Patent Description:
The present disclosure relates to a connection verifier for a fluid connection, and, more particularly, to a fluid connection comprising a radio-frequency identification (RFID) tag that indicates the status of a connection via wireless transmission.

As is known in the art, a "fluid" is a substance that continually deforms (flows) under an applied shear stress, or external force. Fluids are a phase of matter and include liquids, gases, and plasmas.

Fluid connectors are integral components for many applications, and especially for automotive applications. Since an automotive system is made up of various components such as a radiator, transmission, and engine, fluid must be able to travel not only within each component but also between components. An example of fluid traveling between components is the transmission fluid traveling from the transmission to the transmission oil cooler in order to lower the temperature of the transmission fluid. Fluid predominantly moves between components via flexible or rigid hoses which connect to each component by fluid connectors and/or a clamp/clamping element. Such fluid connectors typically include a retaining ring, retaining clip, snap ring, clamp, or other clamping element carried on the fluid connector which is adapted to snap behind a raised shoulder of a tube end form when the tube end form is fully inserted into the fluid connector. If the tube end form or hose is not fully inserted into the fluid connector or clamped to the connector, the fluid connection may fail causing fluids to leak out and other more serious consequences. It should be appreciated that fluid connectors extend not only to liquid connections but also to gas and plasma connections. For example, fluid connectors used for the transfer of propane, butane, natural gas, etc. are widely used commercially and non-commercially. Failure of a gas connection, as with liquid connectors, may have serious consequences.

RFID uses electromagnetic fields to automatically identify and track tags attached to objects. The tags contain electronically stored information. Passive RFID tags collect energy from a nearby RFID reader's interrogating radio waves. Active RFID tags have a local power source (such as a battery) and may operate hundreds of meters from the RFID reader. Unlike a barcode, RFID tags don't need to be within the line of sight of the reader, so they may be embedded in the tracked object. RFID is one method of automatic identification and data capture (AIDC). RFID tags are used in many industries. For example, a RFID tag attached to an automobile during production can be used to track its progress through the assembly line, RFID-tagged pharmaceuticals can be tracked through warehouses, and implanting RFID microchips in livestock and pets enables positive identification of animals.

Thus, there has been a long-felt need for a connection verifier that utilizes RFID to ensure that a fluid connection is securely connected.

A connection verification system having an IC tag board on the connector body and a retainer element for engaging the tube and electrically connecting with the IC tag on the connector body is disclosed in <CIT>. Further connection systems related to the one of the present invention are disclosed in <CIT> and <CIT>.

According to aspects illustrated herein, there is provided a radio-frequency identification (RFID) fluid connection, comprising a tube, including a radially outward facing surface, a RFID assembly connected the radially outward facing surface, including a RFID tag, and at least one contact electrically connected to the RFID tag.

The RFID fluid connection of the present invention is defined in Claim <NUM>. Further advantageous features are set out in the dependent claims.

In some embodiments, the tube further comprises a shoulder connected to the radially outward facing surface and the RFID assembly is arranged proximate the shoulder. In some embodiments, the RFID assembly is arranged on a first layer and the first layer is connected to the radially outward facing surface. In some embodiments the at least one contact comprises a first contact electrically connected to the RFID tag and a second contact electrically connected to the RFID tag, the second contact being separated from the first contact to form an open state of the RFID assembly. In some embodiments, in a closed state, the first contact is electrically connected to the second contact. In some embodiments, the first contact is operatively arranged to be electrically connected to the second contact via a retaining ring when the tube is connected to a fluid connector. In some embodiments, the at least one contact comprises a pressure sensitive contact electrically connected to the RFID tag via a first conductor and a second conductor. In some embodiments, the pressure sensitive contact comprises a first conductive layer electrically connected to the first conductor, a second conductive layer electrically connected to the second conductor, and an insulating layer separating the first and second conductive layers to form an open state of the RFID assembly. In some embodiments, in a closed state, the first conductive layer is electrically connected to the second conductive layer via a force applied to the first conductive layer. In some embodiments, the force is applied to the first conductive layer via a retaining ring of a fluid connector when the tube is connected to the fluid connector. In some embodiments, the RFID tag comprises an antenna, in an open state of the RFID tag, the antenna circuit is open, and in a closed state of the RFID tag, the antenna circuit is closed.

According to aspects illustrated herein, there is provided a radio-frequency identification (RFID) fluid connection, comprising a fluid connector, a retaining ring operatively arranged to engage the fluid connector, a tube operatively arranged to be connected to the fluid connector, the tube including a first radially outward facing surface, and a RFID assembly arranged on the first radially outward facing surface, including a RFID tag, and at least one contact electrically connected to the RFID tag.

In some embodiments, the tube further comprises a shoulder (or designated hose location or hose engagement surface) connected to the first radially outward facing surface, the shoulder arranged to interact with the retaining ring to lock the tube within the fluid connector and the at least one contact is operatively arranged proximate the shoulder to engage with the retaining ring. In some embodiments, the at least one contact comprises a first contact electrically connected to the RFID tag and a second contact electrically connected to the RFID tag, the second contact being separated from the first contact to form an open state of the RFID assembly. In some embodiments, when the tube is properly secured to the fluid connector, the retaining ring engages the first contact and the second contact, and the first contact is electrically connected to the second contact to form a closed state of the RFID assembly. In some embodiments, the retaining ring is a clamp. In some embodiments, the fluid connector comprises a second radially outward facing surface, and the tube and the retaining ring are operatively arranged to engage the second radially outward facing surface. In some embodiments, the RFID assembly is arranged on a layer and the layer is connected to the first radially outward facing surface. In some embodiments, the RFID tag comprises an antenna, in an open state of the RFID tag, the antenna circuit is open, and in a closed state of the RFID tag, the antenna circuit is closed.

According to aspects illustrated herein, there is provided a radio-frequency identification (RFID) fluid connection, comprising a fluid connector, a retaining ring operatively arranged to engage the fluid connector, a tube operatively arranged to be connected to the fluid connector, the tube including a radially outward facing surface, and a RFID assembly arranged on the radially outward facing surface and including a RFID tag including an antenna and an integrated circuit, and at least one contact electrically connected to the integrated circuit, wherein when the integrated circuit is open, the RFID tag indicates an improper connection of the RFID fluid connection, and when the integrated circuit is closed, the RFID tag indicates a proper connection of the RFID fluid connection.

These and other objects, features, and advantages of the present disclosure will become readily apparent upon a review of the following detailed description of the disclosure, in view of the drawings and appended claims.

Various embodiments are disclosed, by way of example only, with reference to the accompanying schematic drawings in which corresponding reference symbols indicate corresponding parts, in which:.

At the outset, it should be appreciated that like drawing numbers on different drawing views identify identical, or functionally similar, structural elements. It is to be understood that the claims are not limited to the disclosed aspects.

Furthermore, it is understood that this disclosure is not limited to the particular methodology, materials and modifications described and as such may, of course, vary. It is also understood that the terminology used herein is for the purpose of describing particular aspects only, and is not intended to limit the scope of the claims.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure pertains. The assembly of the present disclosure could be driven by hydraulics, electronics, pneumatics, and/or springs.

It should be appreciated that the term "substantially" is synonymous with terms such as "nearly," "very nearly," "about," "approximately," "around," "bordering on," "close to," "essentially," "in the neighborhood of," "in the vicinity of," etc., and such terms may be used interchangeably as appearing in the specification and claims. It should be appreciated that the term "proximate" is synonymous with terms such as "nearby," "close," "adjacent," "neighboring," "immediate," "adjoining," etc., and such terms may be used interchangeably as appearing in the specification and claims. The term "approximately" is intended to mean values within ten percent of the specified value.

It should be understood that use of "or" in the present application is with respect to a "non-exclusive" arrangement, unless stated otherwise. For example, when saying that "item x is A or B," it is understood that this can mean one of the following: (<NUM>) item x is only one or the other of A and B; (<NUM>) item x is both A and B. Alternately stated, the word "or" is not used to define an "exclusive or" arrangement. For example, an "exclusive or" arrangement for the statement "item x is A or B" would require that x can be only one of A and B. Furthermore, as used herein, "and/or" is intended to mean a grammatical conjunction used to indicate that one or more of the elements or conditions recited may be included or occur. For example, a device comprising a first element, a second element and/or a third element, is intended to be construed as any one of the following structural arrangements: a device comprising a first element; a device comprising a second element; a device comprising a third element; a device comprising a first element and a second element; a device comprising a first element and a third element; a device comprising a first element, a second element and a third element; or, a device comprising a second element and a third element.

Moreover, as used herein, the phrases "comprises at least one of" and "comprising at least one of" in combination with a system or element is intended to mean that the system or element includes one or more of the elements listed after the phrase. For example, a device comprising at least one of: a first element; a second element; and, a third element, is intended to be construed as any one of the following structural arrangements: a device comprising a first element; a device comprising a second element; a device comprising a third element; a device comprising a first element and a second element; a device comprising a first element and a third element; a device comprising a first element, a second element and a third element; or, a device comprising a second element and a third element. A similar interpretation is intended when the phrase "used in at least one of:" is used herein. Furthermore, as used herein, "and/or" is intended to mean a grammatical conjunction used to indicate that one or more of the elements or conditions recited may be included or occur. For example, a device comprising a first element, a second element and/or a third element, is intended to be construed as any one of the following structural arrangements: a device comprising a first element; a device comprising a second element; a device comprising a third element; a device comprising a first element and a second element; a device comprising a first element and a third element; a device comprising a first element, a second element and a third element; or, a device comprising a second element and a third element.

By "non-rotatably connected" elements, we mean that: the elements are connected so that whenever one of the elements rotate, all the elements rotate; and relative rotation between the elements is not possible. Radial and/or axial movement of non-rotatably connected elements with respect to each other is possible, but not required.

It should be appreciated that the term "tube" as used herein is synonymous with hose, pipe, channel, conduit, or any other suitable pipe flow used in hydraulics and fluid mechanics. It should further be appreciated that the term "tube" can mean a rigid or flexible conduit of any material suitable for containing and allowing the flow of a gas or a liquid.

Adverting now to the figures, <FIG> is a perspective view of RFID fluid connection <NUM>. <FIG> is an exploded perspective view of RFID fluid connection <NUM>. RFID fluid connection <NUM> generally comprises tube or tube end form or hose <NUM>, fluid connector <NUM>, retaining ring <NUM>, and RFID assembly <NUM>, <NUM>. The following description should be read in view of <FIG>.

Tube end form <NUM> comprises end <NUM>, section <NUM>, shoulder <NUM>, section <NUM>, end <NUM>, and through-bore <NUM>. Through-bore <NUM> extends through tube end form <NUM> from end <NUM> to end <NUM>. Section <NUM> is arranged between end <NUM> and shoulder <NUM> and comprises radially outward facing surface <NUM>. Radially outward facing surface <NUM> includes a substantially constant diameter. Shoulder <NUM> is arranged between section <NUM> and section <NUM> and comprises radially outward facing surface <NUM>. Radially outward facing surface <NUM> is a linear conical (or frusto-conical) shape and increases in diameter in axial direction AD2. Section <NUM> is arranged between shoulder <NUM> and end <NUM> and comprises radially outward facing surface <NUM>. Radially outward facing surface <NUM> includes a substantially constant diameter. Shoulder <NUM> is connected to radially outward facing surface <NUM> via shoulder surface <NUM>. Tube end form <NUM> is arranged to be inserted, specifically with end <NUM> first, into fluid connector <NUM>. Tube end form <NUM> may utilize a straight ramp (i.e., constant linear ramp) or a curvilinear ramp, and is inserted into fluid connector <NUM>, in axial direction AD1, until retaining ring <NUM> snaps over shoulder <NUM> and is generally aligned with section <NUM>. It should be appreciated that tube end form <NUM> may be any traditional tube end form comprising a ramp, which extends radially outward and axially on the outer surface of the tube end form, to displace a retaining ring, snap ring, or wire clip within the fluid connector to secure the tube end form within the fluid connector. In some embodiments, tube end form <NUM> comprises any tube end form that might utilize a retaining ring, retaining clip, snap ring etc. For example, instead of a ramp-like shoulder, tube end form <NUM> may comprise a bead, a notch, a plurality of ramps, threading, a shoulder having a variable diameter portion (ramp) and a constant diameter portion connected thereto, any standard Society of Automotive Engineers (SAE) end form, etc. The present disclosure should not be limited to the use of only the tube end form shown in the figures, but rather any tube end form suitable for fluidly connecting to a fluid connector via a retaining ring. RFID assembly <NUM>, <NUM> verifies that retaining ring <NUM> has "snapped" over shoulder <NUM> (and is arranged adjacent and/or proximate to shoulder surface <NUM>) in order to determine that RFID fluid connection <NUM> is properly connected, as will be described in greater detail below.

Fluid connector <NUM> comprises through-bore <NUM>, radially inward facing surface <NUM>, radially inward facing surface <NUM> (not shown), and radially outward facing surface <NUM>. Radially outward facing surface <NUM> comprises groove <NUM>. Retaining ring <NUM> is arranged in groove <NUM>. Retaining ring <NUM> comprises protrusions 52A, 52B, and 52C (see <FIG> and <FIG>). Protrusions 52A-C extend radially inward through apertures in groove <NUM> to engage shoulder <NUM>, specifically, shoulder surface <NUM>. It should be appreciated that retaining ring <NUM> may comprise any number of protrusions (e.g., one or more protrusions) suitable for properly connecting tube end form <NUM> and fluid connector <NUM> and contacting the one or more contacts of RFID assembly <NUM>, <NUM> to indicate proper connection, as will be described in greater detail below. In some fluid connections which are not according to the appended claims, retaining ring <NUM> has no protrusions. For example, retaining ring <NUM> may comprises a "C" clip which comprises a ring having a small section removed therefrom such that it is capable of radially expanding and snapping back to engage the one or more contacts.

<FIG> is a top planar view of RFID assembly <NUM>, in accordance with some embodiments of the present disclosure. <FIG> is a perspective view of RFID assembly <NUM> arranged on tube end form <NUM>. <FIG> is a cross-sectional view of RFID assembly <NUM> arranged on tube end form <NUM> taken generally along line <NUM>-<NUM> in <FIG>. RFID assembly <NUM> generally comprises at least one layer (e.g., adhesive layer <NUM> and/or layer <NUM>), RFID tag <NUM>, and at least one contact (e.g., contact 80A and/or contact 80B). In some embodiments, RFID assembly <NUM> is a RFID label that is connected to a tube or component, wherein the tube or component is arranged to be connected to another component. It should be appreciated that RFID assembly <NUM> may be used to ensure any type of connection, not just a connection related to the flow of fluid, for example, a constant-velocity (CV) j oint, a trailer hitch connection, electrical connections, etc. The following description should be read in view of <FIG>.

Adhesive layer <NUM> is operatively arranged to be secured to tube end form <NUM>. In some embodiments, adhesive layer <NUM> secures layer <NUM> and/or contacts 80A and 80B to tube end form <NUM>. It should be appreciated that layer <NUM> need not be connected to tube end form <NUM> via adhesives (i.e., adhesive layer <NUM>), but rather can be connected and/or applied using any other suitable means, for example, string, tape, hook and loop fastener, solder, welding, etc. In some embodiments, adhesive layer <NUM> is wrapped around section <NUM> of tube end form <NUM> and is secured to radially outward facing surface <NUM> proximate to shoulder <NUM>. In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and overlaps at its ends (see <FIG>). In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and its ends abut against each other (see <FIG>). In some embodiments, adhesive layer <NUM> does not completely circumscribe radially outward facing surface <NUM>.

RFID assembly <NUM> may further comprise layer <NUM>. Layer <NUM> is connected to the top surface of adhesive layer <NUM> and is operatively arranged as a platform or base for RFID tag <NUM> and contacts 80A-B. In some embodiments, layer <NUM> comprises ferrite. In some embodiments, RFID tag <NUM> and contacts 80A-B are connected directly to the top surface of adhesive layer <NUM>, without the need for layer <NUM>. In some embodiments, RFID tag <NUM> and contacts 80A-B are connected directly to radially outward facing surface <NUM> without the need for adhesive layer <NUM> or layer <NUM>. In some embodiments, RFID assembly <NUM> further comprises layer <NUM>. Layer <NUM> is operatively arranged to cover and protect RFID tag <NUM>. As shown in <FIG>, layer <NUM> completely covers RFID tag <NUM> and at least partially covers contacts 80A and 80B. However, it is required that at least a portion of contacts 80A and 80B are exposed, for example, exposed portions 82A and 82B, such that they are capable of engaging retaining ring <NUM>, as will be described in greater detail below.

RFID tag <NUM> comprises integrated circuit (IC) or chip <NUM> and antenna <NUM>. In some embodiments, RFID tag <NUM> comprises a passive RFID tag. In some embodiments, RFID tag <NUM> comprises an active RFID tag (and further comprises a power source). In some embodiments, RFID tag <NUM> comprises a semi-passive RFID tag. In some embodiments, RFID tag <NUM> is preprogrammed such that it transmits information, for example, a unique identification (UID) number, the state of RFID assembly <NUM> (i.e., open or closed), etc. Antenna <NUM> is connected at a first end to IC <NUM> at antenna radio-frequency (RF) input LA, and at a second end to IC <NUM> at antenna RF input LB, via conductors 76A and 76B, respectively. RFID tag <NUM> is further connected to contact 80A and contact 80B. Specifically, conductor 78A connects contact 80A with IC <NUM> at ground pin GND and conductor 78B connects contact 80B with IC <NUM> at detector pin DP.

Contact 80A is separated from contact 80B by gap <NUM> and gap <NUM> (see <FIG>). In some embodiments, gap <NUM> is equal to gap <NUM>. In some embodiments, gap <NUM> is less than gap <NUM>. In some embodiments, gap <NUM> is greater than gap <NUM>. Contacts 80A and 80B are arranged proximate to or abutting against shoulder <NUM>, specifically shoulder surface <NUM>. Contacts 80A and 80B are operatively arranged to engage with retaining ring <NUM>. In some embodiments, contacts 80A and 80B are electrical conductors. When tube end form <NUM> is properly secured in fluid connector <NUM>, retaining ring <NUM> expands along shoulder <NUM> and then snaps behind shoulder surface <NUM> thereby locking tube end form <NUM> within fluid connector <NUM>. When retaining ring <NUM> snaps back behind shoulder <NUM> and abuts against and/or is arranged proximate to shoulder surface <NUM>, protrusions 52A-C engage contacts 80A and 80B. For example, and as shown in <FIG>, protrusion 52C (and protrusion 52B) is engaged with contact 80B and protrusion 52A is engaged with contact 80A. In some embodiments, retaining ring <NUM> comprises an electrical conductive material (e.g., metal). As such, retaining ring <NUM> completes the circuit between contacts 80A-B and IC <NUM> and causes RFID tag <NUM> to become enabled (i.e., RFID tag <NUM> is capable of being powered by an electromagnetic field generated by an external device (not shown)) or switch to a closed state (from an open state). Prior to completion of the circuit, namely, electrically connecting contact 80B directly with contact 80A, RFID tag <NUM> is not enabled (i.e., RFID tag <NUM> is not capable of being powered by an electromagnetic field generated by the external device) or in some embodiments, it indicates an open status. When the circuit is completed (i.e., retaining ring <NUM> directly connects contact 80A and contact 80B as shown in <FIG>), an external device such as a RFID reader will detect that RFID tag <NUM> is enabled, or in a closed state, thereby indicating that RFID fluid connection <NUM> is properly connected. Put another way, when RFID tag <NUM> is enabled, the RFID reader will identify that RFID tag <NUM> exists and thus determine that RFID fluid connection <NUM> is properly connected. When the circuit is not completed (i.e., contact 80A is not directly connected to contact 80B), the RFID reader will not detect an enabled RFID tag <NUM> thereby indicating that RFID fluid connection <NUM> is not properly connected. Put in yet another way, when RFID tag <NUM> is disabled, the RFID reader will not identify that RFID tag <NUM> exists and thus determine that RFID fluid connection <NUM> is not properly connected.

In some embodiments, RFID tag <NUM> is always enabled and can be detected and read by a RFID reader regardless of whether contacts 80A and 80B are connected. In such embodiments, when contacts 80A and 80B are not directly connected, for example via retaining ring <NUM>, RFID tag <NUM> is capable of transmitting, to a RFID reader, certain information. Such information may include, but is not limited to, a UID number (e.g., for the RFID tag, the tube end form, etc.), size number, model number, serial number, status of RFID tag <NUM> (i.e., open or closed), uniform resource locator (URL), station identification (i.e., manufacturing LOT number), date/time stamp, description, etc. Put another way, independent of whether contacts 80A and 80B are connected, RFID tag <NUM> will always transmit certain data (e.g., a UID number, a status, etc.) provided it is properly functioning. Thus, RFID tag <NUM> is preprogrammed to always transmit at least a UID number and a status (i.e., open or closed), for example, using hexadecimal data or a value. This is important because it allows the user to scan a given RFID tag to determine if it is properly functioning (i.e., if the RFID tag is properly transmitting data then it is properly functioning) as well as to determine its current state (i.e., open or closed). When contacts 80A and 80B are connected, for example, via retaining ring <NUM>, RFID tag <NUM> transmits data indicating a closed status. In some embodiments, RFID tag <NUM> indicates a first value (e.g., a first hexadecimal value) for an open state and a second value (e.g., second hexadecimal value) for a closed state, the second value being different from the first value. It should be appreciated that RFID tag <NUM> may include any programming suitable for indicating that it is properly functioning and a differentiation between an open state and a closed state, and that the present disclosure should not be limited to just the use of the hexadecimal system.

<FIG> is a top planar view of RFID assembly <NUM>, in accordance with some embodiments of the present disclosure. <FIG> is a perspective view of RFID assembly <NUM> arranged on tube end form <NUM>. <FIG> is a cross-sectional view of RFID assembly <NUM> arranged on tube end form <NUM> taken generally along line <NUM>-<NUM> in <FIG>. RFID assembly <NUM> generally comprises at least one layer (e.g., adhesive layer <NUM> and/or layer <NUM>), RFID tag <NUM>, and at least one contact (e.g., contact <NUM>). In some embodiments, RFID assembly <NUM> is a RFID label that is connected to a tube or component, wherein the tube or component is arranged to be connected to another component. It should be appreciated that RFID assembly <NUM> may be used to ensure any type of connection, not just a connection related to the flow of fluid, for example, a constant-velocity (CV) joint, a trailer hitch connection, electrical connections, etc. The following description should be read in view of <FIG> and <FIG>.

Adhesive layer <NUM> is operatively arranged to be secured to tube end form <NUM>. In some embodiments, adhesive layer <NUM> secures layer <NUM> and/or contact <NUM> to tube end form <NUM>. It should be appreciated that layer <NUM> need not be connected to tube end form <NUM> via adhesives (i.e., adhesive layer <NUM>), but rather can be connected and/or applied using any other suitable means, for example, string, tape, hook and loop fastener, solder, welding, etc. In some embodiments, adhesive layer <NUM> is wrapped around section <NUM> of tube end form <NUM> and is secured to radially outward facing surface <NUM> proximate to shoulder <NUM>. In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and overlaps at its ends (see <FIG>). In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and its ends abut against each other (see <FIG>). In some embodiments, adhesive layer <NUM> does not completely circumscribe radially outward facing surface <NUM>.

RFID assembly <NUM> may further comprise layer <NUM>. Layer <NUM> is connected to the top surface of adhesive layer <NUM> and is operatively arranged as a platform or base for RFID tag <NUM> and contact <NUM>. In some embodiments, layer <NUM> comprises ferrite. In some embodiments, RFID tag <NUM> and contact <NUM> are connected directly to the top surface of adhesive layer <NUM>, without the need for layer <NUM>. In some embodiments, RFID tag <NUM> and contact <NUM> are connected directly to radially outward facing surface <NUM> without the need for adhesive layer <NUM> or layer <NUM>. In some embodiments, RFID assembly <NUM> further comprises layer <NUM>. Layer <NUM> is operatively arranged to cover and protect RFID tag <NUM>. As shown in <FIG>, layer <NUM> completely covers RFID tag <NUM> and at least partially covers contact <NUM>. However, it is required that at least a portion of contact <NUM> is exposed, for example exposed portion <NUM>, such that it is capable of engaging retaining ring <NUM>, as will be described in greater detail below.

RFID tag <NUM> comprises integrated circuit (IC) or chip <NUM> and antenna <NUM>. In some embodiments, RFID tag <NUM> comprises a passive RFID tag. In some embodiments, RFID tag <NUM> comprises an active RFID tag (and further comprises a power source). In some embodiments, RFID tag <NUM> comprises a semi-passive RFID tag. In some embodiments, RFID tag <NUM> is preprogrammed such that it transmits information, for example, a UID number, the state of RFID assembly <NUM> (i.e., open or closed), etc. Antenna <NUM> is connected at a first end to IC <NUM> at antenna radio-frequency (RF) input LA, and at a second end to IC <NUM> at antenna RF input LB, via conductors 176A and 176B, respectively. RFID tag <NUM> is further connected to contact <NUM>. Specifically, conductor 178A connects contact <NUM> with IC <NUM> at ground pin GND and conductor 178B connects contact <NUM> with IC <NUM> at detector pin DP.

Contact <NUM> circumscribes radially outward facing surface <NUM>. In some embodiments, and as shown in <FIG>, the ends of contact <NUM> may be separated by gap <NUM>. In some embodiments, the ends of contact <NUM> abut against each other. In some embodiments, the ends of contact <NUM> overlap each other. Contact <NUM> is arranged proximate to or abutting against shoulder <NUM>, specifically shoulder surface <NUM>. Contact <NUM> is operatively arranged to engage with retaining ring <NUM>. In some embodiments, contact <NUM> is a pressure sensitive contact. When tube end form <NUM> is properly secured in fluid connector <NUM>, retaining ring <NUM> expands along shoulder <NUM> and then snaps behind shoulder surface <NUM> thereby locking tube end form <NUM> within fluid connector <NUM>. When retaining ring <NUM> snaps back behind shoulder <NUM> and abuts against shoulder surface <NUM>, protrusions 52A-C engage contact <NUM> and apply a pressure thereto. For example, and as shown in <FIG>, protrusions 52A-C are engaged with contact <NUM>. In some embodiments, retaining ring <NUM> comprises metal. In some embodiments, retaining ring <NUM> comprises a non-metallic material such as a polymer or an elastomer. It should be appreciated that retaining ring <NUM> may comprise any material suitable to snap over shoulder <NUM> and apply pressure to contact <NUM>. Once a sufficient pressure is applied to contact <NUM>, the circuit is completed between conductors 178A and 178B and IC <NUM> and causes RFID tag <NUM> to become enabled (i.e., RFID tag <NUM> is capable of being powered by an electromagnetic field generated by an external device (not shown)) or indicate a closed state. Prior to completion of the circuit, namely, electrically connecting the ends of conductors 178A and 178B, RFID tag <NUM> is not enabled (i.e., RFID tag <NUM> is not capable of being powered by an electromagnetic field generated by the external device) or indicates an open state. When the circuit is completed (i.e., retaining ring <NUM> applies a sufficient pressure to contact <NUM> thereby electrically connecting conductor 178A directly with conductor 178B), an external device such as a RFID reader will detect that RFID tag <NUM> is enabled or in a closed state thereby indicating that RFID fluid connection <NUM> is properly connected. Put another way, when RFID tag <NUM> is enabled, the RFID reader will identify that RFID tag <NUM> exists and thus determine that RFID fluid connection <NUM> is properly connected. When the circuit is not completed (i.e., the ends of conductors 178A is not directly connected to contact 178B), the RFID reader will not detect an enabled RFID tag <NUM> thereby indicating that RFID fluid connection <NUM> is not properly connected. Put in yet another way, when RFID tag <NUM> is disabled, the RFID reader will not identify that RFID tag <NUM> exists and thus determine that RFID fluid connection <NUM> is not properly connected.

In some embodiments, RFID tag <NUM> is always enabled and can be detected and read by a RFID reader regardless of whether conductive layers <NUM> and <NUM> are in direct contact. In such embodiments, and as previously discussed, when conductive layers <NUM> and <NUM> are not directly connected, for example from the force of retaining ring <NUM>, RFID tag <NUM> is capable of transmitting, to a RFID reader, certain information. Such information may include, but is not limited to, a UID number, size number, model number, serial number, status of RFID tag <NUM> (i.e., open or closed), URL, station identification, date/time stamp, description, etc. Put another way, independent of whether conductive layers <NUM> and <NUM> are connected, RFID tag <NUM> will always transmit data (e.g., a UID number, a status, etc.) provided it is properly functioning. Thus, RFID tag <NUM> is preprogrammed to always transmit at least a UID number and a status (i.e., open or closed), for example, using hexadecimal data or a value. This is important because it allows the user to scan a given RFID tag to determine if it is properly functioning (i.e., if the RFID tag is properly transmitting data then it is properly functioning) as well as to determine its current state (i.e., open or closed). When conductive layers <NUM> and <NUM> are connected, for example, by applying a suitable force F to layer <NUM> via retaining ring <NUM>, RFID tag <NUM> transmits data indicating a closed status. In some embodiments, RFID tag <NUM> indicates a first value (e.g., a first hexadecimal value) for an open state and a second value (e.g., a second hexadecimal value) for a closed state, the second value being different from the first value. It should be appreciated that RFID tag <NUM> may include any programming suitable for indicating that it is properly functioning and a differentiation between an open state and a closed state, and that the present disclosure should not be limited to just the use of the hexadecimal system.

<FIG> is a partial cross-sectional schematic view of RFID assembly <NUM> in an open (or disabled) state, in accordance with some embodiments of the present disclosure. It should be appreciated that this is only one embodiment of a pressure sensitive contact, and that various other pressure sensitive contacts that are known in the art or developed in the future may be used. Contact <NUM> comprises conductive layer <NUM>, insulating layer <NUM>, and conductive layer <NUM>. Conductive layer <NUM> is arranged on the top surface of <NUM>. In some embodiments, conductive layer <NUM> is arranged on the top surface of adhesive layer <NUM> (when layer <NUM> is not included). In some embodiments, conductive layer <NUM> is arranged on radially outward facing surface <NUM> of tube end form <NUM> (when layers <NUM> and <NUM> are not included). Insulating layer <NUM> is arranged on top of layer <NUM>. Conductive layer <NUM> is arranged on top of insulating layer <NUM>. Insulating layer <NUM> is operatively arranged to separate conductive layers <NUM> and <NUM> until a sufficient force F is applied to conductive layer <NUM>, as will be described in greater detail below. Conductor 178A connects ground pin GND with conductive layer <NUM> and conductor 178B connects detection pin DP with conductive layer <NUM>. In some embodiments, conductor 178A connects ground pin GND with conductive layer <NUM> and conductor 178B connects detection pin DP with conductive layer <NUM>. As shown in <FIG>, conductors 178A and 178B remain unconnected and thus RFID tag <NUM> will indicate an open state or remains disabled (i.e., a RFID reader would not detect that RFID tag <NUM> exists). As such, in either case, the RFID reader will indicate that RFID fluid connection <NUM> is not properly secured.

<FIG> is a partial cross-sectional schematic view of RFID assembly <NUM> shown in <FIG>, in an closed (or enabled) state. When a sufficient force F is applied to conductive layer <NUM>, for example via retaining ring <NUM>, conductive layer <NUM> is displaced through insulating layer <NUM> and contacts conductive layer <NUM>. When conductive layer <NUM> contacts conductive layer <NUM>, conductors 178A and 178B are electrically connected completing the circuit and RFID tag <NUM> indicates a closed state or is enabled (i.e., RFID tag <NUM> is capable of being powered by an electromagnetic field generated by the RFID reader). As such, in either case, the RFID reader will indicate that RFID fluid connection <NUM> is properly secured.

<FIG> is a perspective view of RFID fluid connection <NUM> in a closed (i.e., secured) state. <FIG> is a perspective view of RFID fluid connection <NUM> in an open (i.e., unsecured) state. <FIG> is an exploded perspective view of RFID fluid connection <NUM>. RFID fluid connection <NUM> generally comprises tube or hose <NUM>, fluid connector <NUM>, retaining ring or clamp <NUM>, and RFID assembly <NUM>. The following description should be read in view of <FIG> which illustrate an example useful to understand the invention but not an embodiment of it.

Tube <NUM> comprises end <NUM>, end <NUM>, radially outward facing surface <NUM>, and through-bore <NUM>. Through-bore <NUM> extends through tube <NUM> from end <NUM> to end <NUM>. Radially outward facing surface <NUM> includes a substantially constant diameter. In some embodiments, radially outward facing surface <NUM> varies in diameter. In some embodiments, tube <NUM> further comprises a shoulder or a bead connected to radially outward facing surface <NUM>. Tube <NUM> is arranged to engage fluid connector <NUM>. Specifically, tube <NUM> is slid over barb <NUM> and radially outward facing surface <NUM> in axial direction AD3. It should be appreciated that in some embodiments, fluid connector <NUM> does not comprise barb <NUM>. Once tube <NUM> is properly engaged with fluid connector <NUM>, retaining ring <NUM> is slid over tube <NUM> in axial direction AD3, as shown in <FIG>. Once properly positioned with the designated clamp location of tube <NUM>, retaining ring <NUM> is crimped to secure tube <NUM> to fluid connector <NUM>, as will be described in greater detail below. In some embodiments, tube <NUM> comprises rubber or another elastic or flexible material suitable to be securable to a fluid connector via a retainer ring or clamp. The present disclosure should not be limited to the use of only the tube shown in the figures, but rather any tube suitable for fluidly connecting to a fluid connector via a retaining ring or clamp. RFID assembly <NUM> verifies that retaining ring <NUM> has adequately tightened around tube <NUM> and fluid connector <NUM> in order to determine that RFID fluid connection <NUM> is properly connected, as will be described in greater detail below.

Fluid connector <NUM> comprises through-bore <NUM>, radially outward facing surface <NUM>, and barb <NUM>. Radially outward facing surface <NUM> and barb <NUM> are arranged to engage through-bore <NUM> of tube <NUM>. Retaining ring <NUM> is arranged to align with radially outward facing surface <NUM>, as shown in <FIG>. Retaining ring <NUM> comprises radially inward facing surface <NUM> and crimp section <NUM>. When crimp section <NUM> is "crimped" or squeezed, the radius of radially inward facing surface <NUM> decreases which allows retaining ring <NUM> to secure tube <NUM> to fluid connector <NUM>. While the figures show a "crimp" style retaining ring or clamp, it should be appreciated that any clamp suitable for securing a tube or a hose to a fluid connector and contacting one or more contacts of RFID assembly <NUM> to indicate proper connection may be utilized, as will be described in greater detail below. Some examples of various retaining rings and clamps that may be used are rigid clamps, U-bolt clamps, flat cushion clamps, U-Bolt with cushion clamps, P style clamps, swivel bolt clamps, worm gear hose clamps, OETIKER® crimp, stepless ear hose clamps, OETIKER® band clamps, OETIKER® ear clamps, OETIKER® STEPLESS® Ear Clamps PEX Series (e.g., PEXGRIP® series ear clamps), OETIKER® spring hose clamps, OETIKER® snap grip clamps, etc..

<FIG> is a top planar view of RFID assembly <NUM>, in accordance with some embodiments of the present disclosure. <FIG> is a cross-sectional view of RFID fluid connection <NUM> taken generally along line <NUM>-<NUM> in <FIG>, in an open state. <FIG> is a cross-section view of RFID fluid connection <NUM> taken generally along line <NUM>-<NUM> in <FIG>, in a closed state. RFID assembly <NUM> generally comprises at least one layer (e.g., adhesive layer <NUM> and/or layer <NUM>), RFID tag <NUM>, and at least one contact (e.g., contact 280A and/or contact 280B). In some embodiments, RFID assembly <NUM> is a RFID label that is connected to a tube or component, wherein the tube or component is arranged to be connected to another component. It should be appreciated that RFID assembly <NUM> may be used to ensure any type of connection, not just a connection related to the flow of fluid, for example, a constant-velocity (CV) joint, a trailer hitch connection, electrical connections, etc. The following description should be read in view of <FIG> which illustrate an example useful to understand the invention but not an embodiment of it.

Adhesive layer <NUM> is operatively arranged to be secured to tube <NUM>. In some embodiments, adhesive layer <NUM> secures layer <NUM> and/or contacts 280A and 280B to tube <NUM>. It should be appreciated that layer <NUM> need not be connected to tube <NUM> via adhesives (i.e., adhesive layer <NUM>), but rather can be connected and/or applied using any other suitable means, for example, string, tape, hook and loop fastener, solder, welding, etc. In some embodiments, adhesive layer <NUM> is wrapped around tube <NUM> and is secured to radially outward facing surface <NUM> proximate to end <NUM>. In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and overlaps at its ends (see <FIG>). In some embodiments, adhesive layer <NUM> completely circumscribes radially outward facing surface <NUM> and its ends abut against each other (see <FIG>). In some embodiments, adhesive layer <NUM> does not completely circumscribe radially outward facing surface <NUM> (see <FIG>).

RFID assembly <NUM> may further comprise layer <NUM>. Layer <NUM> is connected to the top surface of adhesive layer <NUM> and is operatively arranged as a platform or base for RFID tag <NUM> and contacts 280A-B. In some embodiments, layer <NUM> comprises ferrite. In some embodiments, RFID tag <NUM> and contacts 280A-B are connected directly to the top surface of adhesive layer <NUM>, without the need for layer <NUM>. In some embodiments, RFID tag <NUM> and contacts 280A-B are connected directly to radially outward facing surface <NUM> without the need for adhesive layer <NUM> or layer <NUM>. In some embodiments, RFID assembly <NUM> further comprises layer <NUM>. Layer <NUM> is operatively arranged to cover and protect RFID tag <NUM>. As shown in <FIG>, layer <NUM> completely covers RFID tag <NUM>. In some embodiments, layer <NUM> at least partially covers contacts 280A and 280B. However, it is required that at least a portion of contacts 280A and 280B are exposed such that they are capable of engaging retaining ring <NUM>, as will be described in greater detail below.

RFID tag <NUM> comprises integrated circuit (IC) or chip <NUM> and antenna <NUM>. In some embodiments, RFID tag <NUM> comprises a passive RFID tag. In some embodiments, RFID tag <NUM> comprises an active RFID tag (and further comprises a power source). In some embodiments, RFID tag <NUM> comprises a semi-passive RFID tag. In some embodiments, RFID tag <NUM> is preprogrammed such that it transmits information, for example, a unique identification (UID) number, the state of RFID assembly <NUM> (i.e., open or closed), etc. Antenna <NUM> is connected at a first end to IC <NUM> at antenna radio-frequency (RF) input LA, and at a second end to IC <NUM> at antenna RF input LB, via conductors 276A and 276B, respectively. RFID tag <NUM> is further connected to contact 280A and contact 280B. Specifically, conductor 278A connects contact 280A with IC <NUM> at ground pin GND and conductor 278B connects contact 280B with IC <NUM> at detector pin DP.

Contact 280A is separated from contact 280B by gap <NUM> and gap <NUM> (see <FIG>). In some embodiments, gap <NUM> is equal to gap <NUM>. In some embodiments, gap <NUM> is less than gap <NUM>. In some embodiments, gap <NUM> is greater than gap <NUM>. Contacts 280A and 280B are arranged proximate to or abutting against end <NUM>. More specifically, contacts 280A and 280B are operatively arranged to, when RFID fluid connection <NUM> is properly assembled, align with radially outward facing surface <NUM> of connector body and retaining ring <NUM>. Contacts 280A and 280B are operatively arranged to engage with retaining ring <NUM>. In some embodiments, contacts 280A and 280B are electrical conductors. When tube <NUM> is properly secured on fluid connector <NUM>, retaining ring <NUM> is aligned with radially outward facing surface <NUM> and contacts 280A and 280B and crimped or squeezed, thereby locking tube <NUM> onto fluid connector <NUM>. When retaining ring <NUM> is crimped, radially inward facing surface <NUM> engages contacts 280A and 280B. For example, and as shown in <FIG>, in an unsecured state, radially inward facing surface <NUM> of retaining ring <NUM> is not engaged with either of contacts 280A or 280B, or alternatively, is only engaged with one of contacts 280A and 280B. In the unsecured state, radially inward facing surface <NUM> is not engaged with both of contacts of 280A or 280B. As shown in <FIG>, in a properly secured state, radially inward facing surface <NUM> is engaged with both of contacts 280A and 280B. In some embodiments, retaining ring <NUM> comprises an electrically conductive material (e.g., metal). As such, retaining ring <NUM> completes the circuit between contacts 280A-B and IC <NUM> and causes RFID tag <NUM> to switch to a closed state (from an open state). Prior to completion of the circuit, namely, electrically connecting contact 280B directly with contact 280A, RFID tag <NUM> indicates an open status. When the circuit is completed (i.e., retaining ring <NUM> directly connects contact 280A and contact 280B as shown in <FIG>), an external device such as a RFID reader will detect that RFID tag <NUM> is in a closed state, thereby indicating that RFID fluid connection <NUM> is properly connected.

In some embodiments, RFID tag <NUM> is always enabled and can be detected and read by a RFID reader regardless of whether contacts 280A and 280B are connected. In such embodiments, when contacts 280A and 280B are not directly connected, for example via retaining ring <NUM>, RFID tag <NUM> is capable of transmitting, to a RFID reader, certain information. Such information may include, but is not limited to, a UID number (e.g., for the RFID tag, the tube end form, etc.), size number, model number, serial number, status of RFID tag <NUM> (i.e., open or closed), URL, station identification (i.e., manufacturing LOT number), date/time stamp, description, etc. Put another way, independent of whether contacts 280A and 280B are connected, RFID tag <NUM> will always transmit certain data (e.g., a UID number, a status, etc.) provided it is properly functioning. Thus, RFID tag <NUM> is preprogrammed to always transmit at least a UID number and a status (i.e., open or closed), for example, using hexadecimal data or a value. This is important because it allows the user to scan a given RFID tag to determine if it is properly functioning (i.e., if the RFID tag is properly transmitting data then it is properly functioning) as well as to determine its current state (i.e., open or closed). When contacts 280A and 280B are connected, for example, via retaining ring <NUM>, RFID tag <NUM> transmits data indicating a closed status. In some embodiments, RFID tag <NUM> indicates a first value (e.g., a first hexadecimal value) for an open state and a second value (e.g., second hexadecimal value) for a closed state, the second value being different from the first value. It should be appreciated that RFID tag <NUM> may include any programming suitable for indicating that it is properly functioning and a differentiation between an open state and a closed state, and that the present disclosure should not be limited to just the use of the hexadecimal system.

It should be appreciated that the RFID tags and assemblies described herein, for example, RFID tags <NUM><NUM>, and <NUM> and RFID assemblies <NUM>, <NUM>, and <NUM>, may utilize any suitable radio frequency range. In some embodiments, RFID tags <NUM><NUM>, and <NUM> comprise low frequency (LF) RFID tags operating in the <NUM> to <NUM> range, and have a read range of up to <NUM>. While LF RFID tags have a shorter read range and slower data read rate than other technologies, they perform better in the presence of metal or liquids (which can interfere with other types of RFID tag transmissions). Common standards for LF RFID include ISO <NUM> and ISO/IEC <NUM>-<NUM>. In some embodiments, RFID tags <NUM><NUM>, and <NUM> comprise high frequency (HF) RFID tags operating in the <NUM> to <NUM> range and provide reading distances of <NUM> to <NUM>. In such embodiments, RFID tags <NUM><NUM>, and <NUM> may even be near-field communication (NFC) tags since NFC technology is based on HF RFID. Common standards for HF RFID include ISO <NUM>, ECMA-<NUM>, ISO/IEC <NUM> (for NFC), ISO/IEC 14443A and ISO/IEC <NUM> (for MIFARE and other smart card solutions). In some embodiments, RFID tags <NUM><NUM>, and <NUM> comprise ultra-high frequency (UHF) RFID operating in the <NUM> to <NUM> range and provide reading distances of up to <NUM>. A well-known standard for UHF RFID is EPCglobal Gen2/ISO <NUM>-6C. Furthermore, in some embodiments, a single RFID reader is capable of detecting and receiving data from a plurality of RFID tags, not just one.

Claim 1:
A radio-frequency identification, RFID, fluid connection (<NUM>), comprising:
a fluid connector (<NUM>) comprising a through-bore (<NUM>), at least one radially inward facing surface (<NUM>, <NUM>) and a first radially outward facing surface (<NUM>) comprising a groove (<NUM>);
a tube (<NUM>) operatively arranged to be inserted into and connected to the fluid connector, the tube including a second radially outward facing surface (<NUM>) and a shoulder (<NUM>);
a retaining ring (<NUM>) operatively arranged to engage the fluid connector, the retaining ring arranged in the groove and including one or more protrusions (52A-52C) operatively arranged to extend through one or more apertures in the groove to engage the shoulder (<NUM>) of the tube; and
a RFID assembly (<NUM>, <NUM>, <NUM>) arranged on the second radially outward facing surface (<NUM>), including:
a RFID tag (<NUM>, <NUM>, <NUM>); and,
at least one contact (80A, 80B, <NUM>, 280A, 280B) electrically connected to the RFID tag;
wherein the one or more protrusions (52A-52C) of the retaining ring is operatively arranged to contact the at least one contact.