The present invention relates to cargo protection devices useful for railway cars carrying cargo, and more particularly to protectors in the form of bumpers or guards for autorack railway vehicles that are used to transport automobiles, methods for their production, and railway autorack cars.
Railway cars are often used to carry cargo. There are specially designed railway cars that are used to transport automobiles, such as, for example, cars, trucks, vans, SUV's. The autorack railway cars typically have vertical sidewalls and may have multiple levels, such as two or three stacked levels that can contain vehicles, the levels depending on the rail clearances and the heights of the vehicles being transported. A number of vehicles may be transported in one railway car, from as few as two, to ten or more, and there are guidelines for loading vehicles. In some instances, the railroads purchase the rack structures, and the rack structures are installed on a flatcar of the railroad converting the flat car to an autorack car. In other instances, the autorack railway car may be a self-contained car having a structure of levels. In most cases, the autorack cars will typically have exposed support posts that are vertically disposed at intervals along each lateral side of the car. The autorack railway cars generally have screens on each side thereof which are the sidewalls. The screens have a plurality of holes provided therein for air and light, and are designed to protect against objects and debris that could otherwise damage the automobiles in transit.
The posts or struts that support the walls of an autorack railway car present a potential danger to the automobiles therein. Often, automobiles are loaded onto an autorack by a human driver who drives them onto the platform or level within the railway car (typically on a ramp leading to the autorack cargo entrance). In order to do this, the driver must open the door to exit the vehicle. This can present a problem should the door swing too far and contact the autorack sidewall or more likely the side post. Even where a driver is careful and does not open the door into a sidewall or post, in other situations, the automobile vehicle door may become dislodged and open during transport. In any situation where a door contacts the post or other structure of the autorack, there is usually damage, and repair costs can be substantial as the vehicles typically are new vehicles. While the new automobiles being transported usually have a protective wrap covering their exterior surfaces, the wrap does not protect the vehicle from engagement with the autorack interior structures.
A number of attempts to protect the automobile cargo traveling in an autorack railway car have been made. Some prior devices may be time-consuming to install and can be expensive to mount. Since typically a large number of autorack railway cars are configured at once, any delays in configuring them has the potential to hold-up loading operations, or require advanced efforts to install the protections. Some prior art devices may provide some protections, but still fail to protect some areas of the autorack railway car, leaving some structure exposed (such as a post or sidewall) and likely to cause damage to an automobile should an automobile door inadvertently contact the autorack structure sidewall or support. In addition, the existing door edge protection systems typically are placed in what are considered to be optimal locations to protect against as many different car door profiles as possible. While this type of general placement attempts to accommodate a number of door profiles, the prior art devices have been known to prove inadequate for some vehicles where an outermost contact point of the vehicle door is at an unprotected location and beyond the protections offered by the current devices.
Some examples of prior art devices and attempts to provide protections include US Patent application US 2002/067970 A1, which discloses a “Door Edge Protection System for Conventional Autorack Railcars”; U.S. Pat. No. 5,311,823 which discloses a “Bumper Seal For Auto Rack Car”; U.S. Pat. No. 5,762,001 which discloses a “Door Edge Protector”; and U.S. Pat. No. 5,527,139 which discloses a “Vehicle Door Protection System.
A need exists for devices and methods that can provide protection for automobiles being carried in an autorack railway car and which may be readily attached to and removed from an autorack railway car, and can be adjusted or positioned over the railway car structures.
Protectors and protector systems that are removably installable on a railway vehicle are provided. The protectors and protector systems are designed for use in a railway vehicle, and more particularly, in an autorack railway vehicle or rail car that has been configured with one or more levels and sidewalls to form an interior designed to receive and transport automobiles. The inventive protectors and protector system include mounts, and mounting hardware may be used to secure the protector in place. According to some embodiments, the mount may be provided as part of the protector. For example, according to some embodiments, the protector mount may comprise a fastener that is integrally provided as part of the protector, and allows the protector to be fastened to a structure of the railway car or autorack interior without the need for further fastening hardware or specialized tools. According to some alternate embodiments, the protectors may be secured to the autorack interior structures using separate fasteners (including commercially available fasteners). The separate commercial fasteners may be used alternatively or in addition to the integral fasteners of the protector. According to some embodiments, installation may be carried out with separate fasteners that attach the protector or portions of the protector to the sidewall or other structure of the autorack, fasteners that are pre-attached or integrally provided as part of the protector, or combinations of fastener types.
Preferred embodiments of the present protectors and protector systems allow removal and/or repositioning of the protector and components to provide protection at a suitable or desired location, allowing tailoring of the system and protectors to desired locations or relative heights.
Embodiments of the protectors are constructed from a material that if contacted by an automobile will not abrade or damage the door, paint finish, or other structure of the automobile. Preferred embodiments are constructed from a plastic material, and may be molded or extruded. Other suitable non-abrading materials may be used to construct the protector. Protectors also are suitably rigid, but yet have some resilience, so that the underlying structure of the autorack that the protector covers, such as, for example, a post or screen wall, will not be able to damage the vehicle, or, any potential damage will be minimized.
Preferred embodiments may be constructed to meet the requirements for door edge protection systems set forth in AAR specification M-991, or exceed these requirements where minimum thresholds are provided. For example, embodiments of the protectors and protector systems, including the fastening components or features, preferably are constructed from materials that if inadvertently contacted will not damage the painted door surface of an automobile, nor transfer any color or material to the vehicle door. In addition, the protectors and systems preferably have longevity and can last for a duration of at least 10 years while remaining full functionality to provide protection. The protectors and systems also are removable, and preferred embodiments provide replaceability for conservation and reuse of materials. Embodiments may be constructed from recycled materials and may themselves be recyclable, and which preferably pose no environmental hazards, nor any harm to the health or safety of personnel installing or operating near the devices. As a further safety aspect, the protectors and systems preferably are configured without sharp edges, in order to minimize the potential to catch on clothing of personnel and/or injure personnel passing or working nearby. The present systems also allow easy repairs or replacement should that be necessary, which can be done on site, or at shop or pool loading locations. According to some embodiments, fewer components may be used to construct a variety of protectors suitable for different spans of coverage. The protectors and systems also are designed and constructed to have sufficient strength to withstand expected contact with vehicle doors and/or personnel without becoming damaged or misaligned. The protectors and systems preferably are sufficiently strong so that they can have a minimal thickness that provides protection to the vehicles, while at the same time, minimizes potential intrusion into the cargo space of the rail car where the vehicle is loaded.
The protector preferably includes one or more protective surfaces or structures which provide a barrier of protection to protect the cargo, such as a vehicle door part, from contact with the post or other item of the railway car interior structure. Some preferred embodiments of the protector may include arcuate or radiused surfaces or structures, which, when the protector is installed, will protrude away from the autorack structure providing a contacting surface that sits in front of or above the autorack structure (e.g., post or sidewall). The inventive protectors allow some resilience or rebound when the protector is engaged by a vehicle part, such as an automobile door. For example, the resilience slows down the door by absorbing some or all of the force and transferring that force to the movement of the protector surfaces to compress. According to some preferred embodiments, the protector may include at least one, and preferably a plurality of outwardly positioned segments, such as longitudinal beads that may span the protector length. In the preferred embodiments, the longitudinal beads may be separated by a wall segment or joined by another connecting portion. Preferred embodiments are illustrated with longitudinal beads being adjacently disposed, but they could be provided in one or more other directions and/or arrangements.
According to some embodiments, the protective devices are provided so that they may be configured to meet the needs for the particular autorack railway vehicle, and/or satisfy the demand for the railroad, the customer, installer, or other person or entity that needs to procure and install the protective devices. For example, according to some embodiments, the protectors comprise a configurable section or portion that may comprise, or be supplied in, different lengths. According to these embodiments, a protector section, when assembled together with one or more other protector sections, forms a protector spanning a length. The protectors are designed to accommodate the structure on or over which the protector is being applied in order to provide suitable coverage at the height installed (e.g., over the surface of a post or other structure, to cover the post width at a desired post height). The protectors may constructed to be offset to account for posts and other mounting structures so that the protector covers the face of a structure as well as sides of dimensional structures, such as posts.
According to some embodiments, a protector may include one or more segments that are attachable to one or more other portions of the protector to provide additional width and coverage of protection. The one or more sections may be attached during production of the devices, or alternatively, they can be supplied and, in some arrangements, the protectors can be configured at or prior to use or installation. The assembly of a protector may be done prior to or after shipment, and preferably are configurable and reconfigurable to address the installation needs. According to some preferred embodiments, assembly of the protectors may be done manually and without the need for tools, and do not require the use of adhesives, welds or other time-consuming construction processes.
For embodiments where the protector devices are produced from a plurality of sections, the segments or sections may be attachable using a suitable fastening means. The fastening means may for example comprise separate fasteners such as push-in type fasteners, or, alternatively, may comprise an integral attachment feature where the section or segments attach using an integral locking mechanism. According to preferred embodiments, the fastener or integral locking mechanism is releasable and may be released to detach or remove the extension segment. The integral fastener provides improvements over the prior fasteners, since, unlike separate fasters, the integral fasteners will not be dropped or lost, and facilitate installation. The additional benefit reduces environmental resources, since in addition to convenience, according to some embodiments, the separate production fasteners may be reduced or even eliminated. The cost savings, both economic and environmental, may be realized by reduced resources consumption.
According to some embodiments, where the protector is configured to be constructed from a plurality of sections or segments, one or more of the sections may be provided having a track or guide that facilitates aligning the sections together for receiving the fastener that secures the sections, or for the integral lock to engage. The guide may comprise a track, slot, or other suitable alignment element. For example, sections that are configured to be connected together may include a guide that facilitates alignment of the sections, and preferably places the connectors, such as locking tabs, apertures, or other connectors, in alignment with one another so that the sections may be readily attached. According to some preferred embodiments, a method for producing the protector includes aligning the sections together, and securing the sections. According to some embodiments, the method also includes selecting a section having a particular length that will produce a protector having a desired length.
The protectors are configured to mount on the autorack interior, such as on the sidewall, post, roof rail or other interior structure. Embodiments of the protectors may include tabs for securing the protector to the sidewall of an autorack or other mounting structure of the railway car. For example, the tabs may be provided at each end and may be configured so they are offset from the central area or protective body of the protector. The tabs preferably are provided to mount the device to the autorack screen sidewall. In an installation, for example, the offset body may be distant from the sidewall and positioned over a post that is located in front of the sidewall (i.e., where the post protrudes into the autorack interior). The protective portions of the protector may cover portions of the front of a post as well as the sides.
Methods for producing and installing a protector and protector system on a railway vehicle, such as, for example, an autorack railway vehicle, are also provided. The methods include installation of the protector by inserting a portion of the protector configured to mount to an autorack structure into an aperture of the autorack structure (e.g., such as a side-wall or screen panel which typically have openings therein). The methods also may comprise assembling the protector to a desired length by selecting and attaching a section, and also may include constructing the protectors by actuating a self-locking component to join protector sections together. According to some embodiments, this may be accomplished by sliding and/or snapping together sections.
According to preferred embodiments, the system, devices and methods are configured to facilitate assembly of the protective devices, during production or installation, or both. The devices are configured to allow connections of the strap or device ends to an intermediate portion or portions. The connections between the device sections or portions, such as the end portions and the intermediate portion (or portions) preferably are removable connections. The connection that connects the one or more intermediate portions is releasable. According to some preferred embodiments, the connected together portions may be removable and re-attachable.
Embodiments of the devices that employ a releasable connection allow for one of the connectable parts of the assembly to be replaced without the need for the entire device to be replaced (for example, where damage has occurred to one of the components, such as when the components have been assembled together).
According to some preferred embodiments, the devices may be secured together without the need for welds, adhesive or other bonding agents and methods. The devices may be permitted to remain in the secured together condition, and released, or the secured together condition may be made permanent if desired.
For example, for manufacturing or installation, the devices may be connected together, and, according to some alternate embodiments, they may connect together using the methods and features disclosed herein, and may optionally be affixed to make a permanent connection.
Embodiments of the invention also provide an autorack railway car configured with protectors arranged to protect the automobiles transported therein from damage due to inadvertent contact with an interior structure of the autorack car (such as a post or sidewall). The protector provides a barrier between the post or sidewall and the automobile door, so that in the event a door is swung open too widely, it will contact the protector and damage will be prevented or minimized.
These and other advantages are provided by the invention. Features that are described and shown in connection with an embodiment may be used in conjunction with another embodiment.
Protective devices comprising of guards for use in an autorack railway vehicle to provide protection for the cargo, typically, automobiles such as cars, trucks and vans loaded into and carried therein are shown and described herein according to preferred embodiment illustrating the invention. Methods for producing the devices and for installing the devices also are provided.
Referring to
The protector 110 may be expanded by joining an additional section or sections, also referred to herein as a portion or portions. This may be done by providing the protector 110 as a single piece and separating it, or providing a plurality of pieces, and assembling them together. Exemplary embodiments of the protectors and system are shown and described herein.
In the exemplary embodiment shown in
The protector sections 112, 113 may be formed as separate sections, while according to some alternate embodiments the protector sections, they may be formed together, and then separated.
The protector 111 is shown in an exemplary embodiment having a bisecting line or groove 130. According to preferred embodiments, the groove 130 is provided on the underside of the protector 111 and spans transversely across the underside of the protector 111. According to a preferred embodiment, the transverse groove 130 is shown commencing at an edge 130a of the protector 110. The line or groove 130 may be visibly provided (on the top or underside surface), or 130 may represent the center section with no line or groove, depicting a location where, if separated, would form two sections (e.g., first and second sections 112, 113). According to preferred embodiments, the groove 130 is provided on the underside to facilitate cutting of the protector 111 (such as when desired to connect with an intermediate portion, for example, intermediate portion 131 shown in
The embodiment of the protector 110 illustrated in
Referring to
Each connector 134, 135 is configured to connect with the first portion 112 and second portion 113, respectively. As illustrated in accordance with an exemplary embodiment, the body portions 112, 113 have self-locking connectors 137, 138 that are matingly configured to connect with the respective connectors, which comprise the apertures 134, 135 provided on the intermediate portion 131. The intermediate portion 131 is depicted as a single portion, but according to some other embodiments, although not shown, may be configured from a plurality of portions that connect together to provide different lengths for the protector 110. The intermediate portion 131 is shown separately in
According to an exemplary embodiment illustrated, the respective connectors 137, 138 provided on the first and second portions 112, 113, are shown comprising respective legs 140, 141, which are disposed in a respective opening 142, 143, and preferably are flexibly provided. The intermediate portion 131 has matingly associated connectors 134, 135 that connect with the legs 140, 141, respectively, to secure the intermediate portion 131 to the first and second sections 112, 113. The connectors 134, 135 of the intermediate portion 131 are illustrated according to a preferred embodiment comprising apertures or recesses that are matingly configured to receive respective bosses 150, 151 provided on each of the respective legs 140, 141 of the first and second sections 112, 113. Preferably, each leg 140, 141 has an attachment point 154, 155 and a free end, 156, 157. The legs 140, 141 are designed to flex so that the respective bosses 150, 151 are received in the respective apertures 134, 135 of the intermediate portion 131.
Flanges 160, 161 are provided on the first portion 112, and flanges 162, 163 are provided on the second portion 113. The respective flange pairs 160, 161 and 162, 163 are configured as guides that comprise channels or slots 164, 165 and 166, 167 to guide the edges 131a, 131b of the intermediate portion 131 into position within a first section 112 and/or second section 113 to facilitate engagement of the locking feature. Preferably, the sections may be slidably connectable, by aligning the edges of one protector portion with guide slots or channels, and sliding the protectors to engage the connector. For example, according to one embodiment, the intermediate portion 131 may slidably connect with the first portion 112, by aligning and sliding the intermediate portion edges 131a, 131b within the channels or slots 164, 165 of the first portion 112, and sliding one or both portions together to engage the connectors, such as the first portion locking leg 140 and intermediate portion connector, such as the aperture 134 (see
Referring to
Similar to the protector 110, the protector 210 includes mounting tabs 216, 217. Each mounting tab 216, 217 is shown including respective apertures 220, 221, and 222, 223, for facilitating mounting of the protector 210 onto the autorack by passing a fastener (such as the fastener 250) through the apertures 216, 217. The intermediate portion 214 may be supplied in different lengths to provide variations for the protector 210, so the protector 210 may be assembled, reconfigured, or produced to have the desired length.
The design of the protectors 110, 210, 310 permits standardized end pieces, such as the first portion 112, 212, 312 and second portion 113, 213, 313 to be provided as the end sections and have different protector overall length based on the length of an installed intermediate portion 131, 214, 314. The production of the protectors 110, 210, 310 preferably is facilitated by the design configuration where the end pieces are assembled together with the intermediate portion.
According to some embodiments, the protectors shown and described herein are self-mounting, and include mounting elements provided as part of the protector. In an exemplary embodiment, snap-legs are provided on each tab for facilitating press-fit or snap-fit installation to a panel wall of the autorack, such as, for example, by inserting the mounting elements into the apertures in the autorack screen sidewall. An exemplary embodiment showing the self-mounting feature is depicted in
According to some preferred embodiments, protective devices according to the invention may be configured with a self-mounting fastener (such as the fasteners 321, 322), or alternatively, or additionally, may include both one or more self-mounting fasteners and another fastening or mounting feature, such as an aperture designed to receive a fastener (see e.g., fastener 250 shown in
An alternate configuration of a protector 310 is shown to secure the intermediate portion 314 to the respective first and second portions 312, 313. The first and second portions 312, 313 are shown in a separated configuration in
According to some embodiments, an optional feature may include fenestrations that provide access to the legs in order to release the legs from their engaging positions, in the event that sections of the protector 310 are desired or needed to be disassembled from each other (or reconfigured). Embodiments provide access openings near the fastening post that may be used to facilitate removal of the device or device portion. For example, a device portion may be disassembled by pinching the fasteners together to disable and/or release the snap fit.
Embodiments of the invention also include a railcar configured with one or more levels to receive automobiles therein, and transport automobiles via the rails. The railcar is fitted with the protectors shown and described herein, such as the protectors 110, 210, 310, 610. The railcars that transport automobiles are often referred to as autorack railway cars, or just simply autoracks, and typically are flat cars that have sidewalls and roof covers installed on them to protect the cargo in the interior space. The railcar also has one or more wheelsets, one or more decks for the automobiles (e.g., single level, bi-level, or tri-level). Automobiles are loaded into the autorack railway car (typically they are driven in) and the autorack transports the automobiles on the railway to a destination. The sidewalls of the autorack car are formed from a panel, such as a screen having apertures therein to which the protectors 110, 210, 310, 610 may be mounted. The autorack car includes a plurality of supporting posts that provide structure to the railway car, and which also support the sidewalls. The railcar interior structure is formed by a plurality of upstanding posts extending from the railcar frame. The railcar has sidewalls and a roof that protect the contents by blocking out debris and some weather elements. The upstanding posts are located on opposite lateral sides of the railcar and the sidewalls are also located on opposite lateral sides. An interior space for receiving the vehicles, and where the one or more decks are located, is provided between the lateral sides of the railway car, with the posts being disposed on each lateral side of the interior space, and sidewalls also being disposed on each lateral side of the interior space. The roof preferably covers the interior space. The protective guards of the invention discussed herein, are installed on the railcar interior to provide protection for automobiles to be transported. The protective guards are mounted to cover portions of the posts, sidewalls and/or other interior structures (rails or beams), and preferably are installed at pre-determined heights and positions to provide a barrier to unexpected contact with an automobile (e.g., such as a door swinging open). According to preferred embodiments, the protectors are mounted by attaching them to the sidewalls.
An exemplary embodiment of a railcar 500, configured as an autorack car is depicted in
The protective devices 110, 210, 310 may be installed by securing the respective mounting tabs 116, 117; 216, 217; 316, 317 to the sidewall apertures 511. As shown in
The protectors provide a barrier between the automobile and the interior rail car structures. The protectors may be installed to cover a post, and provide a protective surface or structure between the post and an automobile in order to limit damage caused by an automobile door that may swing out and instead contact the protector. According to preferred embodiments, the autorack is configured with a plurality of protectors which are disposed at heights suitable to protect the automobiles from direct contact with a post by providing a protective barrier between the automobile door and the post. According to preferred embodiments, the protector has a resilient surface that is designed to absorb shock and forces to prevent damage to the paint finish and/or structure of an automobile, such as the automobile door that is swung open toward a sidewall or post. The autorack may include protectors that have different lengths (which, for example, may be mounted horizontally or diagonally across a post), so that the width of the post at the height above the floor or floor level at which protection is required can be accommodated. The protectors are configured with an intermediate portion to provide a suitable length to cover the post width. The system and methods of assembly and installation provide suitable protection at the desired locations in the autorack interior. The protectors are assembled and/or installed with an intermediate portion length that is suitable to cover the post width, and allow mounting of the protector (such as with the tabs at each protector end). According to some implementations and embodiments, protector sections may be produced separately. According to some other implementations, the protectors may be produced by having one or more protector sections formed together, and then separating the formed together protector sections into two or more sections. For example, as shown in connection with embodiments depicted herein, the first and second protector portions may be formed or otherwise produced together, and then separated if desired or as needed. This allows the protector to be used with the first and second portions forming each side or half of the protector. It also allows for the protector to be separated, through cutting or other separation technique into separate protector portions, so that one or more additional sections, such as an intermediate protector section may be connected with the first and second sections. The methods include separating the protector into sections, such as a first section and second section, and connecting the first and second sections to an intermediate portion to provide a desired length for the resultant protector. The intermediate portion and first and second protector portions include a connection for connecting the protector sections, which may be integral connectors, or separate connectors, such as fasteners. The protectors may be provided already assembled with the intermediate portion, or may be provided in a kit form to be assembled, or may be provided in the form where separation is optional, in the event desired or needed. The intermediate portions may be provided in different lengths as desirable to provide suitable protection for the span of the post or post frames being covered. In addition, although the beads are shown spanning the longer dimension of the protector, and intermediate portion, the beads may be provided in a different orientation, such as vertically oriented or in some other orientation. According to some embodiments, the intermediate portion may be provided as a plurality of intermediate portions, where two or more intermediate portions connect to each other, and/or to a first portion and/or a second portion, and may also connect utilizing the connectors shown and described herein. In addition, although the first portion and second portion are shown according to some embodiments formed by a single piece, and separated to form the first protector and second protector (such as the first portion 112 and second portion 113), according to some alternate embodiments and implementations, the protector portions may be formed independent of each other, as separate pieces. The protectors referred to herein may comprise a single portion or section, or may be comprised of a plurality of sections or portions in assembled together or unassembled conditions.
According to some alternate embodiments, protectors of the invention may comprise a body with mounting tabs disposed at each end thereof. The body may take any of the configurations shown and described herein, or may have alternate configurations that provide a protective surface structure that covers an autorack sidewall or support structure such as a post, that may readily self-mount using any of the self-mounting locking features shown and described herein. According to some embodiments, the mounting tabs preferably may be configured to include an integral fastening feature, such as, for example, the snap-legs shown and described herein. The protector may comprise a single structure with mounting tabs at each end, or alternatively, the protector may comprise a plurality of sections, such as two end portions connecting with an intermediate portion. According to some alternate embodiments, the connection between the end portions and the intermediate portion may be made using adhesive, welds, pins that are inserted into receiving apertures and are heat welded, or other suitable connecting mechanism. In these alternate embodiments, the mounting tabs include self-mounting fasteners, and preferably, the snap-legs shown and described herein in connection with the protectors shown in
The protectors shown and described preferably are constructed from a suitable material which may be a polymer having resistance to heat, cold and extreme weather conditions, as well as corrosion and UV radiation. The protector integral fastening features preferably are suitably strong to resist breakage when compressed together during mounting and released and held within the structure to which the protector is mounted, and also are resistant to heat, cold and extreme weather conditions, as well as corrosion and UV radiation. Some embodiments of the protectors may be formed from one or more sections, and include self-mounting fasteners that allow the protector to be mounted without the need for separate fasteners. The self-mounting protectors include protectors that have a single body section, as well as protectors that are formed by separate components that are assembled together (e.g., using welds, adhesives, fasteners or another connection). The protectors shown and described herein may be injection molded, and/or extruded, or produced using a combination of extrusion and injection molding. According to some embodiments, protector intermediate portions may be formed by extrusions, which may be separate extrusions or an extrusion that is separated into a plurality of intermediate portions. The first and second portions, whether formed together or separately, may be produced by any suitable manner. Preferred methods for the production and assembly of the protectors are disclosed herein. Features shown and described in connection with an embodiment may be implemented in other embodiments.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. Numerous other changes, substitutions, variations, alterations and modifications may be ascertained by those skilled in the art and it is intended that the present invention encompass all such changes, substitutions, variations, alterations and modifications as falling within the spirit and scope of the appended claims.
This application claims priority to and is a continuation of U.S. patent application Ser. No. 18/528,578, filed Dec. 4, 2023, the complete contents of which are herein incorporated by reference.
Number | Date | Country | |
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Parent | 18528578 | Dec 2023 | US |
Child | 18611803 | US |