EP2772151A1 - Shoe with active air ventilation - Google Patents

Abstract

The shoe has a sole construction having an air pumping reservoir (10) that is arranged in an upper sole portion (1). An air supply device and an air removal device are connected with reservoir. The upper sole portion, lower running shoe portion (2) and reservoir are arranged such that air in a pumping chamber is sucked above upper sole portion into reservoir through air supply device due to relief of sole construction, and air in pumping chamber is discharged into interior of shoe through air removal device due to loading of sole construction during walking motion of user.

Description

Field of the invention

The present invention relates to a shoe with a sole construction, in which with each step of the walking movement of a user an efficient air circulation in the shoe and thus directly at the foot of the user of the shoe is made possible.

Background of the invention

A shoe consists of two main parts, namely the upper part, called the shank, and the lower part, the floor. The shank may include an inner shank (chuck), intermediate shank (intermediate chuck) and outer shank (upper leather). The floor consists of at least one sole and may include an insole (insole) and an outsole. Between inner and outsole, one or more midsoles may be provided.

Nowadays, shoes are known which are equipped in the sole with devices which are supposed to favor the air circulation in the shoe, whereby the internal moisture in the shoe is to be reduced in order to improve the foot comfort of the user of the shoe. This known shoe type generally provides hollow connections, which are accommodated in the sole interior connected to one another. According to a common variant, in the prior art, air is to be directed from outside to inside through openings in the sole. The openings are sealed with membranes to protect against water. However, it has been found that in this way no efficient fresh air supply is possible.

According to another variant, it may be provided to suck in air from outside through an air pump device via an air guide whose open end is guided upwards in a shaft. The disadvantage of this type of shoes is the lack of efficiency of air circulation in the shoe due to the inefficient Aspiration of the air by means of the air pump device. So will in the WO 00/01266 proposed to introduce an air pump device in a cavity of a shoulder of an outsole, which is to suck in air from the outside and through the sole body through an air supply, which is guided along the rear shaft of a shoe upwards. However, it has been found that by simply loading the air pumping device through the heel of a user in the shoe during the walking movement, the pumping mechanism operates so inefficiently that no significant ventilation of the shoe interior is possible.

In the WO 2008/156860 a ventilation device for insertion into a shoe is described in which by means of a hinged to a flange rotatable pump ventilation of a shoe interior, in which the ventilation device is used, is to be achieved. However, the ventilation device is structurally very complicated and mechanically prone to failure with the movable pump device.

It is therefore the object of the present invention to provide a shoe with a sole construction which ensures a more efficient and more permanent air circulation with the simplest possible structural structure than could hitherto be achieved in the prior art.

Description of the invention

The above object is achieved by a shoe according to claim 1, ie by a shoe with
a sole construction having an upper sole part, a lower sole part and an air pumping device,
wherein the air pumping means is formed either by a cavity substantially recessed in the upper sole portion or separately formed as an independent entity entirely or partially in a cavity of the upper sole portion;
an air supply device which is connected to the air pump device,
an air discharge device, which is connected to the air pump device,
wherein the upper sole portion, the lower sole portion and the air pumping means are formed such that
through the relief of the sole construction during a walking movement of a user, air can be sucked into the air pump device through the air supply device from outside the shoe and above the upper sole part,
by the load of the sole construction during the walking movement of the user, air can be expelled through the air discharge device into the interior of the shoe and the air pump device can be compressed by a pump volume corresponding to the amount of ejectable air,
wherein the pumping volume is at least 5 ml, in particular at least 10 ml.

According to the invention, the sole construction, or the upper sole part, the lower sole part and the air pump device, is designed such that it allows at least 5 ml, in particular at least 10 ml, air (fresh air) when expanding the air pump device from the outside (outside of the sole construction or the shoe with the sole construction) and at least 5 ml, in particular at least 10 ml, of air are expelled when compressing the air pumping device into the interior of the shoe. Only then can a significant felt by a user of the shoe ventilation of the shoe interior can be achieved. In contrast to the prior art, the shoe according to the invention thus allows efficient ventilation of the shoe interior.

The pumping volume of an air pump device is determined here for a given sole construction as follows:

To carry out a PC-controlled machine PFI DSPM-H 3035 (PFI-Hydraulic Shock Absorption Testing Machine), refer to the testing and research institute Pirmasens, Marie-Curie-Strasse 19, 66953 Pirmasens. The contact pressure of the circular plunger with a diameter of 40 mm is in the measurement of the pumping volume according to the invention 1200 N. The plunger is positioned as follows (see FIGS. 6a to 6d ).

First, the straight line g1 along the lower sole part with the greatest length of all straight lines extending from the outermost edge of the heel portion of the lower sole portion to the outermost edge of the toe portion of the lower sole portion is determined. At 27 hundredths of its length measured from the point P1 at the outermost edge of the heel region through which the determined straight line g1 passes, the perpendicular s1 to the determined straight line g1 is determined ( FIG. 6a ). Then, the center M1 of this perpendicular s1 is detected with respect to the points P2 and P3 at which it intersects the lateral edges of the lower outsole part ( FIG. 6b ). The distance of 27 hundredths is motivated by the fact that a foot length of 270 mm (shoe size 42 EU) corresponds to a heel length of 72.5 mm according to DIN EN 12743: 1999 (see Jens Heidenfelder, development of a dynamic test for testing the hindfoot damping of running shoes by means of biomechanical measurement methods, dissertation, Chemnitz University of Technology, Faculty of Human and Social Sciences, November 2010, page 97 ff.).

Then the straight line g2 (first test axis) is defined by the points P1 and M1. Half of the distance from P1 to M1 on the line g2 defines the center point M2 (positioning point) ( FIG. 6c ). The test stamp is positioned centrally on this center point M2 (positioning point). This is done, for example, by means of a second test axis g3, which is drawn perpendicular to the first test axis g2 and through its center M2 (positioning point) extending in addition to the first test axis g2. The radius of the test stamp can then be marked on the test axes g2 and g3 ( FIG. 6d ). By slowly lowering the test stamp before the test, the outsole can be positioned exactly, making sure that the test stamp does not put any pressure on the material. Corresponds to the positioning of the plunger markings marked, the outsole part is fixed with brackets so that no shifting of the outsole part is possible.

An air inlet hose, Festo (pneumatic 10 bar at RT) PUN - 8 x 1.25 (inner diameter: 6 mm / outer diameter: 8 mm), is introduced through an opening in the outsole part and completely sealed on the outsole. Through the air inlet hose, an air pump device recessed in the heel region sucks in air via an air inlet valve. In the forefoot area, 8 cm from the outsole edge point (towards the heel), center of the bale, an air outlet tube, Festo (pneumatic 10 bar at RT) PUN - 8 x 1.25 (inner diameter: 6 mm / outer diameter) is prepared through a further opening prepared in the outsole. 8 mm), through which the air pump device discharges air via an outlet valve. The forefoot area of the sole construction is sealed during the continuous load test to check the amount of airflow. Air flow is measured using a Bürkert Mass Flowmeter Type 8701 with a nominal flow rate of 1 l / min, available from Christian Bürkert GmbH & Co. KG, Christian-Bürkert-Strasse 13-17, 74653 Ingelfingen.

The air can be ejected in exemplary developments of the shoe according to the invention in particular along air ducts, such as channels or a mesh fabric, the sole structure, which are connected to the air pumping device, and openings of the air ducts (channels) in the shoe interior of a shoe with the sole construction , Under a mesh fabric is here a textile or plastic insert with a net-like structure, for example, a so-called MATATZEN structure understood.

The air pump device may be formed substantially in the upper sole part. The feature that the air pumping device is formed substantially in the upper sole part means that the air pumping device is formed at least more than 50% in the upper sole part (and less than 50% in the lower sole part), even though they are made total by cooperation of the upper sole part and the lower sole part may be formed. In particular, this feature may state that the air pump device is formed in the upper sole part at least more than 80%, in particular more than 90%, in particular more than 95%.

In the present application, the terms upper, upper, etc., refer to positions further away from a ground contacting the sole construction when used in a shoe than positions referred to by terms such as below, lower, and so on.

In particular, the upper sole portion may include channels formed with the air pumping means connected to the channels and formed substantially in the upper sole portion. Air is then pumped by the air pumping device along the channels. Apertures may be provided along the channels in the upper sole portion such that air passing through the channels passes through the apertures to above the upper sole portion, i. into the interior of a shoe, can get. For example, the air can pass through a perforated insole in the shoe interior. By the pumping action of the air pump device under load from a user's foot, air (at least 5 ml, especially at least 10 ml) is thus pumped through the channels and the openings provided therein for ventilation of the foot into the shoe interior in which the foot is located.

The lower surface of the lower outsole part thus contacted in use of the shoe according to the invention with the sole construction the trodden by a user of the shoe substrate. Said upper sole part and lower sole part of the sole construction may be formed separately, but they may also form parts of an integrally formed sole body, so that they form an integral block.

According to the invention, air is sucked in from outside the sole construction and outside the shoe, in particular from above the upper sole part, and distributed into the channels by the air pump device. Here, the air supply device can be guided by a correspondingly provided opening of the upper sole part upwards. The air pumping device is configured to perform an air pumping function in response to a walking movement of a user of the shoe with the sole structure alternately carrying air (at least 5 ml, especially at least 10 ml) through at least one air guide when released by the user's foot (Air supply device) from outside the sole construction or the shoe and, when the air pump device is loaded by the user's foot, air (at least 5 ml, in particular at least 10 ml) is distributed over the channels in the shoe. The air pumping device may be provided in the heel region extending from the foot end to the hinge region in the middle hinge region and / or the ball region (forefoot region) extending from the foot front to the hinge region.

In the sole construction, at least the part of the upper sole part in which the air pump device is formed may be formed more elastically than the lower sole part. This part is designed to be more elastic than the lower outsole part such that the air pump device is well compressible when loaded by a user's foot. By this elastic training, an efficient pumping effect can be achieved.

By making the part of the upper sole part, in which the air pump device is formed, more elastic than the lower sole part, an efficient pumping action can be achieved. When loaded by a user's foot, this more resilient area is forced downwards (towards the tread) and thus can actuate the air pumping device to push air out of the air pumping device and through the channels.

The pumping effect can be further assisted by the fact that the lower outsole part on the outer running surface (which in the course of a walking movement is in contact with the ground on which a user of the shoe according to the invention runs with the sole construction) has a raised area in the area of the air pumping device which is adapted to be pressed under load by the foot of a user in the direction of the upper sole part. The raised area may be thinner than the remaining areas of the lower outsole part. Thus, by the fact that the raised area is pressed under load, not only ensures efficient air circulation, but it is also increased by the shock-absorbing function of the air pump device running comfort.

In fact, for example, a particularly efficient air ventilation of the shoe by a combination of a) the provision of the air pumping device, for example, substantially in the upper sole part, b) providing the part of the upper sole part, in which the air pumping device is formed so that it is more elastic as the lower outsole portion is formed, and c) the provision of the raised portion at the lower sole portion at the outer tread in the area of the air pumping device.

According to alternative embodiments, the air pumping means is formed by a substantially recessed in the upper sole portion cavity, or it is the air pumping means separately formed as an independent entity and completely or partially embedded in a cavity of the upper sole portion. The volume fraction of the cavity formed in the upper sole portion is greater than that provided by the lower sole portion in the formation of the cavity functioning as the air pumping means. In particular, the cavity can be designed to be more than 80%, in particular more than 90%, in particular more than 95%, in the upper sole part. According to a development, the air pump device is provided in the form of a cavity filled with an air-permeable elastic filling material.

The use of only one formed cavity as the air pumping device simplifies the manufacturing process, reduces the manufacturing cost and can increase the reliability and life of the air pumping device. The use of a separately designed as an independent entity air pump device can improve the efficiency of air circulation.

For example, the air pump device may comprise a plastic pump reservoir as an independent entity. This is compressed when a user's foot rests on it, which squeezes air out of the plastic pump reservoir. If, during walking, the plastic pump reservoir is again relieved of the foot, it expands and, due to the negative pressure previously created, draws in air from the outside, which is freshly available for the subsequent ventilation of the shoe interior and hence the foot of a user. Furthermore, the air pump device can be integrally formed in one piece with the plastic pump reservoir and the air ducts. The formation of the air pump device as a separate entity allows an independent of the sole construction or the sole body material selection and in particular material strength.

According to one example, hoses may also be provided by the air pumping device along the channels in which air flows from the air pumping device. In this case, the hoses must have openings corresponding to those which may be provided in the upper sole part. The hoses can be made of silicone, for example. Generally, plastic hoses having openings along their longitudinal axes and in fluid communication with the air pumping device may be used.

As already mentioned, the upper sole portion and the lower sole portion may be formed separately, or the upper sole portion and the lower sole portion may be integrally, so integrally formed. In the first case, the upper sole portion and the lower sole portion may be formed of different materials, or may be formed of the same material. In the latter case, the sole structure can be formed around a separate, independently formed air pumping device, such that the upper sole part is more elastic (due to different thicknesses) than the lower sole part at least in the area of the air pumping device. The sole construction is made here of an elastic material, for example by plastic injection.

The shoe described in the above examples may comprise in the air supply means a first valve adapted to let air pass only in the direction from outside the sole construction into the air pumping means and / or to arrange a second valve in the air discharge means such that is formed so that it allows air only in the direction of the air pump device to the channels.

It can be sucked in outside air depending on Gehphase by the air pump device and The previously sucked air can be ejected into the air ducts, such as the channels. If in the appropriate walking phase the foot of a user does not bear on the air pumping device, this air (at least 5 ml, especially at least 10 ml) from outside the sole construction (especially from above the upper sole part) via the corresponding air supply device sucks when the foot on She loads, pumps the air (at least 5 ml, especially at least 10 ml) through the appropriate air discharge device into the channels, from where they up to the foot of a user, for example, through openings, which are provided in the channels at the top effective ventilation of the foot of the user is pressed.

Thus, there is provided a shoe having a sole construction which provides improved air circulation in a simple construction by walking or running motion alone without the need for significant enlargement over conventional sole constructions without air circulation. In this development, the valves provided allow efficient control of the air flows through the air ducts into and out of the air pump device.

Instead of two valves controlling the air flow, a single directional control valve may be provided such that it only allows air to pass in the direction from outside the sole construction into the air pumping device and air only in the direction from the air pumping device to the air ducts, for example ducts. In particular, the directional control valve may be a shuttle valve that regulates the airflow as described above depending on the pressure applied by the foot of a user.

The air discharge device may be in the form of a hose or channel; it can also be provided only in the form of an outlet of the air pump device, in particular an air reservoir of the air pump device. In particular, the at least one air supply device and / or the at least one air discharge device may comprise a flexible hose and / or a covered duct or in each case from a flexible hose, for example from Plastic, consist. If a plurality of air supply means and / or air discharge means are provided, they may all comprise or consist of a hose, or some and not all of the air ducts may each comprise or consist of a hose. Furthermore, the air ducts may be formed integrally with a plastic pump reservoir of the air pump device. According to these examples, the air ducts can permanently and tightly direct the air to the air pump device and from there to ventilate at least a part of the sole body and finally the shoe interior in a simple and cost-effective manner.

The air supply device can be guided upwards, so that air can be sucked in from a position above the upper sole part from the outside. For example, the air supply device in a shank region of a shoe, which comprises the sole construction according to the invention, end, in order to allow the intake of fresh air through the air pumping device. When the air supply device ends above the upper sole part, it is substantially avoided that dirt and / or moisture is sucked into the air pump device.

In fact, for example, a particularly efficient ventilation of the shoe by a combination of a) the provision of the air pumping device, for example, substantially in the upper sole part, b) the provision of the part of the upper sole part, in which the air pump device is formed so that it is more elastic c) providing the raised area at the lower outsole part at the outer tread in the area of the air pumping device, and d) providing the first air guide so that it slides upwards, in particular in a shank region of a shoe above, so that air can be sucked from a position above the upper sole part from the outside.

The air supply device can be provided for example by means of a molded-on heel part. The molded heel part may comprise an outer and an inner heel part. Between the outer and the inner part of the molded Heel part then air is sucked from outside the shoe of the air pumping device. Thus, air may be sucked through an outer end of the air supply means in the outer part of the molded heel part, between the outer and the inner part of the molded heel part and through a correspondingly provided opening of the inner part of the molded heel part to the air pump device.

Furthermore, the present invention provides a shoe with the sole construction according to one of the preceding examples with air supply and air discharge device, wherein the shoe has a shaft for slipping a foot of a wearer of the shoe, wherein the shaft has a part close to the sole construction and one of Sole construction has remote part, and in which the air supply means so partially along the shaft, in particular by an inner lining of the shaft from the foot of the wearer of the shoe separated from the near part to the remote part extends that air (at least 5 ml, in particular at least 10 ml) can be pumped from the remote part into the air pumping device.

Thus, in principle, fresh air can be sucked in from the air pump device over a relatively large area. In particular, water ingress into the shoe from the outside is avoided if the end of the first air duct, through which air is drawn in from the outside, is higher from the outsole than the lowest shaft end of the shoe.

• Figur 1 eine Sohlenkonstruktion mit Luftpumpeinrichtung sowie Luftzufuhr und Luftabfuhr eines Schuhs mit einem oberen Sohlenteil und einem unteren Laufsohlenteil gemäß einem Beispiel der Erfindung darstellt;
• Figur 2 ein oberer Sohlenteil einer Sohlenkonstruktion mit Luftpumpeinrichtung sowie Luftzufuhr und Luftabfuhr eines Schuhs gemäß einem Beispiel der Erfindung darstellt;
• Figur 3 im Querschnitt Sohlenkonstruktionen mit Luftpumpeinrichtung sowie Luftzufuhr und Luftabfuhr eines Schuhs gemäß unterschiedlichen Beispielen der Erfindung darstellt;
• Figur 4 eine Luftpumpeinrichtung mit Schläuchen, die entlang ihrer Längsachse Öffnungen aufweisen, darstellt; und
• Figur 5 ein angespritztes Fersenteil zeigt, das einer Luftzufuhreinrichtung für ein Beispiel eines erfindungsgemäßen Schuhs zeigt.
• Figuren 6a bis 6d zeigen das Ermitteln eines Positionierungspunkts für eine Druckstempel in einem Verfahren zum Bestimmen eines ausgestoßenen Luftvolumens.

Further characteristics and advantages of the invention will become apparent from the detailed but non-limiting description of embodiments illustrated with the aid of the attached drawings, in which:

• FIG. 1 a sole construction with air pumping means and air supply and air removal of a shoe having an upper sole part and a lower sole part according to an example of the invention;
• FIG. 2 an upper sole portion of a sole construction with air pumping device and air supply and air discharge of a shoe according to an example of the invention;
• FIG. 3 in cross-section sole constructions with air pumping device and air supply and air discharge of a shoe according to different examples of the invention;
• FIG. 4 an air pumping device with hoses having openings along its longitudinal axis; and
• FIG. 5 shows a molded-on heel part, which shows an air supply device for an example of a shoe according to the invention.
• FIGS. 6a to 6d show determining a positioning point for a plunger in a method for determining an expelled air volume.

As it is in FIG. 1 In the example shown, the upper sole part 1 is made of more elastic (more compressible) material than the lower one Outsole part 2 is formed. In the heel area, an air pump device, for example in the form of a cavity (left illustration) or a plastic pump reservoir (right view), is formed. FIG. 2 illustrates the upper sole part 1 from below (from the viewpoint of the lower outsole part 2). For example, the upper sole part 1 may be made of relatively soft polyurethane, while the outsole part 2 may consist of abrasion-resistant rubber. When loading the heel area, the air pump device is compressed, whereby air from this out in the in FIG. 2 shown channels 4, which have the openings 3, is pressed. The compressed air through the openings 3 then serves to ventilate a shoe interior and thus the foot of a wearer a shoe comprising the sole construction with the upper sole part 1 and the lower sole part 2.

During the suction process of the air pump device (when relieving the heel area), according to the invention, at least 5 ml of air, in particular at least 10 ml of air, are drawn in from outside the shoe. During the ejection process of the air pump device (when loading the heel area), at least 5 ml of air, in particular at least 10 ml of air, are expelled from the air pump device according to the invention.

In the in FIG. 2 Below shown example of the upper sole part 1, a cavity 5 is provided in the heel area. This cavity can represent the air pumping device, which is arranged in the upper sole part 1 in this example according to the invention. Alternatively, a separate air pump device in the form of a plastic pump reservoir 10 may be provided in the cavity 5, as shown in FIG FIG. 1 right and the FIG. 2 shown above. At least the heel portion of the sole member 1 is sufficiently compressible so that it is pressed under load by the foot of a user, ie when he moves his weight on the heel area while walking, and so the volume of the cavity is reduced and air from the cavity or a plastic pump reservoir arranged therein is pressed into the channels 4. The air passes, for example, through a passage (in which a valve can be provided) in the intermediate region 6 and through the outlet 7 into the system of channels 4 (see FIG. FIG. 2 ).

According to one example, the air from the cavity 5 or a plastic pump reservoir arranged therein can be led into plastic tubes which are provided in the channels 4 and have openings provided corresponding to the openings 3 of the upper sole part 1. A through the in the intermediate region 6 recessed passage and guided through the outlet 7 air duct (air discharge) can connect the cavity or a plastic pump reservoir embedded therein with the channels 4. By means of one-way valves 11, the flow of air can be regulated. A one-way valve disposed in the air duct may be provided to ensure that air can only flow from the air pumping means to the ducts 4 and not vice versa (see also Figs description of FIG. 3 below). Also, a passage provided in the intermediate region 6 may comprise a single directional control valve for controlling the air sucked and discharged by the air pumping device.

In the in FIG. 2 In the example shown, another air guide 12 (air supply) is guided from the air pumping device through the passage 8 and the upper sole part 2 upwards in a shaft of a shoe comprising the sole construction with the upper sole part 1, by the fresh air with relieving of the heel area is sucked into the air pump device during the walking movement of a user. The passage 8 is connected by a passage within the intermediate region 8 to the cavity 5 or a plastic pump reservoir arranged therein. This further air duct may also be provided with a one-way valve, which guarantees that air gets into the air pump device when the heel area is relieved, but that no air can escape to the outside when the heel area is loaded by this additional air duct. As it is in the FIGS. 1 and 2 is shown, the air ducts can be connected by a connector 9 with the air pump device. The valves 11 may be arranged in the connecting piece 9.

The further upwardly guided ventilation guide 12 ends at the upper end in an air inlet element 13. This air inlet element 13 may be visible in particular on the shaft of the shoe and in the form of a logo, pattern, trademark or the like. be formed or the like.

In FIG. 3 two embodiments of the sole construction of the shoe according to the invention are shown by way of example in cross section. In the upper picture of FIG. 3 an upper sole portion 1 and a lower sole portion 2 form a sole construction. In the heel area a cavity is essentially formed by the upper sole part 1. The cavity is essentially completely filled by an air pump device in the form of a plastic pump reservoir 10. When loaded by the foot (heel) of a user, the air pump device is compressed and air via the one-way valve 11 in the in FIG. 2 illustrated Channels 4 pressed, from which it passes through the openings 3 in the shoe interior of a shoe, which is equipped with the sole construction.

In order to ensure this function of the plastic pump reservoir 10, the upper sole part 1 must be designed such that it yields (inwards) with respect to the pressure of the heel of a user's foot. The material can be selected according to the gender of a user. An elevation provided in the heel region of the lower outsole part 2 can also be pressed inwards when the heel area is loaded by the weight of the user, so that the pumping action is assisted. If the heel area is relieved during the walking movement, a negative pressure is created in the plastic pump reservoir 10, through which air is sucked from outside through the air guide 12 and the air inlet element 13 into the plastic pump reservoir 10. The one-way valve 10 prevents air from the inside of the shoe from being sucked into the plastic pump reservoir 10 through the channels.

In the lower picture of the FIG. 3 a similar construction as that of the upper figure is shown, in which case the plastic pump reservoir 10 is dispensed with. The air pump device is thus formed only by the cavity 5, which is pressed under load by the foot of a user, whereby air through the one-way valve 11 in the in FIG. 2 illustrated channels 4 is pressed, from which it passes through the openings 3 in the shoe interior of a shoe equipped with the sole construction.

Generally, it should be noted that in the in the FIG. 3 shown embodiments, both channels can be provided with hoses laid therein or channels without hoses. Likewise, a directional control valve may be provided with two one-way valves connected to the air pump device air supply lines.

While the two in FIG. 3 embodiments shown have an upper sole portion 1 and a lower outsole part 2 connected thereto, in both embodiments, the upper sole portion 1 and lower sole portion 2 may alternatively be formed integrally together. In such a one-piece sole construction then corresponds to the upper sole portion of the separately formed upper sole portion 1 and the lower sole portion of the lower sole portion 2 as in each case FIG. 3 shown.

In the FIG. 4 shown air pumping device is formed by a plastic pump reservoir 10, can be pumped from the air into the hoses 14. The hoses 14 have openings 15, the openings 3 in the channels 4 of the upper sole part 1 (as in the FIGS. 1 to 3 shown). In the in FIG. 4 As shown, a directional control valve 16 with two one-way valves is used to control the air flow. Depending on the pressure actuation of the air pump device by the foot of a user, this directional control valve 16 can regulate the air flow such that air is pumped into the air pump device only from the outside and only into the hoses 14. In the FIG. 4 In particular, the configuration shown in FIG FIG. 3 shown embodiment find use.

The air supply means of the shoe of the present invention may be provided, for example, by means of a molded-on heel piece 30 as shown in FIG FIG. 5 is illustrated. FIG. 5 shows an exemplary sole structure with a cavity. The cavity may serve as an air pumping device or receive a separately formed air pumping device. Air is sucked from the outside via an opening of the heel part 30. The suction of the air is controlled by a one-way valve 11 in this example. Another one-way valve regulates the expulsion of the air in the FIG. 2 The heel part comprises an air-permeable element as the extreme end of the entire air supply device, which comprises the one-way valve 11. It may be in the form of a pattern, logo, etc. Through this air-permeable element, air is sucked into the cavity or a separate air pump device provided therein during the walking movement of a user by relieving the heel area. Thus, a relatively large amount of air per step be sucked and provided for ventilation of the shoe interior.

Claims (16)

Shoe with
a sole construction having an upper sole part, a lower sole part and an air pumping device,
the air pumping device being formed either by a cavity substantially recessed in the upper sole portion or separately formed as an independent entity and completely or partially recessed in a cavity of the upper sole portion;
an air supply device which is connected to the air pump device,
an air discharge device, which is connected to the air pump device,
wherein the upper sole portion, the lower sole portion and the air pumping means are formed such that
through the relief of the sole construction during a walking movement of a user, air can be sucked into the air pump device through the air supply device from outside the shoe and above the upper sole part,
by the load on the sole construction during the walking movement of the user, air can be expelled through the air discharge device into the interior of the shoe and the air pump device can be compressed by a pump volume corresponding to the amount of ejectable air,
wherein the pumping volume is at least 5 ml, in particular at least 10 ml. Shoe according to claim 1, in which air ducts, in particular channels or a mesh fabric, are formed in the sole construction, which are connected to the air pump device. Shoe according to claim 2, wherein the air ducts are formed in the upper sole part. Shoe according to claim 2 or 3, in which the air ducts are channels and along the channels openings are provided such that air flowing through the channels is expelled through these openings into the interior of the shoe. Shoe according to one of the preceding claims, in which openings are provided in the upper sole part, through which the air can be expelled into the interior of the shoe. Shoe according to one of claims 2 to 5, comprising plastic hoses arranged in the air ducts, the plastic hoses having openings along their longitudinal axes. Shoe according to one of the preceding claims, wherein in the air supply means a valve is arranged, which is designed such that air is sucked into the air pumping device only in the direction from outside the shoe and above the upper sole part; and or
in the air discharge device, a valve is arranged, which is designed such that air from the air pumping device can be ejected into the interior of the shoe. Shoe according to one of claims 1 to 6, in which a directional control valve is provided such that in a first opening direction of the directional valve air from outside the shoe and above the upper sole part is sucked into the air pumping device and in a second opening direction of the directional control valve Air from the air pump means in the interior of the shoe is ejected. Shoe according to one of the preceding claims, in which the air pumping device is formed in a part of the upper sole part and at least this part is designed to be more elastic than the lower sole part. Shoe according to one of the preceding claims, in which the lower outsole part on the outer running surface in the region of the air pumping device has a raised region which is designed to be pressed against the upper sole part when the sole construction is loaded. Shoe according to one of the preceding claims, in which the upper sole part and the lower sole part are formed separately. Shoe according to one of claims 1 to 10, in which the upper sole part and the lower sole part together in one piece, in particular as an injection molded part, are formed. Shoe according to one of the preceding claims, in which the air pump device is formed by a cavity which is substantially embedded in the upper sole part and which is filled with an air-permeable elastic filling material. Shoe according to one of the preceding claims, in which the air pump device is provided in the heel region or in the joint area of the shoe. Shoe according to one of the preceding claims, in which the air supply is provided by means of a molded-on heel part. Shoe according to one of the preceding claims, further comprising a shaft for slipping a foot of a user of the shoe, wherein the Shaft has a part near the sole construction and a part remote from the sole construction, and in which the air supply means extends partially along the shank, in particular through an inner lining of the shank from the foot of the user of the shoe, from the near part to the distal part so that air from the remote part is sucked into the air pumping device.

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