Connector and method of manufacturing a connector

Abstract

The invention provides a connector and a method of manufacturing a connector, the connector comprising: a tubular structure having a first port at a first axial end; an internal passage defined in the tubular structure, the first port being fluidly connected with the internal passage; a first barb feature disposed on an outer circumferential surface of the tubular structure adjacent the first axial end and projecting radially away from the outer circumferential surface; a first collar disposed around and radially spaced apart from at least a portion of the tubular structure, a first gap being defined between the first collar and the outer circumferential surface of the tubular structure; a second collar connected to the outer circumferential surface of the tubular structure and to the first collar, a first opening being defined between the second collar and the first collar; and a plurality of first ribs arranged circumferentially spaced apart from one another on an inner circumferential surface of the first collar, each first rib defining a first edge at least partially with an inner circular end face of the first collar, and the first edge projecting into the first gap.

Description

[0001] This application is a divisional of application number 201980039886.1 (International Application Number PCT / US2019 / 036997) filed on June 13, 2019, having the title “Luer Connector with Tube Retaining Engagement Port.” TECHNICAL FIELD

[0002] The disclosed embodiments relate to medical connectors, and more particularly, to a medical connector having a retention mechanism to prevent a fluid line coupled to the connector from disengaging or separating from the connector due to a reduction in fluid in the fluid line and a stop mechanism to limit the extent of the fluid line in the connector. BACKGROUND

[0003] Medical connectors are widely used in fluid delivery systems, such as those used in connection with intravenous (IV) fluid lines, blood access, hemodialysis, peritoneal dialysis, enteral feeding, drug vial access, and the like. Medical connectors can generally connect two fluid lines or tubes.

[0004] Typically, a medical connector can be a hollow tubular structure that receives a fluid line or tube at one end thereof. The connector provides a flow path for fluid entering from the tube to exit the connector from its opposite end. The presence of fluid in the tube can form an air-tight seal between the outer surface of the tube and the inner surface of the medical connector. This seal can prevent the tube from separating from the medical connector. However, when there is no fluid in the tube or when the amount of fluid in the tube is reduced, the seal can weaken, and the tube can easily separate from the connector, resulting in a “free-flow” leak. SUMMARY

[0005] According to at least some embodiments disclosed herein, it is recognized that a medical connector can not function as intended when there is no fluid in the tube or when the amount of fluid in the tube is reduced. For example, the reduction in the amount of fluid can cause the air-tight seal between the outer surface of the tube and the inner surface of the medical connector to weaken, and the tube can easily separate from the medical connector.

[0006] One aspect of the present disclosure provides a connector comprising: a body having a tube portion and a luer portion axially opposite and connected to the tube portion; an internal passage defined by an inner circumferential surface of the connector, the internal passage extending axially between and fluidly communicating the tube portion and the luer portion; a stop mechanism disposed in the luer portion and configured to limit the extent of a fluid line disposed in the connector; and a retention mechanism disposed in the tube portion, the retention mechanism being axially offset from the stop mechanism and configured to retain the fluid line in the connector.

[0007] Another aspect of the present disclosure provides an assembly comprising a connector having a body having a tubing portion and a luer portion axially opposite the tubing portion and connected to the tubing portion, an internal passageway defined by an inner circumferential surface of the connector, the internal passageway extending axially between the tubing portion and the luer portion and fluidly communicating the tubing portion and the luer portion, a stop mechanism disposed in the luer portion and configured to limit an extent of a fluid line disposed in the connector, and a retention mechanism disposed in the tubing portion and configured to retain the fluid line in the connector. The assembly can further include a first core pin including a first core pin body having a first base portion and a luer-shaped portion connected to one another, wherein a two-lobed profile is defined at a distal end of the first core pin and disposed diametrically opposite one another. The assembly can further include a second core pin including a second core pin body having a second base portion and a tubing-shaped portion connected to one another, wherein a barb profile is defined at a distal end of the second core pin.

[0008] Additional features and advantages of the subject technology will be set forth in the description below, and in part will be apparent from the description, or can be learned by practice of the subject technology. The advantages of the subject technology will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0009] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF DRAWINGS

[0010] The following drawings are included to illustrate certain aspects of the embodiments and are not intended to be exclusive embodiments. The disclosed subject matter can be modified, altered, combined, and / or enhanced in a variety of ways, as will occur to those skilled in the art upon reading the description of the disclosed subject matter herein.

[0011] Figure 1 is a perspective view of a medical connector that can employ the principles of the present disclosure in accordance with the disclosed embodiments.

[0012] Figure 2 is a perspective view of a medical connector that can employ the principles of the present disclosure in accordance with the disclosed embodiments. Figure 1 is a cross-sectional view of the medical connector of

[0013] Figure 3A is a cross-sectional view of the medical connector of Figure 2 including a fluid line inserted therein.

[0014] Figure 3B is a cross-sectional view of the medical connector of Figure 1A cross-sectional view of the connector of

[0015] Figure 4A A connector of Figure 1 and a core pin for forming a tubing profile and a luer profile on an inner circumferential surface of the connector are shown.

[0016] Figure 4B A distal end of the core pin of Figure 4A is shown as viewed in the direction of arrow C and includes two lugs forming profiles.

[0017] Figure 4C A perspective view of a distal end of a tubing forming portion of the core pin of Figure 4A is shown.

[0018] Figure 5A The core pins of Figure 4A are shown in contact with each other at respective distal ends.

[0019] Figure 5B A cross-sectional view of the connector of Figure 2 is shown including the core pins of Figure 4A disposed therein.

[0020] Figure 5C A cross-sectional view of the connector of Figure 2 is shown with the core pins disposed outside of the connector.

[0021] Figure 5D A perspective view of the connector of Figure 1 is shown in dashed lines including the core pins of Figure 4A in contact with each other therein.

[0022] Figure 6A A perspective view of a medical connector that can employ the principles of the present disclosure in accordance with the disclosed embodiments is shown.

[0023] Figure 6B A cross-sectional view of the medical connector of Figure 6A is shown.

[0024] Figure 6C A partial cross-sectional view of the connector of Figure 6A in accordance with the disclosed embodiments is shown including a fluid line coupled to the second port.

[0025] Figure 7A A perspective view of a medical connector that can employ the principles of the present disclosure in accordance with the disclosed embodiments is shown.

[0026] Figure 7B A cross-sectional view of the medical connector of Figure 7A is shown.

[0027] Figure 7Ca fluid line coupled to Figure 7A a connector.

[0028] Figure 7D a partial cutaway view of a connector. Figure 7A DETAILED DESCRIPTION

[0029] The disclosed embodiments relate to a connector having a retention mechanism for preventing a fluid line coupled to the connector from decoupling and / or detaching from the connector in the absence (or reduction) of fluid in the fluid line and a stop mechanism for limiting the extent of the fluid line in the connector. As disclosed herein, the retention mechanism can include a barb fitting, a barbed edge, or similar structure that can retain the fluid line. As a result of the interference fit between the fluid line and the connector, the retention mechanism ensures that a seal is maintained between the fluid line and an inner surface of the connector in low pressure conditions (e.g., in the absence of fluid in the fluid line). As a result, a relatively strong pulling force needs to be exerted on the fluid line in order to detach or decouple the fluid line from the connector. Thus, accidental detachment of the fluid line is minimized.

[0030] The stop mechanism can include one or more lugs on an inner surface of the connector that limit the extent of the fluid line in the connector when the fluid line is inserted into the connector. As described below, the connector includes a female luer fitting at an end opposite the end that receives the end of the fluid line. The stop mechanism prevents the fluid line from extending into the female luer fitting during assembly, thereby ensuring proper operation of the medical connector.

[0031] Another advantage of the medical connector according to the disclosed embodiments is that the manufacturing cost of the medical connector is not significantly increased. Existing manufacturing equipment can be modified at minimal cost to manufacture the exemplary medical connector. For example, the core pin of an injection molding equipment used to manufacture the medical connector can be redesigned to produce the stop mechanism and the retention mechanism.

[0032] As used herein, the term “fluid line” and any variations thereof refers to a medical line or tubing used to deliver a liquid, solvent, or fluid (including a gas) to or from a patient receiving medical care. For example, the fluid line can be used for intravenous (IV) delivery of a fluid, fluid removal, oxygen delivery, combinations thereof, and the like.

[0033] As used herein, the terms “medical connector,” “connector,” and any variations thereof refer to any device for providing a fluid flow path between two or more fluid lines coupled thereto. For example, the medical connector can be or include a Y-site bag or other type of connector.

[0034] ​Figure 1 An isometric view of a medical connector 100 that can employ the principles of the present disclosure in accordance with the disclosed embodiments is shown. As shown, the medical connector (or simply, connector) can include a generally cylindrical body 101 having a "first" or tubing portion 103 and a "second" or luer portion 105 axially opposite and connected with the tubing portion 103. The body 101 also includes two handles 107 disposed on an outer surface of the body 101. While two handles 107 are shown, the number of handles can be increased or decreased as desired. The tubing portion 103 includes a tubing port 109 sized and shaped or otherwise configured to receive a fluid line, as described below. The luer portion 105 includes a luer port 111 sized and shaped or otherwise configured to receive a male luer connector. A flange 106 can be disposed at or near the luer port 111. Another flange (not shown) can also be disposed at or near the tubing port 109. The body 101 defines an internal longitudinal channel or passageway 113 that extends from the tubing port 109 to the luer port 111 and fluidly connects the tubing port 109 and the luer port 111 with one another.

[0035] Figure 2 is a cross-sectional view of the connector 100 in accordance with the disclosed embodiments. As shown, the channel 113 is defined by an inner circumferential surface 115 of the body 101 and is continuous from the tubing port 109 to the luer port 111. The inner circumferential surface 115 in the tubing portion 103 and the luer portion 105 has two dissimilar profiles. Specifically, the inner circumferential surface 115 in the tubing portion 103 has a tubing profile 117 and the inner circumferential surface 115 in the luer portion 105 has a luer profile 119 (or luer taper). The tubing profile 117, and thus the tubing portion 103 of the connector 100, is sized and shaped (or otherwise configured) to receive a fluid line. The luer profile 119, and thus the luer portion 105 of the connector 100, is sized and shaped (or otherwise configured) to receive a standard male luer fitting. The luer profile 119, and thus the luer portion 105, conforms to ISO-594.

[0036] During assembly, to limit the extent of a fluid line inserted, advanced or otherwise "slid" into the connector 100, the inner circumferential surface 115 can define a stop mechanism. In one example, and as shown, the stop mechanism can be or include one or more (preferably two) lugs 121 Figure 2The inner circumferential surface 115 can include one or more protrusions (or extensions) that protrude (or otherwise extend) radially inward from the inner circumferential surface 115 and are circumferentially spaced apart from one another (e.g., as shown in FIG. 1). In some embodiments having a plurality of protrusions 121, the protrusions can be positioned in the channel 113 diametrically opposite one another (spaced 180° apart). In embodiments having more than two protrusions 121, the protrusions can be evenly distributed circumferentially around the inner surface 115. In these embodiments, the even distribution can provide an even distribution of force around a pipe inserted into the connector. In some embodiments, the protrusions 121 can be asymmetrically distributed around the inner surface 115. The protrusions 121 can not be limited to any particular shape or size, so long as the protrusions 121 prevent the extent of a fluid line inserted into the connector 100. In one example, the protrusions 121 extend into the channel 113 a maximum distance that is less than or equal to the thickness of the fluid line 151. This prevents the protrusions 121 from obstructing the fluid passage of the fluid line inserted into the connector 100.

[0037] In addition, the inner circumferential surface 115 can also include a retention mechanism to improve the ability of the connector 100 to retain a fluid line inserted therein, thereby preventing the fluid line from being decoupled (or otherwise disengaged) from the connector 100 during periods of low pressure in the fluid line due to a reduction in fluid in the fluid line. In one example, and as shown, the retention mechanism can be or include two barb features (or barb fittings) 123 disposed diametrically opposite one another on the inner circumferential surface 115 and in the pipe portion 103. In one example, and as shown, the barb features 123 can be disposed at or near the boundary between the pipe portion and the luer portion 105. Each barb feature 123 can extend a distance radially inward from the inner circumferential surface 115 into the channel 113. In one example, the barb features 123 can be spike-like structures extending from the inner circumferential surface 115. However, in other embodiments, the barb features 123 can be ridges or other similar structures that increase the friction between the fluid line and the inner circumferential surface 115 such that the fluid line does not easily disengage from the connector 100 without departing from the scope of the present disclosure. In some embodiments, the barb features 123 can be configured as ramps with a slight undercut configured to slightly compress the fluid line as it is inserted or advanced into the connector, and the top of the ramp (in some embodiments, the undercut portion) will secure the fluid line within the connector when the fluid line is pulled to be withdrawn from the connector. In some embodiments, the top of the ramp or undercut portion will poke into the pipe when attempting to withdraw the pipe from within the connector, as explained further below.

[0038] Figure 3A is Figure 2 The connector 100 in FIG. 1 includes a cross-sectional view of a fluid line 151 inserted therein. Figure 3B isFigure 1 FIG. 2 is a cross-sectional view of the connector of FIG. 1 including a fluid line 151 inserted therein. Referring to Figure 3A and Figure 3B , with continued reference to Figure 1 and Figure 2 , the fluid line 151 can be inserted into the connector 100 generally in the direction of arrow A, and each barb feature 123 can have a tapered distal end 125 oriented generally in the direction of insertion of the fluid line 151 into the connector 100. The fluid line 151 can be relatively easily inserted into the connector 100. However, when a pulling force (indicated by the direction of arrow B) is applied to the fluid line 151 to remove it from the connector 100, the barb structure 123 can increase the friction between the connector 100 and the fluid line 151. As a result, the pulling force required to remove or otherwise disengage the fluid line 151 from the connector 100 is increased, and thus the fluid line 151 is better secured in the connector 100. In addition, fluid in the fluid line 151 can exert a pressure in a radially outward direction, which can further increase the friction between the fluid line 151 and the barb features 123.

[0039] When the fluid line 151 is inserted into the connector 100, the fluid line 151 contacts the ledge 121 after passing over the barb features 123. As a result, the extent of the fluid line 151 in the connector 100 is limited, and the fluid line 151 is prevented from entering the luer portion 105. In some embodiments, the ledge 121 and the barb features 123 are slightly spaced apart, such that the fluid line 151 passes over the barb features 123, and further advancement will cause them to contact the ledge 121. Thus, the tubing portion 103 including the tubing profile 117 can extend between the ledge 121 and the tubing port 109, and the luer portion 105 including the luer profile 119 can extend between the luer port 111 and the ledge 121.

[0040] It should be noted that Figure 3A and Figure 3B the positions of the ledge 121 and the barb features 123 on the inner circumferential surface 115 in Figure 2 , Figure 3A and Figure 3BTwo lugs 121 and two barb features 123 are shown, but the number of lugs and barb features is not limited thereto and can be increased or decreased without departing from the scope of the present disclosure. In an example, a plurality of lugs 121 can be disposed at regular intervals along the inner circumferential surface 115. However, in other embodiments, the lugs 121 can be disposed at irregular intervals along the inner circumferential surface 115. Similarly, a plurality of barb features 123 can be disposed at regular intervals along the inner circumferential surface 115. However, in other embodiments, the barb features 123 can be disposed at irregular intervals. The circumferential extent of the barb features 123 can be about one quarter of a quadrant of the inner circumferential surface. However, in other examples, the circumferential extent of the barb features 123 can be increased or decreased as needed for the application or design without departing from the scope of the present disclosure.

[0041] In an example, the connector 100 can be manufactured utilizing an injection molding process. However, other manufacturing processes can be utilized to manufacture the connector 100 without departing from the scope of the present disclosure. Figure 4A The connector 100 is shown along with core pins 401 and 403 for forming the pipe profile 117 and the luer profile 119 of the inner circumferential surface 115. In an example, the core pin 401 can form the luer profile 119 of the inner circumferential surface 115 and the core pin 403 can form the pipe profile 117 of the inner circumferential surface 115. Machining steps and molds for forming features on the outer surface of the body 101 (e.g., the handle 107) are omitted for brevity.

[0042] Referring to Figure 4A The core pin 401 has a generally elongated body 402 having a base portion 406 and a luer-forming portion 408. The base portion 406 has a generally cylindrical outer surface 412 having a diameter that is greater than the maximum diameter of the luer-forming portion 408. The luer-forming portion 408 has an outer surface 413 shaped to form the luer profile 119 Figure 2 One or more lug-forming profiles 410 can be formed on the outer surface 413 proximate the distal end 411 of the luer-forming portion 408. In Figure 4A The core pin 401 has two lug-forming profiles 410 (one hidden from view in the drawing) formed diametrically opposite one another at the distal end 411.

[0043] Referring briefly to Figure 4B A front view (or elevation view) of the core pin 401 according to the disclosed embodiments is shown and the two lug-forming profiles 410 are shown in greater detail. As shown, the lug-forming profiles 410 are formed (or otherwise defined) in the outer surface 413 proximate the distal end 411 of the core pin 401. While Figure 4BThe core pin 401 is shown having two lug-forming profiles 410 formed radially opposite one another at the distal end 411, but in other examples, the number and location of the lug-forming profiles can be increased or decreased depending on the number of lug and barb features to be formed in the connector 100 without departing from the scope of the present disclosure.

[0044] Each lug-forming profile 410 includes a first flat surface 415 and a second flat surface 417 each formed (or otherwise defined) in the outer surface 413. The first flat surface 415 extends axially at a first angle φ1 for a distance D1 relative to an axis X of the assembly including the connector 100 and the core pins 401 and 403. The second flat surface 417 extends axially at a second angle φ2 for a distance D2 relative to the axis X and extends from the first flat surface 415 to the distal end 411. It should be noted that when assembled, the respective axes of the core pins 401 and 403 and the connector 100 coincide with the axis X. In an example, and as shown, the first angle φ1 is greater than the second angle φ2. As discussed further below, the shape and size of the lugs 121 of the connector 100 can be based at least in part on the first angle φ1 and the first flat surface 415. The distal end 411 can include a transverse end surface 418 disposed perpendicular to the axis X and connected to the second flat surface 417.

[0045] Returning to Figure 4A , the core pin 403 also has a generally elongated body 422 including a base portion 426 having a cylindrical outer surface 432 and a pipe-forming portion 428 having a cylindrical outer surface 433. The diameter of the base portion 426 is greater than the diameter of the pipe-forming portion 428. The cylindrical outer surface 433 is shaped and sized to the pipe profile 117 of the pipe portion 103. Figure 2 ).

[0046] Figure 4CThe distal end 421 of the tubing-forming portion 428 of the core pin 403 is shown in greater detail. As shown, at the distal end 421, the tubing-forming portion 428 can include a barb-forming profile 419 that includes two axially extending prongs 425 and a cavity (or generally concave cutout) 423 defined between the two prongs 425. The cavity 423 can be defined by a flat bottom surface 427 disposed perpendicular to the axis X and angled inner surfaces 429 of the prongs 425. As shown, the inner surfaces 429 are angled relative to the axis X. Two beveled edges 431 (one hidden from view) can be defined between the flat bottom surface 427 and a cylindrical outer surface 432 and can be disposed at radially opposite ends of the tubing-forming portion 428. Each beveled edge 431 can extend axially a distance D3 between the flat bottom surface 427 and the cylindrical outer surface 433. An angle φ3 can be defined between each beveled edge 431 and the flat bottom surface 427. The angle φ3 and the distance D3 can at least partially determine the radial extent of the barb feature 123 in the channel 113 of the connector 100.

[0047] Figure 5A The core pins 401 and 403 are shown in contact with one another at their respective distal ends 411 and 421. For illustrative purposes, the core pins 401 and 403 are shown rotated 90° from their positions in Figure 4A and Figure 5A the connector 100 is omitted. In an example, the connector 100 Figures 1-3B may be manufactured using an injection molding process. The connector 100 can be made of plastic or a similar material that can be molded into a desired shape. External features of the connector 100 can be formed using an external mold (not shown). These external features can include the handle 107, the flange 106, and the outer surface of the cylindrical body 101. The channel 113, the tubing profile 117, the luer profile 119, the lugs 121, and the barb feature 123 can be formed using the core pins 401 and 403.

[0048] During manufacturing, the material that forms the connector 100 can be placed in a molding tool that includes the core pins 401 and 403 axially aligned with one another. The core pins 401 and 403 can enter the material together from axially opposite ends. The material can be in a semi-solid malleable state so that it can be molded into a desired shape. The core pins 401 and 403 can be brought closer to one another until the core pins 401 and 403 are closed against one another as Figure 5A shown.

[0049] When the core pins 401 and 403 are closed against each other, the distal end 411 of the core pin 401 is received in the distal end 421 of the core pin 403. More specifically, the distal end 411 including the lug-forming profile 410 is received in the cavity 423 of the barb-forming profile 419 such that the transverse end surface 418 contacts (or closes against) the flat bottom surface 427 and the angled inner surface 429 of the prong 425 contacts the second flat surface 417. The lug-forming profile 410 and the barb-forming profile 419 collectively form a stop mechanism and a retention mechanism. Specifically, when the core pins 401 and 403 are closed against each other, two cavities 451 (one shown) are formed (or otherwise defined) by the first flat surface 415 and the prong 425 and two cavities 453 (one shown) are formed by the luer-forming portion 408 and the beveled edge 431. The material of the connector 100 in the cavities 451 forms the lug 121 and the material in the cavities 453 forms the barb feature 123.

[0050] Figure 5B is a cutaway view of the connector 100 including the core pins 401 and 403 in contact with each other. As shown, when the core pins 401 and 403 are closed against each other, the base portion 406 can contact the opening of the luer port 111 and the base portion 426 can contact the opening of the tubing port 109. According to the disclosed embodiments, the lugs 121 can be similar to each other, e.g., in shape and size. Likewise, the barb features 123 can be similar to each other, e.g., in shape and size. However, in other embodiments, the lugs 121 can be different from each other and the barb features 123 can be different from each other.

[0051] Figure 5C is a cutaway view of the connector 100 and the core pins 401 and 403 separated from each other. Figure 5C Similar to Figure 5B , except that the core pins 401 and 403 are shown outside of the connector 100. For illustrative purposes, the portion of the inner circumferential surface 115 including the tubing profile 117 and the portion of the inner circumferential surface 115 including the luer profile 119 are depicted as the core pins 401 and 403 forming the tubing profile 117 and the luer profile 119.

[0052] Figure 5D is a perspective view of the connector of Figure 1 (shown in dashed lines) including the core pins in Figure 4A in contact with each other therein.

[0053] According to the above-disclosed embodiments, the connector 100 includes two radially-opposed lugs 121 and two radially-opposed barb features 123 formed therein. The lugs 121 and the barb features 123 do not overlap each other in the radial direction.

[0054] In other embodiments, the connector 100 can include a single lug and a single barb feature extending along the inner circumferential surface 115. In this case, the single lug can extend between about 180° to about 270° along the inner circumferential surface 115, and the single barb feature can extend the remaining portion of the inner circumferential surface 115. Alternatively, the single barb feature can extend about 180° to 270° along the inner circumferential surface 115, and the single lug can extend the remaining portion of the inner circumferential surface 115. In each case, the single lug and the single barb feature can also not overlap each other in the radial direction.

[0055] In still other embodiments, the connector can include a single lug and a plurality of barb features. In alternative embodiments, the connector can include a plurality of lugs and a single barb feature. In both cases, the lugs and the barb features can not overlap each other in the radial direction.

[0056] For proper operation of the connector 100, at least one lug 121 and at least one barb feature 123 are required. For example, if the connector 100 does not include a barb feature 123, then although the extent of the tubing in the connector 100 can be limited, the tubing can easily disengage or separate from the connector 100. Similarly, if the connector 100 does not include a lug 121, then although the tubing can remain in the connector 100 under low fluid pressure conditions, the extent of the tubing in the connector 100 can not be limited, and the tubing can enter the luer portion 105 of the connector 100 and block the male luer fitting located in the luer portion 105.

[0057] In each of the embodiments described above, the lugs 121 and the barb features 123 are axially offset or separated from each other. The offset or separation between the lugs 121 and the barb features 123 is not limited to any particular distance. The advantage of this arrangement is that when the tubing passes the barb features 123, the tubing is less likely to extend beyond the lugs 121. This is because the barb features 123 "pinch" the tubing, and as the tubing passes the barb features 123, the tubing protrudes radially outward toward the inner circumferential surface 115 and increases the likelihood that the tubing will contact the lugs 121.

[0058] In one example, the barb features 123 can have a greater circumferential extent (or circumferential width) than the lugs 121. However, in other embodiments, the barb features 123 and the lugs 121 can have the same circumferential extent.

[0059] Figure 6A is a perspective view of a medical connector 600 that can employ the principles of the present disclosure in accordance with the disclosed embodiments. Figure 6B A cross-sectional view of the medical connector 600 is shown. Referring to Figure 6A andFigure 6B The medical connector 600 can include a tubular structure 601 (or simply, a tube) having a first port 602 at a first end 603 and a second port 604 at a second end 605 longitudinally opposite the first end 603. The tube 601 defines an internal longitudinal channel or passageway 607 extending from the first port 602 to the second port 604 and fluidly connecting the first and second ports 602, 604 to one another. A central collar 608 can be disposed about the tube 601 and can be connected to an outer circumferential surface 609 of the tube 601. Although the central collar 608 is shown disposed midway along the tube 601, the central collar 608 can be located at any desired location along the tube. Moreover, in other examples, the tube 601 can include more than one central collar.

[0060] A first cylindrical collar 610 can be disposed about the tube 601 at the first end 603 and can be connected to the central collar 608 via connectors 611 and 613 extending between the central collar 608 and an inner circular end face 626 of the first cylindrical collar 610. The first cylindrical collar 610 can be radially spaced from the tube 601 such that a radially and axially extending gap 618 can be defined between an inner circumferential surface 620 of the first cylindrical collar 610 and an outer circumferential surface 609 of the tube 601. Similarly, a second cylindrical collar 612 can be disposed about the tube 601 at the second end 605 and can be connected to the central collar 608 via connectors 615 and 617 extending between the central collar 608 and an inner circular end face 628 of the second cylindrical collar 612. The second cylindrical collar 612 can be radially spaced from the tube 601 such that a radially and axially extending gap 622 can be defined between an inner circumferential surface 624 of the second cylindrical collar 612 and the outer circumferential surface 609 of the tube 601.

[0061] A plurality of ribs 640 can be arranged circumferentially spaced apart from one another on the inner circumferential surface 620 of the first collar 610. The ribs 640 can be tapered and can extend axially along the inner circumferential surface 620 a distance from the inner circular end surface 626. For example, the ribs 640 can be wider at an end that contacts the inner circular end surface 626 and can taper axially along the inner circumferential surface 620 in the direction of the first port 602. Each rib 640 can define an edge 629 with the inner circular end surface 626 that can protrude into the gap 618. The outer circumferential surface 609 can include a first barb feature 630 near the first end 603 that can protrude radially outward from the outer circumferential surface 609 into the gap 618 and extend circularly on the outer circumferential surface 609. In an embodiment, and as shown, the first barb feature 630 can be axially aligned with the edges 629 of the plurality of ribs 640. However, in other embodiments, the first barb feature 630 can be axially offset from the edges 629 without departing from the scope of the present disclosure.

[0062] A plurality of ribs 642 can be arranged circumferentially spaced apart from one another on the inner circumferential surface 624 of the second collar 612. The ribs 642 can be tapered and can extend axially along the inner circumferential surface 624 a distance from the inner circular end surface 628. For example, the ribs 642 can be wider at an end that contacts the inner circular end surface 628 and can taper axially along the inner circumferential surface 624 in the direction of the second port 604. Each rib 642 can define an edge 631 with the inner circular end surface 628 that can protrude into the gap 622. The outer circumferential surface 609 can include a second barb feature 632 near the second end 605 that can protrude radially outward from the outer circumferential surface 609 into the gap 622 and extend circularly on the outer circumferential surface 609. In an embodiment, and as shown, the second barb feature 632 can be axially aligned with the edges 631 of the plurality of ribs 642. However, in other embodiments, the second barb feature 632 can be axially offset from the edges 631 without departing from the scope of the present disclosure. The ribs 640 and 642 facilitate relatively easy insertion of a fluid line onto the fitting 601 and also allow fluid lines of different wall thicknesses to be coupled to the connector 600. In an embodiment, the ribs 640 and 642 can be arranged at regular intervals along the respective inner circumferential surfaces 620 and 624. However, in other embodiments, the ribs 640 and 642 can be arranged at irregular intervals without departing from the scope of the present disclosure.

[0063] The first collar 610 can be axially spaced from the center collar 608, and an opening 635 can be defined between the first collar 610 and the center collar 608. Likewise, the second collar 612 can be axially spaced from the center collar 608, and an opening 637 can be defined between the second collar 612 and the center collar 608. The openings 635 and 637 can be through openings such that the tube 601 can be seen via the openings 635 and 637.

[0064] Figure 6C is a partial cross-sectional view of the connector 600 according to the disclosed embodiments, including a fluid line 151 coupled to the second port 604. The fluid line 151 can be coupled by sliding (or "slipping") the fluid line 151 over the tube 601 in the direction of the center collar 608. When sliding, the fluid line 151 can be pushed past and beyond the barb feature 632. The hydrostatic pressure caused by the fluid in the fluid line 151 can cause the fluid line 151 to expand, and thus disengage or slip off of the tube 601. The barb feature 632 and the rim 631 can contact the outer surface of the fluid line 151, thereby creating an interference fit between the fluid line 151 and the connector 600. As a result, a relatively strong pulling force is required to separate or disengage the fluid line 151 from the connector 600, and the fluid line 151 can not easily disengage due to the presence of the fluid. Thus, accidental disengagement of the fluid line 151 is minimized. The center collar 608 can prevent further axial movement of the fluid line 151 over the tube 601. The opening 637 can provide a visual indication of the extent of the fluid line 151 over the tube 601. The fluid line can be coupled to the first port 602 in a similar manner, and explanation thereof is omitted for brevity.

[0065] In an embodiment, a solvent can be optionally applied to the tube 601 to allow the fluid line 151 to be relatively easily inserted over the tube 601. For example, the solvent can be applied to the tube 601 between the barb feature 630 and the first port 602 and between the barb feature 632 and the second port 604. The solvent can be applied by immersing the connector 600 in a custom designed fixture that applies the solvent.

[0066] In an embodiment, the fluid line 151 can be coupled to the connector 600 with heat staking. In this case, no solvent can be used. Heat staking can cause the fluid line 151 to adhere to and shrink over the tube 601.

[0067] Figure 7A is a perspective view of a medical connector 700 that can employ the principles of the present disclosure according to the disclosed embodiments. Figure 7B A cross-sectional view of the medical connector 700 is shown. The medical connector 700 can be similar in certain respects to the medical connector 600 is a perspective view of a medical connector 700 that can employ the principles of the present disclosure according to the disclosed embodiments.Figures 6A-6C The medical connector 600, and therefore best understood by reference, wherein the same numbers represent the same components, which will not be described again. As shown in the figure, the structure of connector 700 can be similar to... Figure 6A and Figure 6B The structure of connector 600 to the right of the central collar 608.

[0068] In connector 700, the central collar 608 and the first collar 610 may be omitted, and connector 700 may alternatively include a third cylindrical collar 710 disposed around and partially surrounding the tube 701. The third collar 710 may be coupled to the outer circumferential surface 609 of the tube 601 via a circular end wall 724. The distal end 723 of the third collar 710, opposite the circular end wall 724 and adjacent to the first port 602, may not be connected to the tube 701. The tube 701 may include a first portion extending between the first port 602 and the circular end wall 724. The outer circumferential surface 709 of the tube 701 in the first portion may have a Luer profile (compliant with ISO-594).

[0069] In one embodiment, and as shown, the fitting 701 may extend a certain distance beyond the distal end 723. However, in other embodiments, the port 602 and the distal end 723 may be axially aligned without departing from the scope of this disclosure.

[0070] The inner circumferential surface 720 of the third ring 710 may include a plurality of threads 712 disposed along and projecting radially inward from the inner circumferential surface 720. When coupled together, the threads 712 may engage corresponding threads on a female Luer connector (or other profile).

[0071] The fitting 701 may include a second portion extending between the second port 604 and the circular end wall 724. The outer circumferential surface 709 of the fitting 701 may define an introduction tapered profile 715 at the second port 604. The introduction tapered profile 715 allows fluid conduit 151 ( Figure 7C The tapered profile 715 is inserted because the distal end of the tapered profile 715 has a diameter smaller than the inner diameter of the fluid line 151.

[0072] As shown in the figure, channel 607 extends from port 602 to port 604, fluidly connecting ports 602 and 604 to each other. In one embodiment, and as shown, the inner diameter of channel 607 in the first portion may be larger than the inner diameter of channel 607 in the second portion. However, in other embodiments, the inner diameter of channel 607 in the first portion may be smaller than the inner diameter of channel 607 in the second portion. In still other embodiments, the inner diameter of channel 607 in the first portion may be the same as the inner diameter of channel 607 in the second portion.

[0073] Figure 7C A fluid line 151 is shown coupled to the connector 700. As shown, the fitting 701 is inserted into the fluid line 151 such that the fluid line passes over and beyond the second barb feature 632 and the edge 631. Figure 7D A partial cutaway view of the connector 700 is shown.

[0074] Referring to Figures 6A-6C and Figures 7A-7C the skilled person will appreciate that the fitting 601 can have a luer profile at one or both ends 603 or 605. Figures 6A-6C

[0075] The subject technology is described as a series of clauses

[0076] For convenience, the various examples of aspects of the present disclosure are described as numbered clauses (1, 2, 3, etc.). These are provided as examples only and are not intended to limit the subject technology. Identification of the various examples of aspects of the present disclosure as numbered clauses (1, 2, 3, etc.) is not intended to correspond to priority in claims. The identification of the various examples of aspects of the present disclosure as numbered clauses (1, 2, 3, etc.) is provided merely as a convenience for referring to the various examples of aspects of the present disclosure.

[0077] Clause 1 : A connector comprising: a body having a tubing portion and a luer portion axially opposite and connected to the tubing portion; an internal passageway defined by an inner circumferential surface of the connector, the passageway extending axially between the tubing portion and the luer portion and fluidly communicating the tubing portion and the luer portion; a stop mechanism disposed in the luer portion and configured to limit an extent of a fluid line disposed in the connector; and a retention mechanism disposed in the tubing portion, the retention mechanism being axially offset from the stop mechanism and configured to retain the fluid line in the connector.

[0078] Clause 2: The connector of clause 1, wherein the inner circumferential surface comprises a tubing profile in the tubing portion and a luer profile in the luer portion.

[0079] Clause 3: The connector of clause 1, wherein the tubing portion comprises a tubing port configured to receive the fluid line and the luer portion comprises a luer port configured to receive a male luer connector, the tubing port and the luer port being in fluid communication through the internal passageway.

[0080] Clause 4: The connector of clause 1, wherein the stop mechanism comprises one or more lugs projecting radially inward from the inner circumferential surface.

[0081] Clause 5: The connector of clause 4, wherein the stop mechanism comprises two lugs disposed diametrically opposite one another.

[0082] ​Clause 6: The connector of clause 1, wherein the retention mechanism comprises one or more barb features extending radially inward from the inner circumferential surface.

[0083] Clause 7: The connector of clause 4, wherein the retention mechanism comprises two barb features disposed diametrically opposite one another.

[0084] Clause 8: An assembly comprising a connector, a first pin, and a second pin, wherein the connector comprises: a body having a tubing portion and a luer portion axially opposite and connected to the tubing portion; an internal passageway defined by an inner circumferential surface of the connector, the passageway extending axially between and fluidly communicating the tubing portion and the luer portion; a stop mechanism disposed in the luer portion and configured to limit an extent of a fluid line disposed in the connector; and a retention mechanism disposed in the tubing portion and configured to retain the fluid line in the connector. The first pin comprises a first pin body having a first base portion and a luer-shaped portion connected to one another, wherein two lug-forming profiles are defined at a distal end of the first pin and disposed diametrically opposite one another. The second pin comprises a second pin body having a second base portion and a tubing-shaped portion connected to one another, wherein a barb-forming profile is defined at a distal end of the second pin.

[0085] Clause 9: The assembly of clause 8, wherein each lug-forming profile comprises a first flat surface and a second flat surface, each flat surface formed on an outer surface of the first pin, the first flat surface extending axially a first distance and at a first angle relative to an axis of the assembly, and the second flat surface extending axially a second distance from the first flat surface to the distal end and at a second angle relative to the axis of the assembly, the first angle and the second angle being different.

[0086] Clause 10: The assembly of clause 8, wherein the barb-forming profile comprises: two axially extending prongs and a cavity defined therebetween, the cavity defined by a flat bottom surface of the pin disposed at the distal end of the second pin perpendicular to the axis of the assembly and an angled inner surface of each prong; and two chamfered edges disposed diametrically opposite one another, each chamfered edge defined between the flat bottom surface and an outer surface of the second pin.

[0087] Clause 11: The assembly of clause 8, wherein the lug-forming profile and the barb-forming profile collectively form the stop mechanism and the retention mechanism.

[0088] Clause 12: The assembly of clause 8, wherein the luer-shaped portion at least partially defines the luer portion of the connector, and the tubing-shaped portion at least partially defines the tubing portion of the connector.

[0089] Clause 13: A method of manufacturing a connector, comprising: providing a first core pin and a second core pin, the first core pin comprising a first core pin body having a first base portion and a luer-shaped portion connected to one another, wherein two lug-forming profiles are defined at a distal end of the first core pin and disposed diametrically opposite one another, and the second core pin comprising a second core pin body having a second base portion and a tubing-shaped portion connected to one another, wherein a barb-forming profile is defined at a distal end of the second core pin; inserting the first core pin and the second core pin into a material forming the connector, the first core pin and the second core pin being axially aligned and inserted into the material from opposite ends; and bringing the distal ends of the first core pin and the second core pin into contact with one another such that the lug-forming profiles are at least partially received in the barb-forming profile.

[0090] Clause 14: The method of clause 13, wherein the connector formed by bringing the distal ends of the first core pin and the second core pin into contact comprises: a tubing portion and a luer portion axially opposite and connected to the tubing portion; an internal passageway defined by an inner circumferential surface of the connector, the passageway extending axially between the tubing portion and the luer portion and fluidly communicating the tubing portion and the luer portion; a stop mechanism disposed in the luer portion and configured to limit an extent of extension of a fluid line disposed in the connector; and a retention mechanism disposed in the tubing portion and configured to retain the fluid line in the connector.

[0091] Clause 15: The method of clause 14, wherein each lug-forming profile comprises a first flat surface and a second flat surface, each flat surface formed on an outer surface of the first core pin, the first flat surface extending axially a first distance and at a first angle relative to an axis of the assembly, and the second flat surface extending axially a second distance from the first flat surface to the distal end and at a second angle relative to the axis of the assembly, the first angle and the second angle being different.

[0092] Clause 16: The method of clause 14, wherein the barb-forming profile comprises: two axially extending prongs and a cavity defined therebetween, the cavity defined by a flat bottom surface of the core pin disposed at the distal end of the second core pin perpendicular to an axis of the assembly and an angled inner surface of each prong; and two chamfered edges disposed diametrically opposite one another, each chamfered edge defined between the flat bottom surface and an outer surface of the second core pin.

[0093] Clause 17: A connector comprising: a tubular having a first port at a first axial end; an internal passageway defined in the tubular, the first port being in fluid communication with the internal passageway; a first barb feature disposed proximate the first axial end and disposed on an outer circumferential surface of the tubular, the first barb feature projecting radially away from the outer circumferential surface; a first collar disposed about at least a portion of the tubular proximate the first axial end and radially spaced apart from the tubular, a first gap being defined between the outer circumferential surface of the tubular and the first collar; a second collar connected to the outer circumferential surface of the tubular and connected to the first collar, a first opening being defined between the second collar and the first collar; and a plurality of first ribs arranged circumferentially spaced apart from one another on an inner circumferential surface of the first collar, wherein each first rib at least partially defines a first edge with an inner circular end face of the first collar, and wherein the first edge projects into the first gap.

[0094] Clause 18: The connector of Clause 17, wherein the tubular has a second port at a second axial end opposite the first axial end, and the internal passageway fluidly connects the first port with the second port, and further comprising: a second barb feature disposed proximate the second axial end and disposed on the outer circumferential surface of the tubular, the second barb feature projecting radially away from the outer circumferential surface; a third collar disposed about at least a portion of the tubular proximate the second axial end and radially spaced apart from the tubular, wherein a second gap is defined between the third collar and the outer circumferential surface of the tubular, and the third collar is connected to the second collar and a second opening is defined therebetween; and a plurality of second ribs arranged circumferentially spaced apart from one another on an inner circumferential surface of the third collar, wherein each second rib at least partially defines a second edge with an inner circular end face of the third collar, and wherein the second edge projects into the second gap.

[0095] Clause 19: The connector of Clause 17, wherein each first edge and the first barb feature are axially aligned with one another.

[0096] Clause 20: The connector of Clause 17, wherein each first edge and the first barb feature are axially offset from one another.

[0097] Clause 21: The connector of Clause 17, wherein each second edge and the second barb feature are axially aligned with one another.

[0098] Clause 22: The connector of Clause 17, wherein each second edge and the second barb feature are axially offset from one another.

[0099] Clause 23: The connector of Clause 17, further comprising a fluid line inserted over the first barb feature, wherein the first edge of the first rib contacts an outer surface of the fluid line.

[0100] Clause 24: The connector of Clause 17, wherein the outer circumferential surface of the tubing includes a luer profile.

[0101] Clause 25: The connector of Clause 17, wherein the tubing has a second axial end opposite the first axial end, and the second collar is disposed about at least a portion of the tubing in the vicinity of the second axial end.

[0102] Clause 26: The connector of Clause 25, wherein the second collar includes a plurality of protrusions disposed to extend radially inward from an inner circumferential surface of the second collar, the plurality of protrusions being axially spaced apart from one another.

[0103] Further Considerations

[0104] In some embodiments, any of the clauses herein can rely on any one of the independent clauses or any one of the dependent clauses. In one aspect, any clause (e.g., dependent or independent) can be combined with any other one or more clauses (e.g., dependent or independent). In one aspect, a claim can include some or all of the words (e.g., steps, operations, means, or components) recited in a clause, sentence, phrase, or paragraph. In one aspect, a claim can include some or all of the words recited in one or more clauses, sentences, phrases, or paragraphs. In one aspect, some of the words in each clause, sentence, phrase, or paragraph can be removed. In one aspect, additional words or elements can be added to a clause, sentence, phrase, or paragraph. In one aspect, the subject technology can be practiced without utilizing some of the components, elements, functions, or operations described herein. In one aspect, the subject technology can be practiced with additional components, elements, functions, or operations.

[0105] The preceding description is provided to enable any person skilled in the art to practice the various configurations described herein. While the subject technology has been particularly described with reference to the various figures and configurations, it should be understood that these are for illustration purposes only and should not be taken as limiting the scope of the subject technology.

[0106] There can be many other ways to implement the subject technology. Various functions and elements of the described various configurations can be partitioned differently from those shown without departing from the scope of the subject technology. Various modifications to these configurations will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other configurations. Thus, many changes and modifications can be made to the subject technology, by one having ordinary skill in the art, without departing from the scope of the subject technology.

[0107] It is to be understood that the specific order or hierarchy of steps in the processes disclosed is an illustration of exemplary processes. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes can be re-arranged. Some of the steps can be performed at the same time. The accompanying method claims present elements of the various steps in the order in which they are presented in the exemplary processes. The method claims are not meant to be limited to the specific order or hierarchy presented.

[0108] As used herein, the phrase “at least one of’ followed by a listing of two or more items is to be interpreted as one or more of any one of the listed items individually, or the listed items taken collectively in any combination. For example, the phrase “at least one of A, B, and C” or “at least one of A, B, or C” can be interpreted as only A, only B, or only C; A, B, and C individually; any combination of A, B, and C; and / or at least one of A, B, and C.

[0109] Terms such as “top,” “bottom,” “front,” “back,” and the like used in this disclosure should be understood in relation to any arbitrary frame of reference, and not in relation to an ordinary gravitational reference frame. Thus, a top surface, a bottom surface, a front surface, and a back surface can extend upwardly, downwardly, diagonally, or horizontally in a gravitational reference frame.

[0110] In addition, the use of the term “including”, “containing”, and the like, with respect to the terms “comprising”, “having”, and the like, is intended to be an open-ended inclusion using, for example, the term “comprising”, as if it were the term “including”, “containing”, or the like, in connection with the terms “comprising”, “having”, and the like.

[0111] In one or more aspects, the terms “approximately,” “substantially,” and “about” can provide an industry-accepted tolerance to the corresponding term and / or other term(s) in connection with which it is used.

[0112] The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any implementation described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other implementations.

[0113] Unless specifically stated otherwise, a reference to an element "by the singular" does not exclude the plural. A reference to an element "by the singular" means "one or more" unless otherwise explicitly stated. Male pronouns include female and neutral gender (e.g., his and her include her and his). The term "some" refers to one or more. Underlined and / or italicized headings and subheadings are used for convenience and do not limit the subject technology, which is defined by the language following the headings and subheadings. All structural and functional equivalents to the elements of the various configurations described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and intended to be encompassed by the subject technology. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether these disclosure elements are explicitly recited in the above description.

[0114] Although the detailed description contains many specifics, these should not be construed as limiting the scope of the subject technology but merely as illustrating different examples and aspects of the subject technology. It should be appreciated that the scope of the subject technology includes other embodiments not discussed above in detail. Various other modifications, changes and variations which will be apparent to those skilled in the art can be made in the arrangement, operation and details of the methods and apparatus of the subject technology disclosed herein without departing from the scope of the disclosure. Unless otherwise stated, a reference to an element "by the singular" does not exclude the plural. Also, a method or process does not necessarily solve every problem that is solvable by different embodiments of the disclosure (or have every advantage that is achievable by different embodiments of the disclosure). "Can" and its derivatives are used herein to mean "may" or "possibly" rather than "necessarily."

Claims

1. A connector comprising: a tubular structure having a first port at a first axial end; an internal passageway defined in the tubular structure, the first port in fluid communication with the internal passageway; a first barb feature disposed proximate the first axial end and disposed on an outer circumferential surface of the tubular structure, the first barb feature projecting radially away from the outer circumferential surface; a first collar disposed around at least a portion of the tubular structure proximate the first axial end and radially spaced apart from the tubular structure, a first gap defined between the outer circumferential surface of the tubular structure and the first collar; a second collar connected to the outer circumferential surface of the tubular structure and connected to the first collar, a first opening defined between the second collar and first collar; and a plurality of first ribs arranged circumferentially spaced apart from one another on an inner circumferential surface of the first collar, wherein each first rib defines a first edge at least partially with an inner circular end face of the first collar, and wherein the first edge projects into the first gap. the tubular structure having a second port at a second axial end opposite the first axial end, and the internal passageway fluidly connecting the first port with the second port, and the connector further comprising:

2. The connector of claim 1, wherein, a second barb feature disposed proximate the second axial end and disposed on an outer circumferential surface of the tubular structure, the second barb feature projecting radially away from the outer circumferential surface; a third collar disposed around at least a portion of the tubular structure proximate the second axial end and radially spaced apart from the tubular structure, wherein a second gap is defined between the third collar and the outer circumferential surface of the tubular structure, and the third collar is connected to the second collar and a second opening is defined therebetween; and a plurality of second ribs arranged circumferentially spaced apart from one another on an inner circumferential surface of the third collar, wherein each second rib defines a second edge at least partially with an inner circular end face of the third collar, and wherein the second edge projects into the second gap. each first edge and first barb feature are axially aligned with one another.

3. The connector of claim 1, wherein, each first edge and first barb feature are axially offset from one another.

4. The connector of claim 1, wherein, each second edge and second barb feature are axially aligned with one another.

5. The connector of claim 2, wherein, each second edge and second barb feature are axially offset from one another.

6. The connector of claim 2, wherein, 7. The connector of claim 1, further comprising a fluid line inserted over the first barb feature, wherein the first edge of the first rib contacts an outer surface of the fluid line. the outer circumferential surface of the tubular structure comprises a luer profile.

8. The connector of claim 1, wherein, the tubular structure has a second axial end opposite the first axial end, and the second collar is disposed around at least a portion of the tubular structure proximate the second axial end.

9. The connector of claim 1, wherein, the second collar comprises a plurality of protrusions disposed to extend radially inwardly from an inner circumferential surface of the second collar, the plurality of protrusions being axially spaced apart from one another.

10. The connector of claim 9, wherein, ​

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