Description:
FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)

1. TITLE OF THE INVENTION
A SEALING ASSEMBLY FOR A VEHICLE DOOR

2. APPLICANTS

NAME : ALP Nishikawa Company Private Limited
NATIONALITY : IN
ADDRESS : Plot No. 32 (HUDA), Sector-18, Gurugram-122015, Haryana, India

2. PREAMBLE TO THE DESCRIPTION

COMPLETE

The following specification particularly describes the invention and the manner in which it is to be performed.

TECHNICAL FIELD

[0001] The present invention, in general, relates to a sealing assembly, and more particularly, to a sealing assembly for a vehicle door to prevent water splash during vehicle door operation.

BACKGROUND
[0002] Sealing assemblies are important parts of automobile industry as they ensure water-tightness and prevent external moisture from entering vehicle’s interior. This prevention is essential to maintain passenger comfort, preserve longevity and functionality of interior components that could get adversely impacted by moisture exposure. Additionally, these sealing assemblies contribute significantly to maintaining structural integrity of vehicle doors and reducing noise.
[0003] Conventional sealing assemblies generally include an extrusion lip, which is made from flexible materials that presses directly against a door frame to create a seal. These assemblies are effective at creating a physical barrier, however, they are not capable of preventing water ingress during rain when the vehicle is in motion at high speeds. As a result, water can enter the passenger compartment and impact passenger comfort by causing dampness or unpleasant odors. This intrusion can also accelerate wear or damage to the interior components.
[0004] Furthermore, the conventional sealing assemblies are not efficient in preventing water splash during door operation such as opening or closing the vehicle door, and can disturb standing water on exterior surfaces causing splashes.
[0005] Additionally, over time and under environmental conditions such as temperature fluctuations, UV exposure and mechanical wear, a sealing lip can deform. This deformation can cause waviness, flattening, or cracks in the sealing profile, which compromises continuity and effectiveness of the seal.
[0006] At present, there exist many alternatives, such as modifying extrusion profiles or joint molds or sealing lips. However, such modifications are not efficient in effectively preventing water ingress and may also degrade the vehicle’s appearance, thereby affecting both the durability and user experience over time.
[0007] In light of the foregoing discussion, there exists a need to address this problem by providing an improved sealing assembly for vehicle doors that ensures effective water management, consistent appearance, and enhanced sealing performance.

SUMMARY

[0008] The present invention provides a sealing assembly for a vehicle door. The assembly includes an extrusion profile. In an embodiment, the extrusion profile is an L-shaped extrusion profile. The sealing assembly further includes a sealing lip extending longitudinally along and projecting outward from the extrusion profile. The sealing assembly further includes a rubber joint mold integrated with the extrusion profile. In an embodiment, the rubber joint mold includes a plurality of molded ribs positioned ahead of an extended portion of the extrusion profile. Thereafter, the sealing assembly includes at least one drain hole positioned in the rubber joint mold configured to direct waterways. In an embodiment, the drain hole and the plurality of molded ribs prevent water splash during vehicle door operation.
[0009] In an embodiment, the L-shaped extrusion profile is formed by removing a segment of a bulb section of the extrusion profile, leaving an extended and reduced section of the extrusion profile.
[0010] In an embodiment, the extrusion profile is a rubber extrusion composed of ethylene propylene diene monomer (EPDM) rubber, and the rubber joint mold is formed from an EPDM sponge molding compound.
[0011] In an embodiment, the plurality of molded ribs includes at least three molded ribs configured to guide water flow toward the drain hole during the vehicle door operation.
[0012] In an embodiment, the drain hole is positioned below the plurality of molded ribs (108) to effectively drain water through joint and door panel.
[0013] In an embodiment, the length of the L-shaped notch is optimized to improve appearance of the sealing lip and eliminate waviness.
[0014] In an embodiment, the rubber joint mold is integrated with the extrusion profile by molding process for robustness & good appearance.
[0015] In an embodiment, the sealing assembly is configured to be applied in both front and rear vehicle door systems to improve visual appearance and prevent water ingress.
[0016] In an embodiment, the extrusion profile, sealing lip, and rubber joint mold are assembled as a unified component to ensure continuous sealing, structural integrity, and improve perceived quality upon door closure.
[0017] A primary objective of the present invention is to provide a sealing assembly for a vehicle door in order to improve sealing performance, drainage efficiency, and aesthetic quality.
[0018] A further objective of the present invention is to use an L-shaped extrusion profile to enable seamless integration with a rubber joint mold.
[0019] Yet another objective of the present invention is to incorporate molded ribs within the rubber joint mold, wherein the molded ribs are strategically positioned to deflect and guide water away from the door assembly during vehicle door operation, thereby reducing water ingress and splash effects.
[0020] Yet another objective of the present invention is to provide at least one drain hole in the rubber joint mold to effectively drain water through a joint and door panel.
[0021] Yet another objective of the present invention is to optimize length of the L-shaped notch in the extrusion profile to prevent waviness or deformation of a sealing lip, thereby enhancing visual appearance.
[0022] Yet another objective of the present invention is to ensure material compatibility and provide a long-lasting seal by utilizing an EPDM rubber for the extrusion profile and an EPDM sponge molding compound for the rubber joint mold.
[0023] Yet another objective of the present invention is to provide the sealing assembly suitable for both front and rear doors of the vehicle.
[0024] The foregoing summary is provided for illustrative purposes only and is not intended to limit the scope of the invention in any way. In addition to the illustrative aspects, embodiments, and features described earlier, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of this disclosure, illustrate exemplary embodiments, and together with the description, serve to explain the disclosed principles. The same numbers are used throughout the figures to reference like features and components, wherein:
[0026] FIG. 1 illustrates a pictorial representation of a sealing assembly for a vehicle door, in accordance with one or more exemplary embodiments of the present disclosure;
[0027] FIG. 2a illustrates a pictorial representation of an extrusion profile (A) before notching and (B) after notching for integration with a rubber joint mold, in accordance with one or more exemplary embodiments of the present disclosure;
[0028] FIG. 2b illustrates a pictorial representation of an integration of an L-shaped extrusion profile with the rubber joint mold, in accordance with one or more exemplary embodiments of the present disclosure;
[0029] FIG. 3 illustrates a pictorial representation of the sealing assembly having a plurality of molded ribs positioned within the rubber joint mold, in accordance with one or more exemplary embodiments of the present disclosure; and
[0030] FIG. 4 illustrates a detailed pictorial representation of the sealing assembly for the vehicle door, in accordance with one or more exemplary embodiments of the present disclosure.
[0031] The foregoing shall be more apparent from the following more detailed description of the disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

[0032] To be better understood by those skilled in the art, the present invention is described in the following description with reference to the attached drawings.
[0033] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. It will be apparent, however, to one skilled in the art that these specific details are only exemplary and not intended to be limiting.
[0034] It is to be understood that various omissions and substitutions of equivalents may be made as circumstances may suggest or render expedient to cover various applications or implementations without departing from the scope of the present disclosure.
[0035] Further, it is to be understood that the phraseology and terminology employed herein are for the purpose of clarity of the description and should not be regarded as limiting.
[0036] Furthermore, in the present description, references to “one embodiment” or “an embodiment” mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. The appearance of the phrase “in one embodiment” in various places in the specification does not necessarily refer to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
[0037] Further, the terms “a” and “an” used herein do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced items. Moreover, various features are described which may be exhibited by some embodiments and not by others. Similarly, various requirements are described, which may be requirements for some embodiments but not for other embodiments.
[0038] In the automotive industry, “sealing” refers to the method or process of using a seal, a specialized material, to close gaps, joints, or interfaces between two surfaces to prevent entry or exit of unwanted elements such as water, dust, air, noise, or heat. This is essential for maintaining integrity, comfort, and performance of a vehicle. The seal is generally made of flexible, durable materials such as specially formulated rubber or elastomeric materials. These materials are chosen for their ability to provide durable elasticity, excellent adhesion, resistance to environmental degradation such as UV exposure, ozone, temperature extremes, and chemical exposure, and effective barrier properties against water, dust, and noise infiltration. By bonding and protecting adjoining components such as door panels, window frames, and structural members these seals contribute significantly to the vehicle’s overall robustness and occupant comfort.
[0039] A sealing assembly refers to an arrangement of sealing elements that function together to provide effective protection and insulation for specific sections of a vehicle. The assembly generally includes rubber extrusion profiles, molded joint components, sealing lips and other related features, all of which must conform to the increasingly complex geometries of the vehicle doors, particularly at joints, corners, and transitional areas. The sealing assembly is designed not only for functional performance, such as, but not limited to, keeping water and dust out and reducing wind or road noise, but also to meet aesthetic and aerodynamic goals, contributing to the overall quality perception of the vehicle.
[0040] The sealing assemblies are generally applied around critical openings of the vehicle, including edges of vehicle doors, windows, trunks, and similar openings, to prevent ingress of water, dust, and noise.
[0041] Referring to FIG. 1, a pictorial representation of the sealing assembly for the vehicle door is disclosed.
[0042] As depicted, the sealing assembly (100) includes a plurality of components to provide effective sealing and durability. The sealing assembly (100) includes an extrusion profile (102). The extrusion profile (102) forms a foundational structure of the seal assembly and is configured to fit precisely along the vehicle door frame, conforming to its contours for optimal contact. In an embodiment, the extrusion profile (102) is an L-shaped extrusion profile (102). It is important to note that the extrusion profile and the L-shaped extrusion profile both are represented by the same reference numeral (102), as they refer to the same structural element within the sealing assembly. The formation of L-shaped extrusion profile (102) is explained in detail in FIG. 2.
[0043] The sealing assembly (100) further includes a sealing lip (104). The sealing lip (104) is configured to be extended longitudinally along and projected outward from the extrusion profile (102). In an embodiment, the sealing lip (104) serves as a flexible, compressible barrier that presses firmly against surface of the door or vehicle body to establish a continuous, resilient seal that prevents the ingress of water, dust, and noise.
[0044] The sealing assembly (100) further includes a rubber joint mold (106). In an embodiment, the rubber joint mold (106) is configured to be integrated with the extrusion profile (102), which enhances sealing performance, especially at joints and transition areas prone to leakage. The rubber joint mold (106) incorporates a plurality of molded ribs (108) strategically positioned ahead of an extended portion of the extrusion profile (102). These ribs (108) redirect water flow and reduce the impact force of splashing water during the opening and closing of the door.
[0045] Furthermore, the sealing assembly (100) includes at least one drain hole (110) located in the rubber joint mold (106). This drain hole is specifically designed to channel and direct water away from critical sealing points, preventing water buildup and facilitating efficient drainage. In an exemplary embodiment, the drain hole is positioned below the plurality of molded ribs (108) to effectively drain water through joint and door panel. Together, the arrangement of the molded ribs (108) and the drain hole (110) work synergistically to minimize water splash and infiltration during dynamic vehicle use, thereby enhancing passenger comfort, protecting interior components, and maintaining the long-term integrity and aesthetic quality of the vehicle door sealing system.
[0046] Referring to FIG. 2a, a pictorial representation of an extrusion profile (A) before notching and (B) after notching for integration with the rubber joint mold (108) is disclosed, in accordance with one or more exemplary embodiments of the present disclosure.
[0047] As depicted in (A) of FIG. 2a, the extrusion profile (102) features a prominent bulb section that constitutes part of the primary sealing surface and structural bulk of the profile. As part of the preparation for integration, a defined segment of the bulb section is removed from the extrusion profile (102) through a notching process. This precise removal results in the configuration having an extended and reduced section of the original extrusion profile (102), as depicted in (B). The resulting L-shaped extrusion profile facilitates a seamless, interlocking fit with the corresponding rubber joint mold (106). This L-shaped extrusion profile optimizes the alignment, mechanical engagement, and bonding with the rubber joint mold (106), thereby ensuring continuity in the sealing surface while minimizing the risk of displacement, gaps, or water ingress at the profile-mold interface. This approach not only supports robust water management and sealing integrity but also accommodates complex door geometries and transition zones, enhancing the durability and overall effectiveness of the vehicle door sealing assembly. Further, the length of the L-shaped extrusion profile is optimized to improve appearance of the sealing lip (104) and eliminate waviness.
[0048] Referring to FIG. 2b, a pictorial representation of an integration of the L-shaped extrusion profile (102) with the rubber joint mold (106) is disclosed, in accordance with one or more exemplary embodiments of the present disclosure. In an embodiment, the rubber joint mold (106) is integrated with the extrusion profile (102) by molding process for robustness & good appearance. This method of integration ensures both mechanical robustness and a visually appealing, continuous appearance at the profile-mold interface.
[0049] In an embodiment, the extrusion profile may be a rubber extrusion composed of ethylene propylene diene monomer (EPDM) rubber, and the rubber joint mold (106) may be formed from an EPDM sponge molding compound. The integration of these two components using compatible EPDM materials not only promotes material compatibility and long-term sealing performance, but also delivers a reliable, resilient, and aesthetically refined sealing assembly suitable for advanced vehicle door applications.
[0050] In another embodiment, materials other than EPDM may be employed for either the extrusion profile or the rubber joint mold. For instance, various thermoplastic elastomers (TPEs) or alternative rubber compounds with suitable mechanical properties, environmental resistance, and processing compatibility may be selected based on specific application requirements. The choice of these alternative materials allows for flexibility in manufacturing and can be tailored to optimize characteristics such as hardness, compression set, chemical resistance, or cost-efficiency while maintaining effective sealing, water management, and durability in the vehicle door assembly.
[0051] Referring to FIG. 3, a pictorial representation of the sealing assembly having a plurality of molded ribs positioned within the rubber joint mold is disclosed. As depicted, the sealing assembly (100) includes the extrusion profile (102) and the rubber joint mold (106) having the plurality of molded ribs (108). A magnified inset zooms in on a region of the assembly having the molded ribs (108) and the drain hole (110) for clarity.
[0052] Within the zoomed-in section, three molded ribs (108) are visible, positioned at regular intervals inside the rubber joint mold (106). These molded ribs (108) are an integral part of the design, engineered to reinforce the structural integrity of the sealing assembly (100) while serving important functional roles in managing water and airflow.
[0053] The arrangement of the ribs assists in redirecting and breaking up water flow, thereby mitigating the risk of water splash or ingress during dynamic operations such as opening and closing the door.
[0054] Additionally, the drain hole (110) is shown within the rubber joint mold (106) below the plurality of molded ribs (108) to effectively drain water through joint and door panel. This drainage feature is strategically positioned to facilitate the efficient removal of any water that may accumulate within the sealing assembly (100), guiding it safely away from critical sealing surfaces and preventing moisture buildup that can lead to leaks or corrosion.
[0055] Referring to FIG. 4, a detailed pictorial representation of the sealing assembly for the vehicle door is disclosed, in accordance with one or more exemplary embodiments of the present disclosure. FIG. 4 specifically demonstrates the direction of water flow (indicated by the arrow) through integrated features of the sealing assembly (100), which includes the extrusion profile (102), the sealing lip (104), the rubber joint mold (106), the plurality of molded ribs (108), and the drain hole (110). The extrusion profile (102) is integrated with the rubber joint mold (106). Within the rubber joint mold (106), a set of molded ribs (108) are provided and positioned longitudinally in the upper portion of the joint mold. These ribs (108) are engineered to disrupt, redirect, and guide water flow away from the vulnerable sealing edge, particularly during conditions such as rain, car wash, or dynamic door movement.
[0056] Further, the drain hole (110) is strategically located below the molded ribs (108). The drain hole (110) serves a critical function by channeling the water downward (as depicted by the arrow), effectively preventing water accumulation or splash-back within the sealing assembly (100). The molded ribs (108) assist in guiding water toward this drain hole (110), ensuring efficient drainage from the sealing interface to the exterior of the vehicle.
[0057] It has thus been seen that the sealing assembly for the vehicle door, according to the present invention, achieves the purposes highlighted earlier. Such a sealing assembly can in any case undergo numerous modifications and variants, all of which are covered by the same innovative concept, moreover, all of the details may be replaced by elements that are technically equivalent. The scope of protection of the invention is therefore defined by the attached claims.

Dated 1st day of September, 2025
Ankush Mahajan
Agent for the Applicant (IN/PA-1523)
OF Global Institute of Intellectual Property Pvt. Ltd. , Claims:Claims
We Claim:
1. A sealing assembly (100) for a vehicle door, comprising:
an extrusion profile (102), wherein the extrusion profile (102) is an L-shaped extrusion profile;
a sealing lip (104) extending longitudinally along and projecting outward from the extrusion profile (102);
a rubber joint mold (106) integrated with the extrusion profile (102), the rubber joint mold (102) comprises a plurality of molded ribs (108) positioned ahead of an extended portion of the extrusion profile (102); and
at least one drain hole (110) positioned in the rubber joint mold (106) configured to direct waterways, wherein the drain hole (110) and the plurality of molded ribs (108) prevent water splash during vehicle door operation.

2. The sealing assembly (100) as claimed in claim 1, wherein the L-shaped extrusion profile is formed by removing a segment of a bulb section of the extrusion profile (102), leaving an extended and reduced section of the extrusion profile (102).

3. The sealing assembly (100) as claimed in claim 1, wherein the extrusion profile (102) is a rubber extrusion composed of ethylene propylene diene monomer (EPDM) rubber, and the rubber joint mold (106) is formed from an EPDM sponge molding compound.

4. The sealing assembly (100) as claimed in claim 1, wherein the plurality of molded ribs (108) includes at least three molded ribs configured to prevent splashing water on passenger while opening door and guide water flow towards the drain hole (110) during the vehicle door operation.

5. The sealing assembly (100) as claimed in claim 1, wherein the drain hole (110) is positioned below the plurality of molded ribs (108) to effectively drain water through a joint and door panel.

6. The sealing assembly (100) as claimed in claim 1, wherein the length of the L-shaped extrusion profile is optimized to improve appearance of the sealing lip (104) and eliminate waviness.

7. The sealing assembly (100) as claimed in claim 1, wherein the rubber joint mold (106) is integrated with the extrusion profile (102) by molding process for robustness & good appearance.

8. The sealing assembly (100) as claimed in claim 1, wherein the sealing assembly (100) is configured to be applied in both front and rear vehicle door systems to improve visual appearance and prevent water ingress.

9. The sealing assembly (100) as claimed in claim 1, wherein the extrusion profile (102), the sealing lip (104), and the rubber joint mold (106) are assembled as a unified component to ensure continuous sealing, structural integrity, and improve perceived quality upon door closure.

Dated 1st day of September, 2025
Ankush Mahajan
Agent for the Applicant (IN/PA-1523)
OF Global Institute of Intellectual Property Pvt. Ltd.