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  Sports boot shell with comfort sockUSPTO Application #: 20060090376Title: Sports boot shell with comfort sock Abstract: A sports boot shell of which at least a part of the wall is composed of a sock covered with a rigid material in plastics material, wherein the sock includes, on its inner surface, an insulating means limiting losses of heat by radiation, which may be a polyurethane coating that includes aluminum particles or aluminum pieces bonded on the inner surface. The process for manufacturing such a boot comprises the step of lasting the sock prior to injection-overmolding of plastics material in order to form the wall of the shell. (end of abstract) Agent: Frommer Lawrence & Haug - New York, NY, US Inventors: Riccardo Perotto, Pascal Roux USPTO Applicaton #: 20060090376 - Class: 036117600 (USPTO) Related Patent Categories: Boots, Shoes, And Leggings, Boots And Shoes, Occupational Or Athletic Shoe (e.g., Roof Climbing, Gardening, Etc.), Athletic Shoe Or Attachment Therefor, For A Sport (e.g., Skating, Skiing, Etc.) Featuring Relative Movement Between Shoe And Ground, For Walking Or Sliding On Shifting Media, Ski Boot, The Patent Description & Claims data below is from USPTO Patent Application 20060090376. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] The invention relates to a sports boot shell or sports boot shell subassembly and also to the sports boot itself, and is particularly suited to the field of boots for boards for gliding, such as skiing or snowboarding, or skating boots, which are subjected to significant stresses during use and for which a particularly robust structure is required, although they must offer a high level of comfort, particularly as regards warmth. The invention also relates to a process for manufacturing such a shell. [0002] A ski boot is a good example of a sports boot that, on the one hand, has to be very robust and, on the other, has to offer a high level of comfort. Indeed, such a boot is subject to numerous stresses during use and consequently has to be very strong. A high level of stiffness is also required in order to achieve a good performance on the part of the boot, which, as intermediary between the skier and the ski, transmits the skier's effort to the ski in order to guide the latter. However, its constraints in terms of comfort are also significant. The boot must, in particular, have sufficient flexibility to enable the skier to open it in order to put it on and to take it off, enable him to flex his knees forward in order to ski, and provide him with sufficient comfort, particularly in terms of warmth, despite being used in extreme temperature conditions and in a wet, aggressive environment. DESCRIPTION OF THE PRIOR ART [0003] As a response to these significant, contradictory constraints, prior-art boots are composed of a stiff upper into which a liner is inserted. The stiff upper is composed of a shell surrounding the foot and a collar articulated on this shell and surrounding the lower leg. This upper is made from stiff material and is produced via a process of dual injection-molding of two plastics materials of different stiffness, in which the quantity of each of these materials is stipulated for each zone of the upper in order to satisfy the requirements for stiffness and comfort. The role of the inner liner for accommodating the foot is to guarantee the skier's comfort. [0004] Such conventional boots present the following drawbacks: [0005] the upper is often too uncomfortable for the skier and the liners do not sufficiently offset this weakness in order to achieve a satisfactory overall level of comfort; [0006] the upper requires complex liners in an attempt to obtain maximum comfort; [0007] the upper is unattractive. [0008] Patent FR 1 565 339 describes a solution that is slightly different and consists in providing a lining inside the shell and a manufacturing process based on the overmolding of a plastics material over this lining shaped in a mold. This solution is, however, insufficient to fulfill the comfort and stiffness constraints. [0009] Patent EP 1 172 042 describes a boot consisting of a flexible upper in a textile material in the form of a boot and of a shell injection-molded in relatively stiff plastic, the upper and the shell being secured together by means of the injection-molding of a flexible plastics material between the flexible upper and the shell, via the bottom. This solution is, however, insufficient to fulfill the comfort and stiffness constraints. [0010] There is therefore a need for another solution that attempts to fulfill the stiffness and comfort constraints, particularly in terms of warmth, mentioned above. SUMMARY OF THE INVENTION [0011] An object of the present invention consists in proposing a sports boot that does not present the drawbacks of the prior art. [0012] More precisely, a first object of the present invention consists in proposing a sports boot that offers good comfort, particularly in terms of warmth, and presents satisfactory stiffness. [0013] A second object of the invention consists in proposing a sports boot that is esthetically attractive. [0014] A third object of the present invention consists in proposing a sports boot whose manufacturing process remains simple. [0015] According to the concept of the invention, the sports boot is based on an upper whose comfort is improved by means of a wall comprising an inner comfort sock that has insulating thermal properties with regards to thermal radiation. [0016] More precisely, the invention is based on a sports boot shell of which at least part of the wall is composed of a sock covered with a rigid layer in a plastics material, wherein the sock includes, on its inner surface, an insulating means limiting losses of heat by radiation. [0017] The insulating means may consist of pieces of aluminum sheet bonded to the inner surface of the sock or of a polyurethane coating that includes particles of material possessing properties of reflection of thermal radiation, these particles possibly being made from aluminum. [0018] According to a further variant embodiment, the polyurethane coating forms a first inner layer of the sock, which is covered by an intermediate foam layer insulating against conduction of heat, then by a third layer in a compatible material in order to allow overmolding of a plastics material. [0019] The sock may occupy a wide surface surrounding the foot and be connected to a part in flexible plastics materials forming at least one flap over the instep, which may itself be linked to a very flexible part, in leather, plastics or fabric, in order to form at least one very flexible flap. [0020] Advantageously, the stiff plastics material then covers the sock and its link with the flexible plastics material. A third plastics material may also cover the border zone between these two plastics materials. [0021] The invention also relates to a sports boot, and is particularly adapted for a ski boot that includes a shell as described above. Continue reading... Full patent description for Sports boot shell with comfort sock Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Sports boot shell with comfort sock patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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