U.S. Design Patents D618,755, issued on Jun. 29, 2010; D619,185 S, issued Jul. 6, 2010; and D665,646, issued Aug. 21, 2012, all to Beata Handra and Charles Sinek, are incorporated by reference in their entireties, including diagrams, into the present patent application.
The present invention relates to improvements for guards to protect blades of ice skates.
Ice skates are well known for sport and recreation, including a variety of shoe, boot and blade designs for leisure, learning, dancing, racing, and hockey. Ice skate blades are generally made of plates of metal which have been shaped and sharpened using a grinder to achieve certain desired performance objectives.
When a user of an ice skate is off the ice and walking on another surface type, such as concrete, wood, carpet, foam, rubber or tile, the user often attaches a skate guard to the bottom edges of the blade to protect the blade from damage and dulling, and to protect the floor surface from the sharpened edges of the skates.
An improved skate blade guard is disclosed having one or more improvements of a Y-shaped blade receiving channel, drains for conducting melted ice out of the blade receiving channel, voids or slots that perform as shock absorbers and cushions during walking in the skate guards, an improved pick guard, improved manufacturability using exterior shape sculpting to promote even and consistent flow of molten resin during injection molding, and a tread that conforms to the curved shape of some skate blades.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. The figures presented herein, when considered in light of this description, form a complete disclosure of one or more embodiments of the invention, wherein like reference numbers in the figures represent similar or same elements or steps.
The present inventor(s) have improved upon the known structures, mechanisms and design of guards for attaching to the runner portion of ice skate blades to protect the edges of the blades and the non-ice surfaces upon which a wearer may walk. The present inventors have previously disclosed in U.S. Design Patents D618,755; D619,185 S; and D665,646 a two-piece skate guard in which a front portion and a rear portion are attached to each other by a pair of stretchable springs such that the two portions can be attached to a blade by hooking a first end of the guard, such as a toe end, onto the blade, and then stretching the guard lengthwise to attach a second end, such as the heel end, and releasing such that the spring draws the two portions together, securely latching it onto the blade. Further, the interior of the previously-disclosed skate guards were provided with a V-shaped channel for receiving the skate blade and securing it by a friction fit.
Another unique aspect about the previously-disclosed designs was a method for providing a universal fit using only one common component. The single component could be used as a front portion or a back portion, in pairs to create a complete guard. To size a guard for a larger (longer) or smaller (shorter) skate size, a cutter device was provided which allowed a technician to cut one or both of the components at their interconnection end, and then to assemble the sized components together using to springs in side channels and fasteners.
Still another unique aspect about the previously-disclosed designs was the ability to use two components fabricated in different colors to create a single guard, so that a user could personalize the guard with a wide number of color combinations to help the distinguish their guards from those of other skaters on the same team or in the same class, and to provide consumer affinity to the product.
Over the years since these previously-disclosed designs were put into production and they have become very widely used and enjoyed, the present inventors have observed how they are used and how they operate in broad practice. The following disclosure provides one or more improvements to the previously-disclosed designs, mechanisms and components to further increase the foregoing objectives and benefits of the product as well as to provide additional objectives and benefits which will be evident in the following paragraphs. The present improvements may be utilized in the previously-disclosed two-piece spring loaded designs, as well as in other designs having a single-piece fabricated to a specific skate size and in multi-piece designs of more than two guard components.
Referring now to
The distal end 101 is provided with a pick guard which, in this example embodiment, comprises a rounded lower tip 108 and a distal wall 107 that slopes back towards the proximal end 102 from the lower tip 108 as it rises, with a similar shape being provided on the interior of the distal wall 107 to capture an end (toe or heel) of the blade when attached.
Turning to
Also shown in
Referring now to
As such, as a wearer begins to fit and attach the guard onto a blade, typically while the skate is still on the foot of the wearer when exiting the ice arena, the blade first loosely enters the top segment of the Y-channel where it can be easily and blindly located due to the extra width of the Y-channel at this point in the attachment process. After the user has initially located the blade edge into the loose first segment of the Y-channel, the user continues to press the guard onto the blade, at which time the edge of the blade contacts one or both of the sloping walls of the second segment of the Y-channel. With continued pressure on the guard, the edge of the blade is guided or “funneled” into the narrowest (third) segment of the Y-channel, where the width is sufficiently narrow enough and the depth 503 is sufficiently deep enough to provide friction contact with the sides of the blade thereby retaining it into the slot. In this particular example, the depth of the third segment of the Y-channel is about 0.08″.
To attach the guard system (two or more guard components) to a blade, after the first guard component, such as a front component, is firmly attached to the first end of the blade, the user may stretch the second component of the guard towards the other end of the blade, such as towards the heel of the skate, and attach the second guard component by pressing it on to seat the blade into the Y-channel and releasing the second guard component. At this point, the skate guard is secured onto the blade by two mechanisms—the longitudinally stretched spring and the friction of the Y-channel.
Still referring to
Further Details for Particular Improvements. Referring now to
Still further in this comparison, one can see that the drain holes 305, 306 are added to the new design and were not part of the previous product. Not only do they act as drains to discharge melted ice from the blade receiving channel 104, and also the voids that they comprise reduce the amount of plastic further to produce each unit, and they also help reduce the thickness of the material in the same area of the previous product, thereby improving costs, cure times, yield rates and quality. In some embodiments, these cored out drain vents may also act as a type of shock absorber or cushion to reduce impact to the wearer as they walk with the units on their skate blades.
With reference to
Still further in this comparison, one can see the differences between the two-segmented-wall V-shaped blade-receiving channel of the previous product 900 and the new three-segment Y-shaped blade receiving channel 511, 512, and 513 of the example embodiment 100 according to the present invention. This comparison makes clear the advantage of the improved channel design which is wider for a deeper segment, allowed for greater freedom of movement when putting the blade protector onto a blade, which is often down while standing on one foot and lifting the other foot to snap the protector onto the raised foot's skate blade.
The same example units are compared side-by-side from a top-down perspective in
Improvements for Manufacturability. As can be seen from the angled view of
It is well known in the plastic injection molding and fabrication arts that molten resin may experience a number of problems as it is injected and flowed into and through a mold cavity that includes various thicknesses, voids, shapes, and volumes. Imperfections in the final product such as cold flow lines can occur due to thickening or premature solidification of the molten plastic prior to the mold's cavity filling completely. Cure cycles may be extended due to overly thick portions of the item taking much longer than thinner portions to solidify, thereby slowing production rates and increasing costs. Where mold cavity thicknesses vary, a hesitation effect may occur in which the molten resin moves preferentially into the thicker (larger) voids leaving thinner areas empty or filled later or even non-filled areas, thereby causing a variety of cosmetic and potentially quality (strength, hardness, elasticity, etc.) issues in the final product. Overpack refers to a similar possibility of molds with varying thicknesses in which the preference of the molten resin to fill the larger voids first can lead to warping of the final item.
Due to these challenges, the present skate guard includes surface shapes and contours which are not only attractive and distinctive for brand recognition, they also manage the cross sectional area of the skate guard component to be essentially consistent as the resin flows lengthwise (longitudinally) into the mold. For example, when there is a particular void at a particular point in the longitudinal structure, such as a void for a drain vent, this reduction of cross sectional area of the mold at this point is offset by a thickening or thinning of the wall just above or below the vent. In this manner, the resin finds essentially consistent resistance or conductivity to flow at every point along the length of the mold, except for the pick guard tip, of course. According to at least one embodiment of the present invention, such as the embodiment illustrated, a plurality of sculpted indentations and projections on exterior surfaces of the skate guard component compensate the fabrication material volume to offset changes in fabrication volumes for one or more voids, cuts, curves and angles in the skate guard component such that cross-sectional fabrication material area remains essentially constant during longitudinal flow of resin, thereby enhancing plastic molding operations by minimizing thereby improving costs, cure times, yield rates and product quality.
Improved Fastener Retainer. As can be seen in
For example, if springs are used to attach the segments of the skate guard together, the ends of the springs may be secured to the skate guard components using a threaded bolt and nut. The hole cored out of the plastic molded product may be formed with a short, straight side (i.e., secant), as shown, such that the threads of the bolt can be pushed through the hole while slightly engaging the secant side without requiring rotating of the bolt to pass it through the hole. Then, when the user tips or rotates the skate guard component to attach a nut onto the end of the bolt, the bolt is kept from falling out of the hole, thereby allowing easier and quicker assembly.
Multi-Segment Embodiment. There is an embodiment of the present invention which allows for a greater degree of customization, especially with respect to colors. In a skating environment, such as a practice or a competition, many skaters may have removed their skate guards and left them on the ground, near chairs or benches, or tucked under bags, etc. For a first objective, skaters would like to be able to quickly identify which skate guards are their own, such as by color. While the foregoing description of example embodiments allows for a wide array of one-color (front and back sections match in color) and two-color (front section is a different color than the back section) combinations, the number of combinations are finite. For a second objective, some skaters may wish to use 3 or more colors in order to match colors of a team, state, university, country or other personal representation, such as red, white and blue, or green, black and red, or even an approximation of a rainbow.
The presently disclosed and illustrated segmented design lends itself to assembling skate guards using two, three or more segments of different colors, either at the factory, dealer or by the end user.
Referring now to
Likewise, one or more additional half-guard units 1202, 1203, and 1204, are cut to yield three more segments such as green 1202′, purple 1203′, and yellow 1204′ for assembly into multi-segment, multi-color skate guard 1210. The assembly 1210 is held together by a one or more springs 1205 received into the spring slots 505 and 506, and secured at either end, such as by one or more screws, fasteners, rivets, and/or posts.
In its normal state, the spring(s) 1205 is(are) slightly stretched, thereby providing a front-to-back compressive force pulling the end segments 1201′ and 1202′ towards each other, thereby capturing any center segments such as 1203′ and 1204′ between the end segments, and holding all the segments in linear alignment. When putting the guard onto a skate blade or removing it from a skate blade, the user pulls the front or rear segment away from the rest of the guard assembly, thereby opening the skate blade channel in a lengthwise fashion to allow entry or exit of the blade from the channel. Any center segments remain captured by the one or more springs in their spring slots during attachment and removal to and from a skate blade.
The unused segments (shown by the large X's) in this example process 1200 may be discarded, returned to the manufacturer for plastic recycling, or kept for use in future skate guard assemblies. In this manner, skate guards can be easily and quickly assembled with two, three or more segments, and the segments may all be the same color or may be of a variety of colors. Further, due to spring-in-channel alignment design, the segments may be of varying lengths or of equal lengths, providing for a nearly infinite number of combinations of colors and stripe patterns. While a preferred embodiment uses springs for the alignment and retention force, other resilient stretchable devices and materials may be used such as rubber bands, elastic strips, and stretchable tubing, some of which may offer certain advantages such as decreased weight, color options, and avoidance of rust or metal corrosion.
Curve-conforming Track Embodiment. According to at least one embodiment of the present invention, the skate guard is configured to curve and adapt to a curved bottom edge of a skate blade. Such curvature can be seen in
Conclusion. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof, unless specifically stated otherwise.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the invention. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
This is a continuation patent application of and claims benefit of the filing date U.S. patent application Ser. No. 18/454,297 (agent docket FGP23CZS1), filed on Aug. 23, 2023, by Charles Sinek.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 18454297 | Aug 2023 | US |
| Child | 19056409 | US |