Training device for medical nasal applicators

Abstract

A nasal sprayer training device mimics the appearance and operating forces and sensations of a medicated nasal sprayer. The training device utilizes an annular collar with flexible fingers and an annular recess, and a plunger having ramped projections that selectively engage the flexible fingers and the annular recess to provide operating forces and sensations as the plunger is depressed from the reset position to a fully activated position. The device can be readily reset for reuse by pulling out on the plunger until an audible and sensory click or snap is heard and / or felt by the user, which signals to the user that the device is ready for reuse.

Description

TRAINING DEVICE FOR MEDICAL NASAL APPLICATORSPRIORITY CLAIM

[0001] The present disclosure claims priority to US provisional patent application 63 / 740975 filed December 31 , 2024, the contents of which are incorporated herein by reference.FIELD

[0002] The present invention relates to nasal sprayers and other medication units for administration of drugs or therapeutic liquids.BACKGROUND

[0003] Persons may have one or more medications to maintain their health. For example, persons with severe allergies may carry emergency medications, such as epinephrine nasal sprays, epinephrine auto-injectors, glucose tablets, and the like, so that they can self-administer the medications if they begin experiencing an adverse allergic reaction due to an exposure to allergens. However, self-administering medicated nasal sprays is usually an uncommon occurrence that requires unfamiliar actions including inserting a probe or tip into one's own nostril and applying sufficient compressive force to a plunger to break through a seal and then push a full dose of medication out through an orifice or nozzle. Such actions can be intimidating to users, particularly to children or to persons who are nervous or fearful because of their allergic reaction or because they are unfamiliar with the use of a medicated nasal sprayer.SUMMARY

[0004] An aspect of the specification provides a nasal sprayer training device including: a grip housing having a finger support shoulder; a hollow nasal projection extending in a first direction away from said finger support shoulder, and having an open base region proximate said grip housing; a plunger having a proximal end portion received in said nasal projection and a distal end portion extending in a second direction, opposite the first direction, away from said finger support shoulder, wherein said plunger is extendable and retractable in an axial direction relative to saidPage 1 of 15P13701PC00nasal projection; a collar at said grip housing, said collar having a proximal region at said grip housing and a distal region extending in the first direction into said base region of said nasal projection, wherein said plunger is extendable and retractable in said collar; said distal region of said collar including a plurality of spaced-apart fingers disposed in a circumferential arrangement around said plunger, and said proximal region of said collar defining an annular recess along an interior surface thereof; said proximal end portion of said plunger including a radial projection that is received in said annular recess when said plunger is in a fully reset position, and that engages at least one of said spaced-apart fingers as said plunger moves between the fully reset position and an activated position.

[0005] An aspect of the specification provides a nasal sprayer training device, wherein said radial projection includes a triangular wedge shape forming a shoulder at the proximal end.

[0006] An aspect of the specification provides a nasal sprayer training device 1 or claim 2, wherein said spaced-apart fingers are trapezoidal in shape, having narrower distal ends and wider base ends, and defining trapezoidal recesses having wider distal ends and narrower base ends.

[0007] An aspect of the specification provides a nasal sprayer training device, wherein said radial projection is aligned with one of said trapezoidal recesses.

[0008] An aspect of the specification provides a nasal sprayer training device, wherein said radial projection includes a trapezoidal shape having a narrower proximal end and a wider distal end, wherein the width of said wider distal end of said radial projection corresponds to the width of wider distal ends of said one of said trapezoidal recesses.

[0009] An aspect of the specification provides a nasal sprayer training device, including a plurality of said radial projections disposed circumferentially around said plunger in a spaced arrangement.

[0010] An aspect of the specification provides a nasal sprayer training device dependent on claims 3 or 4, wherein said radial projections are aligned with respective ones of said trapezoidal recesses.

[0011] An aspect of the specification provides a nasal sprayer training device, wherein said radial projection includes a trapezoidal shape having a narrower proximal end and a wider distal end,Page 2 of 15P13701PC00wherein the width of said wider distal ends of said radial projections correspond to the widths of wider distal ends of corresponding ones of said trapezoidal recesses.

[0012] An aspect of the specification provides a nasal sprayer training device, wherein said nasal projection is unitarily formed with said grip housing.

[0013] An aspect of the specification provides a nasal sprayer training device, further including a biasing member inside said nasal projection and configured to urge said plunger in the second direction toward the fully reset position.

[0014] An aspect of the specification provides a nasal sprayer training device, further including a post inside said nasal projection and extending in the second direction from said distal end portion, wherein said biasing member includes a coil spring disposed around said post.

[0015] An aspect of the specification provides a nasal sprayer training device, further including an annular collar receiver at said grip housing, said collar receiver including a radial inwardly-directed shoulder, wherein said collar includes a radial outwardly-extending base flange, and wherein said collar is configured to snap into said collar receiver by pressing said base flange through said shoulder of said collar receiver.

[0016] An aspect of the specification provides a nasal sprayer training device, wherein said collar receiver includes a resilient material and is configured to expand at said shoulder of said collar receiver in response to said base flange passing through said shoulder.

[0017] An aspect of the specification provides a nasal sprayer training device, wherein said collar includes a resilient material and is configured to expand in response to said radial projection(s) passing through said collar.

[0018] An aspect of the specification provides a nasal sprayer training device, wherein said plurality of spaced-apart fingers include a resilient material and are configured to flex radially outboard in response to said radial projection engaging one of said spaced-apart fingers.

[0019] An aspect of the specification provides a nasal sprayer training device, wherein said nasal projection is sized and shaped to constrain the radial outboard flexing of said one of said spaced- Page 3 of 15P13701PC00apart fingers. The present application is directed to sprayer training devices that mimic the appearance and operating forces and sensations that a user can expect to encounter when using a medicated nasal sprayer. The training device can be used, reset, and reused so that the user may become familiar with the handling and usage of an actual medicated nasal sprayer, potentially reducing the time required to administer a dose of liquid medication while increasing the chances that the full dose will be properly administered in one attempt. The training device may be used by patients who will potentially self-administer a nasal spray in the future, and may be used by medical professionals or caregivers who may be expected to administer a nasal spray to another person.

[0020] These and other objects, advantages, purposes, and features of this disclosure will become apparent upon review of the following specification in conjunction with the drawings.BRIEF DESCRIPTION OF THE FIGURES

[0021] FIG. 1 is a front perspective view of a nasal sprayer training device;

[0022] FIG. 2 is a perspective view of the nasal sprayer training device of FIG. 1 , shown mounted to an interior of an instructional support card;

[0023] FIG. 3 is a perspective view of an exterior of the instructional support card of FIG. 2;

[0024] FIGS. 4-7 are a sequence of cut-away side perspective views of the nasal sprayer training device of FIG. 1, showing interior structures as a plunger is moved from a reset position to an activated position;

[0025] FIGS. 4A-7A are respective side elevation views of the plunger and collar of FIGS. 4-7;

[0026] FIGS. 4B-7B are respective side elevation views of the plunger and collar of FIGS. 4-7, with a portion of the collar cut away to show underlying plunger structure; and

[0027] FIGS. 8 A and 8B are side elevation views of the nasal sprayer training device of FIG. 1 in activated and reset positions, with the grip housing partially cut away to show internal structures.Page 4 of 15P13701PC00DETAILED DESCRIPTION

[0028] Referring now to the drawings and illustrative embodiments depicted therein, a nasal sprayer training device 10 (FIGS. 1 and 2) allows a medical patient or medical professional to practice the use of a medicated nasal sprayer, such an epinephrine spray, before administering an actual dose of medicine to themselves or to another using the medicated nasal sprayer. Training device 10 has an exterior shape that closely matches that of a corresponding medicated nasal sprayer so that it feels the same or highly similar in a user's hand, and it includes a plunger 12 that moves relative to a grip housing 14 in the same manner as that of the corresponding medicated nasal sprayer. Internal structures of the training device 10 replicate the force- feedback or feel of the plunger of the corresponding medicated nasal sprayer, so that the user of training device 10 can form a realistic expectation of how the medicated nasal sprayer is operated and how it will feel in the user's hand, and against the patient's nose. The training device 10 may be mounted in an instruction card 16 (FIGS. 2 and 3) and can be readily reset for repeated uses to practice and become familiar with its use, so that the user will be prepared to use the medicated nasal sprayer when such use becomes medically necessary or advisable. Instruction card 16 includes a mounting clip 17 for the training device 10, and both written and pictorial instructions for its use. The training device 10 has a reduced parts-count compared to known training devices, and therefore may be less costly to manufacture.

[0029] Grip housing 14 of training device 10 has a pair of finger support shoulders 18 on opposite sides of a hollow nasal projection 20 that extends away from the finger support shoulders 18, such as shown in FIGS. 1, 2, 4, 5, 6, and 7. Hollow nasal projection 20 has an open base region 22 near where it meets the grip housing 14 (FIGS. 4, 5, 6, 7). A distal tip region 24 of the nasal projection 20 is narrowed to simulate the shape of a medicated nasal spray device. In some embodiments, unlike the nasal projection of a medicated nasal spray device, however, the nozzle or spray opening formed in the distal tip region 24 may be omitted, thus making training device 10 more suitable for repeated use and improving hygiene.

[0030] Plunger 12 has a proximal end portion 12a received in the nasal projection 20 and a distal end portion 12b extending away from the nasal projection 20 and the finger support shoulders 18. As will be described in more detail below, the plunger 12 is extendable and retractable in an axialPage 5 of 15P13701PC00direction relative to the nasal projection 20. A collar 26 is mounted to grip housing 14 and includes a distal region 26a with a plurality of spaced-apart fingers 28 extending into the proximal end portion 12a of nasal projection 20. A proximal region 26b is a continuous annular ring or sleeve located at the base of fingers 28, with a widened flange 29 that is captured in a collar-receiver 30 of grip housing 14, the collar-receiver 30 including a radial inwardly-directed shoulder 32 (FIGS.4, 5, 6, and 7). Proximal region 26b of collar 26 defines an annular recess 34 that selectively receives a plurality of projections or ramps 36 along the plunger's proximal end portion 12a, and provides a force-feedback during use as will be described in more detail below.

[0031] Plunger 12 is extendable and retractable through the collar 26, and includes a plurality of radially-outwardly-extending projections or ramps 36 in a circumferentially-spaced arrangement around the plunger's proximal end portion 12a, as best shown in FIGS. 4B, 5B, 6B, and 7B. The ramps 36 of the plunger are received in the annular recess 34 when the plunger is in the fully -reset position of FIGS. 1, 2, 4-4B, and 8B, and as best shown in FIG. 4B. The ramps 36 and annular recess 34 are sized and shaped to provide higher or elevated initial resistance to moving plunger 12 in an upward direction into the nasal projection 20, which simulates the break-through pressure of a medicated nasal spray device where initial movement of the plunger requires breaking open or breaking through a seal in order to begin dispensing the medication through the distal tip of the nasal projection.

[0032] Once the ramps 36 have exited the annular recess 34 of collar 26 the effort required to continue moving the plunger 12 (by pressing on distal end portion 12b, typically with the user's thumb) is reduced as the ramps 36 pass through the fingers 28 of the collar's distal region 26a (FIGS. 5- 5B). Although not depicted in FIGS. 5A and 5B, it will be appreciated that during this movement of plunger 12 the ramps 36 will cause at least some of the fingers 28 to flex or splay radially outward (FIG. 5), such that outer surfaces of the fingers 28 may contact and press against an inner surface of the nasal projection 20. The nasal projection 20 may be sized and shaped to constrain the radial outboard flexing of the spaced-apart fingers 28, thus influencing the force required to move the ramps 35 through the fingers 28. The collar 26 is typically made of a resilient resinous plastic material that can expand in response to the radial projections 36 passing through the collar 26, while the plunger 12 may also be made of resilient material and capable of radially compressing during the same movement. Once the ramps 36 have moved beyond the fingers 28Page 6 of 15P13701PC00the collar's resistance to movement of plunger 12 is at a minimum. However, a biasing member in the form of a coil spring 38, located inside the nasal projection 20 and pushing against the plunger 12, provides continuous resistance to the plunger's movement toward the fully activated position of FIGS. 7-7B and 8 A. Once the plunger 12 is in the fully activated position and then released by the user, spring 38 may push the plunger 12 back out by a limited distance so that the plunger's distal end portion 12b is easier to grasp for pulling and resetting the device. Coil spring 38 is positioned along a post 40 inside of nasal projection 20, the post 40 extending from the distal tip region 24 of the nasal projection 20 and partially into at least the proximal end portion 12a of the plunger 12. Post 40 aids assembly of the training device by supporting coil spring 38 in alignment and ensuring that the spring does not buckle in compression during use.

[0033] As best seen in FIGS. 4B, 5B, 6B, and 7B, ramps 36 have triangular wedge shapes forming shoulders in the proximal direction of plunger 12, the shoulders engaging an upper end of annular recess 34 when the plunger 12 is fully retracted to the reset position of FIGS. 4-4B and 8B. When viewed from the side as in FIG. 4B, ramps 36 can be seen to have a trapezoidal shape with a narrower end in the distal direction of plunger 12 and a wider end in the proximal direction of plunger 12.

[0034] The spaced-apart fingers 28 of collar 26 are also trapezoidal in shape, but with narrower distal ends and wider base or proximal ends where they meet the collar's proximal region 26b. The fingers 28 may also provide lateral stability for plunger 12 in the collar 26.

[0035] The spaced-apart fingers 28 thus define trapezoidal recesses 42 having wider distal ends and narrower base ends where they meet end at the collar's proximal region 26b. The trapezoidal shapes of the ramps 36 may be sized and shaped to correspond to the trapezoidal shapes of the recesses 42 at the recesses' distal ends so that the ramps 36 may initially slot in between the distal tips of the fingers 28 and may provide some resistance to rotation of the plunger 12 in the collar, while also reducing the initial increase in force of the collar 26 against pulling the plunger 12 back to the reset position. It will be appreciated that the dimensions of the collar 26 (including the fingers 38 and the annual recess 34) and the projections 36 may be altered to change the force and sensory feedback experienced by a user who is operating the training device 10. This allows a given training device to be "tuned" to mimic a particular medicated nasal spray device by changingPage 7 of 15P13701PC00only one or two components, typically just the collar 34, without affecting the outward appearance of the training device 10 and with only minimal tooling changes for a relatively small and inexpensive internal component of the device.

[0036] Training device 10 is designed with features that may reduce its cost while also allowing it to accurately simulate the operation of a medicated nasal sprayer. For example, nasal projection 20, post 40, and collar-receiver 30 may be unitarily formed of resinous plastic along with the other portions of grip housing 14, so that all of these components are of a one-piece design. Collar 26 and plunger 12 are separate components, with the plunger's distal end portion 12b being inserted into the collar's distal region 26a and then the collar 26 snapping into the collar- receiver 30 during assembly, with the spring 38 captured inside of nasal projection 20 and plunger 12. During assembly, collar-receiver 30 may expand and contract at the shoulder 32 in response to the collar's base flange 29 passing through the shoulder 32, thus retaining the collar 26 inside the collar receiver 30. The construction of the illustrated embodiment utilizes three molded plastic components, which may all be of the same material, and typically a metal coil spring, with a simple procedure for assembly. Moreover, training device 10 may be used, easily reset by pulling plunger 12 out until ramps 36 are again received into the collar's annular recess 34 with an audible and sensory click or snap, and reused many times without any change to the operation and sensory feedback provided to the user during test uses.

[0037] Training device 10 may be incorporated or used as part of a medication management system such as that described in co-pending U.S. provisional patent application, Ser. No.63 / 740,769, filed Dec. 31, 2024 and entitled "MANAGEMENT SYSTEM FOR MEDICATION", and any subsequent applications claiming priority thereto, all of which are hereby incorporated herein by reference in entirety.

[0038] Thus, the nasal sprayer training device mimics the appearance and operating forces and sensations of a medicated nasal sprayer, and can be used, reset, and reused many times to enable a user, such as a medical patient or medical care provided, to practice its use and experience the feel of the medicated nasal sprayer that it is designed to mimic.Page 8 of 15P13701PC00

[0039] Changes and modifications in the specifically described embodiments can be carried out without departing from the principles of the present invention which is intended to be limited only by the scope of the appended claims, as interpreted according to the principles of patent law including the doctrine of equivalents.

[0040] While certain embodiments have been discussed, it is to be understood that combinations, subsets, and / or variations of those embodiments are contemplated. For example, the training device can optionally include a trainer identifier that is detectable by an external case or holder to distinguish the device from a live, medicated unit. In one embodiment, a mechanical key formed on the exterior (e.g., a rib, notch, or flange) engages a complementary detent or micro-switch in the case to actuate a “trainer-present” switch without affecting the force profile of the plunger. In another embodiment, a magnetic element (e.g., a small permanent magnet, coded polarity pair, or magnetized ring) is embedded in the grip housing or collar and is detectable by a Hall-effect sensor or reed switch in the case; the polarity, spacing, or field strength can be selected to uniquely identify a trainer. In another embodiment, the trainer carries a simple electrical signature, such as a passive resistor or resistor ladder connected to exposed pads, a conductive band, or spring contacts positioned where the case provides corresponding terminals; when seated, the case measures the resulting resistance or RC time constant and classifies the device as a trainer. In still other embodiments, the identifier is optical (e.g., a high-contrast fiducial, barcode, or color patch at the base of the projection) readable by an optical sensor, or RF / near-field (e.g., NFC / RFID tag with a trainer code) readable by a corresponding reader in the case. The identifier may be integral to the molded parts (e.g., over-molded magnet, molded key geometry), adhered or press-fit after molding, or supplied as a removable insert that is installable for training and removable when the device is repurposed for demonstration without case interaction. In all variants, the identifier adds no medication pathway and does not alter the tactile “break-through” behavior; rather, it provides a passive, machine-detectable signature that allows an external case to suppress “dose-ready” indications, log training sessions, or otherwise recognize a training mode, while the training device itself remains fully functional as a stand-alone mechanical simulator.

[0041] In another variation, the trainer identifier may take the form of a mechanical keying feature that physically distinguishes the training device from a live medication unit. For example, the exterior of the grip housing, collar, or nasal projection may include one or more bosses, ribs, or Page 9 of 15P13701PC00keyed flanges that are dimensioned and positioned such that the training device can only be inserted into a case having a complementary slot or recess configured to receive those features. A case lacking the complementary slot physically prevents insertion of the trainer, thereby eliminating the possibility that the trainer could be misinterpreted as a live medication unit by an incompatible case. This arrangement provides a passive mechanical safeguard that ensures only cases designed to recognize trainers — i.e., cases equipped to interpret the associated key geometry or electrical identifier — can physically accept the trainer. The keying geometry can also serve as a failsafe for safety compliance or regulatory separation between trainer-only systems and live-medication systems, while maintaining backward compatibility for future case designs that incorporate the corresponding slot or keyed receptacle.

[0042] A person skilled in the art will appreciate that the present specification offers certain technical advantages over the prior art. For example, the training device achieves a highly realistic replication of the tactile and mechanical response of a medicated nasal sprayer while using a simplified, low-cost construction having as few as three molded components and a single spring. The annular collar and ramped plunger geometry generate a reproducible break-through force and return feel, enabling users to develop correct hand positioning and confidence in operation through repeated use. The device can be easily reset with an audible and tactile “click,” allowing for indefinite reuse without degradation of feedback characteristics.

[0043] Another advantage is that the internal force-feedback mechanism is purely mechanical and self-contained, requiring no fluid, pressurized cartridge, or complex assembly. This reduces failure points, manufacturing tolerances, and maintenance requirements, while ensuring consistency across training units. The modular collar design further allows selective tuning of force profiles to match different commercial nasal spray products without altering the outer housing, thereby supporting cross-brand or multi-product training using a single common platform.

[0044] A further advantage arises from the incorporation of optional trainer-identification features, including magnetic, electrical, optical, or mechanical identifiers. These identifiers permit external electronic cases or management systems to recognize when a trainer rather than a live medicated device is inserted, thereby preventing erroneous “dose-ready” indications or accidental event logging. In particular, the mechanical keying embodiments provide an additional safety advantagePage 10 of 15P13701PC00by physically preventing insertion of a trainer into incompatible medication cases. This ensures that a trainer cannot be mistaken for a live medication device and maintains clear separation between training and therapeutic equipment, improving user safety, system reliability, and regulatory compliance.

[0045] Connection relationships between elements are described herein using various terms, such as "coupled", "cooperate", "disposed", and the like. As used herein, connection relationships can be direct relationships and / or indirect relationships where one or more intervening elements are between the first and second elements.

[0046] Communications between elements are described herein using various terms, such as "communicate", "provide", "obtain", "communicatively coupled", etc. As used herein, communications can be direct communications and / or indirect communications through one or more intermediary elements. Further, communications can be constant communication and / or selective communication at periodic intervals, scheduled intervals, aperiodic intervals, and / or onetime events.

[0047] It should be understood that "including", "comprising", and "having" (and all other forms, such as tenses) are used herein to be open-ended terms. Thus, whenever a claim recites any form of "include", "comprise", or "have" (e.g., comprises, includes, has, comprising, including, having) as a preamble or within a claim recitation of any kind, it is to be understood that additional elements, terms, etc. may be present without falling outside the scope of the corresponding claim.

[0048] As used herein, singular references (e.g., "a", "an", "first", "second") do not exclude a plurality. The term "a" or "an" entity refers to one or more of that entity. The terms "a" (or "an"), "one or more", and "at least one" can be used interchangeably. The term "and / or" when used in a form such as, for example, A, B, and / or C refers to any combination or subset of A, B, C such as (1) A alone, (2) B alone, (3) C alone, (4) A with B, (5) A with C, (6) B with C, and (7) A with B and with C.Page 11 of 15P13701PC00

Claims

CLAIMS1. A nasal sprayer training device comprising:a grip housing having a finger support shoulder;a hollow nasal projection extending in a first direction away from said finger support shoulder, and having an open base region proximate said grip housing;a plunger having a proximal end portion received in said nasal projection and a distal end portion extending in a second direction, opposite the first direction, away from said finger support shoulder, wherein said plunger is extendable and retractable in an axial direction relative to said nasal projection;a collar at said grip housing, said collar having a proximal region at said grip housing and a distal region extending in the first direction into said base region of said nasal projection, wherein said plunger is extendable and retractable in said collar;said distal region of said collar comprising a plurality of spaced-apart fingers disposed in a circumferential arrangement around said plunger, and said proximal region of said collar defining an annular recess along an interior surface thereof;said proximal end portion of said plunger comprising a radial projection that is received in said annular recess when said plunger is in a fully reset position, and that engages at least one of said spaced-apart fingers as said plunger moves between the fully reset position and an activated position.

2. The nasal sprayer training device of claim 1, wherein said radial projection comprises a triangular wedge shape forming a shoulder at the proximal end.

3. The nasal sprayer training device of either claim 1 or claim 2, wherein said spaced-apart fingers are trapezoidal in shape, having narrower distal ends and wider base ends, and defining trapezoidal recesses having wider distal ends and narrower base ends.

4. The nasal sprayer training device of claim 3, wherein said radial projection is aligned with one of said trapezoidal recesses.Page 12 of 15P13701PC005. The nasal sprayer training device of claim 4, wherein said radial projection comprises a trapezoidal shape having a narrower proximal end and a wider distal end, wherein the width of said wider distal end of said radial projection corresponds to the width of wider distal ends of said one of said trapezoidal recesses.

6. The nasal sprayer training device of any preceding claim, comprising a plurality of said radial projections disposed circumferentially around said plunger in a spaced arrangement.

7. The nasal sprayer training device of claim 6 dependent on claims 3 or 4, wherein said radial projections are aligned with respective ones of said trapezoidal recesses.

8. The nasal sprayer training device of claim 7, wherein said radial projection comprises a trapezoidal shape having a narrower proximal end and a wider distal end, wherein the width of said wider distal ends of said radial projections correspond to the widths of wider distal ends of corresponding ones of said trapezoidal recesses.

9. The nasal sprayer training device of any preceding claim, wherein said nasal projection is unitarily formed with said grip housing.

10. The nasal sprayer training device of any preceding claim, further comprising a biasing member inside said nasal projection and configured to urge said plunger in the second direction toward the fully reset position.

11. The nasal sprayer training device of claim 10, further comprising a post inside said nasal projection and extending in the second direction from said distal end portion, wherein said biasing member comprises a coil spring disposed around said post.

12. The nasal sprayer training device of any preceding claim, further comprising an annular collar receiver at said grip housing, said collar receiver comprising a radial inwardly-directed shoulder, wherein said collar comprises a radial outwardly-extending base flange, and wherein said collar is configured to snap into said collar receiver by pressing said base flange through said shoulder of said collar receiver.

13. The nasal sprayer training device of claim 12, wherein said collar receiver comprises a resilient material and is configured to expand at said shoulder of said collar receiver in response to said base flange passing through said shoulder.Page 13 of 15P13701PC0014. The nasal sprayer training device of any preceding claim, wherein said collar comprises a resilient material and is configured to expand in response to said radial projection(s) passing through said collar.

15. The nasal sprayer training device of any preceding claim, wherein said plurality of spaced-apart fingers comprise a resilient material and are configured to flex radially outboard in response to said radial projection engaging one of said spaced-apart fingers.

16. The nasal sprayer training device of claim 15, wherein said nasal projection is sized and shaped to constrain the radial outboard flexing of said one of said spaced-apart fingers.Page 14 of 15P13701PC00

Images