helps ensure engagement with the rear flank 19. As previously mentioned, the intermediate portion 14 of the elastic pallet 13 is radially and circumferentially tapered, and the elastic pallet 13
Because the rear end 15 is integral with the rear end 12 at the rear end of the section 6 or 6' of the tubular connector 2, the lever arm of the elastic pallet 13 is relatively long and the tubular connector 2 into the nipple 3 and move the teeth 16 radially outwards, no significant force is required. Furthermore, the front flank 22 of the tooth 16 serves to properly advance the tooth 16 towards and mesh with the rear flank 19 of the rib 17 on the nipple 3.

Subsequently, when the operator wishes to disconnect the tubular connector 2 or 2a from the nipple 3, he moves the coupling or nipple 3 to an angular position in which each tooth 16 correctly aligns with a notch 18 in the rib 17. Only the inner elastic lip 8 of the annular seal 7 opposes the withdrawal of the front part 5 from the inside of the nipple 3. When the ribs 17 are properly terminated by the teeth 16, the two teeth 16 are each provided with two notches 18.
It may be arranged so that it is arranged approximately in the middle of the two.
Similarly, there may be four or more notches such that it is sufficient to shift the tubular connector 2 and nipple 3 by a relatively small angle in order to move each tooth 16 into alignment with one of the notches 18. It is also possible to provide ribs 17.

If it is not easy to rotate the tubular connector 2 or 2a relative to the nipple 3, the operator can use the tip of a screwdriver or other suitable tool to push the teeth 16 of the two elastic pallets 13 radially outward. By moving and disengaging the ribs 17 from the flanks 20, the tubular connector 2 may be axially offset from the conduit 4 by 2/2 of the tubular connector 2.

As mentioned above, the teeth 16 are connected to the tubular connector 2.
It is also possible to assemble the two halves of the tubular connector 2 without having to move them radially outward from the front part 5 of the connector. All that is required is to align each tooth 16 with one of the notches 18 and then advance the tubular connector 2 in the direction of the conduit 4, thereby moving the tooth 16 to the left beyond the flank 20, after which the nipple 3 It is only a matter of rotating the tubular connector 2 relative to the tooth 16 and moving the radially extending internal flanks 21 of the teeth 16 into engagement with the flanks 20 of the ribs 17. This method of attaching the hose 1 to the conduit 4 is convenient when the material of the hose 1 is easily deformable, so that the terminal end 10 is screwed and the teeth 16 are moved relative to the adjacent portion of the hose 1, respectively. can fit into one of the notches 18.

Each embodiment of the coupling according to the invention has the advantage that the outer diameter of the terminal end 10 of the hose 1 does not need to be set with high precision. This is because there is no need to surround the end 10 of the hose 1 with a metal clamp or clasp, as is known in many conventional hose couplings. The fact that there is no need to calibrate the accuracy of the end 10 of the hose 1 is advantageous in terms of the simplicity and low cost of the tubular connector 2. All that is required is that the termination 10 is connected to the section 6 or 6' of the tubular connector 2 or 2a.
Terminal part 1 so that it can be easily introduced into
Just choose a size of 0.

Furthermore, the coupling of this invention has nipple 3.
and/or the advantage is that it is not necessary to calibrate the section 6 or 6' of the tubular connector 2 with high precision. When the coupling ring is completely assembled, even if there is some play, the tubular connector 2
Regardless of the quality of the section 6 or 6', it is possible to receive the section 6 or 6' in the nipple 3. The gap between the section 6 or 6' on the one hand and the inner surface of the adjacent part of the nipple 3 on the other hand is between the outer surface of the front section 5 and the nipple 3 on the other hand.
is completely compensated by the annular space between the inner surface of the adjacent part.

FIG. 10 shows a coupling of another embodiment,
The nipple 3a of the conduit 4 (eg part of a car radiator) is shorter than the nipple 3 of FIG.
Furthermore, the collar 30a is equal to or approximately equal to the inner diameter of the nipple 3a and the adjacent portion of the conduit 4 at the left-hand axial end of the sleeve 24c of the biasing means. The right end surface of the collar 30a is in contact with the inner elastic lip 8 of the adjacent annular seal 7 and the front end of the front portion 5 of the adjacent tubular connector 2. 1st
The left end surface of the front portion 5 of the tubular connector 2 shown in FIG. 0 does not require a rounded outline like the front portion 5 shown in FIG. However, the front part of the section 6 (in the area of the intermediate part 11) fits comfortably into the adjacent part of the inner surface of the nipple 3a. This, when combined with the property of the collar 30a contacting the inner surface of the conduit 4, reduces the possibility of the tubular connector 2 wobbling within the nipple 3a and conduit 4.

The conduit 4 or nipple 3a has a joint in the form of a radially outwardly extending surface, i.e. a stop 4.
8, and this face is remote from the radial flank 20 of the rib 17, so that in the fully assembled state of the coupling shown in FIG. The inclined front flank 22 abuts the stop 48. The stopper 48 further reduces the possibility of the tubular connector 2 wobbling on the nipple 3a.
Helps reduce. Even if the front part of the section 6 and/or collar 30a is received in the conduit 4 and nipple 3a with some play, such wobbling is prevented or the possibility thereof is greatly reduced. This allows conduit 4 to hose 1
The possibility of the tubular connector 2 getting stuck or wobbling in a position where it cannot be easily moved in the direction of removal is reduced, and the absence of wobbling reduces rapid and severe wear of the annular seal 7. , it is desirable and advantageous to prevent wobbling of the tubular connector 2. These properties contribute to a more satisfactory sealing action and long service life of the coupling of the invention.

Figure 11 shows the first coupling shown in Figure 10.
This shows the deformation of Collar 30b represents a discrete centering ring replacing collar 30 or collar 30a and is a separately made part adapted to the left hand end of front part 5 of tubular connector 2b. . The section 6 of the tubular connector 2b is or can be the same as the section 6 of the tubular connector 2 shown in FIG. hose 1
The sleeve 2 of the biasing means against the terminal end 10 of
4d is integral with the front end of the front part 5 of the tubular connector 2b. The collar 30b can be glued to the adjacent end of the front part 5. The same thing is
This also holds true for the collar 30a of the sleeve 24c shown in FIG. That is, the collar 30a can be made as a separate part and can be glued or secured to the adjacent end of the sleeve 24c.

The coupling of FIG. 12 is identical to that of FIG. 11 in that the sleeve 24d of the biasing means for the terminal end 10 of the hose 1 forms an integral part of the front part 5 forming the tubular connector 2b. Collar 30b in FIG. 11 is omitted. The inner surface of the nipple 3b of the conduit 4 shown in FIG.
9 and a large diameter portion 50 surrounding the resilient seal 7'. This elastic seal 7' does not have any or strong internal and/or external sealing lips. The largest diameter portion 51 of the inner surface of the nipple 3b receives the left end of the section 6 of the tubular connector 2b. The elastic seal 7' is suitably compressed and deformed so that the teeth 16 of the elastic pallet 13 (only one shown) engage the radial flank 20 of the rib 17 and at the same time contact the stop 48 of the conduit 4. At this time, it is in a state of sealing engagement with the front portion 5 and the nipple 3b.

The coupling of FIG. 12 has the advantage of consisting of a minimum number of parts, namely two conduits, a tubular connector 2b and a simple elastic seal 7'. Despite this, the tubular connector 2b can be arranged in four separate locations, namely in the region of the part 49 where the inner surface of the nipple 3b has the smallest diameter, in the region of the part 51 of the largest diameter of the inner surface of the nipple 3b, in the region of the flank 20 and at the stop. It is held against tilting and other stray movements in the area of 48.

Each of the embodiments shown in FIGS. 10, 11 and 12 has tubular connectors 2, 2 for nipple 3
The absence of wobble b has the important effect that the annular seal 7 or 7' is protected from excessive and rapid wear. Tubular connector 2, 2b
Wobble is caused by the unavoidable frequent bending of the hose 1 and/or the conduit 4 and/or when the coupling is used in practice, for example in an automobile.
Or it may be caused by other stray movements of the hose 1. When there is no wobble, the possibility of leakage of the enclosed liquid in the connector area between the conduit 4 and the hose 1 is considerably reduced.

The structure of FIG. 11 has a lower cost than a complex sleeve in which the collar is integral with the branch and which has to fit comfortably into the nipple 3 or the adjacent part of the 3 conduit 4.
This shows that it is possible to manufacture 0b.

The provision of a stop 48 is preferred and expedient, since such a stop defines the axial length of the space of the annular gap for the annular seal 7 or 7'.

Making the sleeve as an integral part of the connector is preferred and advantageous because it greatly reduces the number of component windows and reduces the cost of stocking spare parts for couplings.

Whether or not the sleeve is integral with the connector, there is no problem in constructing the connector in any suitable shape and manufacturing a synthetic plastic article. One reason for this is that there is no need to provide the outer surface of the front part 5 of the connector with one or more peripherally extending grooves for a seal or seals.
This eliminates the problems associated with lifting the completed connector from the mold or extruder cavity.

Figures 13 and 14 show another embodiment of the connector, in which the tubular connector 2c has three equidistant pallets, namely the elastic pallet 13'.
each having a rear end 1 at the rear end of section 6.
It is one with 2. Contrary to the embodiment described earlier,
The thickness of the long intermediate section 14' of the elastic pallet 13' (measured in the radial direction of the section 6) is constant. This can be seen immediately by looking at Figure 13. Additionally, the rear end 15' of the resilient pallet 13' is not arcuate as shown in FIG. Instead, the rear end 1
5' is the rear end of section 6, straight from the rear end 12;
Extends slightly forward and radially outward.
This simplifies the design of the mold cavity forming the tubular connector 2c of FIGS. 13 and 14. The rear end 15' of each resilient pallet 13' has an opening 52 aligned with the respective tooth 16. As is clear from FIG. 14, the width of each portion 51 (when measured from the circumferential direction of the tubular connector 2c) is equal to or approximately equal to the size of the corresponding tooth 16. The purpose of the opening 52 is to allow insertion of a protrusion in the molding forming the tubular connector 2c. Such protrusions extend forwardly towards the molded part receiving the material forming the teeth 16. The protrusions described above are the tubular connector 2
When the setting of the material of c is completed and the tubular connector 2c is taken out or discharged from the molding cavity,
It is collected through the respective openings 52.

For the embodiment shown in FIGS. 11 and 12,
Sleeve 24e of the biasing means at the front end of the hose (not shown in FIGS. 13 and 14)
is integral with the intermediate portion 11 of the tubular connector 2c. The protrusions 25' of the sleeve 24e have a cylindrical outer surface of constant diameter when not under force (moved radially outward relative to the thirteenth dotted line position), and each protrusion has a cylindrical outer surface of constant diameter. 31 and a conical inner surface that tapers in the direction from the intermediate portion 11 toward the protrusion 31.

Connect the terminal end 10 of the hose 1 to the section 6 and the protrusion 2.
5', the robot or operator inserts the ring 28 by rotating the protrusion 25' in the area adjacent to the tubular connector 2c. As a result, the protrusion 2 of the protrusion 25'
7 engages and is held firmly on the end 10 of the hose 1, simultaneously pressing the outer surface of the end 10 against the inner surface of the section 6. Due to the taper of the projections 25', there is no need for the projections 27 to extend beyond the main portion of each projection 25'. This simplifies the fabrication of the tubular connector 2c in one piece with the sleeve 24e containing the protrusion 25' and aids in pulling the final product out of the cavity of the machine in which the tubular connector is being made.

The structure of nipple 3c is the same as nipple 3b in Fig. 12.
The structure is the same as that of The nipple 3c consists of a small diameter portion having a portion 49 surrounding the tip of the front portion 5, and a portion having an inner diameter slightly exceeding the outer diameter of the section 6 and having an inner surface corresponding to the inner surface 50 of the nipple 3b. The space between the two inner surfaces of nipple 3c is used to receive a seal, which may be of the type indicated by 7' in FIG. 12. However, such a space can also receive the annular seal 7 by an internal and/or external sealing lip.

The rib 17' of the nipple 3c is longer than the rib 17 of the nipple 3b of FIG. As shown in FIG. 13, the ribs 17' extend near the rear end 15' of the illustrated resilient pallet 13'. By this,
When the coupling shown in FIGS. 13 and 14 is actually used, the tubular connector 2c is connected to the nipple 3c.
The freedom of movement in the axial and/or radial direction is very limited or non-existent. Since the tubular connector 2c has no stray movements relative to the nipple 3c, or has no large stray movements, it wears the seal inserted between the front part 5 and the left hand of the nipple 3c profusely and rapidly. The possibility of this happening decreases.

FIG. 15 shows a portion of the coupling that has been deformed, and in particular shows the deformation of the structure shown within the dash-dotted circle X in FIG. In this embodiment, the nipple 3c has a large diameter section 49 and sections 49 and 5.
It has a cylindrical portion 49a located between 0 and 0. The inner surface of the cylinder 49a is a tubular connector 2d.
It is complementary to the cylindrical outer surface at the left end of the front part 5 of. The angle of inclination of the cylindrical surface shown in FIG. 15 can be equal to or about 15 degrees. The two cylindrical surfaces ensure proper centering of the tubular connector 2d in the nipple 3c.

The average diameter of the portion 49a of the inner cylinder on the nipple 3c is equal to the average diameter of the outer cylinder on the front part 5,
or approximately equal.

Referring finally to FIG. 16, a coupling is shown which constitutes a variation of the couplings of FIGS. 13 and 14. The biasing means of this coupling consists of a modified sleeve 24f with a collar 30c, which is attached to the tubular connector 2.
e has a bead 55 extending radially outwardly beyond the front end of the front section 5 and surrounding the forward and radially outermost part of the annular seal 7. The diameter of the collar 30c is slightly smaller than the inner diameter of the nipple 3c. The cylindrical inner surface 23 at the open end of the nipple 3c is complementary to the conical surface 54 of the rear end 15'' of the tubular connector 2e.The rear end 1 of the elastic pallet 13
5 extends generally radially outward and is integral with the rear end 12'. The rear end 15'' has an opening 5 which mates with the teeth 16 at the front end of the intermediate portion 14' of the elastic pallet 13'.
It has 2. The length of the rib 17' on the nipple 3c is equal or approximately equal to the length of the intermediate part 14' of the elastic pallet 13'. Inner surface 23 and conical surface 54
The contact area between the tubular connector 2e is preferably wide enough to greatly reduce the functionality of the tubular connector 2e,
It makes a stray movement with respect to nipple 3c. Furthermore, this enlarges the cross-sectional area of the rear end 12' and the rear end 15 of the illustrated resilient pallet 13', so that the resilient pallet 13' can withstand greater bending stresses. Furthermore, due to this design of the tubular connector 2e and its elastic pallet 13', the tubular connector 2e has a nipple 3c.
This makes it possible to withstand even greater axial stress when trying to separate the material from the material.

The structure of the sleeve 24f is similar to that of the sleeve 24c shown in FIG. The main difference is the provision of the radially outermost bead 55 of the collar 30c.

Many further variations of the illustrated coupling are possible. For example, the elastic pallet 13, 13' and the rear end 15, 15', 15'' can be made of metal material and connected to a ring made of spring steel or similar metal material, and In the process of making the connector in a molding or other machine, the plastic tubular connectors 2, 2a, ..., 2e are inserted into grooves around the outer periphery of the rear end 12 or 12'. When using a coupling ring, by making the elastic pallet 13, 13' as an integral part of the ring embedded in the flange member of the connector, it is possible to withstand the stress of even greater deformation (especially bending and deflection). In many cases, a resilient pallet made of synthetic plastic material will ensure that the connector is held in the optimum position relative to the nipple.

The foregoing has sufficiently clarified the gist of this invention, and without any further explanation, others will be able to determine, from the perspective of the prior art, that this invention contributes to the field by applying current knowledge. without excluding essential characteristics, both general and specific,
Various applications are readily available and it is therefore intended and understood that such applications fall within the scope of the claims and their equivalents. Since the present invention is configured as described above, it facilitates the work of attaching and detaching the connector for connecting the conduits, and also ensures the connection and sealing between them even when force is applied in the axial direction of the conduits. This has the effect of making it easier to remove the conduit from the connector in the event that the conduit is damaged.

[Brief explanation of the drawing]

1 is a partial front view and partial cross-sectional view of a fully assembled hose coupling that includes one form of the invention; FIG. 2 is a partial front view and partial cross-sectional view of a hose coupling that may be used with the hose coupling of FIG. FIG. 3 is a partial perspective view of the ring; FIG. 3 is a front end view of the deformed ring; FIG. Figure 5 shows the sleeve of ductile metal material before being expanded and deformed into engagement with the end of the hose; Figure 5 shows the structure of Figure 4 in the expanded state; Figure 6 shows the radial direction. a partial axial cross-sectional view of another coupling with a cage for one or more ball-deforming elements for expanding the sleeve to form outwardly extending corrugations in the sleeve and deformably engaging the end of the hose; 7 is a diagram showing the structure of FIG. 6 when the waveform forming step is completed, FIG. 8 is an end front view of the deformable element of another embodiment, and FIG. 9 is a diagram showing the structure shown in FIG. 8 along the line L-- 10 is a partial front view and partial axial sectional view of the additional coupling means with modified biasing means for the end of the hose, FIG.
1 is a partial axial sectional view of a first embodiment of the coupling shown in FIG. 10; FIG. 12 is a partial axial sectional view of a second embodiment of the coupling shown in FIG. 10; FIG. 10 is an enlarged partial axial sectional view of the third embodiment shown in FIG. 10; FIG. 14 is a front view of the coupling of FIG. 13 on a reduced scale;
5 is a front view of an embodiment of the structure within the dot-dash line circle X in FIG. 13, and FIG. 16 is a partial axial sectional view of the coupling shown in FIG. 10, further modified and enlarged. DESCRIPTION OF SYMBOLS 1, 4... Conduit, 2, 2a-2d... Tubular connector, 3, 3a-3c... Nipple, 5, 6, 6... Section, 7, 7... Annular seal, 9... Internal elastic lip, 10, 15... Termination Part, 12, 12, 1
5, 15, 15, 35... Rear end portion, 13, 13... Elastic pallet, 14, 14... Intermediate portion, 16... Teeth, 1
7, 17, 29...rib, 20...flank, 21...
Internal flank, 22...front flank, 23...inner side,
24, 25a to 24f...Sleeve, 25...Prong, 26...Slot, 27...Protrusion, 28, 32
...Ring, 30, 30a-30c...Color, 34
...Internal rib, 38... Mandrel, 39... Basket, 40...
Window, 48...stopper, 52...opening.

Claims (1)

Claims: 1. Used by a first conduit 1 comprising a deformable first end 10 having an outer surface and a second conduit 4 having a second end 3 having an external projection 17 In a coupling, a tubular connector 2 comprising a first section 5 extending to said second end 3 and a second section 6 having an inner surface formed to surround said outer surface of said first end 10. provided on the tubular connector 2 and releasably engaged with the outer protrusion 17 to connect the second terminal end 3;
said first section 5 against withdrawal from the
at least one elastic pallet 13 holding
and biasing means 24, 28 for biasing the first end 10 to maintain the outer surface 10 in engagement with the inner surface, the biasing means 24, 28 being deformable. a ring 28 of elastic prongs 25 and slots 26 alternating with the prongs 25, said prongs 25 having a projection 27 deformably engaging said first end 10; When the outer surface of the termination portion 10 is surrounded by the inner surface, it is surrounded by the first termination portion 10, and the biasing means 24, 28 further include the ring 2.
8 and said first terminal end 10
A coupling characterized in that it comprises a ring 28 formed to press said prongs 25 against said ring 28. 2. The coupling according to claim 1, further comprising an annular sealing means 7 arranged between the second end 3 and the first section 5. cutlet ring. 3. The coupling according to claim 1, wherein the biasing means 24, 28 confine the first end 10 in a radially expanded state and the radially expandable sleeve 24.
A cup ring characterized by having. 4. A coupling according to claim 1, wherein said first section 5 and said second end 3 define an annular space, and further comprising an annular sealing means 7 in said annular space, said first section 5 and said second end 3 defining an annular space; Coupling characterized in that the elastic pallet 13 is integral with the second section 6 of the tubular connector. 5. A coupling according to claim 1, characterized in that the first section 5 is fixed to the first end 10. 6. A coupling according to claim 4, characterized in that the first end 10 is glued to the first section 5. 7. A coupling according to claim 6, characterized in that said first end 10 and said first section 5 comprise a thermoset plastic material. 8. The coupling according to claim 6, wherein the first end 10 is fixed to the first end 10 by adhesive. 9. Coupling according to claim 1, characterized in that the first end 10 is received by the second section 6 in a radially compressed state. 10. The coupling according to claim 1, wherein the second section 6 has a terminal end 12 remote from the first section 5,
and a coupling characterized in that it is integral with the elastic pallet 13. 11. In the coupling according to claim 10, the elastic pallet 13 is
an arcuate portion 15 integral with the terminal end of the section 6;
and extends substantially parallel to the axis of the tubular connector 2,
and a second portion (14) having a terminal end with a projection (16) that engages with the outer projection (17). 12. The coupling according to claim 10, wherein the terminal end 12 of the second section 6 is arranged so that the inner surface surrounds the outer surface of the first terminal end 10. Coupling characterized in that it has an annular flange (12) extending radially from the flange (12), said elastic pallet (13) having an arcuate end portion (15) merging with said flange (12). 13. The coupling according to claim 1, wherein the width of the elastic pallet 13 in the circumferential direction of the tubular connector 2 decreases in the direction from the second section 6 to the first section 5. A cutlet ring characterized by: 14. A coupling according to claim 1, wherein the elastic pallet 13 has a portion 14 extending essentially parallel to the axis of the tubular connector 2, the thickness of the portion of the elastic pallet 13 being equal to the thickness of the elastic pallet 13. A coupling characterized in that it decreases in the radial direction of the tubular connector in the direction from the second section 6 to the first section 5. 15. The coupling according to claim 1, wherein the first section 5 has a predetermined inner diameter, and the first end 10 is larger than the inner diameter of the first section 5 in its undeformed state. A cup ring characterized by having an external shape. 16. The coupling according to claim 1, wherein the outer projection 17 comprises a rib 17 extending circumferentially on the second end 3, and the rib 17 extends approximately on the second end 3. A coupling characterized in that it has a flank 20 extending radially and facing away from said first end 10 when said outer surface of said first end 10 is surrounded by said inner surface. 17. A coupling according to claim 16, in which the ribs 17 have at least one passageway 18, and the elastic pallet 13 is inserted into the first section 5 before inserting it into the second section 6. , or before pulling out the first section 5 from the second end 3, the passage 18
A coupling characterized in that it has one protrusion 16 that coincides with the . 18. The coupling according to claim 1, wherein the elastic pallet 13 has teeth 16 arranged to engage the outer protrusion 17, and the elastic pallet 13 has teeth 16 arranged to engage the outer projection 17, and the elastic pallet 13 has teeth 16 arranged to engage the outer projection 17, and A coupling characterized in that it has a front flank 22 that tapers radially outward from the tubular connector 2. 19. The coupling according to claim 1, further comprising annular sealing means 7 arranged between said first section 5 and said second end 3, said sealing means
A coupling characterized in that it has at least one external sealing lip 8 which engages the terminal end 3 of the coupling. 20. The coupling according to claim 1, further comprising an annular sealing means 7 arranged between said first section 5 and said second end, and said annular sealing means 7 A coupling characterized in that it has at least one internal sealing lip 9 which engages the first section 5. 21. In the coupling according to claim 1, the first section 5 is connected to the second section 5.
having a terminal end remote from the first section 6, the biasing means 24, 28 being remote from the first section 5.
A coupling characterized in that it has a radially outwardly extending collar 30 adjacent the terminal end of the coupling. 22. A coupling according to claim 21, characterized in that the collar (30) extends radially outwardly beyond at least part of the first section (5). 23. In the coupling according to claim 1, when the outer surface of the first end portion 10 is surrounded by the inner surface, the prongs 25
A coupling characterized in that it has a plurality of terminating edges 31 extending generally radially inwardly within said first terminating portion 10. 24. The coupling according to claim 23, wherein the terminal ends of the plurality of prongs 25 are provided with a plurality of lugs 27 forming an oblique angle with the axis of the tubular connector 2 in the undeformed state of the prongs 25. A cutlet ring that is characterized by 25. In the coupling according to claim 1, the ring 28 is connected to each slot 26.
A coupling characterized in that it has a plurality of protruding ribs 29 that extend to. 26. In the coupling according to claim 1, the ring 32 is received in the ring 28 in a deformed state and expands when the outer surface of the first end portion 10 is surrounded by the inner surface, A coupling characterized in that it is a resilient slit ring 32 which presses the prongs 25 against the first end 10. 27. A coupling according to claim 26, characterized in that said slit ring 32 has a smooth peripheral surface. 28. In the coupling according to claim 1, the second section 6'
A coupling characterized in that it has a portion 34 extending to the terminal end 3 of the coupling. 29. The coupling according to claim 1, wherein the biasing means 24, 28 are further arranged in a first part 25, 26 surrounded by the first section 5 and in the second end 3. and a second portion 30a having an outer diameter matching or substantially matching the inner diameter of said second end 3, including a radially outwardly extending collar 30a. Features a cutlet ring. 30. The coupling according to claim 29, wherein the first section 5 is connected to the second section 5.
A coupling characterized in that it has a terminal end remote from the first section 6, and said collar 30a has an end face contacting the terminal end of said first section 5. 31. In the coupling according to claim 1, the bias means 24d, 28, 30
b has a sleeve 24d surrounded by the first section 5 and the first terminal end 10 and having a terminal end remote from the second section 4, and further includes the biasing means 24d,
A coupling characterized in that 28, 30b comprises a centering ring 30b which is provided at the terminal end of the sleeve 28d and contacts the second terminal end 3 from within an area adjacent to the first section 5. 32. The coupling according to claim 31, wherein the first section 5 is connected to the second section 5.
A coupling having a terminal end remote from the first section 6, said centering ring 30b having an end face contacting the terminal end of said first section 5. 33. The coupling according to claim 1, in which the biasing means 24, 28 have a sleeve 24d integral with the first section 5 and surrounded by the second end 3. Features a cutlet ring. 34. In the coupling according to claim 1, the second terminal end 3c has an open end;
a first inner surface of a larger diameter adjacent the open end, a second inner surface of a smaller diameter remote from the open end, and extending generally radially between the first inner surface and the second inner surface. an intermediate inner surface, and the first
Coupling characterized in that the section 5 has an external shoulder 11 abutting said sealing means 7. 35. The coupling according to claim 34, wherein the second end portion 3 is located between the second inner surface and the intermediate inner surface and tapers away from the first inner surface. having a first cylindrical surface 23, said first section 5 having a second cylindrical surface substantially complementary to said first cylindrical surface 23 and surrounded by said first cylindrical surface 23; A cup ring characterized by having. 36. A coupling according to claim 1, wherein the second end 3 has an essentially radially outwardly extending external stop 48, and the elastic pallet 13 has a substantially radially outwardly extending stop 48 tangential to the stop. A coupling having inwardly extending teeth 16, said teeth 16 having a first flank 20 in contact with said projection 17 and a second flank 22 in contact with said stop 48. 37. The coupling according to claim 1, wherein the elastic pallet 13' has an elongated portion 1 extending substantially parallel to the axis of the tubular connector 2c.
4', characterized in that the length of the protrusion 17' in the axial direction of the tubular connector 2c is equal or approximately equal to the long portion 14' of the elastic pallet 13'. 38. In the coupling according to claim 1, the elastic pallet 13'
a first part 15' separate from the section 5 and integral with the second section 6; and integral with the first part 14' and integral with the tubular connector 2c.
said first part 15' of said elastic pallet 13 comprises an elongated second part 6 extending substantially parallel to the axis of said part and teeth 16 integral with said part and releasably engaging said protrusion; A coupling characterized in that it has one opening 52 aligned with said tooth 16.