An anti spill apparatus to contain liquid

Abstract

The present disclosure discloses an apparatus (100) to contain liquid. The apparatus includes a first bottom part (104) having a closed end (302) and another cylindrical end (304) having threads (306) at the outer surface of the cylindrical end (304). Further, the apparatus includes a cap (202) adapted to fix with the 5 first bottom part (104). The cap (202) includes a first cylindrical part (409) including a first flange (402) at a periphery of an inner surface of the first cylindrical part (409), a second cylindrical part (408) provided at a middle of the first cylindrical part (409), wherein the second cylindrical part (408) includes a second flange (406) at a periphery of an inner surface of the second cylindrical part (408), and wherein the first cylindrical part (409) includes two flanges (405a, 405b) connecting the second cylindrical part (408) with the first 10 cylindrical part (409).

Description

AN ANTI SPILL APPARATUS TO CONTAIN LIQUIDTECHNICAL FIELD

[0001] The present subject matter described herein is in the field portable apparatus that contain liquids. In particular, the present subject matter relates to an anti-spill apparatus to contain liquid.BACKGROUND

[0002] Conventional water bottle includes a cap and by removal of the cap water or any liquid contained therein flows. Thus conventional water bottles are prone water spilling if cap is not attached to the water bottle. Further, the conventional water bottle also has provision of two caps and water comes out after removal of both of the caps. Removal of two caps is inconvenient and require adequate amount of force.

[0003] US20190291926A1 discloses a portable, personal apparatus for transporting liquid having a bottle configured to contain liquid. The bottle has a longitudinal axis. A first opening open in a direction generally parallel with the longitudinal axis in a pour position. A first cover coupled to the bottle and configured to close the first opening in a closed position. A second opening open in a direction generally orthogonal with the longitudinal axis in a fill position. A second cover coupled to the bottle and configured to close the second opening in a storage position. The second cover remaining coupled to the bottle when the second cover is in the fill position.

[0004] US9771189B2 discloses a water bottle cap system combination that can be used with wide mouth water bottles or mason jars. The water bottle cap system includes a large cap portion and a small cap portion, which are coupled by a flexible strap. The small cap portion can be screwed onto the spout of the large cap portion, which is screwed onto the water bottle or mason jar. The small cap portion can be unscrewed from the spout and temporarily attached to the strap so that the small cap portion is out of the way of the spout, but still attached to the water bottle cap system, during drinking or pouring from the water bottle.

[0005] US9212067B2 According to the present invention, a fluid and / or aqueous additive delivery system is provided. According to the present invention, a modular fluid container is described for consumption of liquids. Fluid containers according to the present invention include any combination of four distinct modular components; (1) an end-point filter purification module for removal of impurities from water, (2) a UV purification module for emitting ultraviolet (UV) light in a germicidal spectrum for disinfection, (3) a tablet storage and dispensing module to emit ultraviolet (UV) light in a germicidal spectrum for disinfection of a volume of drink liquid held in the container, (4) a flow meter module for quantitatively monitoring hydration in real time. The user can personalize the bottle with any or all modules that are required.

[0006] NL2015890B1 discloses a portable dual-use water bottle, consisting of an upper cap, a bottle body and a lower bottom cap having a volume. The lower bottom cap is soft and is buckled to the lower portion of the bottle body by the lower bottom of the bottle body; furthermore, 5 an inner surface of the lower bottom cap and an outer surface of the lower portion of the bottle body are sleeved and fixed to each other by friction; or, convex ribs are provided on the lower portion of the bottle body, and corresponding concave grooves are provided on the lower bottom cap, so that the inner surface of the lower bottom cap and the outer surface of the lower portion of the bottle body are sleeved and fixed to each other by the convex ribs and the concave grooves.

[0007] However, aforesaid mention state of arts fails to provide any water bottle that is anti-spill and in which one of cap can be opened without use of hands and by applying very less pressure or force.OBJECTS OF THE DISCLOSURE

[0008] It forms an object of the present disclosure to overcome the aforementioned and other drawbacks / limitations in the existing solutions available in the form of related prior arts.

[0009] It is a primary object of the present disclosure an apparatus to hold liquid that is anti-spill.

[0010] It is another object of the present disclosure to provide an apparatus to hold liquid that includes two caps.

[0011] It is another object of the present disclosure to provide an apparatus to hold liquid in which one of two caps can be opened without the use of hands.

[0012] It is another object of the present disclosure to provide an apparatus to hold liquid in which one of two caps can be opened by applying very less force.

[0013] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.SUMMARY

[0014] A solution to one or more drawbacks of existing technology and additional advantages are provided through the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the disclosure.

[0015] The present disclosure offers a solution in the form of an apparatus to contain liquid. The apparatus includes a first bottom part having a closed end and another cylindrical end having threads at the outer surface and inner surface of the cylindrical end. Further, the apparatus includes an inner cap adapted to fix with the inner threads of the first part, wherein the inner cap includes, a first cylindrical part including a first flange at a periphery of an inner surface of the first cylindrical part, a second flange protruded outwards from the first cylindrical part and threads at the bottom end of the first cylindrical part. Further, the cap includes a second cylindrical part, wherein the second cylindrical part includes two cylindrical portions that are concentric along the same axis, and wherein the inner periphery of the outer cylindrical portion includes two or more flanges connecting the inner cylindrical portion with the outer cylindrical portion. Furthermore, the cap includes a spring housed in the second cylindrical part and rests on the second flange. Furthermore, the cap includes a third cylindrical part having a first circular flange consisting of two or more holes to accommodate the flow of liquid from the first part into the cap. A cylindrical body is protruded upwards from the inner surface of the first circular flange, wherein the cylindrical body is perpendicular to the first circular flange. A step shaped flange is protruded upwards along an offset distance from the periphery of the first circular flange. A third circular flange is protruded outwards at the lower end of the periphery of the step shaped flange, the upper surface of which acts as a stopper as the third cylindrical part is assembled with the first cylindrical part. Furthermore, the cap includes an insert having a first part and a second part, wherein the first part is perpendicular to the second part, wherein the second part of the insert is a step shaped hollow cylindrical flange wherein the step is protruded outwards in the upper portion of the second part , the lower surface of the upper portion of the second part rests on the upper surface of the inner cylindrical portion of the second cylindrical part and the lower portion of the second part is housed inside the inner periphery of the inner cylindrical portion of the second cylindrical part. Moreover, the apparatus includes a seal, a lower attachment part and an upper attachment part where in the seal is adapted to fit on the outer periphery of the step shaped flange of the third cylindrical part, the lower attachment part is adapted to tight fit over the circular body of the third cylindrical part and the upper attachment part is adapted to fit on the upper portion of the second part of the insert, wherein the first cylindrical part includes a step shaped flange protruded in a downward direction along a periphery of theinner surface of the first cylindrical part, wherein in a close position of the cap, the upper attachment part is connected with the flange, wherein in an open position of the cap, the first part of the insert presses the second cylindrical part against the spring, which in turn moves the upper attachment part in a downward direction and create an opening between the upper attachment part and the flange, wherein the opening is adapted to provide a flow of liquid from the cap to the user.

[0016] In an aspect of the invention, in the close position of the cap, a cavity is formed inside the first cylindrical part and between the lower attachment part and the first part of the insert.

[0017] In an aspect of the invention, in a close position of the inner cap, the outer periphery of the seal 316 is in contact with curved flange 448 of the first bottom part 104 to prevent the leakage of liquid from the first bottom part 104.

[0018] In an aspect of the invention, the apparatus is adapted to switch from the close position to the open position when an external force or pressure is applied on the top surface of the first part of the insert.

[0019] In an aspect of the invention, the top part of insert includes at least one hole to provide a flow of liquid from the top part of the insert to the first bottom part when a force is applied to the top part in a downward direction.

[0020] In an aspect of the invention, the apparatus includes a second cap that includes a circular side surface and a top surface, wherein an inner surface of the circular side surface include threads adapted to fix the second cap with the outer threads of the first bottom part.

[0021] In an aspect of the invention, the second cap includes a circular body protruded downwards from the lower end of the top surface, wherein the circular body presses the insert & second cylindrical part assembly downwards to push the lower attachment part, thus closing the flow of liquid from first bottom part to cap.

[0022] In an aspect of the invention, the second cap includes a seal at an inner surface of the top surface, and wherein the seal is adapted to connect with an upper part of the step shaped flange.

[0023] In an aspect of the invention, the upper attachment portion includes a top surface having curved periphery protruded in a downward direction, a hole provided at a center of the top surface, wherein in the close position, the curved periphery of the top surface of the upper attachment portion is in contact with a lower portion of the step shaped flange.

[0024] In an aspect of the invention, an outer surface of the first cylindrical part includes a plurality of ribs to strengthen the first cylindrical part and to provide a better grip to open or fix the cap with the first bottom part.

[0025] In an aspect of the invention, in the open position, the first part of the insert rests on the second cylindrical part, and wherein, the upper attachment part is adapted snap fit to the inwardly protruded portion of the insert.

[0026] In an aspect of an invention, a diameter of the outer cylindrical part is less than a diameter of the second cap.

[0027] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS

[0028] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the present disclosure may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:

[0029] Fig. la illustrates a front view of an apparatus to contain liquid according to the present disclosure;

[0030] Fig. lb illustrates a cross sectional view of the apparatus to contain liquid according to the present disclosure;

[0031] Fig. 2 illustrates a cross sectional view of the apparatus having two caps and apparatus being in a close position according to the present disclosure;

[0032] Fig. 3 illustrates an exploded view of the apparatus according to the present disclosure.

[0033] Fig. 4 illustrates a cross sectional view of the apparatus having two caps and apparatus according to the present disclosure;

[0034] Fig. 4a illustrates a cross sectional view of the apparatus having two caps with inner cap in a close position and upper cap in an unfitted position according to the present disclosure;

[0035] Fig. 4b illustrates a cross sectional view of the apparatus having two caps with inner cap in a close position and upper cap in a fitted position according to the present disclosure;

[0036] Fig. 4c illustrates a cross sectional view of the apparatus with inner cap in an open position according to the present disclosure;

[0037] Fig. 5a-b illustrates multiple view of the outer cap of the apparatus according to the present disclosure;

[0038] Fig. 6a-b illustrates multiple view of the first cylindrical part of the inner cap of the apparatus according to the present disclosure;

[0039] Figs. 7a-c illustrate multiple view of third cylindrical part (having multiple holes) of the inner cap of the apparatus according to the present disclosure;

[0040] Fig. 8 a illustrates a perspective view of the insert of the inner cap according to the present disclosure;

[0041] Fig. 8b illustrates a perspective view of the second cylindrical part of the inner cap according to the present disclosure;

[0042] Fig. 9a illustrates a perspective view of the upper attachment part of the inner cap according to the present disclosure;

[0043] Fig. 9b illustrates a perspective view of the lower attachment part of the inner cap according to the present disclosure;

[0044] Fig. 10 illustrates a perspective view of the spring of the inner cap according to the present disclosure.

[0045] Fig. 11 illustrates an application of the apparatus in closed position where the user lips are not in contact with the inner cap.

[0046] Fig. 12 illustrates an application of the apparatus in open position where the user lips are in contact with the inner cap.

[0047] The figures depict embodiments of the present subject matter for illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.DETAILED DESCRIPTION OF INVENTION

[0048] The detailed description of various exemplary embodiments of the disclosure is described herein with reference to the accompanying drawings. It should be noted that the embodiments are described herein in such details as to communicate the disclosure. However, the amount of details provided herein is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure.

[0049] It is also to be understood that various arrangements may be devised that, although not explicitly described or shown herein, embody the principles of the present disclosure. Moreover, all statements herein reciting principles, aspects, and embodiments of the present disclosure, as well as specific examples, are intended to encompass equivalents thereof.

[0050] It should also be noted that in some alternative implementations, the functions / acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may be executed concurrently or may sometimes be executed in the reverse order, depending upon the functionality / acts involved.

[0051] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which example embodiments belong. It will be further understood that terms, e.g., those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0052] In the following detailed description of the embodiments of the disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the disclosure may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.

[0053] Hereinafter, a description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the present disclosure.

[0054] Fig. 1 illustrates a front view of an apparatus to contain liquid according to the present disclosure. The apparatus 100 includes a top part 102 and a first bottom part 104. The first bottom part 104 is adapted to contain liquid and the top part 102 is attached at top of the first bottom part 104. Details of the top part 102 are explained with the help of Figs. 2-10.

[0055] Fig. 2 illustrates a cross sectional view of the apparatus 100 to contain liquid according to the present disclosure. The apparatus 100 includes a first bottom part 104 and a top part. The top part includes an outer cap 202 and an inner cap 204.

[0056] Fig. 3 illustrates an exploded view of the apparatus 100 to contain liquid according to the present disclosure. The apparatus 100 includes a first bottom part 104 and a top part. The top part includes an outer cap 202 and the inner cap 204 is an assembly of first cylindrical part 302, an insert 304, an upper attachment part 306, a second cylindrical part 308, a spring 310, a lower attachment part 312, a third cylindrical part 314 and a seal 316. The first bottom part 104 having a closed end 318 and another cylindrical end 320 having threads 322 at the outer surface of the cylindrical end 320 and threads 324 at the inner surface of the cylindrical end 320. Further, the inner cap 204 includes a first cylindrical part 302 that is adapted to fix with the first bottom part 104 on the threads 324 at the inner surface of the cylindrical end 320. The outer cap 202 includes a circular side surface and a top surface, wherein an inner surface of the circular side surface include threads adapted to fix the outer cap with the first bottom part 104 on the threads 322 at the outer surface of the cylindrical end 320. Details of components of apparatus 100 are also explained with the help of Fig. 3.

[0057] In an embodiment, the anti-spill apparatus (100) to contain liquid, comprises a first bottom part (104) configured to hold liquid and having a cylindrical end (320) provided with inner threads (324) and outer threads (322); a dual-cap assembly including an inner cap (204) and an outer cap (202), wherein the inner cap (204) is threadably coupled with the inner threads (324) of the first bottom part (104), and the outer cap (202) is threadably coupled with the outer threads (322) of the first bottom part (104). The the inner cap (204) comprises: a movable insert (304) configured to be displaced by an external force applied by a user, a biasing spring (310) arranged within the inner cap (204) to normally maintain a sealed condition, a sealing assembly including at least one seal (316) and at least one attachment member (306, 312) cooperating to prevent leakage of liquid in a closed position, and at least one flow passage configured to establish liquid communication between the first bottom part (104) and an outlet of the inner cap (204) when said insert (304) is displaced against the bias of the spring (310). The the inner cap (204) is configured such that a minimal external force applied to said insert (304) compresses said spring (310), thereby displacing the sealing assembly from the closed position to an open position to permit flow of liquid through the flow passage, and wherein release of said external force allows said spring (310) to automatically restore the sealing assembly to the closed position, thereby preventing spillage of liquid.

[0058] The anti-spill apparatus (100) is enabled through an integrated assembly that combines the first bottom part (104) with a dual-cap structure comprising the inner cap (204) and the outer cap (202). The first bottom part (104) includes a cylindrical end (320) provided with both inner threads (324) and outer threads (322) so that the two caps can be independently secured, forming a compact and leak-proof configuration. The inner cap (204) serves as the primary anti-spill module, incorporating a movable insert (304), a biasing spring (310), and a sealing assembly composed of a seal (316) and attachment members (306, 312). The spring (310) is positioned such that it constantly biases the insert (304) upward, keeping the sealing assembly pressed tightly in a closed state against the liquid contained within the first bottom part (104). When minimal external force — such as the gentle pressure of a user’s lips or fingers — is applied to the upper surface of the insert (304), the insert moves downward against the biasing force of the spring (310). This downward motion opens a flow passage within the cap that allows liquid to move from the first bottom part (104) through the inner cap (204) toward the outlet. Upon release of the applied force, the spring (310) restores the insert to its initial position, resealing the system automatically. The interaction of these elements enables hands-free or low-effort actuation without spillage. Figures 4a through 4c and Fig. 12 of the drawings illustrate this mechanical sequence, showing the closed, open, and return positions achieved solely through spring-biased actuation and precise sealing geometry.

[0059] In an embodiment, the inner cap (204) comprises a first cylindrical part (302) provided with a first flange (408) on an inner surface and a second flange (410) protruded outward to rest on a top edge (440) of the cylindrical end (320) of the first bottom part (104), said second flange (410) forming a support for the biasing spring (310). The inner cap (204) includes a first cylindrical part (302) that serves both as a mechanical housing and as a structural member supporting the spring (310) and the sealing assembly. This first cylindrical part (302) is formed with a first flange (408) extending along the inner periphery and a second flange (410) protruding outwardly. The second flange (410) is dimensioned and positioned to rest securely upon the upper edge (440) of the cylindrical end (320) of the first bottom part (104). This configuration ensures that the spring (310), seated above the second flange (410), transmits axial load evenly during compression and decompression. The first flange (408), located internally, functions as a mating seat for the curved periphery (418) of the upper attachment part (306). When the insert (304) is in its rest position, the curved periphery (418) presses firmly against the flange (408), forming a fluid-tight closure. The relationship between the first flange (408) and the curved periphery (418) creates a reliable sealing interface that prevents micro-leakage while enabling consistent alignment of components. The dualflange configuration, shown in Figs. 4b and 4c, thus provides both mechanical rigidity and precision sealing necessary for repeated operation.

[0060] In an embodiment, the inner cap (204) further comprises a second cylindrical part (308) having two concentric cylindrical portions (420, 424), an inner periphery of said outer cylindrical portion (424) being provided with a plurality of connecting flanges (422A-422D) linking said inner cylindrical portion (420) and said outer cylindrical portion (424) to maintain structural rigidity while allowing flow passage therebetween. The second cylindrical part (308) of the inner cap (204) enables internal support, component alignment, and controlled fluid flow. The second cylindrical part (308) comprises two concentric cylindrical portions (420, 424) that are structurally linked by radially extending flanges (422A-422D). This concentric arrangement allows the inner cylindrical portion (420) to act as a spring guide while the outer cylindrical portion (424) interfaces with the surrounding components of the cap. The connecting flanges (422A-422D) provide mechanical strength and maintain parallel alignment of the two portions, while also creating openings between them that allow fluid and air equalization during actuation. The spring (310) is concentrically housed around the inner cylindrical portion (420), ensuring guided compression without lateral displacement. This design minimizes friction, preserves axial stability, and guarantees repeatable motion of the insert (304). Figures 8a and 8b clearly demonstrate this double-wall construction and the flanged interconnection that together enable a mechanically balanced and fluid-compatible support architecture.

[0061] In an embodiment, the inner cap (204) further comprises a third cylindrical part (314) having a first circular flange (426) with multiple holes (702A-702N) for liquid flow, a step-shaped flange (428) protruded upward from the periphery of the circular flange (426), and a third circular flange (430) extending outwardly at a lower end of said step-shaped flange (428). The lower part of the inner cap (204) includes a third cylindrical part (314), which functions as the fluid inlet and lower sealing interface. The third cylindrical part (314) includes a first circular flange (426) provided with multiple holes (702A-702N) that serve as fluid conduits connecting the first bottom part (104) with the internal cavity of the cap. Upwardly extending from the outer edge of this circular flange (426) is a step-shaped flange (428), which forms the structural base for mounting the seal (316). At the lower end of the step-shaped flange (428) is a third circular flange (430) that projects radially outward and acts as a physical stop during assembly, preventing over-insertion and ensuring consistent spacing between sealing surfaces. The geometry of this lower section provides the functional foundation for fluid passage and sealing performance. Figures 7a through 7c depict the detailed design of this third cylindrical part (314), showing the arrangement of fluid holes, the step-flange configuration, and the circular stops that collectively control the opening and closing behavior of the apparatus.

[0062] In an embodiment, the seal (316) is positioned along the outer periphery of said step-shaped flange (428), the outer edge of said seal (316) contacting a curved flange (448) on the first bottom part (104) to prevent leakage of liquid when the apparatus (100) is in the closed position. The seal (316) plays a crucial role in maintaining a liquid- tight closure between the inner cap (204) and the first bottom part (104). It is disposed circumferentially around the outer periphery of the step-shaped flange (428) and interfaces directly with the curved flange (448) formed at the upper interior region of the first bottom part (104). This dual-contact geometry provides redundant sealing — one along the inner curve of the flange (448) and the other along the outer surface of the step-shaped flange (428). The seal (316) is preferably composed of a soft elastomeric material capable of restoring its shape after repeated compression cycles. During closure, the compression of the seal forms a continuous barrier that prevents leakage, even when the bottle is shaken or inverted. The tight fit and elasticity of the seal enable tolerance absorption for dimensional variations and thermal expansion. Figures 4b and 4c illustrate the location of the seal (316) and demonstrate how it is compressed between the curved flange (448) and the third cylindrical part (314) to maintain leak-proof performance in both static and dynamic conditions.

[0063] In an embodiment, said sealing assembly includes a lower attachment part (312) having a flexible membrane (432) and a hollow cylindrical body (434) protruding downward, said body (434) being fitted over a cylindrical projection (436) of the third cylindrical part (314) to provide dynamic sealing during vertical actuation. The lower attachment part (312) of the inner cap (204) provides a flexible link between the static sealing surface and the movable insert assembly. It includes an elastic membrane (432) and a downwardly extending hollow cylindrical body (434). The hollow cylindrical body (434) is configured to fit tightly over the cylindrical body (436) of the third cylindrical part (314), establishing a snug but flexible interface that prevents lateral movement while permitting axial flexure. When the insert (304) is actuated downward, pressure is transmitted through the second cylindrical part (308) to the lower attachment part (312), causing the membrane (432) to deflect slightly. This movement allows the liquid channel beneath the membrane to open momentarily and direct the fluid through the holes (702A-702N). When the force is released, the elasticity of the membrane (432) returns it to its initial position, resealing the passage. This flexible behavior is essential to accommodate variations in internal liquid pressure without compromising seal integrity. Figure 9b illustrates the interaction between the lower attachment part (312), the flexible membrane (432), and the underlying third cylindrical part (314), showing how they cooperate to achieve self-restoring closure.

[0064] In an embodiment, said sealing assembly further includes an upper attachment part (306) having a top surface with a curved periphery (418) extending downward and a central hole, said curved periphery (418) engaging a step-shaped flange (408) on the inner surface of the first cylindrical part (302) to block liquid flow in the closed position. The upper attachment part (306) forms the upper boundary of the sealing system and defines the actuation interface with the insert (304). It has a top surface incorporating a curved periphery (418) and a central outlet hole. The curved periphery (418) is shaped to correspond precisely with the inner contour of the step-shaped flange (408) formed on the first cylindrical part (302). In the closed position, the curved periphery (418) maintains firm contact with the flange (408), ensuring that no liquid escapes upward. The central hole serves as the outlet path when the seal is momentarily disengaged. The design of the curved periphery (418) ensures uniform pressure distribution along the entire sealing circumference, thus avoiding localized wear or leakage. Figure 9a provides a clear depiction of the upper attachment part (306), its concave curvature, and the manner in which it interfaces with the adjacent flanged surface of the first cylindrical part (302).

[0065] In an embodiment, upon downward displacement of said insert (304), the upper attachment part (306) moves downward to form an annular opening between said curved periphery (418) and said flange (408), allowing liquid to flow upward through the central hole of said upper attachment part (306). Duringactuation, when the user applies pressure on the insert (304), the spring (310) compresses, and the entire assembly comprising the insert (304), second cylindrical part (308), and upper attachment part (306) moves downward. This downward displacement creates an annular gap between the curved periphery (418) of the upper attachment part (306) and the flange (408) of the first cylindrical part (302). Through this gap, liquid flows upward from the cavity within the third cylindrical part (314), through the holes (702A-702N), and then toward the outlet. The system is designed such that the liquid flow begins only when sufficient compression has occurred to disengage the seal, thus providing precise control over the initiation of flow. When pressure is released, the spring (310) expands and restores the curved periphery (418) back into sealing contact with the flange (408). Figures 4c and 12 vividly illustrate this functional transition, where the dotted lines represent liquid flow during the open state, confirming the responsive yet self-closing action of the anti-spill mechanism.

[0066] In an embodiment, the outer cap (202) includes a circular side surface (502) provided with internal threads (406) for engagement with the outer threads (322) of the first bottom part (104), and a top surface (504) having a circular body (404) protruding downward to apply compressive force on the inner cap (204) in the closed condition. The outer cap (202) constitutes the secondary closure assembly of the anti-spill apparatus (100), providing both mechanical protection and environmental sealing for the inner cap (204). The outer cap (202) comprises a circular side surface (502) having internal threads (406) that mate with the outer threads (322) of the cylindrical end (320) of the first bottom part (104). This dual-thread arrangement ensures that the outer cap (202) can be independently secured or removed without disturbing the position of the inner cap (204). The top surface (504) of the outer cap (202) is formed integrally with a downwardly projecting circular body (404) that functions as a compressive actuator when the cap is tightened. Upon engagement, the circular body (404) bears against the upper portion of the insert (304) or the second cylindrical part (308), transmitting uniform downward pressure to stabilize the internal components. This arrangement not only seals the apparatus during transport but also prevents unintentional actuation of the inner cap (204). Figures 5a and 5b illustrate the outer cap (202), showing the positioning of the threads (406), the top surface (504), and the downward extension (404) which aligns concentrically with the central axis of the bottle to apply uniform axial force during closure.

[0067] In an embodiment, the downwardly protruded circular body (404) of the outer cap (202) presses the insert (304) and the second cylindrical part (308) assembly downward, thereby urging said lower attachment part (312) against said third cylindrical part (314) to seal the flow passage. When the outer cap (202) is fully tightened over the first bottom part (104), the downwardly protruding circular body (404) of the top surface (504) comes into direct contact with the upper portion of the insert (304) and the surrounding second cylindrical part (308). This contact pushes the assembly downward, compressing the lower attachment part (312) against the third cylindrical part (314). The flexible membrane (432) of the lower attachment part (312) thereby seats firmly against the sealing flange (428), closing all fluid paths from the first bottom part (104) to the inner cap (204). The interaction between the circular body (404) and the insert (304) ensures that no fluid can pass through the flow passages when the outer cap (202) is in its locked position. This sealing effect also stabilizes the spring (310) under slight compression, allowing the apparatus to resist vibration, pressure variation, or accidental knocks during transportation. Figure 4b illustrates this condition, where the outer cap (202) is in its fitted position and the inner cap (204) remains completely sealed, demonstrating the locking and isolation functions of the outer cap’s internal projection (404).

[0068] In an embodiment, the top surface (504) of the outer cap (202) includes an internal seal adapted to engage an upper portion of said step-shaped flange (428), thereby providing an airtight closure when the outer cap (202) is fully fitted. The top surface (504) of the outer cap (202) may further include an internal sealing element or gasket positioned concentrically along the inner face of the cap. This internal seal isadapted to engage with the upper portion of the step-shaped flange (428) or the adjoining section of the inner cap (204), thereby creating an airtight enclosure when the outer cap (202) is tightened. The sealing ring may be formed from silicone or a similar elastomeric material that conforms to the flange surface, ensuring dust and vapor isolation. This secondary sealing barrier prevents evaporation of the liquid contained in the first bottom part (104) and keeps the internal environment sterile. Figures 4b and 5b support this structure, indicating that the sealing ring resides directly above the flange interface, ensuring a dual-layered sealing mechanism — one mechanical, created by the threaded connection, and another elastic, created by the gasket contact.

[0069] In an embodiment, the first cylindrical part (302) includes a plurality of external ribs (602A- 602N) on its outer surface (604) to reinforce the part and provide an enhanced manual grip for attachment or removal. The first cylindrical part (302) of the inner cap (204) may be reinforced through a series of longitudinal ribs (602A-602N) provided on its outer surface (604). These ribs serve a dual purpose: they enhance the structural rigidity of the part by distributing mechanical stress uniformly and simultaneously provide tactile grip to the user during installation or removal. The ribs may be evenly spaced around the circumference and may extend partially or fully along the height of the cylindrical surface. The rib design also minimizes the possibility of slippage during tightening, particularly in humid conditions. Figure 6a shows the distribution of these ribs, while Figure 6b demonstrates how the ribbed exterior contributes to ergonomic handling and reinforces the cylindrical wall against radial deformation during thread engagement.

[0070] In an embodiment, wherein, in an open position, the first part (414) of said insert (304) rests upon the second cylindrical part (308), and said upper attachment part (306) is snap-fitted to an inwardly protruded portion of the insert (304) to stabilize its open configuration. When the apparatus (100) is actuated to its open position, the first part (414) of the insert (304) moves downward and comes to rest on the upper surface of the second cylindrical part (308). At this stage, the upper attachment part (306) remains coupled to the insert (304) through a snap-fit connection formed at an inwardly protruded portion of the insert. This engagement stabilizes the relative positioning of the components and prevents the upper attachment part (306) from dislodging or vibrating during use. The snap-fit configuration also ensures that the travel distance of the insert (304) remains precisely limited, preventing over-compression of the spring (310). The engagement between the insert and the second cylindrical part is carefully dimensioned to align with the elastic limit of the spring, ensuring smooth operation under minimal applied force. Figures 4c and 12 illustrate the open position, showing how the downward motion of the insert maintains mechanical continuity while permitting fluid passage through the annular gap formed between the curved periphery (418) and the flange (408).

[0071] In an embodiment, wherein the diameter of said outer cylindrical portion (424) of the second cylindrical part (308) is smaller than the outer diameter of said outer cap (202), allowing compact nesting and enhanced aesthetic finish. The outer cylindrical portion (424) of the second cylindrical part (308) is intentionally designed to have a smaller diameter than the outer diameter of the outer cap (202). This dimensional differentiation allows the inner cap assembly to nest seamlessly within the neck region of the first bottom part (104) without creating protrusions or interference. The compact profile contributes to aesthetic appeal and also reduces material weight. Functionally, the smaller diameter ensures clearance between the second cylindrical part (308) and the inner wall of the outer cap (202), which accommodates small dimensional variations due to manufacturing tolerances. Moreover, the proportional sizing between these parts ensures that when the outer cap (202) is screwed on, its internal projection (404) aligns concentrically with the insert (304), ensuring uniform compression and sealing. This proportional geometry is demonstrated in the section views of Figures 4b and 4c, where the spacing between the outer wall of the second cylindrical part and the inner surface of the outer cap can be observed.

[0072] In an embodiment, said biasing spring (310) is a helical compression spring concentrically positioned about said inner cylindrical portion (420), configured to bias said insert (304) upward to automatically return the inner cap (204) to the closed position. The biasing spring (310) is configured as a helical compression spring concentrically arranged around the inner cylindrical portion (420) of the second cylindrical part (308). The spring exerts an upward biasing force that keeps the insert (304) and the upper attachment part (306) in their default closed positions. When the user applies downward pressure, the spring (310) compresses linearly, allowing the insert to descend and open the fluid pathway. The spring constant is carefully selected such that the required actuation force remains minimal — sufficiently low to permit operation by lip pressure or fingertip contact, yet strong enough to automatically return the mechanism to the sealed state. The concentric placement of the spring ensures even compression and prevents skewing of the insert during actuation. Figure 10 illustrates the helical spring (310), showing its positioning around the cylindrical guide (420) and the manner in which it cooperates with the adjacent flanges to generate restoring force upon release.

[0073] In an embodiment, a minimal external force applied to the insert (304) is produced by contact of human lips or fingers, the apparatus (100) thereby enabling hands-free actuation for dispensing liquid without spillage. The anti-spill apparatus (100) is particularly engineered for ergonomic and low-pressure actuation. The geometry of the insert (304), its first part (414), and the spring (310) together ensure that only a minimal external force — such as that exerted by the user’s lips during sipping or by a gentle press of the finger — is sufficient to compress the spring (310) and open the flow passage. This design eliminates the need for twisting or unscrewing actions and allows single-handed or hands-free operation. The balance between the spring’s resistance and the mechanical leverage of the insert (304) ensures responsive motion without accidental actuation. Figures 11 and 12 exemplify this behavior: in Fig. 11, the inner cap (204) remains closed as the user’s lips are spaced apart from the insert, while in Fig. 12, light pressure from the lips depresses the insert, activating the flow mechanism. The result is an intuitive, spill-free drinking experience that resets automatically after every use.

[0074] In an embodiment, in a closed position, the user’s lips remain spaced apart from the inner cap (204), and in an open position, the user’s lips contact the first part (414) of the insert (304) to press the insert (304) downward and establish flow of liquid through the flow passage. In the closed position of the anti-spill apparatus (100), the user’s lips remain spaced apart from the upper surface of the inner cap (204), ensuring that no direct contact occurs between the lips and the sealing zone. This prevents contamination and maintains hygienic operation. When the user intends to drink, the lips come in contact with the first part (414) of the insert (304). The gentle pressure exerted by the lips pushes the insert (304) downward, compressing the spring (310) and creating the flow path through the openings and annular passage previously described. As soon as the user releases the pressure, the spring (310) expands, returning the insert (304) to its raised position and re-establishing full sealing contact at the curved periphery (418) and flange (408). This design ensures that liquid flow is initiated and terminated precisely in response to user interaction, with zero spillage or residual dripping. Figures 11 and 12 illustrate these operating states, showing that the position of the user’s lips relative to the insert controls the entire dispensing mechanism without requiring manual handling of the cap or bottle.

[0075] Fig. 4a illustrates a cross sectional view of the apparatus having two caps and apparatus fitted with inner cap 204 being in a close position and outer cap 202 in an unfitted position according to the present disclosure.

[0076] Fig. 4b illustrates a cross sectional view of the apparatus having two caps and apparatus fitted with inner cap 204 being in an position according to the present disclosure.

[0077] Fig. 4c illustrates a cross sectional view of the apparatus having inner cap and apparatus fitted with inner cap 204 being in an open position and outer cap 202 in a dismantled position according to the present disclosure.

[0078] Further, the cap 204 includes a first cylindrical part 302 including a first flange 408 at a periphery of an inner surface of the first cylindrical part, a second flange 410 protruded outwards from the first cylindrical part that rests on the top edge 440 of the cylindrical end 320 of first bottom part 104 in a close position of the inner cap 204. The first cylindrical part 302 also includes threads 438 at the bottom end to accommodate fitment with the threads 442 at the inner surface of the cylindrical end 320.

[0079] Further, the inner cap 204 includes a second cylindrical part 308, wherein the second cylindrical part includes two cylindrical portions 420 and 424 that are concentric along the same axis, and wherein the inner periphery of the outer cylindrical portion includes two or more flanges 422 connecting the inner cylindrical portion with the outer cylindrical portion.

[0080] Furthermore, the cap 204 includes a third cylindrical part 314 having a first circular flange 426 consisting of two or more holes to accommodate the flow of liquid from the first bottom part 104 into the cap 204. A cylindrical body 436 is protruded upwards from the centre of the upper surface of the first circular flange, wherein the cylindrical body 436 is perpendicular to the first circular flange 426. A step shaped flange 428 is protruded upwards along an offset distance from the periphery of the first circular flange 426. A third circular flange 430 is protruded outwards at the lower end of the periphery of the step shaped flange, the upper surface of which acts as a stopper as the third cylindrical part 314 is assembled inside the inner surface of the first cylindrical part 302 at the bottom.

[0081] Furthermore, the cap 204 includes an insert having a first part 414 and a second part 416, wherein the first part 414 is perpendicular to the second part 416, wherein the second part 416 of the insert is a step shaped hollow cylindrical flange wherein the step is protruded outwards in the upper portion 444 of the second part , the lower surface of the upper portion 444 of the second part rests on the upper surface of the inner cylindrical portion 420 of the second cylindrical part 308 and the lower portion 446 of the second part is tight fit inside the inner periphery of the inner cylindrical portion 420 of the second cylindrical part 308.

[0082] Moreover, the apparatus includes a seal 316, a lower attachment part 312 and an upper attachment part 306 where in the seal 316 is adapted to fit on the outer periphery of the step shaped flange 428 of the third cylindrical part, the lower attachment part 312 is adapted to tight fit over the circular body of the third cylindrical part 314 and the upper attachment part 306 is adapted to fit on the upper portion 444 of the second part 416 of the insert 304, wherein the first cylindrical part 302 includes a step shaped flange 408 protruded in a downward direction along a periphery of the inner surface of the first cylindrical part, wherein in a close position of the cap, the curved periphery 418 of the upper attachment part 314 is connected with the step shaped flange 408 of the first cylindrical part.

[0083] In an aspect of the invention, as illustrated in Fig. 4c wherein an open position of the cap, the first part of the insert 414 presses the assembly of insert and second cylindrical part 304 against the spring 310, which in turn moves the curved periphery 418 of the upper attachment part 306 in a downward direction and create an opening between the upper attachment part 306 and the flange 408, wherein the opening is adapted to provide a flow of liquid from the cap 204 to the user.

[0084] In an aspect of the invention, the inner cap 204 includes a lower attachment part 312 having a flexible membrane 432 and a hollow cylindrical body 434 protruding downwards from the membrane which is adapted to fit over the cylindrical body 436 of the of the third cylindrical part 314.

[0085] In an aspect of the invention, in a close position of the inner cap, the outer periphery of the seal 316 is in contact with curved flange 448 of the first bottom part 104 to prevent the leakage of liquid from the first bottom part 104.

[0086] In an aspect of the invention, as illustrated in Fig. 4b the outer cap 202 includes a circular body 404 protruded downwards from the lower end of the top surface, wherein the fitted position of the outer cap 202, the circular body 404 presses the insert 304 & second cylindrical part 308 assembly downwards to push the outer periphery of the flexible membrane 432 of the lower attachment part 312, thus closing the flow of liquid from first bottom part to cap.

[0087] Fig. 5 illustrates multiple views of the outer cap 202 that includes a circular side surface 502 and a top surface 504, wherein an inner surface of the circular side surface 502 include threads 406 adapted to fix the outer cap with the outer threads of the first bottom part 104.

[0088] Fig. 6 illustrates multiple views of first cylindrical part 302 in which an outer surface 604 of the first cylindrical part 302 includes a plurality of ribs (602a 602b,...., 602n) to strengthen the first cylindrical part 302 and to provide a better grip to open or fix the cap with the first bottom part 104.

[0089] Fig. 7 illustrates multiple views of third cylindrical part 314 of inner cap 204 having afirst circular flange 426 consisting of two or more holes 702A-N to accommodate the flow of liquid from the first part into the cap. A cylindrical body 436 is protruded upwards from the inner surface of the first circular flange 426, wherein the cylindrical body is perpendicular to the first circular flange 426. A step shaped flange 428 is protruded upwards along an offset distance from the periphery of the first circular flange. A third circular flange 436 is protruded outwards at the lower end of the periphery of the step shaped flange. In an embodiment, outer surface (X) Fig. 7a is fitted with inner surface (Y) in Fig 6b.

[0090] Fig. 8a illustrates a perspective view of an insert having first part 414 and second part 416, wherein the second part is perpendicular to the first part. Further, the second part is divided into two portions, the upper portion 444 is protruded outwards as compared to the lower portion 446, wherein the lower portion is fitted inside the inner surface of the inner cylindrical portion 420 of the second cylindrical part 308 while the lower surface of the upper portion 444 rests on the upper surface of the inner cylindrical portion 420 of the second cylindrical part 308.

[0091] Fig. 8b illustrates a perspective view of the second cylindrical part that includes two cylindrical portions 424 and 420 that are concentric along the same axis, and wherein the inner periphery of the outer cylindrical portion 424 includes two or more flanges 422 A, 422B,...., 422D connecting the inner cylindrical portion 420 with the outer cylindrical portion 424.

[0092] Fig. 9a illustrates a perspective view of upper attachment part 306 that includes a top surface having curved periphery 418 protruded in a downward direction, and a hole provided at a center of the top surface. In the close position, the curved periphery of the top surface of the upper attachment part is in contact with a lower portion of the step shaped flange 408.

[0093] Fig. 9b illustrates a perspective view of lower attachment part 316 having a flexible membrane 432, a lower cylindrical body 434 and a hole at the centre of the flexible membrane 432. In the fitted position of outer cap, the outer periphery is pressed downwards to contact the inner portion of the third circular flange 430 of the third cylindrical part 314 to close the flow of fluid from first bottom part 104 to the inner cap 204.

[0094] Fig. 10 illustrates a spring 310 that is housed over the outer surface of the the second cylindrical portion 420 of the second cylindrical part 308.

[0095] In an aspect of the invention, the insert and second cylindrical part assembly is pressed against the spring 310 to pour the fluid from the inner 204 to the user.

[0096] Fig. 11 illustrates an application of the apparatus in a closed position according to the present disclosure. The apparatus 100 as illustrated in Fig. 10 does not include the outer cap, further as illustrated in Fig. 10 the user is away from the insert of the inner cap. As such in a closed position of the inner cap, the step shaped flange at the inner surface of the first cylindrical part of the inner cap is in contact with the curved periphery of the lower attachment part, thus restricting the flow of liquid outside from the apparatus to the user.

[0097] Fig. 12 illustrates flow of liquid from the apparatus according to the present disclosure. The apparatus 100 as illustrated in Fig. 12 does not include the outer cap, further as illustrated in Fig. 12 when a user puts his lips or finger on the first part of the insert, the insert and second cylindrical part assembly is pressed against the spring, which in turn moves the upper attachment part 418 in a downward direction and create an opening between the upper attachment part 418 and the step shaped flange 408. The dotted lines in Fig. 12 represent flow of liquid. The first part of the attachment portion is adapted to move down by applying a very little force or pressure i.e. even by a little pressure of human lips or fingers.

[0098] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present disclosure contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the disclosure, and other dimensions or geometries are possible. Also, while a feature of the present disclosure may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present disclosure. The present disclosure also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of’ or “consist of’ the recited feature.

Claims

CLAIMS1. An anti-spill apparatus (100) to contain liquid, comprising: a first bottom part (104) configured to hold liquid and having a cylindrical end (320) provided with inner threads (324) and outer threads (322); a dual-cap assembly including an inner cap (204) and an outer cap (202), wherein the inner cap (204) is threadably coupled with the inner threads (324) of the first bottom part (104), and the outer cap (202) is threadably coupled with the outer threads (322) of the first bottom part (104); the inner cap (204) comprising: a movable insert (304) configured to be displaced by an external force applied by a user, a biasing spring (310) arranged within the inner cap (204) to normally maintain a sealed condition, a sealing assembly including at least one seal (316) and at least one attachment member (306, 312) cooperating to prevent leakage of liquid in a closed position, and at least one flow passage configured to establish liquid communication between the first bottom part (104) and an outlet of the inner cap (204) when said insert (304) is displaced against the bias of the spring (310); wherein the inner cap (204) is configured such that a minimal external force applied to said insert (304) compresses said spring (310), thereby displacing the sealing assembly from the closed position to an open position to permit flow of liquid through the flow passage, and wherein release of said external force allows said spring (310) to automatically restore the sealing assembly to the closed position, thereby preventing spillage of liquid.

2. The anti-spill apparatus (100) as claimed in claim 1, wherein the inner cap (204) comprises a first cylindrical part (302) provided with a first flange (408) on an inner surface and a second flange (410) protruded outward to rest on a top edge (440) of the cylindrical end (320) of the first bottom part (104), said second flange (410) forming a support for the biasing spring (310).

3. The anti-spill apparatus (100) as claimed in claim 1, wherein the inner cap (204) further comprises a second cylindrical part (308) having two concentric cylindrical portions (420, 424), an inner periphery of said outer cylindrical portion (424) being provided with a plurality of connecting flanges (422A-422D) linking said inner cylindrical portion (420) and said outer cylindrical portion (424) to maintain structural rigidity while allowing flow passage therebetween.

4. The anti-spill apparatus (100) as claimed in claim 1, wherein the inner cap (204) further comprises a third cylindrical part (314) having a first circular flange (426) with multiple holes (702A-702N) for liquid flow, a step-shaped flange (428) protruded upward from the periphery of the circular flange (426), and a third circular flange (430) extending outwardly at a lower end of said step-shaped flange (428); and wherein said seal (316) is positioned along the outer periphery of said step-shaped flange (428), the outer edge of said seal (316) contacting a curved flange (448) on the first bottom part (104) to prevent leakage of liquid when the apparatus (100) is in the closed position.]5. The anti-spill apparatus (100) as claimed in claim 1, wherein said sealing assembly includes a lower attachment part (312) having a flexible membrane (432) and a hollow cylindrical body (434) protruding downward, said body (434) being fitted over a cylindrical projection (436) of the third cylindrical part (314) to provide dynamic sealing during vertical actuation.

6. The anti-spill apparatus (100) as claimed in claim 1, wherein said sealing assembly further includes an upper attachment part (306) having a top surface with a curved periphery (418) extending downward and a central hole, said curved periphery (418) engaging a step-shaped flange (408) on the inner surface of thefirst cylindrical part (302) to block liquid flow in the closed position; and wherein, upon downward displacement of said insert (304), the upper attachment part (306) moves downward to form an annular opening between said curved periphery (418) and said flange (408), allowing liquid to flow upward through the central hole of said upper attachment part (306).

7. The anti-spill apparatus (100) as claimed in claim 1, wherein the outer cap (202) includes a circular side surface (502) provided with internal threads (406) for engagement with the outer threads (322) of the first bottom part (104), and a top surface (504) having a circular body (404) protruding downward to apply compressive force on the inner cap (204) in the closed condition; wherein the downwardly protruded circular body (404) of the outer cap (202) presses the insert (304) and the second cylindrical part (308) assembly downward, thereby urging said lower attachment part (312) against said third cylindrical part (314) to seal the flow passage; and wherein the top surface (504) of the outer cap (202) includes an internal seal adapted to engage an upper portion of said step-shaped flange (428), thereby providing an airtight closure when the outer cap (202) is fully fitted.

8. The anti-spill apparatus (100) as claimed in claim 1, wherein the first cylindrical part (302) includes a plurality of external ribs (602A-602N) on its outer surface (604) to reinforce the part and provide an enhanced manual grip for attachment or removal; and wherein, in an open position, the first part (414) of said insert (304) rests upon the second cylindrical part (308), and said upper attachment part (306) is snap- fitted to an inwardly protruded portion of the insert (304) to stabilize its open configuration; and wherein the diameter of said outer cylindrical portion (424) of the second cylindrical part (308) is smaller than the outer diameter of said outer cap (202), allowing compact nesting and enhanced aesthetic finish.

9. The anti-spill apparatus (100) as claimed in claim 1, wherein said biasing spring (310) is a helical compression spring concentrically positioned about said inner cylindrical portion (420), configured to bias said insert (304) upward to automatically return the inner cap (204) to the closed position; and wherein said minimal external force applied to the insert (304) is produced by contact of human lips or fingers.

10. The anti-spill apparatus (100) as claimed in claim 1, wherein, in a closed position, the user’s lips remain spaced apart from the inner cap (204), and in an open position, the user’s lips contact the first part (414) of the insert (304) to press the insert (304) downward and establish flow of liquid through the flow passage.

Images