Patent Application
20230122436
This patent application claims priority from Italian patent application no. 102021000026984 filed on Oct. 20, 2021, the entire disclosure of which is incorporated herein by reference.
The present invention relates to a thermal-insulating inner-boot for mountain boots and a high thermal-insulation mountain boot.
More specifically, the present invention relates to a removable thermal-insulating inner-boot for mountain boots and a mountaineering boot preferably suitable for crampons. Use to which the following description will make explicit reference without thereby losing generality.
As is well known, mountaineering boots are sports footwears with high thermal insulation, which are structured to allow the user to walk, in relative safety, on glaciers and snow-covered surfaces at altitudes generally higher than 4000-5000 metres, i.e. in particularly severe and adverse climatic and environmental conditions.
The mountaineering boots currently on the market basically consist of a leather and/or synthetic waterproof upper, which is shaped so as to accommodate and protect the user's foot and leg usually up to the base of the calf, is internally lined with a lining made of thermal-insulating material, and is suitably stiffened by a front toe cap and a rear counter, both usually made of rigid plastic material; of a rigid sole with a cleated-profile, which is stably fixed underneath the upper by sewing and/or gluing so as to cover the entire sole of the user's foot, and is provided with a tread in elastomeric material with a high friction coefficient; and a lace or other manually-operated closing system, which is capable of tightening the upper on the user's foot.
Furthermore, the best mountaineering boots currently on the market are also provided with a perimeter protective band made of high-strength elastomeric material, traditionally called ‘fodrone’ in Italian, which surrounds and covers the lower part of the upper while joining to the underlying sole, so as to protect the upper from impact and/or abrasion.
In addition, the mountaineering boots described above also include an internal thermal-insulating inner-boot, separate and distinct from the upper, which is shaped substantially like a boot so as to accommodate and protect the user's foot and lower leg, and is inserted in easily removable manner within the upper so as to further increase the thermal insulation capability of the footwear.
In the most sophisticated mountaineering boots currently on the market, the internal thermal-insulating inner-boot basically consists of a series of pieces of fabric coupled with polymeric material foam or other thermal-insulating material, double-lined and with a thickness of 3-6 mm, which are joined together along the perimeter edge/hem by sewing and/or gluing; and a thick inner lining in fleece or other soft and thermal-insulating material.
Unfortunately, while offering very high protection from the cold, the thermal-insulating inner-boots described above are particularly laborious to produce, with the high production costs that this entails.
In addition, the thermal-insulating inner-boots described above have a poorly flexible and non-breathable structure, so the drying of the inside of the inner-boot usually takes a long time, with the operating limitations that this entails.
In fact, in the high mountains, it is extremely dangerous to use mountaineering boots that are not perfectly dry on the inside, because the temperature can reach such low values that even traces of moisture/condensation inside the thermal-insulating inner-boot are rapidly frozen, thereby exposing the user's foot to the risk of chilblains and other diseases.
Aim of the present invention is to provide a thermal-insulating inner-boot for mountaineering boots, which is simpler and cheaper to produce and, with the same thermal insulation, is also lighter, more flexible and more breathable than those currently on the market.
In accordance with these aims, according to the present invention there is provided a thermal-insulating inner-boot for mountain boots as defined in claim 1 and preferably, though not necessarily, in any one of the claims dependent thereon.
According to the present invention there is moreover provided a mountain boot as defined in claim 16 and preferably, though not necessarily, in any one of the claims dependent thereon.
The present invention will now be described with reference to the accompanying drawings, which illustrate a non-limiting embodiment thereof, wherein:
With reference to
In addition, the thermal-insulating inner-boot 1 is particularly adapted to be incorporated/used in a mountain boot 100 with high thermal insulation, preferably of a type suitable for mountaineering at altitudes above 4000-5000 metres.
In other words, the mountain boot 100 is preferably a mountaineering boot, optionally suitable for crampons.
With reference to
More specifically, the upper 101 is preferably mainly made of leather and/or synthetic fabric, optionally waterproof, and is preferably internally lined with a lining of soft and/or thermal-insulating material (not visible in the figures). The front toe cap and/or rear counter, on the other hand, are preferably made of rigid plastic material.
The sole 102, in turn, preferably includes one or more superimposed layers of polymeric material foam, advantageously with closed cells, and is preferably stiffened by a plate-like core made of plastic material (not visible in the figures). Preferably, the tread of sole 102 is moreover made of vulcanized rubber or other elastomeric material with a high friction coefficient.
Finally, the sole 102 is preferably also provided with a front insert and a rear insert which are substantially rigid and preferably made of plastic material, emerge outside of sole 102 and are preferably shaped so as to allow the fitting of ice crampons.
With reference to
More specifically, protective band 103 is preferably substantially annular in shape so as to surround the lower part of upper 101 preferably seamlessly, and is stably fixed to the upper 101 preferably by sewing and/or gluing. Preferably, the protective band 103 furthermore joins the underlying sole 102 seamlessly along the entire perimeter of the sole.
With reference to
More specifically, gaiter 104 is preferably shaped roughly like an overturned funnel, optionally so as to contain substantially the entire upper 101, and is inferiorly attached to the upper 101 preferably by sewing and/or gluing.
The zip 105, on the other hand, is placed on the gaiter 104 so that the user can quickly open the gaiter 104 to make it easier to insert the foot into the footwear.
In addition, gaiter 104 preferably has a waterproof structure and is preferably stably attached to the upper 101 underneath the additional protective band 103. Preferably, the gaiter 104 is moreover provided with an elasticated collar 106, which is capable of tightening directly on the user's leg spaced above the top of the upper 101, so as to keep the gaiter 104 in place on the user's leg.
The zip 105, in turn, is preferably of the watertight type, and preferably extends along the gaiter 104, roughly from the area above the upper front part of the upper 101 to the upper opening of the gaiter 104, or rather to the collar 106.
With reference to
The manually-operated closing system of the boot 100 is thus adapted to tighten the main upper 101 against the thermal-insulating inner-boot 1.
The thermal-insulating inner-boot 1, in addition, has a sock-like structure comprising: a soft and flexible upper 2 with a thermal-insulating structure, which is shaped roughly like an overturned funnel and is dimensioned so as to cover the user's foot and lower part of the leg preferably roughly up to the base of the calf; and a soft and flexible plate-like insole 3 with a thermal-insulating structure, which is arranged to close the lower opening of the upper 2 so as to cover the sole of the user's foot.
In other words, the plate-like insole 3 is substantially complementary in shape to the lower opening of the upper 2, and is firmly and stably attached to the upper 2, or rather to the lower edge/hem of the upper 2, preferably by sewing and/or gluing, so as to completely close the opening.
Preferably, the thermal-insulating inner-boot 1 moreover includes a soft and flexible protective sole 4, preferably with a waterproof structure, which is arranged to cover substantially the entire bottom or outer face of the insole 3 and optionally also at least part of the lower edge of the upper 2, and is stably attached to the insole 3, and optionally to the upper 2, preferably by sewing and/or gluing.
With reference to
In addition, said cavity-wall is preferably substantially annular in shape and is preferably arranged on the upper 2 so as to surround the user's foot, advantageously seamlessly and preferably while remaining substantially flush/contiguous with/to the insole 3.
More specifically, the thermal-insulating upper 2 has at least a first sector with a double-layer knitted fabric structure, which is preferably contiguous with the insole 3 and comprises: a first flap of knitted fabric that extends grazing a first side of the sheet/piece of thermal-insulating material; and a second flap of knitted fabric, which is made in one piece with the first flap of knitted fabric by the knitting machine and extends grazing the sheet/piece of thermal-insulating material on the side opposite the first flap of knitted fabric, so as to form a pocket containing said sheet/piece of thermal-insulating material.
In other words, the second flap of knitted fabric has a first margin stably joined to the first flap of knitted fabric substantially seamlessly, i.e. without sewing.
The cavity-wall of the knitted fabric structure is clearly formed within said pocket.
Preferably, the second flap of knitted fabric is moreover firmly attached to the first flap of knitted fabric, advantageously by sewing and/or gluing and/or heat sealing, also along a second hem opposite and/or complementary to the first margin, so as to close the pocket.
In addition, the second flap of knitted fabric preferably faces the inside of the upper 2 and is preferably made at least partially of thermal-insulating yarns. More specifically, the second flap of knitted fabric is preferably made entirely of thermal-insulating yarns.
Preferably, the thermal-insulating upper 2 moreover has at least one second sector contiguous to said first sector, which has a single-layer knitted structure that joins substantially seamlessly, i.e. without sewing, the double layer knitted structure of the first sector.
In other words, the first and second sectors of the thermal-insulating upper 2 are made in one piece by a knitting machine, without connecting sewings.
Preferably, the single-layer knitted structure is moreover made at least partially of elastic and/or thermal-insulating yarns.
More specifically, with reference to
The top tubular segment 2a is preferably shaped so as to accommodate/contain the lower part of the user's leg and, advantageously, also the upper part of the user's foot.
The bottom tubular segment 2b, on the other hand, is shaped so as to accommodate/contain at least the lower part of the user's foot and adjoins the insole 3. In other words, the insole 3 is arranged to close the opening of the bottom tubular segment 2b.
In the example shown, in particular, the boundary line between the tubular segments 2a and 2b is preferably placed on the upper 2 spaced below the tibiotarsal joint. Clearly, the boundary line
is a closed line.
With reference to
More specifically, the top tubular segment 2a preferably comprises a flap of knitted fabric 5 of appropriate thickness, which substantially copies the shape of the top tubular segment 2a, i.e. is shaped so as to cover the lower part of the user's leg, and preferably has a single-layer elastic knitted structure so as to be able to adapt to the morphology of the user's leg.
Preferably, the flap of knitted fabric 5 is moreover made at least partially of elastic and/or thermal-insulating yarns.
In the example shown, in particular, the flap of knitted fabric 5 has a nominal thickness preferably ranging between 1 and 8 mm (millimetres), and preferably has a texture (i.e. the weaving pattern of the weft and warp yarns) with a substantially vertical ribbed knit, so as to have an elastic behaviour.
In addition, the flap of knitted fabric 5 is preferably also made at least partially of hollow-fibre thermal-insulating yarns, such as Primaloft polyester, or the like.
With reference to
This double-layer knitted structure, in addition, is preferably shaped so as to form a large annular pocket, which surrounds the user's foot and is substantially entirely filled/occupied by one or more sheets of soft and flexible thermal-insulating material.
Preferably, the annular pocket of the double-layer knitted structure of the bottom tubular segment 2b is also adjacent/contiguous to the insole 3.
With reference to
Preferably, the sheet(s) of thermal-insulating material is/are also stably attached to one or both flaps of knitted fabric 6 and/or 7, advantageously by gluing.
More specifically, the flap of knitted fabric 7 preferably substantially copies the shape of the flap of knitted fabric 6, i.e. the shape of the bottom tubular segment 2b, and has the upper edge/margin that substantially seamlessly joins the flap of knitted fabric 6, so as to form, with the flap of knitted fabric 6, a large pocket 8 substantially annular in shape, which surrounds the user's foot substantially seamlessly.
In the example shown, in particular, the flap of knitted fabric 7 is preferably superiorly joined to the flap of knitted fabric 6 along the boundary line between the tubular segments 2a and 2b. In other words, the flap of knitted fabric 7 seamlessly joins the flap of knitted fabric 6 and the flap of knitted fabric 5, along the boundary line
.
In addition, the lower edge/hem of the flap of knitted fabric 7 is preferably firmly attached to the flap of knitted fabric 6, preferably by sewing and/or gluing.
Preferably, the nominal thickness of the flap of knitted fabric 6 and/or flap of knitted fabric 7 is also less than the nominal thickness of the flap of knitted fabric 5.
Furthermore, the flap of knitted fabric 7 is preferably made of yarns different from those of the flap of knitted fabric 6, and/or preferably has a texture (i.e. the weaving pattern of the weft and warp yarns) different from that of the flap of knitted fabric 6.
More specifically, the flap of knitted fabric 7 is preferably made entirely of thermal-insulating yarns, and preferably has a tighter weave than that of the flap of knitted fabric 6.
The flap of knitted fabric 6, on the other hand, is preferably made of yarns with high shear strength and/or abrasion resistance.
In the example shown, in particular, the flap of knitted fabric 7 is preferably made entirely of hollow-fibre thermal-insulating yarns, such as Primaloft polyester or the like, whereas the flap of knitted fabric 6 is preferably made entirely of polyamide yarns, and more conveniently of nylon yarns.
With reference to
Preferably, the sheets of thermal-insulating material 9 and 10 are moreover firmly attached to each other and/or to the flaps of knitted fabric 6 and 7 by gluing.
In addition, the inner sheet of thermal-insulating material 9, i.e. the sheet of thermal-insulating material grazing the flap of knitted fabric 7, is preferably made of polymeric material foam with open cells. Instead, the outer sheet of thermal-insulating material 10, i.e. the sheet of thermal-insulating material grazing the flap of knitted fabric 6, is preferably made of fleece or other non-woven fabric.
Preferably, the nominal thickness of the outer sheet of thermal-insulating material 10 is furthermore greater than that of the inner sheet of thermal-insulating material 9.
Clearly, the position of the sheets of thermal-insulating material 9 and 10 may also be reversed.
With reference to
More specifically, in the example shown, the insole 3 is preferably firmly attached to the flaps of knitted fabric 6 and 7 of the bottom tubular segment 2b via Strobel sewing, and is preferably made up of two superimposed layers of polymeric material foam 11 and 12, advantageously with open cells, which preferably differ from each other in density and/or stiffness and/or hardness and/or polymeric composition, and are stably coupled to a sheet of synthetic support fabric 13.
Clearly, the sheet of synthetic fabric 13 may be replaced by a sheet of felt or the like.
With reference to
Moreover, the protective sole 4 preferably also consists of a solid, compact patch of polymeric material having a nominal thickness preferably ranging between 1 and 3 mm, is preferably substantially in the shape of an oblong basin, and is dimensioned so as to completely cover the bottom face of the insole 3 and preferably also at least part of the lower edge of the upper 2.
Operation of the thermal-insulating inner-boot 1 and of the mountain boot 100 is easily inferable from the above description, and therefore requires no further explanation.
The advantages connected to the particular structure of the thermal-insulating inner-boot 1 are noteworthy.
Firstly, the knitted-structure upper 2 makes it easier to assemble the thermal-insulating inner-boot 1, with the costs reduction that this entails. The assembly of the thermal-insulating inner-boot 1, in fact, requires a fewer number of sewings that a traditional thermal-insulating inner-boot.
Furthermore, with the same thermal insulation, the knitted-structure upper 2 is enormously more breathable than the corresponding part of a traditional thermal-insulating inner-boot, making it much quicker to dry the inside of the footwear after use.
Lastly, thanks to the knitted-structure upper 2, the thermal-insulating inner-boot 1 is much softer and more flexible than a traditional thermal-insulating inner-boot, and is therefore more comfortable to wear.
The thermal-insulating inner-boot 1, in fact, can adapt much better to the morphology of the user's foot and leg.
It is finally clear that modifications and variations may be made to the thermal-insulating inner-boot 1 and/or to the other components of the mountain boot 100 without however departing from the scope of the present invention.
For example, the flap of knitted fabric 7 of the bottom tubular segment 2b may extend over the flap of knitted fabric 6.
In addition, the texture (i.e. the weave pattern of the weft and warp yarns) of the flap of knitted fabric 6 and/or the flap of knitted fabric 7 may change according to the position on the upper 2.
Furthermore, in a less sophisticated embodiment, the cavity-wall formed by the knitted fabric structure of the upper 2, i.e. the pocket 8 bounded by the two flaps of knitted fabric 6 and 7, may also be substantially U- or C-shaped, so as to only embraces, for example, the toe or heel of the user's foot.
In other words, the cavity-wall formed by the knitted fabric structure of the upper 2, i.e. the pocket 8 bounded by the two flaps of knitted fabric 6 and 7, may be oblong in shape and may be located on the upper 2 so as to at least partially embrace the user's foot.
Finally, in a more sophisticated embodiment, also the top tubular segment 2a may be equipped with a double-layer knitted structure, which seamlessly joins the knitted structure of the bottom tubular segment 2b, and has at least one inner pocket preferably annular in shape, which is occupied/filled with one or more sheets/pieces of soft, flexible thermal-insulating material of sufficient thickness.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102021000026984 | Oct 2021 | IT | national |
