Sliding support assembly for moveable point frog switching

Abstract

A solution is disclosed comprising a moveable point frog friction-reducing assembly configured for installation at or near a moveable point frog (also referred to as a swing nose crossing. The moveable point frog friction-reducing assembly is configured to use a sliding assembly to reduce friction between a moveable point and a supporting (sliding) plate. The sliding assembly is configured to reduce the effects of environmental hazards, including those leading to corrosion. A vertical tension assembly is configured to use materials that are low-cost and resilient to corrosion in order to maintain contact between the sliding assembly and the moveable point.

Description

SLIDING SUPPORT ASSEMBLY FOR MOVEABLE POINT FROG SWITCHINGBACKGROUND

[0001] Moveable point frogs (or swing nose crossings) are becoming more and more prevalent in the railway industry'. Traditional frog crossings are not well suited for all railways. Therefore, one use of moveable point frogs is for high-speed rail which provides a lower-carbon mode of transportation when compared to air travel. However, moveable point frogs have many maintenance and operational challenges.

[0002] One such challenge is maintaining the moveable point. Typically, the moveable point physically contacts a supporting (or sliding) plate when transitioning between wing rails. Lubricants are often applied between the moveable point and the sliding plate. However, lubricants are expensive to administer because human personnel apply the lubricant — often using hand tools and visual inspection. Further, the cost of the lubricant itself increases costs. In addition, lubricants require constant reapplication because the integrity of the lubricant degrades over time. For example, pollutants mix with the lubricant, thereby reducing the effect of the lubricant.

[0003] Using a mechanical solution in lieu of (or in addition to) lubricants may be desirable. However, a mechanical solution will be subject to the same operational conditions as lubricant. For example, pollutants may affect the integrity of a mechanical solution. For example, rollers and / or springs may have debris interfere with operation. Additionally, environmental factors, such as rain, may damage a mechanical solution as well. For example, rain may enter a mechanical part and freeze, thereby causing the part to seize. Corrosion from moisture is another risk.

[0004] What is needed is a solution to improve the interaction between the sliding plate and the moveable point. One such solution is disclosed herein.SUMMARY

[0005] A solution is disclosed for a moveable point frog friction-reducing assembly that may be configured for installation at or near a moveable point frog. The moveable point frog friction-reducing assembly may comprise a base plate assembly, a first wing clamp, wherein the first wing clamp may be operatively connected to the base plate assembly. The moveable point frog friction-reducing assembly may comprise a second wing clamp, wherein the second wing clamp may be operatively connected at the base plate assembly. The moveable point frog friction-reducing assembly may comprise a first horizontal tension assembly that may be operatively connected to the first wing clamp and the second wing clamp.

[0006] The moveable point frog friction-reducing assembly may further comprise a second horizontal tension assembly that may be operatively connected to the first wing clamp and the second wing clamp. The moveable point frog friction-reducing assembly may further comprise a first vertical tension assembly that may be operatively connected to the first wing clamp and the base plate assembly . The moveable point frog friction-reducing assembly may further comprise a second vertical tension assembly that may be operatively connected to the second wing clamp and the base plate assembly. The moveable point frog friction-reducing assembly may further comprise a first friction-reducing assembly that may be operatively connected to the base plate assembly.

[0007] The moveable point frog friction-reducing assembly may further comprise a sliding assembly, wherein the sliding assembly comprises a slide block. The second vertical tension assembly may further comprise a first hex bolt being disposed through the second wing clamp and the base plate assembly. Further, the second vertical tension assembly may comprise a first spring, wherein the first hex bolt is disposed through the first spring. The second vertical tension assembly may further comprise a washer, wherein the first hex bolt is disposed through the washer, and the washer is disposed below a ventral surface of the first spring. Further, the second vertical tension assembly may comprise a second spring, wherein the first hex bolt is disposed through the second spring, and the second spring is disposed below a ventral surface of the washer. The first spring and the second spring may be polymer, polyester, urethane, or a combination thereof.

[0008] The base plate assembly may further comprise a first plurality of holes, wherein the first plurality of holes is configured to operatively connect to the sliding assembly, and a second plurality of holes, wherein the second plurality of holes is configured to operativelyconnect to the sliding assembly. The slide block may be ultra-high molecular weight polyethylene C JHMWPE"). high-density polyethylene ( ‘FIDPE”). low-density polyethylene C’LDPE”), polytetrafluoroethylene (“PTFE”), Delrin ('‘acetal plastic”), or a combination thereof. The slide block may further comprise a ramp that is disposed about a perimeter of a dorsal surface of the slide block.

[0009] The slide block may further comprise a plurality of holes that is configured to support a plurality of bushings that is configured to compress the slide block and cause a plurality7of bolts to substantially lock into position when the slide block is installed into the base plate assembly. The plurality of bolts may be configured to receive a plurality7of nuts, wherein the plurality of nuts is configured to secure the plurality of bolts to a surface of the base plate assembly.

[0010] The slide block may comprise a plurality of cutouts near the plurality of holes, respectively and be configured to expose a portion of the plurality7of bushings and a portion the plurality of bolts to visual inspection. Further, the plurality of cutouts may be configured to allow moisture to drain away from the plurality7of bolts and the plurality7of bushings.

[0011] The base plate assembly may further comprise a first hole that is configured to operatively connect, via the first vertical tension assembly, the base plate assembly to the first wing clamp as well as a slotted hole that is configured to operatively connect the base plate assembly, via the second vertical tension assembly, to the second wing clamp.

[0012] The second wing clamp may further comprise a rail receiver having a first curved section and a second curved section, wherein the first curved section and the second curved section are configured to substantially fit the base of a rail. The sliding assembly may be disposed between the first horizontal tension assembly and the second horizontal tension assembly, further wherein the first horizontal tension assembly and the second horizontal tension assembly are adjustable without interfering with the sliding assembly.BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate exemplary aspects of the claims, and together with the general description given above and the detailed description given below, serve to explain the features of the claims.

[0014] FIG. 1A is a perspective view illustrating a moveable point frog friction-reducing assembly, as shown from a three-quarters perspective.

[0015] FIG. IB is a planar view illustrating a moveable point frog friction-reducing assembly, as shown from a top perspective.

[0016] FIG. 1C is a planar view illustrating a moveable point frog friction-reducing assembly, as shown from a rear perspective.

[0017] FIG. ID is a perspective view illustrating a moveable point frog friction-reducing assembly, as shown from a three-quarters perspective.

[0018] FIG. IE is a planar view' illustrating a vertical tension assembly, as shown from a front perspective.

[0019] FIG. 2A is a planar view illustrating a base plate assembly, as shown from a top perspective.

[0020] FIG. 2B is a planar view illustrating a base plate assembly, as shown from a side perspective.

[0021] FIG. 3A is a perspective view illustrating a wing clamp, as shown from a three- quarters perspective.

[0022] FIG. 3B is a planar view' illustrating a wing clamp, as shown from a side perspective.

[0023] FIG. 3C is a planar view illustrating a wing clamp, as shown from a top perspective.

[0024] FIG. 3D is a planar view illustrating a wing clamp, as shown from a rear perspective.

[0025] FIG. 4A is a perspective view' illustrating a sliding assembly, as shown from a three- quarters perspective.

[0026] FIG. 4B is a perspective view illustrating a sliding assembly, as shown from a three- quarters perspective.

[0027] FIG. 4C is a planar view illustrating a sliding assembly, as shown from a side perspective.

[0028] FIG. 4D is a planar view illustrating a sliding assembly, as shown from a top perspective.

[0029] FIG. 4E is a planar view illustrating a slide block, as shown from a top perspective.

[0030] FIG. 4F is a planar view illustrating a slide block, as shown from a side perspective.

[0031] FIG. 4G is a planar view illustrating a sliding assembly, as shown from a side cross- sectional perspective.

[0032] FIG. 4H is a planar view illustrating a sliding assembly, as shown from a side cross- sectional perspective.DETAILED DESCRIPTION

[0033] Various aspects will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. References made to particular examples and implementations are for illustrative purposes, and are not intended to limit the scope of the claims.

[0034] FIG. 1A is a perspective view' illustrating a moveable point frog friction-reducing assembly 101, as shown from a three-quarters perspective. The moveable point frog frictionreducing assembly 101 is generally configured to reduce the friction of a moveable point frog via installation at or near the moveable point frog. The moveable point frog friction-reducing assembly 101 is generally configured for installation at various rail gauges and is further configurable in the field in order to fit to the unique dimensions of a particular moveable point frog. In one aspect, multiple moveable point frog friction-reducing assemblies may be installed at various points of a single moveable point frog, i.e., at any point that may benefit from reduced friction during transition of the moveable point.

[0035] In order to provide reference to the viewer, a plurality of axes is provided, namely a first axis 103X, a second axis 103Y, and a third axis 103Z. The first axis 103X is perpendicular to the direction of travel of rolling stock traveling dow n a track. The second axis 103Y is parallel to the direction of travel of rolling stock traveling dow n the track. The third axis 103Z is the normal fonned by the axes 103X, 103Y — in other words, the vertical direction.

[0036] The moveable point frog friction -reducing assembly 101 comprises at least a base plate assembly 201. The base plate assembly 201 is operatively connected to a first wing clamp 301A and a second wing clamp 301B. The wing clamps 301 A, 301B are configured to provide operative connection to the bases of a rail that are, in turn, part of a moveable point frog.

[0037] The wing clamp 301 A is operatively connected to the base plate assembly 201 via a vertical tension assembly 131A via a hole (not shown). Similarly, the wing clamp 301B is operatively connected to the base plate assembly 201 via a vertical tension assembly 13 IB via a slotted hole 139. The slotted hole 139 provides adjustability along a first threaded rod 105A and a second threaded rod 105B. As such, the wing clamps 301A, 301B may be adjusted and attached to a rail (e g., at or near a moveable point frog).

[0038] A horizontal tension assembly 133B is comprised of a threaded rod 105B, a washer 107BB, a nut 109BB, a locking washer 108BB, and a lock nut 11 IBB. The nut 109BB is adjustable along the threaded rod 105B. The lock nut 1 11 BB and the locking washer 108BB provide a secondary source of tension to hold the wing clamp 301B in position. The lock nuts described herein may be nylon insert, distorted thread, and / or steel insert (i.e., security' nuts). Further, the lock nut 11 IB protects the horizontal tension assembly 133B from (1) vibration generated by passing rolling stock, (2) seismic shifting, and (3) tampering by malicious humans. The horizontal tension assembly 133B further comprises a second washer 107BA, a nut 109BA, a locking washer 108BA, and a lock nut 111BA at the opposing side of the second wing clamp 301 A. A second horizontal tension assembly 133 A is similarly comprised for the threaded rod 105A. The horizontal tension assemblies 133A, 133B are generally configured to fix the moveable point frog friction-reducing assembly 101 at or near the moveable point frog.

[0039] The vertical tension assembly 13 IB comprises several components that are illustrated, inter alia, in more detail in FIG. IE below. As shown, the vertical tension assembly 13 IB comprises at least a hex bolt 113B, a lock nut 115B, a wedge lock washer 119B, a nut 117B, a spring 157B, a spring 159B, and a square washer 141B. The head of the hex bolt 113B and the square washer 141B provide support to the force of the springs 157A. 159B. One of skill in the art will appreciate that alternative washers may be used in lieu of square washers (such as structural washers). Further, one of skill in the art will appreciatethat the washers (e g., the square washer 141B) may be any type of shape (e.g., circular, square, rectangular, etc.).

[0040] The vertical tension assemblies 131 A, 13 IB are generally configured to ensure the moveable point frog friction -reducing assembly 101 is operatively connected to the moving point of a moveable point frog. When the moveable point is transitioning between the wing rails, the moveable point is typically in contact with a sliding plate. As stated above, lubricants are traditionally applied to reduce friction between the ventral surface of the moveable point and the dorsal surface of the sliding plate. In order for the moveable point frog friction-reducing assembly 101 to reduce friction, the moveable point is raised via the a sliding assembly 901 such that the friction between the moveable point and the sliding plate is reduced (if not entirely eliminated).

[0041] To be clear, lubricants are not mutually exclusive with the utilization of the moveable point frog friction-reducing assembly 101. In the field, lubricants may still be administered by personnel, some of whom are not informed about the moveable point frog friction-reducing assembly 101. Likewise, lubricants may still provide a benefit and be administered intentionally. That stated, the moveable point frog friction-reducing assembly 101 is, as the name suggests, '■friction-reducing” and may be utilized with other compatible solutions in order to enhance the operation of moveable point frogs.

[0042] One of skill in the art will appreciate that the moveable point transitions from wing rail to wing rail to create a switching effect. To understand the functionality of the vertical tension assemblies 131 A, 13 IB, the two general states of the moveable point frog require some explanation. A “first state” relates to when the moveable point is unloaded, i.e., no rolling stock is passing through the moveable point frog. In the “first state,” the moveable point is free to transition between the wing rails to cause the intended switching effect. A “second state” relates to when rolling stock is passing over the moveable point frog. In the “second state,” the moveable point is under considerable loading forces and may be physically pressed into contact with the sliding plate.

[0043] In the “first state,” the vertical tension assemblies 131 A, 13 IB cause the sliding assembly 901 to lift the moveable point away from the sliding plate in order to reduce the friction betw een the ventral surface of the moveable point and the dorsal surface of the sliding plate. As such, the moveable point may transition across the sliding assembly 901instead of completely sliding across the sliding plate. Stated differently, in traditional operation during the “first state,” the moveable point is simply grinding on the sliding plate during transitions. Again, traditionally, lubricants ameliorate the grinding but, as stated, lubricants have drawbacks.

[0044] In the “second state.” the sliding assembly 901 is not substantially supporting sliding operations of the moveable point — since the moveable point is in a substantially fixed position. As such, the vertical tension assemblies 131A, 131B are not utilized to lift the moveable point away from the sliding plate because the rolling stock is pressing the moveable point into the sliding plate. One of skill in the art will appreciate that the moveable point is not typically intended to move when rolling stock is passing by but rather before (or after) rolling stock has passed by. That said, in the “second state,” the vertical tension assemblies 131 A, 131B are configured to absorb the loading forces from the rolling stock when passing through the moveable point frog. Without the operation of the vertical tension assemblies 131 A, 13 IB, the moveable point frog friction -reducing assembly 101 would simply snap away from the rail and not provide the intended benefits. In sum, the vertical tension assemblies 131 A, 131B provide a significant benefit compared to existing solutions.

[0045] One key takeaway is the vertical tension assemblies 131 A, 13 IB are configured to enable the sliding assembly 901 to maintain contact with the moveable point whether or not rolling stock is present as well as whether or not the moveable point is switching between wing rails. Therefore, the vertical tension assemblies 131 A, 131B provide an important aspect of providing necessary force to lift the moveable point during switching operations as well during the movement of rolling stock on top of the moveable point.

[0046] Turning back to the disclosed design elements of the vertical tension assemblies 131A, 131B, the springs 157B, 159B provide the elastic properties to maintain the desired contact between the sliding assembly 901 and the moveable point. The springs 157B, 159B are shown as a synthetic material (e.g., polyester). Polyester has the advantage of being relatively inexpensive while still providing the forces necessary' to enable the sliding assembly 901 to (1) maintain contact with the moveable point and (2) reduce the friction of the moveable point during switching operations.

[0047] One of skill in the art will appreciate that the springs 157B, 159B are resilient to corrosion when made of polymer, polyester, urethane, etc. Further, such materials are easilyrecognized in a degraded state via visual and / or physical inspection. In contrast, stainless steel will corrode over time, and technicians have difficulty in evaluating the extent of corrosion. For example, corrosion may only be on the surface and not affecting the integrity of the stainless steel. The springs 157A, 159B may simply be touched by personnel to determine integrity.

[0048] Belleville washers may be used for similar purposes as the springs 157B, 159B but have additional costs and risks due to the stainless-steel requirements necessary for railway deployments. Further, Belleville washers are easily affected by debris and pollutants which may cause one washer to fail, thus leading to a cascade of failures across all washers (which collectively form the Belleville Spring). Still further, Belleville washers are difficult to inspect since the washers are often disposed within a sleeve that obstructs a simple visual inspection. In contrast, the springs 157B, 159B are readily subject to visual inspection. To be clear, Belleville washers may satisfy the requirements of certain solutions but the benefits of the springs 157B, 159B are manifest for certain applications, as stated herein. For example, Belleville washers may have a larger lifting force that may be applicable when significant force is required; however, the total displacement may inadequate, so there exists a tradeoff.

[0049] In general, the wing clamps 301 A, 301B are in a substantially fixed position when the moveable point frog friction-reducing assembly 101 is installed at or near the moveable point. However, the vertical tension assemblies 131 A, 131B provide support for the moveable point while still providing any required movement along the axis 103Z.

[0050] A plurality of shims 15 IB is disposed between the wing clamp 301 B and the base plate assembly 201. The plurality of shims 151B provide for adjustability of the wing clamp 301B with respect to the base plate assembly 201 (and associated rail). The plurality of shims 15 IB is in contact with one another but may be separated such the count of shims maybe increased or reduced. For example, each shim may be 0.5 millimeters high in order to be combined to create a nominal height of 2.0 millimeters when four shims are combined. One of skill in the art will appreciate that the height of each shim may vary- in order to provide various degrees of adjustability (e.g., a 1.0-millimeter height for each shim may be selected, thus requiring only two shims to generate a nominal height of 2.0 millimeters).

[0051] The vertical tension assembly 131 A is similarly configured as the vertical tension assembly 13 IB, as shown in the instant view. However, the vertical tension assembly 131 A is configured to remain in position via a hole (not shown) and not via a slotted hole (e.g., the slotted hole 139). Therefore, the wing clamp 301 A is generally intended to be placed into position first and the wing clamp 301B is intended to be moved along the slotted hole 139 such that the moveable point frog friction-reducing assembly 101 is fixed in position at or near the moveable point frog.

[0052] The base plate assembly 201 is generally configured to support the sliding assembly 901. The components of the sliding assembly 901 are disclosed in fuller detail at FIG. 4A through FIG. 4H, inter alia. The sliding assembly 901 is generally configured to reduce the friction of the moveable point when the moveable point transitions from position to position (e.g., substantially along the axis 103X). For example, the sliding assembly 901 enables the ventral surface of the moveable point to travel without unnecessary grinding with any sliding plates disposed below the moveable point.

[0053] One particular advantage of the disclosed solution is the ability' to replace the sliding assembly 901 without substantially reconfiguring the horizontal or vertical installation of the moveable point frog friction-reducing assembly 101. For example, the base plate assembly 201 may be removed in order to replace the sliding assembly 901. Thus, reduced maintenance costs are achieved as well as increased safety.

[0054] The sliding assembly 901 comprises at least a slide block 911. The slide block 911 may be formed from ultra-high molecular weight polyethylene (“UHMWPE”), high-density polyethylene (“HDPE”), low-density polyethylene (“LDPE”), polytetrafluoroethylene (“PTFE”), Delrin (“acetal plastic”), or a combination thereof, in one aspect.

[0055] One advantage of the slide block 91 1 is durability' while still providing the necessary' coefficient of friction. In particular, UHMWPE is a relatively inexpensive material that can be deployed at lower cost than other similar materials. One of skill in the art will appreciate that the material used has a lower coefficient of friction than that of steel (of which the moveable point and / or sliding plate is often comprised).

[0056] A plurality of hex bolts 905Z is configured to pass through the slide block 911 and through the base plate assembly 201. A plurality of top lock nuts 907Z (not shown in the instant view) secure (at the ventral surface of the base plate assembly 201 ) the plurality’ ofhex bolts 905Z. As such, the slide block 911 is secured to the base plate assembly 201. FIG. 2B. inter alia, shows pluralities of holes 213A, 213B through which the plurality of hex bolts 905Z may pass.

[0057] FIG. IB is a planar view illustrating the moveable point frog friction-reducing assembly 101 , as shown from a top perspective. The orientation of the vertical tension assemblies 131 A, 13 IB is more clearly shown. Further, the slotted hole 139 is more visible in order to demonstrate the movement of the wing clamp 301B. One of skill in the art will appreciate that the sliding assembly 901 may be installed along various positions of the base plate assembly 201.

[0058] FIG. 1C is a planar view illustrating the moveable point frog friction-reducing assembly 101, as shown from a rear perspective. The instant view shows in more detail the springs 157B, 159B. A hex bolts 113A, 113B are shown as passing through a hole 207 and the slotted hole 139, respectively. The square washers 141A. 141B are substantially in contact with the ventral face of the base plate assembly 201 . The hex bolts 1 13 A, 113B are substantially in contact with the square washers 141 A, 141B. One of skill in the art will appreciate that the vertical tension assemblies 131 A, 131B are positioned such that the moveable point frog friction-reducing assembly 101 may receive shocks within the rails while still providing stability’ during moveable point transitions.

[0059] One of skill in the art will appreciate that additional or fewer springs may be used in lieu of the springs 157B, 159B in order to achieve the desired vertical tension — and associatively the desired reduced friction (as stated above). By providing reduced friction, the movable point avoids excessive contact with any supporting (sliding) plate such that the need for lubricant is reduced if not entirely eliminated. As such, maintenance costs are reduced and safety is enhanced. For instance, human personnel may not be required to administer lubricant by hand.

[0060] FIG. ID is a perspective view illustrating the moveable point frog friction-reducing assembly 101, as shown from a three-quarters perspective. The instant view depicts the ventral side of the moveable point frog friction-reducing assembly 101 in more detail. The washers 141 A, 141B are shown as being in contact with the base plate assembly 201.Further, the hex bolts 113A, 113B are operatively connected to the washers 141A, 141B. Asshown, the head of the hex bolts 113A, 113B are disposed on the ventral side of the base plate assembly 201.

[0061] The plurality of top lock nuts 907Z is more clearly shown in the instant view. One of skill in the art will appreciate how the slide block 911 is fixed in position at the pluralities of holes 213A, 213B. As such, the entire sliding assembly 901 is adjustable along the axis 103X.

[0062] FIG. IE is a planar view illustrating the vertical tension assembly 13 IB, as shown from a front perspective. The vertical tension assembly 13 IB has been disclosed above wherein some design elements have been articulated. The instant view depicts and discloses the components of the vertical tension assembly 13 IB in more detail. The instant view is intended to be understood as part of this disclosure as a whole.

[0063] As shown, the vertical tension assembly 13 IB comprises at least the hex bolt 113B, the lock nut 115B, the wedge lock w asher 119B, the nut 117B, a plurality of flat w ashers 152B, the spring 157B, a w asher 154B, the spring 159B, and a plurality of flat washers 153B. The pluralities of flat w ashers 152B. 153B act as a bearing surface to maintain similar bolt lengths, namely for the hex bolts 113A, 113B. The wedge lock washer 119B is generally configured to prevent the lock nut 1 15B from disengaging.

[0064] FIG. 2A is a planar view illustrating the base plate assembly 201, as shown from a top perspective. The plurality of holes 213A is comprised of a first hole 213AA and a last hole 213AZ — as w ell as any number of intervening holes (e.g., as those show n in the instant view). Likewise, the plurality of holes 213B is comprised of a first hole 213BA and a last hole 213BZ — as well as any number of intervening holes (e.g., as those shown in the instant view). One of skill in the art will appreciate that the number of holes within the pluralities of holes 213A, 213B is mirrored such that the sliding assembly 901 may be positioned along the axis 103X of the base plate assembly 201.

[0065] FIG. 2B is a planar view illustrating the base plate assembly 201, as shown from a side perspective. A distance 229 is formed from the ventral face of the base plate assembly 201 to an axis 231 in order to highlight that the ventral face of the base plate assembly 201 is designed with enhanced structural integrity. The enhanced structural integrity better supports the moveable point. As such, safety is enhanced. Further, maintenance costs are reduced because the base plate assembly 201 has a longer operational life.

[0066] FIG. 3A is a perspective view illustrating the wing clamp 301B, as shown from a three-quarters perspective. The wing clamp 301B comprises a first horizontally oriented slotted hole 305BA and a second horizontally oriented slotted hole 305BB. The slotted holes 305BA, 305BB are configured such that the threaded rods 105 A, 105B may pass through the wing clamp 301B, respectively. The slotted nature of the slotted holes 305BA, 305BB provides for improved fitment with the rail such that excessive forces do not act upon the threaded rods 105 A. 105B (and associated components and / or assemblies). Likewise, the wing clamp 301 A has reciprocal slotted holes 305AA, 305AB (not shown in the instant view) and the holes 305 AA, 305AB are similarly configured as the holes 305BA, 305BB (again to receive the threaded rods 105A, 105B, respectively).

[0067] The wing clamp 301B comprises a vertically oriented hole 307B, disposed in parallel to the axis 103Z. The hole 307B is configured such that the bolt 113B may pass through the wing clamp 301B. The wing clamp 301A comprises a similarly configured hole 307A (not shown in the instant view). The holes 307A, 307B enable the vertical tension assemblies 131A, 131B to affix the wing clamps 301A, 301B in place on the dorsal side of the base plate assembly 201.

[0068] A rail receiver 315B is disposed on the inner face of the wing clamp 301B. Similarly, the wing clamp 301 A comprises a rail receiver 315A (not shown in the instant view), again facing inwardly. The rail receiver 315A is configured to be used in conjunction with the rail receiver 315B in order to operatively affix the moveable point frog frictionreducing assembly 101 to the base of a rail (not shown in the instant view). As shown in the instant view, the rail receiver 315B is configured for a standard rail. However, the profile of the rail receiver 315B may be machined and / or formed in order to fit other rail profiles without departing the disclosed solution.

[0069] FIG. 3B is a planar view illustrating the wing clamp 301B, as shown from a side perspective. The holes 305BA, 305BB are facing toward the viewer, along the axis 103X. The hole 307B is parallel to the axis 103Z.

[0070] FIG. 3C is a planar view illustrating the wing clamp 301 B, as shown from a top perspective. The hole 307B is facing toward the viewer, along the axis 103Z. The holes 305BA, 305BB are oriented in parallel to the axis 103X.

[0071] FIG. 3D is a planar view illustrating the wing clamp 301B, as shown from a rear perspective. The rail receiver 315B comprises a first curved section 321BA and a second curved section 321BB. Similarly, the wing clamp 301 A comprises a first curved section 321 AA and a second curved section 321 AB (both not shown in the instant view). The curved sections 321BA, 321BB are configured to provide substantial contact with the rail with which the wing clamp 301B is in contact. In general, more surface contact with the rail is desirable in order to increase operative connection and stability. One of skill in the art will appreciate that the wing clamps 301 A, 301B may not comprise curved sections if the rail profile has other shapes (e.g., a rectangular shape comprising no curved sections).

[0072] A distance 317BA and a distance 317BB are present to provide fitment with the base of a rail against which the wing clamp 301B fits. Similarly, the wing clamp 305A comprises a first distance 317AA and second distance 317BA — again to accommodate fitment with the rail.

[0073] FIG. 4A is a perspective view7illustrating the sliding assembly 901, as shown from a three-quarters perspective. The sliding assembly 901 is configured to being attached to the base plate assembly 201. The slide block 911 comprises a plurality of holes 915Z which is, in turn, comprised of a first hole 915AA, a second hole 915AB. a third hole 915BA, and a fourth hole 915BB. The plurality of holes 915Z enables the installation of the slide block 911 on a dorsal side of the base plate assembly 201. Specifically, the holes 915BA, 915BB are configured to be aligned with the plurality of holes 213B. Likewise, the holes 915AA, 915AB are configured to be aligned with the plurality of holes 213A.

[0074] A plurality of bushings 913Z is comprised of a first bushing 913 AA, a second bushing 913AB, a third bushing 913BA, and a fourth bushing 913BB. The plurality' of bushings 913Z is configured to be fitted into the plurality of holes 915Z. The plurality of bushings 913Z is configured such that a dorsal surface of the slide block 911 is free from interference by the plurality of bushings 913Z. Stated differently, the plurality of holes 915Z is configured such that the plurality of bushings 913Z is seated at or below7a dorsal surface of the slide block 911. One of skill in the art w ill appreciate that having the plurality of bushings 913Z at or below the dorsal surface of the slide block 911 enables the movement of the moveable point without significant interference.

[0075] The plurality of hex bolts 905Z is configured to being installed into the plurality of bushings 913Z. At the ventral side of the base plate assembly 201, a plurality of nuts 907Z is utilized to fix the plurality of hex bolts 905Z in position. The plurality of nuts 907Z comprises the first nut 907AA, the second nut 907 AB, a third nut 907BA, and a fourth nut 907BB. One of skill in the art will appreciate that washers, lock nuts, or a combination thereof may be utilized in addition to the plurality of nuts 907Z in order to secure the sliding assembly 901 in place.

[0076] A ramp 920 is present at a dorsal perimeter of the sliding block 911. The ramp 920 provides a deflection angle in the event that the moveable point approaches the slide block 911 at a lower angle than intended. For instance, the moveable point may approach the slide block 911 and then be deflected toward the dorsal surface of the slide block 911 without causing undesired interference with the slide block 911. Without the ramp 920, there is a non-trivial risk the moveable point strikes the sliding block 911 and causes damage.

[0077] FIG. 4B is a perspective view illustrating the sliding assembly 901, as shown from a three-quarters perspective. The instant view shows the sliding assembly 901 substantially assembled but not operatively connected to the base plate assembly 201. A plurality of cutouts 930Z is shown in the slide block 911. The plurality of cutouts 930Z comprises a first cutout 930AA, a second cutout 930AB, a third cutout 930BA, and a fourth cutout 930BB.

[0078] The plurality of cutouts 930Z is generally configured to enable several benefits. First, the plurality of cutouts 930Z enables tool access to the plurality of hex bolts 905Z. For example, a wrench may access (along the axis 103Y) the hex head of the hex bolt 905AA via the cutout 930AA. Alternatively, a socket head may access (along the axis 103Z) the hex head of the hex bolt 905AA via the cutout 930AA. Thus, the plurality' of cutouts 930Z enable multiple methods of adjustment and control. Given the difficult conditions at railway tracks, said multiple methods are critical for personnel who are working in the field with varying tools.

[0079] Second, the plurality of cutouts 930Z enables drainage of pollutants and liquids. When the slide block 911 is in position on the base plate assembly 201, the sliding assembly 901 will naturally be subject to weather. If water accumulates around the plurality of hex bolts 905Z, the water may freeze and prevent access and / or adjustment via tools. However, the plurality' of cutouts 930Z enable water to drain away from the plurality of hex bolt 905Zsuch that this risk is reduced significantly. In the worst case, personnel will still have access (along both the axes 103Y, 103Z) to remove any accumulated water and ice. With respect to pollutants, accumulated chemicals and debris may be similarly detected and removed.

[0080] Third, the plurality' of cutouts 930Z enable visual inspection of the plurality of hex bolts 905Z and the plurality of bushings 913Z. Again, the profile as viewed from the axes 103Y, 103Z is subject to visual inspection. One of skill in the art will appreciate that the plurality of hex bolts 905Z is a form of steel and will corrode. Therefore, visual inspection is critical to ensure safe operation of the moveable point frog.

[0081] FIG. 4C is a planar view illustrating the sliding assembly 901, as shown from a side perspective. The instant view illustrates the sliding assembly 901 as would be seen without the base plate assembly 201. Again, the base plate assembly 201 is configured to being disposed between the plurality of nuts 907Z and the ventral side of the slide block 911.

[0082] FIG. 4D is a planar view illustrating the sliding assembly 901, as shown from atop perspective. The instant view illustrates the plurality of hex bolts 905Z as installed through the plurality of holes 915Z (which is obscured from the instant view).

[0083] FIG. 4E is a planar view illustrating the slide block 91 1, as shown from a top perspective. The instant view more clearly shows the plurality of holes 915Z.

[0084] FIG. 4F is a planar view illustrating the slide block 911, as shown from a side perspective. The instant view shows the plurality of holes 915Z when the plurality of hex bolts 905Z is not installed.

[0085] FIG. 4G is a planar view illustrating the sliding assembly 901. as shown from a side cross-sectional perspective. The instant view depicts a first gap 910AB between the bushing 913AB and the dorsal surface of the base plate assembly 201. Similarly, a second gap 910BB is shown between the bushing 913BB and the base plate assembly 201. The gaps 910AB, 910BB provide a locking function for the plurality of hex bolts 905Z due to the slight compression of the slide block 911. One will recall the slide block 911 may comprise a material that compresses with force (unlike, stainless steel for instance).

[0086] With excessive force (e.g., torque), the plurality of bushings 913Z will still stop at the dorsal surface of the base plate assembly 201 in order to protect the integrity of the slideblock 911. However, the locking functionality will still be generated by the slight compression of the slide block 911 against the dorsal surface of the base plate assembly 201 and the plurality of bushings 913Z.

[0087] One of skill in the art will appreciate that each of the plurality of bushings 913Z is disposed over a plurality of gaps 910Z, all of which are substantially similar. The plurality of gaps 91 OZ comprises the first gap 910AA (not shown in the instant view), the second gap 910AB, a third gap 910BA (not shown in the instant view), and a fourth gap 910BB. The distribution of the plurality of gaps 91 OZ provides for a substantially even locking force for each of the plurality of hex bolts 905Z and the plurality of nuts 907Z. respectively.

[0088] FIG. 4H is a planar view illustrating the sliding assembly 901 , as shown from a side cross-sectional perspective. The instant view is a cutaway and zoomed-in view of the gap 910AB in order to highlight the size and shape of the plurality of gaps 910Z.

[0089] The preceding description of the disclosed aspects is provided to enable any person skilled in the art to make, implement, or use the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the claims. Thus, the present disclosure is not intended to be limited to the aspects illustrated herein but is to be accorded the widest scope consistent with the claims disclosed herein.

Claims

AMENDED CLAIMS received by the International Bureau on 28 February 2025 (28.02.2025)1. A moveable point frog friction-reducing assembly (101) configured for installation at or near a moveable point frog, the moveable point frog friction-reducing assembly (101) comprising: a base plate assembly (201); a first wing clamp (301A), the first wing clamp (301A) being operatively connected at the base plate assembly (201); a second wing clamp (301B), the second wing clamp (301B) being operatively connected at the base plate assembly (201); a first horizontal tension assembly (133A), the first horizontal tension assembly (133 A) being operatively connected to the first wing clamp (301 A) and the second wing clamp (301B); a second horizontal tension assembly (133B), the second horizontal tension assembly (133B) being operatively connected to the first wing clamp (301 A) and the second wing clamp (301B); a first vertical tension assembly (131A), the first vertical tension assembly (131A) being operatively connected to the first wing clamp (301A) and the base plate assembly (201); a second vertical tension assembly (131B), the second vertical tension assembly(13 IB) being operatively connected to the second wing clamp (301B) and the base plate assembly (201); and a sliding assembly (901), the sliding assembly (901) comprising a slide block (911).

2. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the second vertical tension assembly (13 IB) further comprises: a first hex bolt (113B), the first hex bolt (113B) being disposed through the second wing clamp (301B) and the base plate assembly (201); and a first spring (157B), the first hex bolt (113B) being disposed through the first spring (157B).

3. The moveable point frog friction-reducing assembly (101) of claim 2, wherein the second vertical tension assembly (13 IB) further comprises: a washer (154B), the first hex bolt (113B) being disposed through the washer (154B), the washer (154B) being disposed below a ventral surface of the first spring (157B); anda second spring (159B), the first hex bolt (113B) being disposed through the second spring (159B), the second spring (159B) being disposed below a ventral surface of the washer (154B).

4. The moveable point frog friction-reducing assembly (101) of claims 3, wherein the first spring (157B) and the second spring (159B) is polymer, polyester, urethane, or a combination thereof.

5. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the base plate assembly (201) further comprises: a first plurality of holes (213 A), the first plurality of holes (213 A) being configured to operatively connect to the sliding assembly (901); and a second plurality of holes (213B), the second plurality of holes (213B) being configured to operatively connect to the sliding assembly (901).

6. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the slide block (911) is ultra-high molecular weight polyethylene (“UHMWPE”), high-density polyethylene (“HDPE”), low-density polyethylene (“LDPE”), polytetrafluoroethylene (“PTFE”), Delrin (“acetal plastic”), or a combination thereof.

7. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the slide block (911) further comprises: a ramp (920), the ramp (920) being disposed about a perimeter of a dorsal surface of the slide block (911).

8. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the slide block (911) further comprises: a plurality of holes (915Z), the plurality of holes (915Z) being configured to support a plurality of bushings (913Z), the plurality of bushings (913Z) being configured to compress the slide block (911) and cause a plurality of bolts (905Z) to substantially lock into position when the slide block (911) is installed into the base plate assembly (201).

9. The moveable point frog friction-reducing assembly (101) of claim 8, wherein the plurality of bolts (905Z) is configured to receive a plurality of nuts (907Z), the plurality of nuts (907Z) being configured to secure the plurality of bolts (905Z) to a surface of the base plate assembly (201).

10. The moveable point frog friction-reducing assembly (101) of claim 9, wherein the slide block (911) comprises a plurality of cutouts (930Z) near the plurality of holes (915Z).

11. The moveable point frog friction-reducing assembly (101) of claim 10, wherein the plurality of cutouts (930Z) is configured to expose a portion of the plurality of bushings (913Z) and a portion the plurality of bolts (905Z) to visual inspection.

12. The movable point frog friction-reducing assembly (101) of claim 10, wherein the plurality of cutouts (930Z) is configured to allow moisture to drain away from the plurality of bolts (905Z) and the plurality of bushings (913Z).

13. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the base plate assembly (201) further comprises: a first hole (207), the first hole (207) being configured to operatively connect, via the first vertical tension assembly (131A), the base plate assembly (201) to the first wing clamp (305A); a slotted hole (139), the slotted hole (139) being configured to operatively connect the base plate assembly (201), via the second vertical tension assembly (13 IB), to the second wing clamp (30 IB).

14. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the second wing clamp (301B) further comprises: a rail receiver (315B) comprising: a first curved section (32 IB A); a second curved section (321BB), the first curved section (321BA) and the second curved section (321BB) being configured to substantially fit the base of a rail.

15. The moveable point frog friction-reducing assembly (101) of claim 1, wherein the sliding assembly (901) is disposed between the first horizontal tension assembly (133A) and the second horizontal tension assembly (133B), further wherein the first horizontal tension assembly (133A) and the second horizontal tension assembly (133B) are adjustable without interfering with the sliding assembly (901).

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