Pneumostome lower-limb prosthesis

 

(57) Abstract:

The invention relates to the technical means of rehabilitation of the disabled, in particular to the field of prosthetics missing limbs. Pneumostome contains pneumoseparation enclosed in forming the elastic body of the foot. Each of pneumocephaly is a gas-filled chamber is made of a material forming a sealed envelope with forming filler, connected by a flexible hose with locking device. The locking device pneumocephaly grouped on the top floor of the body of the foot. Gas-filled chamber pneumothoraces located in the zone of intensive support loads, enclosed in a brace. The technical result consists in the fact that due to the limited elasticity of the bandage covering pneumatometer, limited deformation of the heel of the foot in the peripheral directions. Pneumonial under increasing domestic pressure to expand mainly in areas not covered by the bandage, which contributes to greater efficiency of its shock-absorbing action. The shape of the foot will not undergo undesirable changes no not the m means of rehabilitation of the disabled, namely, the field of prosthetics missing limbs.

Known analog - stop lower-limb prosthesis according to patent RU 2061444. This foot has three pneumothoraces placed inside the elastic body of the foot - in his heel, plantar and dorsal areas. The main disadvantage of this design is that pneumoseparation are not displayed in the available area of the locking device; adjusting the internal pressure in pneumothoraces was assumed by extrusion, that has not proven itself in practice.

Known also pneumostome lower-limb prosthesis according to patent RU 2103953 taken as a prototype. It contains pneumoseparation enclosed in forming the elastic body of the foot and connected with a flexible hose with locking devices are grouped on the top floor of the body of the foot. A characteristic feature of this solution is that each pneumocephaly is a sealed elastomer chamber with elastic mesh placeholder internal cavity.

The disadvantage of this design is that the elastomeric gas-filled chamber, the shell having a relative elongation of Gushie properties require as part of the foot and/or design put on her shoes power elements, able to restrain the expansion of pneumothoraces beyond the external contour acceptable to the appearance of the artificial foot and its interaction with the shoes. It should be noted that when walking on an artificial foot, at least the heel and plantar pneumoseparation take the load bearing surface of the foot, causing additional functional compression pneumocephaly in the vertical direction, in which case the extension pneumocephaly in the transverse direction is not limited to the surrounding structural elements, leads to an undesirable loss of shape of the foot and makes it possible to achieve the desired shock-absorbing and energy-saving effect. First of all stated refers to the heel pnevmoservice experiencing the most intense deforming load when walking on artificial legs.

The technical result achieved in pneumostome of the present invention is a significant improvement in shock-absorbing and energy-saving properties pneumostome while maintaining its shape in the support part, close to the original, regardless of performance boost pneumocephaly. Offer the s, Slippers that do not have structural rigidity in the transverse direction.

The essence of the invention lies in the fact that in pneumostome lower-limb prosthesis containing pneumoseparation enclosed in forming the elastic body of the foot, and each of pneumocephaly is gas-filled chamber is made of a material forming a hermetic shell with a structured formative filler or without a locking device, gas-filled chamber pneumothoraces located in the heel area pneumostome, enclosed in a brace.

In Fig.1 shows the design-layout scheme pneumostome lower-limb prosthesis.

In Fig.2 - section a-a in Fig.1.

In forming the elastic body 1 containing the bearing endoskull (frame) 2, mounted pneumoseparation: back 3, bottom 4 and the heel 5. Pneumoseparation 3, 4, 5 are gas-filled chambers 6, 7 and 8, respectively, connected with the locking device in the form of valves pressurization and bleed 9, 10, 11, respectively, for the back 3, bottom 4 and the heel 5 pneumocephaly placed at the top of pneumostome. Pneumonial 5, Ronny 4 and the heel 5 pneumoseparation serve as shock absorbers supporting loads. Back pneumonial 3 also partly involved in the mechanical working of the foot, supporting the shape of the forefoot with the toe push, but its main purpose is to regulate the shape of the foot in the lift under used by the disabled person shoes.

The most intense concentrated load at the bearing on the heel of the foot prosthesis perceives the heel pneumonial 5. Gas-filled shell 8 in combination with the side walls of the elastic body 1 in the heel area of the foot undergoes during the preliminary pressurization and supporting disabled on the heel considerable - up to several hundred percent tensile strain, resulting in "not benevolency" pneumonial may not provide sufficient expect him to give cushioning effect, also in this case there is undesirable tensile action of the heel of the foot on the heel of the Shoe. Due to the limited elasticity of the bandage 12 is limited deformation of the heel of the foot in the peripheral directions. Pneumonial 5 under increasing domestic pressure to expand mainly in areas not covered by the bandage, which contributes to greater efficiency of its cushioning DM the boost pneumocephaly depending on biomechanical feasibility for specific people-the prosthesis. The shape of the foot will not undergo undesirable changes neither in the unloaded state, nor in the support phase step when walking.

Pneumostome lower-limb prosthesis containing pneumoseparation enclosed in forming the elastic body of the foot, and each of pneumocephaly is a gas-filled chamber is made of a material forming a sealed envelope with forming filler, locking device, characterized in that the gas-filled chamber pneumothoraces located in the heel area pneumostome, enclosed in a brace.

 

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FIELD: medical engineering.

SUBSTANCE: device has proximal portion rotatable in counter direction with respect to elastic spring action of torsion unit relative to distal portion in positive and negative rotation direction. The torsion unit has positive rotation direction torsion characteristic differing from that in negative rotation direction. The torsion unit has two separate springy torsion members having different spring characteristics and placed with prestress between supporting members mounted between the torsion members so that only one of springy torsion members acts in one of rotation directions.

EFFECT: high functional quality.

22 cl, 2 dwg

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