EA042624B1 - ANTI-LOAD PANTS - Google Patents

Description

The present invention relates to acceleration protection trousers, or, in other words, G-protection trousers, instead of the traditional one-piece g-suit for the crew of a high performance aircraft.

Significant G-forces can be generated during turns during flight. For the pilot's body, with positive g-forces along the vertical axis, this means that the blood from the upper parts of the body is shifted downward. Accordingly, the heart has to work harder to provide an adequate supply of blood and therefore oxygen to the brain and eyes. However, if - differently for each individual case - the limits of what is possible are exceeded, the lack of oxygen can lead to impaired visual perception (tunnel vision, the appearance of a gray veil) or even complete loss of consciousness (temporary blindness) (caused by overload loss of consciousness - G- LOC) and thus abort and/or crash. Significant G-forces arise, for example, in flight competitions, aerobatics and the specifics of military flights (air combat, interception maneuvers after the use of combat weapons, etc.). To a certain extent, the aircraft crew can suppress or delay the negative effects of large Gs. In addition to appropriate training, this can be achieved, for example, through oriented muscle tension or high pressure breathing. These measures are supported by technical solutions such as reclining seats, pressurized ventilation using oxygen-enriched air and g-suits, or a combination of these options. However, in the long run, disadvantages such as limitations in functioning, ability to function, and rapid full output cannot be completely eliminated.

Numerous variants of anti-g suits are known. There are models that are exposed to air as a pressurized fluid, i.e. so-called pneumatic anti-g suits, and models that work according to the hydrostatic principle and also allow hydrostatic pressure to act directly on the wearer of the protective suit, or such suits that are equipped with fluid channels that pass, for the most part, along a local and simultaneous vertical axis and increase the internal pressure corresponding to the liquid column by reducing the circumference of the circumference of the limbs with a protective suit. Both such models are simply referred to as hydrostatic G-suits, although the concept of fluid is by no means limited to water. Known anti-g suits are described, for example, in EP 1755948, this source of information is probably the closest analogue of the prior art, as well as in US patents 2007/0289050, JP 2008012958 and DE 102007053236. In addition, an anti-g suit is known from WO 2012/066114 A1.

In such anti-g suits, the areas and/or parts of the body to be protected are usually surrounded by the anti-g suit or parts thereof. Parts and areas of the body that are particularly stressed by frequent extreme accelerations are subjected to pressure generated inside such anti-g suits by means of compressed air or pressurized gas bladders or hoses, depending on the g-forces along the current and local vertical axis, called the zero Gz , which is counteracted by the pilot's hemostatic pressure. This is the general task of such anti-g suits.

The effort required to achieve sufficient G protection with traditional suits is still significant and the aim of the present invention is to reduce this effort, mainly due to the fact that sufficient G protection is achieved with G pants alone instead of a whole suit. These protective g-trousers should provide sufficient g-force protection for applications that represent about a third of the entire relevant market. The entire market is taken into account, i.e. not only a market for high performance military aircraft solutions, but also for less demanding applications such as jet trainers and, more generally, aircraft where similar loads. These anti-acceleration or anti-g pants must be effective under all circumstances and in all conditions without requiring any special behavior on the part of the pilot, which is necessary when using traditional anti-g suits, especially in limited range.

Traditional anti-g suits are relatively heavy and rigid, and the person in such a suit soon becomes covered in sweat, which negatively affects his natural tolerance for g-forces and well-being. Some anti-g suits can cause pain in the arms and legs of the wearer, and there are general medical doubts about the high-pressure breathing (PBG) they cause. The anti-g trousers must therefore provide absolutely reliable protection against overload, i.e. to prevent the so-called G-LOC phenomenon - syncope during overloads, and to ensure that this protection against overloads is achieved with the application of as little effort as possible, without the need for overpressure breathing if possible. Anti-G

- 1 042624 trousers must function without any influence from the wearer, in other words, without pressure breathing, in other words, without muscle tension for increased overload tolerance (AGSM), so that they can provide their optimal effect in all situations and the highest possible wearing comfort, and be almost as comfortable to wear as underwear. They are designed to prevent the pilot from feeling prematurely tired and to reliably prevent pain. In addition, these anti-g trousers should also provide assistance with the ability to stay afloat when submerged in water. Alternatively, anti-g pants should include an active cooling device. It must be possible to manufacture these anti-g trousers as standard trousers. Tailoring such anti-g trousers for individual wearers, as was previously necessary for most suits, should no longer be necessary.

Since the contact pressure at the moment is created by the shell of the anti-g suit on the body of the person in this suit, depending on the part of the body that must be protected, the sizes of the bubbles that cause these contact pressures are different. As can be seen from the prior art documents, the bubble volumes are relatively large, up to almost complete coverage of the lower body, which, combined with the compressibility of the air and given the high initial zero rates, results in a slow response of the G-suit supply tubes.

The object of the present invention, in view of the above facts, is to provide an acceleration protection trousers or anti-g trousers by which the internal pressure can be controlled according to the relative size of the body to be protected and according to local and momentary acceleration, and, however, the volumes to be filled for this purpose should remain small. Anti-g pants should also be comfortable to wear, without requiring a precise fit. They should be easy to put on and take off, comparable to putting on regular jeans, with no need for overpressure breathing, as in the case of an anti-g suit. In addition, in possible variants of the product, additional functions, such as air conditioning, should be provided. Another purpose of these anti-g pants is to facilitate the process of venous return of blood in the legs of the pilot by changing the internal pressure created in a rhythmic manner. These g-trousers should also not change the position of the pilot's hand on the thigh when inflated under g-force conditions, since there are no pressure bubbles on the thigh. European Eurofighter fighters, F/A-18s, and other aircraft have a central control stick, and pilots often place their control hand on their hips for extended support or to facilitate regular flight during long turns. And finally, it must be possible to wear these anti-g trousers over a flight suit, and even put them on over shoes already worn by the pilot. For this purpose, they must be specially designed so that they can be put on without effort, easily and quickly, and taken off again with the pilot's suit and shoes already on, i.e. it should be possible to pull the trousers over the legs with the shoes already on so that they can be put on and taken off.

The solution of the problem under consideration is achieved by means of trousers that protect against acceleration, or anti-g trousers, for pilots of aircraft in which significant overloads take place, while at least parts of the anti-g trousers are made with double walls, thus forming airtight compartments inside or outside, which may be exposed to acceleration-dependent air pressures, which are characterized in that the anti-g trousers consist entirely of breathable, tear-resistant, flame-retardant and low-stretch synthetic fabric, while the anti-g trousers are partially provided with compartments that can be inflated through an external hose with a coupling for connection to a compressed air source with automatic dosing, and which can be inflated to give them a roughly circular cross-section, so that these compartments act like muscles, since their two opposite edges can be pulled together, and the adjacent tissue, so Thus, they can be stretched, and, at the same time, these compartments extend continuously along the inner and outer surfaces of the legs and are connected at the upper end of the legs by an inguinal canal passing along the lower part of the inguinal region, and the compartments on the outer surfaces of the legs extend further upward from the inguinal region and to the lower abdomen into the sac-shaped pneumochamber, while they communicate with each other through the connecting channel on the back of the trousers, in the lumbar region of the wearer of the trousers, while from here the coccygeal canal branches down and passes between the buttocks of the wearer of the trousers in the direction of the groin, moreover, the compartments are connected by means of at least one hose fitted with a coupling to a source of compressed air with automatic dosing.

Particularly advantageous embodiments of these anti-g trousers are claimed in the dependent claims in a more precise form.

These anti-g trousers and the basic idea of the invention are explained in more detail with the help of the drawings.

- 2 042624

They show the following.

Fig. 1. 5-chamber anti-g pants, in accordance with the prior art.

Fig. 2. 5-chamber geometry of anti-g trousers, in accordance with FIG. 1.

Fig. 3. Anti-g pants with full coverage by inflation, according to the state of the art.

Fig. 4. Geometry of a fully covered chamber of anti-g pants, in accordance with FIG. 3.

Fig. 5. Anti-g pants, in accordance with the invention, turned inside out, on a virtual body, with pneumatic muscles along the inner and outer surface of the legs, as well as a divided pneumatic abdominal chamber.

Fig. 6. The geometry of the compartments or pneumatic muscles of anti-g trousers, in accordance with FIG. 5, which can be inflated with compressed air and built into anti-g pants, in a state when they are laid out separately on a flat surface.

Fig. 7. Same as in FIG. 6, but with arrows showing how the outer compartments here and in FIG. 6 turned inward to form internal compartments along the inner surface of the rods.

Fig. 8. The geometry and position of the compartments or pneumatic muscles of anti-g trousers, in accordance with FIG. 5, in a spatial position inside the anti-g trousers after eversion, in accordance with FIG. 7 for wearing anti-g pants, but here the anti-g pants are shown with the wrong side turned out.

Fig. 9. The compartment acting as a pneumatic muscle, the inner surface of which is covered with a highly elastic, airtight and extensible layer, is shown in a flat state, in cross section.

Fig. 10. The compartment acting as a pneumatic muscle, the inner surface of which is lined with a highly elastic, airtight and extensible layer, is shown in cross section in a partially inflated and compressed state.

Fig. 11. The compartment acting as a pneumatic muscle, the inner surface of which is lined with a highly elastic, airtight and stretchable layer, is shown in a fully inflated and fully compressed state with an approximately circular cross section.

Fig. 12. Anti-g pants with the wrong side turned out in the passive state, in front view, with two legs slightly bent at the knees, turned outward.

Fig. 13. Anti-g trousers with inside out turned out, seen from the rear, in the state with partially inflated compartments.

Fig. 14. Anti-overload trousers with the wrong side turned outward in a relaxed state, in the right view, lying on the floor, with knee sections of two legs located at different angles.

Fig. 15. Anti-g pants with the wrong side turned out in the stretched state, with inflated compartments, in front view.

Fig. 16. Anti-g trousers with the wrong side turned out in the stretched state, with inflated compartments, in the left view.

Fig. 17. Anti-g pants with the wrong side turned out in the stretched state, with inflated compartments, on the right side.

Fig. 18. Another embodiment of these reverse side anti-g pants, in a passive state, depicted on a virtual body to show the position of its internal components, in a front view, slightly tilted.

Fig. 19. This embodiment of the inside-out anti-g pants, in the passive state, depicted on a virtual body to show the position of its internal components, in the left side view.

Fig. 20. This version of the anti-g pants in the passive state, now with the front side on the outside, shown on the virtual body, in the rear view.

Fig. 21. This embodiment of anti-g pants, in accordance with FIG. 20, in the passive state, is shown on the virtual body, in right and angled rear view.

Fig. 22. Another version of anti-g trousers after pulling on, with open zippers on the front of the legs, in front view.

Fig. 23. Anti-g trousers, in accordance with figure 22, with open zippers on the front of the legs, as seen from behind.

Fig. 24. Anti-g pants, in accordance with FIG. 22 and 23, with the left leg zipper closed and the right leg zipper fully open, as seen from the front.

Fig. 25. Anti-g trousers, in accordance with FIG. 22 and 23, with a partially open zipper on the right leg and a fully open zipper on the left leg, as seen from the front.

Fig. 26. Anti-g pants, in accordance with FIG. 22 and 23, after being worn, with the zippers on the front sides of the two legs fully open, as seen from the front.

Fig. 27. Anti-g trousers, in accordance with FIG. 22 and 23, in their state of wearing, with

- 3 042624 closed zippers on the front of the legs, as seen from the front.

Fig. 28. Anti-g pants, in accordance with FIG. 22 to 27, stretched, on the right side.

Fig. 29. Anti-g pants, in accordance with FIG. 22 to 28, worn, seen from the left.

Fig. 30. Anti-g trousers, in accordance with FIG. 22 to 29, lying on the floor, with open zippers on the front of the legs, in front view.

Fig. 31. Anti-g trousers, in accordance with FIG. 22 to 30, lying on the floor, with open zippers on the front of the legs, as seen from behind.

Fig. 32. Anti-g pants, in accordance with FIG. 22 to 31, worn over the flight suit, and especially over the pilot's shoes, with an open zipper on the right leg.

Fig. 33. Anti-g pants, in accordance with FIG. from 22 to 32, worn over a flight suit, and especially over pilot's shoes, with closed zippers on the legs.

Fig. 34. A pilot with these anti-g trousers worn over his suit and boots, so that the loose legs of the anti-g trousers end at the bottom of the shoe, like trousers with the wrong length.

For a better understanding of the invention, prior art anti-g pants systems are first briefly presented and described. To this end, in FIG. 1 shows what is known as a 5-chamber g-pants presented in a taut state. They were invented in the late 1940s and are still the most widely produced and used overload protection system. It is known that such anti-g trousers increase the protection of the pilot against overloads by an average of 1.0 G. They are worn over the overalls of 23 pilots, while several pneumatic chambers are built into the trousers - five in total. Notches 40 are provided in the area around the groin and in the anterior portion of the knees to increase freedom of movement in the sitting position. The pneumatic chambers are all connected to each other and, if necessary, they are inflated with a hose from a source of compressed air. In this case, the inflated areas are pressed directly on the surface of the pilot's body, and blood stasis forms at the edges of the recesses 40, as happens when a doctor uses a blood pressure cuff, and this blood stasis can lead to circulatory disorders, to an increase in blood pressure and to an increase in heart rate.

In FIG. 2 shows separately the pneumatic chamber system of these anti-g trousers with its five pneumatic chambers 26 communicating with each other. Compressed air is supplied to various bubbles of pneumatic chambers 26 through a hose 27. Inside the anti-g trousers, each pneumatic chamber 26 covers the front surface of the thigh and the front surface of the lower leg. In addition, the fifth pneumatic chamber 26 acts on the lower abdomen. When this chamber system is pressurized, the chambers 26 inflate according to their geometry and pressurize the torso of the person wearing the trousers to counteract the hemostatic pressure of the pilot. The high bubble volumes of the air chambers 26, which primarily render the system relatively slow-acting, with a corresponding long response time, have an adverse effect. In addition, these airtight bladders 26 cover relatively large areas of the body of the wearer and prevent sweating. Thus, such anti-g pants are a real grip, that is, they contribute to the build-up of heat in the legs and, accordingly, the comfort when wearing them leaves much to be desired. Unlike the new anti-g pants according to this application, this type of anti-g pants must be worn close-fitting to ensure that any anti-g performance is obtained, which greatly limits freedom of movement and reduces comfort.

In FIG. 3 shows the next example of the prior art, which appeared around 1980, namely anti-g trousers with full coverage. In these trousers, which are shown lying loose on the floor in front view, the airbags extend over much larger areas of the wearer's body, as will be shown below. These traditional g-trousers are made of relatively thick and non-breathable textile material, in accordance with ISO 9237 from 20 to 90 l/m ² x s, preferably Nomex flame retardant aramid fiber, as an outer shell in which the pneumatic chamber is placed. The pneumatic chamber system is made of reinforced and non-stretch nylon with a polyurethane coating. The outer shell is provided with zippers for the waist and calves, with for example six adjustable drawstring laces and two easily removable zip pockets 28 for opening and closing. These pockets 28 with viewing windows 29 are located on the front of the thighs for placing and viewing documents. Again, unlike the new anti-g pants of this application, this model of anti-g pants shown in FIG. 3 must be worn tight to ensure effective anti-g performance, which greatly limits freedom of movement and reduces pilot comfort, while taking much longer to put on. It also does not put pressure on the buttocks, and its large abdominal pressure chamber is pushed / pressed sharply and very uncomfortable into the stomach area. These trousers increase the pilot's G-force protection by an average of 1.5 G.

- 4 042624

In FIG. 4 is a separate view of the bladder system of these full coverage anti-g trousers shown in FIG. 3. The pneumatic chamber 30 extends over almost the entire surface of the legs, covering each of the two legs from the outside completely, with the exception of the gap 31 along the inside of the legs - hence the name anti-g trousers with full coverage. In the upper part, the pneumatic chamber 30 is extended to the lower back and lower abdomen 32, covering all of this up to the lateral hip region. This pneumatic chamber 30 is supplied with compressed air from a hose 33 located on the side. In this case, too, covering large portions of the legs and lower abdomen is unfavorable for dissipating the heat generated by the body. Multiple parts of the body are covered by these airtight pants, whereby they work like real sweat pants because when you fly, you sit on your buttocks, and thus the heat cannot escape from the body and dissipate. Such anti-g pants with full coverage proved to be uncomfortable to wear. The large volume of the one-piece pneumatic chamber 30 results in system inertia, in other words, the reaction time for pressurizing and depressurizing is again relatively long.

Anti-G pants according to the invention are shown in FIG. 5 with the wrong side turned out, and, unlike the previously known anti-g trousers, these protective trousers are, in general and mandatory, made of a unique material specially developed for these anti-g trousers, which ensures high breathability, according to DIN EN ISO 9237 , up to 500 l/m ² x s min. This material is also characterized by an extremely high tensile strength, according to ISO 13934-1, up to 2000 N/5 cm. This ISO 13934-1 standard establishes a methodology for determining the maximum force and elongation of textile webs using a test strip clamped in a vise . This technique is mainly applicable to textile webs, including fabrics, having elongation properties obtained primarily due to the presence of elastomeric fibers in the fabric, and, in addition, also due to mechanical or chemical processing of the fabric. However, it can also be applied to fabrics made using other technologies, but not to geotextiles, nonwovens, surface-coated materials, glass fabrics, and fabrics made from carbon fibers or polyolefin film filaments. This procedure specifies the determination of the maximum force and elongation at maximum force of test specimens in equilibrium with a standard test atmosphere, and of test specimens when wet. This procedure is limited to the use of CRE (Constant Pull Rate) testing machines.

These anti-g pants, as shown in FIG. 5 provide extremely high load-bearing capacity with very little elongation while having a weight per unit area of only 121 ± 5 g/m ² . The material of these anti-g pants allows them to be worn in direct contact with the skin, which also eliminates the compressibility of otherwise required classic underwear. For reasons of hygiene, however, anti-g trousers can optionally be worn with specially adapted, flame-retardant, thinnest and most breathable textile underwear. These anti-g pants are exceptionally comfortable to wear, they feel like very fine natural cotton and are reminiscent of pajamas. The fabric of these anti-g pants is made from blends of flame retardant, fully synthetic, anti-static, highly practical and low stretch yarns, including aramid fibers, which are processed into a breathable fabric. The front and back of the legs are exclusively textile strips 14. They are breathable and allow the heat from the body to dissipate.

As a characteristic feature, these anti-g pants are not based on a traditional pneumatic chamber system, rather, they contain a pneumatic muscular system made of compartments with a small and divided abdominal pneumatic chamber 13. Such outer compartments 34 extend along the outer sides of the two legs from the waist line to the bottom hems of 9 trousers. The inner compartments 35 of this type of model run along the inner sides of the legs from the crotch down to the lower edge 9 of the trousers. These outer 34 and inner 35 compartments are connected to each other along the lower edge of the strip 11 through a corresponding strip-like channel 18. Front and back between the outer 34 and inner compartments 35, i.e. at the front and back of the trousers, breathable textile strips 14, 15 (also shown in Fig. 14) are installed, which are located directly on the front and back surfaces of the legs of the person wearing the trousers. The outer compartments 34 extend above the legs over the region of the lower abdomen, each forming a bag-like pocket for forming the bladder 13 so that the two bladders 13 thus formed cover the entire region of the lower abdomen. On the rear side, the two outer compartments 34 are connected by a channel, as will be clear from the following drawings. These compartments, acting as pneumatically compressible muscles, are pressurized for the entire lower body region, including, if necessary, the legs, while these compartments 34, 35, 18, 13 cover a relatively small area, but can apply pressure to the entire lower region. body. The purpose of these pneumatically contracting muscles is not directly

- 5 042624 pressure in the inflated areas on the adjacent area of the body, but rather not directly, but by stretching the adjacent areas of breathable tissue around the body. They immediately tighten, if necessary, the fabric bands 14, 15, which are free of bubbles, and tighten the areas of the body or limb surrounded by them, while pressure is applied to the body. After exhaustive testing on a centrifuge, it turned out that these anti-g trousers provide pilots with g-force protection in the amount of 3.5 to 3.8 G, i.e. 2 to 3 times more protection than all other anti-g pants on the market. These g-trousers have an exceptionally low overall weight, which is about a third less than traditional g-trousers. This makes it easy to put on, like putting on jeans, unlike conventional anti-g pants, which are difficult to put on.

The built-in compartments 34, 35, 18, 13, respectively, act as pneumatically functioning contraction muscles, not just bubbles that are designed to be pressed directly against the surface of the body. These compartments are embedded in the textile material, for example, sewn or glued or welded, by double folding with a strip of textile material inside or outside the textile material of the anti-g trousers, so that the strip is connected to the textile material only at its edge. These compartments are made of the same low stretch material as the rest of the textile material. In the first embodiment, flexible, extensible hoses made of elastomer are inserted into these compartments and expand when pressure is applied. These inflated tubes are then laid against the inner surface of the compartments and inflate them to form a circular cross section. As a result, the two side edges of the originally flat compartments move towards each other, ie they are compressed, and thus they tighten the textile areas adjacent to the compartments from the outside. In another embodiment, the compartments are internally lined with a resilient rubber, airtight material to achieve a tight seal. When air is pumped into the compartments, the compartments instantly deform into a circular cross-section and, by contraction, pull together the textile portions lying on the outer surface, which consequently surround the body parts to be covered and pressurize the body surface.

In FIG. 6 shows the geometry of the compartments, or these pneumatically compressible muscles of the anti-g pants of FIG. 5, which can be inflated with compressed air and built into anti-g trousers, in a state when they are deployed on a plane. Compartments 34 are designed for the outer side of the two legs. The compartments 35 drawn on the outside in the figure, on the other hand, are for the two inside sides of the legs, and they are turned inside out for installation as shown in FIG. 7 curvilinear arrows. In the upper part, the inside leg compartments 35 are in communication with the outside leg compartments 34 by a corresponding channel 18. The outside leg compartments 34 extend from the hip area further up to the waistband. Each of them fits into a pocket in the form of a bag, which acts as a pneumatic chamber 13 on the front side of the trousers, while two pneumatic chambers 13 jointly cover the entire area of the lower abdomen. The outer compartments 34 communicate with each other through a channel 17 with the region located behind, in the lumbar region 16 of the wearer. The coccygeal duct 5 branches off from this duct 17 in a downward direction and then passes below between the buttocks of the person wearing anti-g trousers. This coccygeal canal 5 is 2 cm to 6 cm wide and extends downward to put pressure on the buttocks, but without the dangerous air cushion effect in the event of an ejection seat.

In FIG. 8 this fan geometry is depicted spatially, on anti-g trousers, with compartments 35 for the insides of the legs, based on the image shown in FIG. 6 and in FIG. 7, but these compartments 35 are reversed here. The compartments 34 for the outer sides of the legs extend from the outside along the outer sides of the legs, while the compartments 35, passing along the inner surface of the legs, are connected to the outer compartments 34 by means of channels 18, providing communication between them. All areas between the outer 34 and inner compartments 35 remain unequivocally free of an airtight covering or are connected by a textile material with good air permeability. In the area of the lower abdomen, starting from the position in Fig. 6 and in FIG. 7, bag-like pockets can be seen tucked inwards serving as bladders 13. The connecting canal 17 and the coccygeal canal 5 extending downward from it can be seen in the lumbar region.

All such pneumatic trouser muscles are provided only on the lateral outer and inner surfaces of the two legs so that the front and back surfaces of the legs remain free from compartments, while the textile materials lie directly on the legs in the form of textile strips 14, 15, and in these areas a high degree of breathability is provided to allow sweat vapor to escape to the outside. Thus, inflation on the upper thighs in the sitting position is effectively prevented. The pilot can place his hand on his thigh regardless of the G-force and pressure applied to the anti-g pants, while the hand remains at rest during changes in load. In particular, it facilitates continuous turns.

In FIG. 9 shows a cross-section of such a textile compartment serving as a pneumatically actuated, compressible muscle. On one side, which can be the outer

- 6 042624 or the inner surface of the base material 4 of the trousers, a textile strip 7 is applied. The inner surface of the compartment thus formed, in the example shown in FIG. 9 is completely covered with an elastic rubber airtight layer 2. At two corners 6 of the compartment 1, the airtight covers 2 are hermetically connected to each other. If air is pumped into the cavity of this compartment 1, it swells because the air cannot escape, and the cross section of the compartment eventually becomes round. The edges are pulled together. It is clear that the textile strips 14, 15 adjacent to the two sides of the compartment - here to the left and right of the compartment - are pulled together in this case, as indicated by the arrows in FIG. 10, outside left and right. In FIG. 10 compartment 1 is shown in a partially inflated state. This inflation may continue until the cross section of compartment 1 is approximately circular, as shown in FIG. 11. As a design option, a dry air cooling system can also be provided: in this case, the compressed air that is supplied through the laminated ventilation lines 21 exits through the lip-shaped holes 19 on the surface of the body of the person wearing the trousers, providing him with a cooling effect.

The airtight linings or the air hoses inserted into them are made of elastomer, so they are flexible and stretchable. As shown in FIG. 9 to 11, they are covered on both sides with less extensible textile coverings and form compartments 1 of anti-g trousers. If pressure is created in the air hoses or in the cavity formed by the coatings 2 in compartments 1 when compressed air is supplied, they stretch the adjacent areas of the textile and, thus, create circumferential tension σ, which creates pressure p inside the body tissues in accordance with the dependence σ = p*g

Thus, inversely proportional to the local curvature r of the body part, where σ is the circumferential tension in the textile material;

p - pressure in body tissues;

r - local curvature of the body part;

N is the magnitude of the force in newtons;

m - meter.

Instead of equipping the compartments 1 with an air-tight rubber elastic cover 2 on the inside, as an alternative, an expandable rubber elastic tube can also be freely installed in the cavity of the compartment 1. When air is pumped into it, it expands and eventually completely fills the cavity of the compartment 1, and, with sufficient internal pressure, this hose can inflate the compartment to a roughly circular cross-section. The two edges of the compartment are respectively compressed and the adjoining airtight textile strips 14, 15 are pulled together.

In FIG. 12 shows these anti-g trousers, turned inside out, lying on the floor in non-working condition, in front view, with two legs slightly bent outward at the knee. As on the outer surface of the legs, the compartments 35 also run along their inner surface from the groin area 10 along the legs down to the lower edges of the trousers 9. area to the outside of 12 trousers, to the hip area. From here further compartments extend into the front area of the trousers below the belt 8, each of them has the form of a bag-like pocket, serving as a bubble 13, with a horizontal arrangement along the belt 8 to the middle of the waist of the person wearing the trousers.

In FIG. 13 shows the anti-g pants turned inside out, in a state with compartments 34, 35 slightly inflated, as seen from behind. As seen in FIG. 13, belt loops 3 can be made on the belt 8. Here they are on the inside, because in this illustration the underside of the trousers is turned out. The drawer pockets 34 in these anti-g pants shown here extend from the area near the waistband 8 of the pants down the two outer sides of the pants, along the outer surface of the legs down to the bottom edges 9. From the waistband area 8, on both sides of the pants, the compartments 34 extend horizontally. on the back of the trousers, which is visible here, to the lumbar region 16, in particular covering the outer halves 25 of the buttocks. From the middle of the back section of the belt, the compartment in the form of the coccygeal canal 5 extends down, with a width of 2 cm to 6 cm, to the height of the crotch of the person wearing these trousers. If air pressure acts on the pneumatically communicated compartments 5, 17, 34, 35, they all expand and contract in width. As a consequence, they shorten the distances between the two fan edges and thereby tighten the adjacent breathable textile portions 15, which results in enveloping the covered body parts with more or less tensile stress. Since the textile for these trousers is an extremely low-stretch textile material, in terms of how it stretches

- 7 042624 stretching of the fiber and stretching of the binder, this stretching tension and tight coverage of parts of the body, especially the thighs and legs, but also the entire groin area and especially the buttocks, are very effective and work immediately. At the same time, this single-layer textile material lying directly on the body is exceptionally breathable and. hence breathable. It is this property that ensures that a person in these trousers can sweat, and his sweat can, evaporating, go out through the flat textile strips 14, 15 located on the body.

The textile sections 15 between the outer 34 and inner 35 compartments on the back of the legs are made of the same thin and breathable fabric and are used for a comfortable sitting position. Due to their single layer, they provide the most direct and therefore natural contact possible with the seat surface in the cockpit. The wearing comfort is accordingly significantly and incomparably improved when compared to traditional airtight or nearly airtight fabrics. In the unfilled or flat state of the compartments, their maximum width is a few centimeters.

In FIG. 14 shows these anti-g trousers turned inside out, in a passive state, in the right view, the trousers lie on the floor, while the left leg is shown slightly forward. The inner compartment 35 is here viewed on the left leg, and the outer compartment 34 on the right leg. Textile fragments 14, 15, located between the compartments 34, 35 of the leg, are made of a thin and breathable material. On the front side of the legs they are here indicated by the position 14, and on the back side - by the position 15. Here, these fragments 14, 15, among other things, ensure, firstly, the increase in tension created by the compartments 34, 35, thanks to good air permeability and, accordingly, , the ability of this textile material to breathe, because it is elastic, and, secondly, and very importantly, the sweat coming from the person wearing the trousers to the material can evaporate and come out. Because these anti-G pants are also made from exceptionally lightweight textiles, they provide a level of comfort not previously known with anti-G suits. On the front side of the anti-g trousers, the right side of two bag-shaped pneumatic chambers 13 are visible, which pass in front of the stomach region of the person wearing these trousers.

In FIG. 15 these anti-g trousers are shown with the wrong side turned out, in a state of tension, in other words, with inflated compartments, in a front view. That's why the 3 belt loops are on the inside here. The compartments 34 running along the outside of the legs are now inflated, as are the compartments 35 running along the inside of the legs. The inner compartments 35 at the top open into the inguinal canals 18 which run along the lower edge of the inguinal region, in other words obliquely outward and upward, and lead to the lateral regions, up to the location next to the belt 8. From the lateral regions in the hip region, saccular the pocket departs on each side of the anti-g trousers with the formation of a pneumatic chamber 13 to the middle of the abdominal region. In this picture, the textile strips 14 on the front side of the trousers are visible, made of thin and breathable fabric, thus, this low stretch and very breathable fabric is located directly on the bare leg of the person wearing these trousers. Perspiration from a person can pass through these front and back sides of the legs, which means that perspiration can effectively pass through the textile strips 14, 15, which greatly increases the comfort of wearing these anti-g trousers.

In FIG. 16 shows anti-g trousers, turned inside out, in a passive state, with empty compartments 13, 18, 25, 34, 35, in the view of the trousers from the left side. In this view, we are looking at the outer compartments 34 on the left outer side of the left leg. In the area of the knee, compartment 34 is cut in such a way that a recess 20 is formed which allows the knee to be bent at an angle to assume a seated position in the cockpit seat without being accompanied by tension. In all other respects, compartment 34 is extended to the thigh, as well as to the lower leg of the person wearing these trousers.

In FIG. 17 shows anti-g trousers turned inside out, in a partially stretched state with compartments 13, 18, 34 not fully inflated, which are visible on the right side, with the knee sections of both legs bent differently. Here you can clearly see the clearly visible compartment 34 on the right side of the trousers, in other words, on the right leg and right thigh. Saccular pneumatic chamber 13 is visible on the front side of the lumbar region, it passes below the belt 8 along it and meets in the middle with the pneumatic chamber 13, located symmetrically opposite the pneumatic chamber.

In FIG. 18, these anti-g trousers, turned inside out, are shown in a passive state, worn on a virtual body, which is indicated by dotted lines, in a front view slightly turned to show the position of the individual components inside the trousers. The outer compartments 34 are visible along the outer sides of the legs and the inner compartments 35 along the inner sides of the legs. Between them, thin and breathable textile fragments 14 are provided to maintain the tensile stress in the inflated state of the compartments 34, 35, and to allow perspiration to escape. At the top, the 18 inguinal canals join the internal

- 8 042624 to them compartments 35, and then behind them - to two bag-shaped pneumatic chambers 13 to create pressure in the inguinal region and lower abdomen in the inflated state. Anti-overload trousers end in the upper part with a belt 8. Two zippers 36, 38 pass from the groin to the belt 8. The zipper 36 is the main one, and the second zipper 38 is opened only in case of a large weight of the person wearing these trousers, so that you can was to increase or expand the trousers in the waist area. These anti-g pants are designed and sewn with a similar fit to motorcycle leather suit pants, i.e. with trousers for bent legs. Ultimately, this results in a much more comfortable sitting position when subjected to high pressure.

In FIG. 19 shows an embodiment of an inside-out anti-g pants in non-operating condition shown on a virtual body shown in dotted lines in a left view to show the position of the internal components. The outer compartment 34 is visible on the outside of the left leg, followed by a thin and breathable compartment that joins it at the front textile piece 14, just as a thin and breathable textile piece 15 joins the compartment 34 at the back. The supply hose 22 with the compressed air coupling 24 is visible, facing outwards. The source of compressed air is already available in aircraft where flights are made in anti-g suits. It allows the inlet and outlet of compressed air to be finely adjusted and automatically controlled and can continue to be used with these anti-g trousers without any problem.

In FIG. 20 shows the anti-g pants in an unstressed state, now with the front side out and pulled over the pilot, in a rear view, showing the position of the internal components. Here you can see thin and breathable textile inserts 15 on the back of the legs and sections of two compartments 25 that cover the outer halves of the pilot's buttocks. Zippers 41 are provided on the legs in the lower leg area. The same is shown in FIG. 21 in a rear view with a slight turn. Beneath the belt 8, two gluteal compartments 25 are visible below, following the outer compartments 34, while the gluteal compartments 25 cover approximately the outer halves of the pilot's buttocks. Figures 19 through 21 show the anti-g pants in this form, when they are worn tucked into boots and worn under a flight suit.

One of the specific challenges these anti-G pants address is not to tailor-make such a piece of clothing for every pilot, but to make do with one model of anti-G pants for a wide range of users. The presented creation of pressure by means of these special pneumatic chambers acting like muscles also serves this purpose.

The main compressed air valve is also a safety valve. It immediately closes the compartments from the outside as soon as, for any reason, there is a sharp drop in pressure in the cockpit, or in the event of a pressure failure from the aircraft.

At this point, anti-G pants work like a high-altitude suit and keep pressure conditions stable within non-critical limits. Over these anti-g pants, in accordance with this invention, can be worn traditional, approved pilot's suit (suit), if necessary, with additional features to protect against exposure to radioactive contamination, biological and chemical warfare agents and/or cold water. The anti-G pants can also be equipped with a Dry Air Cooling System for even more comfort in extremely hot climates.

Thanks to the exclusive, very low stretch textile material, which is also very breathable and breathable, the amount of air required to build up pressure with these anti-g pants can be significantly reduced, and accordingly pressure builds up and down much faster than with any other anti-g trousers. First of all, these anti-g pants are just as easy to put on as regular jeans. Although it is not necessary to tightly adapt to a particular body type, these anti-g pants can provide effective g-protection for clothing up to two sizes larger. No lacing required for a snug fit. While no lacing, straps or buckles are needed for a custom fit, no pressure relief is required and there is no loss of time building up pressure that would occur if the laces and straps were tightened to adapt. to size.

These anti-g pants can also exert pressure on the buttocks without the common air cushion effect due to the tension around the buttock area created by the pneumatic muscles. This g-force protection is achieved when compared to the protection provided by conventional full-coverage, full-fit anti-g trousers that operate with a full-body blister fit but no buttock fit. Also unique is the fact that these anti-g pants can be worn with the legs tucked into the shoes, as shown in figures 20 and 21. This means that the pain in the feet is effectively eliminated during g-forces. Between compartments 5, 13, 17, 18, 25, 34, 35 and the outer surface of the anti-g trousers, a check valve can be installed, which, in the event of a sudden drop in pressure in the aircraft and / or in the atmosphere of the cockpit, closes and, thus , maintains pressure in the compartments. Another built-in valve can be activated by immersion in water through a moisture sensor, so that the compartments can hold their air content and, accordingly, provide buoyancy.

A particularly interesting variant of these anti-g trousers is shown in Figures 22 to 34. In this example, as shown in FIG. 22, anti-g trousers are worn directly on the body, never before possible, and for this purpose only specially adapted, fire-resistant, thinnest and breathable textile underwear is used. In the thigh area on the legs there are pockets 28 with viewing windows 29 and lower flaps 42, which can be closed with a zipper or Velcro, they are attached along their outer and upper sides with the help of zippers or Velcro strips located on the legs. Zippers 37 extend from the lower edge of the legs up along their front surface, under patch pockets 28 almost to the level of the inguinal region 10. This arrangement of the zippers 37 became possible only due to the fact that in these areas on the front and back surfaces of the legs there are no pneumochambers or compartments. To put on the trousers, unzip the main zipper 36 on the belt and put them on. Wide opening zippers 37 along the legs allow you to quickly put on and take off anti-g trousers. This also makes it possible to put on anti-g pants with the flight suit already on and the shoes already on over the shoes and the suit and at the end, it is only necessary to fasten the main zipper 36 and the zippers 37 passing through the legs. An additional zipper 38 at the waist is used to expand the product at the waist if the pilot's waist circumference has increased slightly over time. After the zippers 36, 37 are closed, the anti-g trousers are ready to be connected to the compressed air source in the cockpit. In reverse order, the process of undressing is also very fast. This putting on and taking off of the trousers is thus possible in a matter of seconds in a way that could never be done, not even in the slightest, with other anti-G trousers. Until now, the anti-g suit has always been difficult to put on and never has been quick to put on and take off, and certainly not like jeans over a flight suit and pilot's boots.

In FIG. 23 shows these anti-g trousers with the zip fasteners 37 open along two sections of the legs in the calf area in a taut state, in a rear view. Two Velcro strips 39 are visible on the surface of these leg sections in the calf area, so that additional pockets can be attached here if necessary.

In FIG. 24 shows these anti-g trousers with the zipper 37 fully open on the right leg, when the product is worn on a bare body or a bare leg. It can be seen that the zipper 37 extends nearly its entire height to the crotch area 10 of the anti-g trousers. In order to open and close the zipper 37, the pocket 28 lying thereon is folded outward as shown above the right thigh, and then the Velcro strip 28 is pressed again with the fastener of this fastener. In an additional, not shown embodiment, to accommodate other pockets or tactical equipment on the thigh, the zipper 37 is located on the inside of the leg, almost reaching the level of the crotch of the anti-g trousers.

In FIG. 25 shows these anti-g trousers with the zipper 37 fully open on the left leg and the pocket 28 folded outward. Velcro strips 38 are visible on the surface below the pocket 28, by means of which the pocket 28 can be pressed against the leg surface and fixed there when the zipper 37 is closed. In FIG. 26 these anti-g trousers are shown fully open with pockets folded outward and two zippers 37 on the front of the legs.

In FIG. Figure 27 shows these anti-g pants worn on the naked body with closed zippers 37. The legs are loose and are located very close to the surface of the legs, whereby the anti-g pants are always ready to perform their functions. Due to their close-fitting but loose fit, their fit and the highly breathable fabric, unlike all other very bulky anti-g suit trousers and their airtight fabrics, the pilot can wear these anti-g trousers completely, even during longer breaks while on the ground. , or moreover, it can open the 37 zippers for cooling, which makes the anti-g pants even more comfortable to wear during work breaks. The person who wears these trousers hardly even notices them. In FIG. 28, the same anti-g pants are shown in the right side view, and in FIG. 29 is a view from the left side. Here you can see the supply hose 33 for compressed air. In FIG. 30, these anti-g trousers with open zippers 37 are shown with their rear surface lying freely on the floor, and in FIG. 31 you can see these anti-g trousers with open zippers 37, lying freely on the floor with their front surface.

How these anti-g pants can also be worn over a flight suit is shown in

- 10 042624 fig. 32. In this illustration, the zipper 37 on the front side of the calf section of the right leg of a person wearing anti-g pants is open, revealing the airman's suit underneath. In FIG. 33 shows anti-g trousers worn over a flight suit with closed zippers 37.

Finally, in FIG. 34 shows anti-g trousers worn by a pilot in full gear, namely, over his flight suit and over his shoes, so that the legs of the anti-g suit end on shoes or boots, as when wearing ordinary trousers. The zip fasteners 37 run here on the front of the legs from the bottom and they can go up to the crotch area, passing under the pockets 28, which can be folded to one side for this purpose, while being held in the position depicted in the figure by means of Velcro fasteners. An alternative model of trousers can also be made without fixed pockets, in which the pockets are only attached to anti-g trousers with Velcro, thanks to which the pilot can adapt the choice of bag, which is currently used on everyday flights. With these g-pants, the pilot is ready at any time from the state depicted in fig. 34, climb into the cockpit of the aircraft or get out of it, and proceed with the operation.

In principle, these anti-g trousers can be worn either under the pilot's suit and tucked into his boots, or, as a special feature, over the pilot's suit and over his boots, which is especially convenient for the pilot, because he can remove these anti-g trousers during breaks. at work and can put them back on as quickly as necessary and be ready for the next task in a matter of seconds. If anti-g pants are to be worn directly on the body, with only very light undergarments, it is advisable to cut them slightly tighter and more fitted than when worn over an airman's suit. In the latter case, the g-pants are cut relatively wide to compensate for the bulk of the fabric that makes up the flight suit.

As for the care of these anti-g trousers, it should be noted that they are very easy to wash and, accordingly, easy to keep clean. They can be washed in a regular washing machine. The extremely lightweight fabric, which weighs only 121±5 g/m ² , has proven itself to be impervious to soiling, whereby it is very easy to wash even if heavily soiled with oil or kerosene. The presented anti-g trousers are suitable for military and civil flights, and especially for aerobatics. They are suitable for both western and eastern aircraft sites, i.e. for any operating aircraft site. In this case, depending on the aircraft site, it is only necessary to change or adapt the connecting fittings to create excess pressure.

List of digital designations:

- compartments;

- hermetic layer;

- belt loops;

- trousers material;

- coccygeal canal;

- corners of the compartment;

- textile strips;

- belt;

- the lower edges of the trousers;

- inguinal area of trousers;

- the lower edge of the inguinal region;

- the outer side of the trousers;

- bag-shaped container as a pneumatic chamber;

- textile fragments on the front side of the legs, on which there are no pockets;

- textile fragments on the back of the legs, on which there are no pockets;

- lumbar region;

- connecting channel;

- inguinal canals;

- labial holes;

- notch in the area of the knee;

- ventilation ducts with a labial opening;

- supply hose;

- flight trousers;

- clutch;

- gluteal compartments covering half of the buttocks;

- pneumatic chambers of anti-overload trousers with 5 pneumatic chambers;

- hose for pneumatic chambers 26;

- hip pockets;

-

Claims (13)

29 - viewing window in the pockets on the hips; 30 - pneumatic chamber in anti-g trousers with full coverage; 31 - a place not covered by the pneumatic chamber; 32 - lateral hip areas; 33 - pressure hose of anti-g trousers with full coverage; 34 - compartments for the outer side of the legs; 35 - compartments for the inside of the legs; 36 - zippers for fastening the belt; 37 - zipper along the legs; 38 - second zipper to expand the waist on anti-g trousers; 39 - Velcro strips on the outer side of the leg sections in the shin area; 40 - notches on a traditional anti-g suit; 41 - zippers on the back side of the leg sections in the shin area; 42 - with a zipper or Velcro flap on the pocket 28. CLAIM 1. Trousers for protection against acceleration or g-trousers for pilots of an aircraft in which high accelerations take place, while at least parts of the anti-g-trousers are made with double walls and, in accordance with this, sealed compartments are formed inside or outside (1, 5, 13 , 17, 18, 25, 34, 35) which are configured to be subjected to acceleration-dependent air pressures, wherein the anti-g trousers consist entirely of a breathable, tear-resistant, flame-retardant and low-stretch synthetic fabric, with the anti-g trousers in certain compartments (1, 5, 13, 17, 18, 25, 34, 35) are provided in places, which are made with the possibility of inflating until their cross section is approximately circular by pumping them through a hose (22) going from the outside with a coupling (24) for connection to a compressed air source with automatic dosing, so that these compartments act like muscles, namely, their two opposite edges are made with the possibility of contracting them to each other, and the adjacent tissue sections (14, 15) are made with the possibility of stretching, characterized by that these compartments (34, 35) continuously run along the inner and outer surfaces of the legs and both are connected at the upper end of the legs by an inguinal canal (18) passing along the lower section of the inguinal region (11), while the compartments (34) are on the outer sides of the legs extend further upwards from the groin area and each of them ends in a sac-shaped pneumochamber (13) in the direction of the lower abdomen, while on the back side of the trousers, in the lumbar region (16) of the person wearing these trousers, they communicate with each other by means of a connecting canal (17), and the coccygeal canal (5) branches down from it, which passes between the buttocks of the person wearing these trousers, in the direction of the groin, and at the same time compartments (1, 5, 13, 17, 18, 25, 34, 35 ) communicate via at least one hose (22) with a coupling (24) with a compressed air source with automatic dosing. 2. Trousers for protection against acceleration or g-trousers according to claim 1, characterized in that the compartments (1, 5, 13, 17, 18, 25, 34, 35) are internally lined with an airtight elastomeric rubber material (2) so that they made with the possibility of inflating until their cross section is approximately circular, while they act as muscles, pulling together two of their opposite edges and, accordingly, adjacent tissue areas (14, 15). 3. Trousers for protection against acceleration or anti-g trousers according to claim 1, characterized in that through the compartments (1, 5, 13, 17, 18, 25, 34, 35) passes an elastically extensible, free-lying elastomeric air hose, through which ensures that the compartments are inflated until their cross section is approximately circular, so that these compartments act as muscles that pull together their two opposite edges and, accordingly, adjacent tissue areas (14, 15). 4. Trousers for protection against acceleration or anti-g-trousers according to one of the preceding claims, characterized in that the textile material consists of fully synthetic, antistatic, wear-resistant and low-stretch mixed textile yarns with aramid fibers, the weight of which per unit area is at most 130 g/ ^m2 , with air permeability according to DIN EN ISO 9237 up to 500 l/ ^m2 x s min and tensile strength according to ISO 13934-1 up to 2000 N/5 cm. 5. Acceleration protection trousers or anti-g trousers according to one of the preceding claims, characterized in that each leg of the anti-g trousers is provided with a zipper (37) at the front, which opens from the bottom up and closes from the top down, so that the two legs open almost to crotch area, and in accordance with this, anti-g trousers are made to be worn over a flight suit and over flight boots by the wearer, with the zippers (37) unfastened, and worn properly after the zippers (37) are fastened, and taking off over the pilot's boots after - 12 042624 the zippers (37) are open. 6. Anti-acceleration trousers or anti-g trousers according to one of items 1 to 4, characterized in that each leg of the anti-g trousers is provided with a zipper (37) inside, which opens from the bottom up and closes from the top down, to release the legs from the front when pockets or tactical equipment are positioned so that the two legs are separated from these zippers (37) and open almost to the crotch area, whereby the anti-g pants are worn over the flight suit and flight boots by the wearer when the zippers are the zippers (37) are open, worn properly after the zippers (37) are closed (37), and removed over the flight boots after the zippers (37) are unfastened. 7. Pants for protection against acceleration or anti-g pants according to one of the preceding claims, characterized in that one compartment (34), acting as a contracting muscle, passes in the form of a channel from the region near the belt (8) laterally outward down to the lower edges trousers (9), and each similar compartment (35) runs along the inner surface of the legs from the inguinal region to the lower edge of the trousers (9), and these compartments (35) are connected at the top with the outer compartments (34) by the corresponding inguinal canal (18), with In this way, single-layer, thin, breathable and continuous textile strips (14, 15) remain free in front and behind the legs, and each front strip (14) is divided along its entire length by a zipper (37). 8. Anti-acceleration or g-trousers according to one of the preceding claims, characterized in that on each side of the trousers the gluteal compartment (25) extends from the lateral hip region horizontally along the waist (8) behind to the lumbar region (16) to encircle the outer half of the two buttocks of the person wearing these trousers, while the two buttock compartments (25) are connected by a connecting canal (17), from which the coccygeal canal (5), whose width is from 2 to 6 cm, passes by an amount of at least measure 20 cm from the center of the waistband at the back and further down, to create pressure on the buttocks, but without the dangerous effect of an air cushion in the event of a seat catapult. 9. Trousers for protection against acceleration or anti-g trousers according to one of the preceding claims, characterized in that the outer compartments (34), which extend along the outer sides of the legs, at the level of the hip region, extend into a bag-shaped pocket serving as a pneumatic chamber (13), passing to the center of the trousers in front, to ensure that each inflated air chamber is exposed to the lower abdomen of the person wearing these trousers. 10. Trousers for protection against acceleration or anti-g trousers according to one of the preceding claims, characterized in that the inflatable compartments (5, 13, 17, 18, 25, 34, 35) pass over the two outer halves of the buttocks in the trousers, the lower abdomen under belt (8), as well as along the outer and inner surface of the legs and inguinal region. 11. Trousers for protection against acceleration or anti-g trousers according to one of the preceding paragraphs, characterized in that the anti-g trousers are provided with ventilation channels (21) extending along the compartments (1, 5, 13, 17, 18, 25, 34, 35) on the side that is intended to be opposite to the body, and these ventilation channels (21) are made with openings with closing lip-shaped edges (19) and with the possibility of supplying compressed air through these openings inside the anti-g trousers at the exact dosage to cool the surface of the body of the person wearing these trousers. 12. Trousers for protection against acceleration or anti-g trousers according to one of the preceding claims, characterized in that a pocket (28) with a viewing window (29) is attached to each of the front sides of the thighs so that this pocket (28) is sewn to the trouser leg along its outer and upper edge, while the lower and inner edge are only held by Velcro (38) on the leg, so that the pocket (28) folds outward to release the zipper (37) passing under it, while the pocket (28) with its bottom edge with flap (42) opens with a zipper or Velcro. 13. Trousers for protection against acceleration or g-trousers according to one of paragraphs 1 to 9, characterized in that a pocket (28) with a viewing window (29) is attached to the front side of the thighs so that this pocket (28) is held on the leg with Velcro (38), while the pocket (28) with its lower edge with a flap (42) opens with a zipper or Velcro. -