PatentDe  


Dokumentenidentifikation EP1227239 06.06.2007
EP-Veröffentlichungsnummer 0001227239
Titel Stirlingmaschinenantrieb für einen Prothesenglied
Anmelder Honda Giken Kogyo K.K., Tokio/Tokyo, JP
Erfinder Asai, Masahiro, Wako-shi, Saitama, JP;
Ban, Masaki, Wako-shi, Saitama, JP
Vertreter derzeit kein Vertreter bestellt
DE-Aktenzeichen 60128056
Vertragsstaaten DE, FR, GB, IT, NL
Sprache des Dokument EN
EP-Anmeldetag 20.12.2001
EP-Aktenzeichen 011304375
EP-Offenlegungsdatum 31.07.2002
EP date of grant 25.04.2007
Veröffentlichungstag im Patentblatt 06.06.2007
IPC-Hauptklasse F02G 1/055(2006.01)A, F, I, 20051017, B, H, EP
IPC-Nebenklasse A61F 2/76(2006.01)A, L, I, 20051017, B, H, EP   

Beschreibung[en]

The present invention relates to a drive unit for a prosthetic limb, which unit is adapted to move a prosthetic limb such as a prosthetic arm or a prosthetic leg with a power.

As drive types of such a drive unit for a prosthetic limb, there have been known a hydraulic type (see Japanese Patent Publication No. Sho 62-13017), a linear motor type (see Japanese Patent Laid-open No. Sho 63-3855), and a pneumatic type (see Japanese Utility Model Laid-open No. Sho 63-102420).

Even in the case of adopting a prior art drive unit of any one of the above-described types, a battery has been used as a power source of the drive unit. With respect to the use of a battery, since an energy density of the existing battery is as small as about 50 to 100 wh/kg, the battery fails to satisfy a long-time operation of the drive unit. To cope with such an inconvenience, it may be considered to make use of a power generation by an internal combustion engine; however, the use of the internal combustion engine is disadvantageous in terms of exhaust noise, oscillation, etc.

In view of the foregoing, the present invention has been made, and an object of the present invention is to provide a new drive unit for a prosthetic limb, which is capable of driving a prosthetic limb with a comfort for a long time.

To achieve the above object, according to a first feature of the present invention, there is provided a drive unit for a prosthetic limb, adapted to bendably/stretchably drive first and second prosthetic limb bodies, which are connected to each other via a joint, relative to each other, characterized by including: a Stirling engine composed a displacer unit mounted at an arbitrary portion other than the prosthetic limb bodies, and a power cylinder unit mounted between the prosthetic limb bodies for bending/stretching the prosthetic limb bodies relative to each other; wherein a compression chamber of the displacer unit is connected to an operation chamber of the power cylinder unit via a flexible pressure conduit; a combustor for heating an expansion chamber disposed in a displacer cylinder of the displacer unit is provided around a head portion of the displacer cylinder; fuel supply means is connected to the combustor; and an actuator for arbitrarily driving a displacer piston of the displacer unit is connected to the displacer piston. It is to be noted that the first and second prosthetic limb bodies correspond to a thigh portion 2 and a shank portion 4 constituting a prosthetic leg, respectively and the fuel supply means corresponds to a fuel cartridge 38 in an embodiment of the present invention to be described later.

With this first feature, since a bending/stretching speed of the second prosthetic limb body relative to the first prosthetic limb body can be controlled from zero to an arbitrary value by controlling an operational speed of the displacer piston from zero to an arbitrary value by means of the actuator. As a result, the prosthetic limb can be moved on the basis of the user's intention.

Since the combustion form in the combustor of the displacer unit is continuous combustion, it is possible to enhance a combustion efficiency and to eliminate any combustion oscillation, and since the fuel supply means is adopted, it is possible to bendably/stretchably drive the prosthetic limb for a long time.

Since only the power cylinder unit is provided on the prosthetic limb bodies and the relatively heavy displacer unit and the fuel supply means are disposed at arbitrary portions other than the first and second prosthetic limb bodies, it is possible to make both the prosthetic limb bodies lightweight and slim while ensuring a smooth bending/stretching motion of both the prosthetic limb bodies.

According to a second feature of the present invention, in addition to the first feature, a hydraulic converter for converting a pressure in the compression chamber into a hydraulic pressure and transmitting the hydraulic pressure to the operation chamber of the power cylinder unit is provided between the compression chamber and the pressure conduit.

With this second feature, since a pressure in the compression chamber of the displacer unit is converted into a hydraulic pressure by the hydraulic converter, and the hydraulic pressure is transferred to the operation chamber of the power cylinder, it is possible to eliminate occurrence of elastic compression, which has been caused for a working gas, in the pressure conduit and the operation chamber, and hence to improve a pressure transmission efficiency.

According to a third feature of the present invention, in addition to the first feature, power generating means driven by a second Stirling engine is connected to both a storage battery and an electronic control unit for controlling the actuator. It is to be noted that the power generating means corresponds to a power generating coil 73 in the embodiment of the present invention to be described later.

With the third feature, since the power generating means is operated by the second Stirling engine and thereby the storage battery is usually, automatically charged with sufficient electricity, the electronic control unit and the actuator can be usually, certainly operated by means of the storage battery. As a result, it is possible to operate the power cylinder unit for a longer time.

According to a fourth feature of the present invention, in addition to any one of the first, second and third features, the displacer unit and the actuator are mounted on a belt worn by a user.

With the fourth feature, a user can easily, rapidly, and simply mount/dismount the displacer unit by mounting/dismounting the belt on a user's body.

According to a fifth feature of the present invention, in addition to any one of the first, second and third features, the first and second prosthetic limb bodies are taken as a thigh portion and a shank portion constituting a prosthetic leg, respectively, and the displacer unit is contained in a hollow portion of a foot portion joined to a lower end of the shank portion.

With the fifth feature, it is possible to dispose the displacer unit by making effective use of a dead space in the foot portion of the prosthetic leg.

The present invention will be described with reference to the accompanying drawings, in which embodiments of the present invention are shown.

FIG. 1 is a front view of a user wearing a drive unit for a prosthetic limb according to a first embodiment of the present invention.

FIG. 2 is a rear view of the user.

FIG. 3 is a general view of the drive unit for a prosthetic limb, with its essential portion cutaway along the longitudinal direction.

FIG. 4 is a schematic view showing a second embodiment of the present invention.

FIG. 5 is a schematic view showing a third embodiment of the present invention.

FIG. 6 is a schematic view showing a fourth embodiment of the present invention.

A first embodiment of the present invention will be first described with reference to FIGS. 1 to 3.

Referring to FIGS. 1 and 2, a prosthetic leg 1 includes a thigh portion 2 integrated with a socket 2a in which a user's remaining thigh portion is to be inserted; a shank portion 4 bendably/stretchably connected to a lower end of the thigh portion 2 via a joint 3; and a foot portion 5 connected to a lower end of the shank portion 4. A drive unit A for a prosthetic limb of the present invention is used for bending/stretching the shank portion 4 relative to the thigh portion 2. The drive unit A includes a displacer unit 6 and a control unit 7, which are mounted on a belt B worn around a user' waist portion; a power cylinder unit 8 mounted on the prosthetic leg 1; and a pressure conduit 22 for transmitting a pressure generated in the displacer unit 6 to the power cylinder unit 8. A configuration of such a drive unit A for a prosthetic limb will be more fully described with reference to FIG. 3.

The displacer unit 6 includes a displacer cylinder 10; a displacer piston 13 slidably inserted in the cylinder 10 so as to partition the interior of the cylinder 10 into an expansion chamber 11 on a head side of the cylinder 10 and a compression chamber 12 on a bottom side of the cylinder 10; a combustor 14, provided on the head portion of the displacer cylinder 10, for heating the expansion chamber 11; a radiator 15, provided on the bottom portion of the displacer cylinder 10, for cooling the compression chamber 12; a heat regenerator 17 interposed in a communication port 16 for connecting the expansion chamber 11 to the compression chamber 12; and a motor-driven actuator 20 for driving the displacer piston 13 via a rod 18 passing through the bottom portion of the displacer cylinder 10. A displacer piston sensor 21 for detecting a position of the displacer piston 13 is provided on the actuator 20.

The combustor 14 is of a catalyst type in which a combustion housing 25 formed on an outer surface of the head portion of the displacer cylinder 10 is filled with a catalyst 26 for combustion. A fuel-air mixer 27 is provided at one end portion of the combustion housing 25, and an exhaust pipe 28 is provided at the other end of the housing 25.

A heat exchange wall 29 for covering the combustion housing 25 and a base portion of the exhaust pipe 28 is formed around the combustion housing 25. A shroud 30 for covering the heat exchange wall 29 is formed around the heat exchange wall 29. An air intake port 31 formed in the shroud 30 is communicated to an air inlet of the fuel-air mixer 27 via an air passage 32 meandering in each space between two of the combustion housing 25, the heat exchange wall 29, and the shroud 30.

A thermal-electric converting device 34 is additionally provided on the shroud 30 at a position near the heat exchange wall 29. The thermal-electric converting device 34 converts heat transferred from the heat exchange wall 29 into electricity, to charge a storage battery 39 with electricity. A supporting wall 35 for containing the actuator 20 while supporting a fixed portion of the actuator 20 is provided in such a manner as to be continuous to the shroud 30.

The control unit 7 includes an electronic control unit 37, a fuel cartridge 38, the storage battery 39 as a power source for the electronic control unit 37, and a manually operated controller 40 for arbitrarily operating the electronic control unit 37. The electronic control unit 37, the fuel cartridge 38, and the storage battery 39 are contained in a control box 41. The fuel cartridge 38 is filled with a fuel such as benzine, alcohol, or butane.

A fuel outlet of the fuel cartridge 38 is connected to a fuel inlet of the fuel-air mixer 27 via a fuel conduit 42. A fuel adjuster 44 for adjusting a flow rate of fuel is interposed in the fuel conduit 42. An ignition plug 45 is provided in the combustion housing 25 at a position adjacent to the mixer 27.

The power cylinder unit 8 constitutes a Stirling engine E in cooperation with the displacer unit 6. The power cylinder unit 8 includes a power cylinder 47 pivotably connected to one of the thigh portion 2 and the shank portion 4, and a power piston 48 pivotably connected to the other of the thigh portion 2 and the shank portion 4 while slidably inserted in the power cylinder 47. An operation chamber 49 defined in the power cylinder 47 by means of the power piston 48 is communicated to the compression chamber 12 of the displacer unit 6. In this way, the power cylinder unit 8 constitutes the Stirling engine E of a free piston type in cooperation with the displacer unit 6.

A bending/stretching angle sensor 51 for detecting a bending/stretching angle between the thigh portion 2 and the shank portion 4 is mounted at a position between the thigh portion 2 and the shank portion 4. An output signal from the bending/stretching angle sensor 51 and output signals from the manually operated controller 40 and the displacer piston sensor 21 are inputted in the electronic control unit 37. On the basis of these signals, the electronic control unit 37 controls the actuator 20 and the fuel adjuster 44.

A function of the first embodiment will be described below.

A fuel is fed from the fuel cartridge 38. The flow rate of the fuel is adjusted by the fuel adjuster 44. The fuel is then supplied to the fuel-air mixer 27, to be mixed with air which has flown from the air intake port 31 into the fuel-air mixer 27 via the air passage 32. The fuel-air mixture is ignited once by the ignition plug 45, and thereafter, the combustion of the fuel-air mixture is continuously accelerated by the catalyst 26, to heat the expansion chamber 11 from the head portion side of the displacer cylinder 10 at a specific high temperature. An exhaust gas generated by the combustion is discharged to the outside through the exhaust pipe 28.

The radiator 15 keeps the compression chamber 12 in a specific low temperature state. The heat regenerator 17 receives heat from a working gas which is moving between the expansion chamber 11 and the compression chamber 12 via the communication port 16.

The actuator 20 is operated on the basis of a command from the electronic control unit 37, to reciprocate the displacer piston 13, thereby generating a pressure amplitude in the compression chamber 12. The pressure is transmitted to the operation chamber 49 of the power cylinder 47 via the flexible pressure conduit 22, to reciprocate the power piston 48, thereby bending/stretching the shank portion 4 relative to the thigh portion 2. The bending/stretching motion of the shank portion 2 relative to the thigh portion 4 assists walking of the user.

At this time, to efficiently drive the power piston 48, the electronic control unit 37 identifies a position of the power piston 48 on the basis of an output signal from the bending/stretching angle sensor 51, and operates the actuator 20 such that the displacer piston 13 is in advance of the power piston 48 by a converted crank angle of 90°. Further, the electronic control units 37 may controls the operational speed of the displacer piston 13 from zero to an arbitrary value so as to control the bending/stretching speed of the shank portion 4 relative to the thigh portion 2 from zero to an arbitrary value. With this configuration, the prosthetic leg 1 can be moved on the basis of the user's intention.

As a result of experiments, it was recognized that when a power equivalent to 60 W was generated by using 30 cc of a fuel (liquefied butane) with the aid of the catalyst 26, the drive unit of the present invention could be operated for six hours.

Since the combustion form by the catalyst type combustor 14 is continuous combustion, it is possible to enhance a combustion efficiency and to eliminate any combustion oscillation, and since the fuel cartridge 38 is adopted, it is possible to rapidly supplement a fuel and also to operate the drive unit for assisting walking of the user for a long time.

Since power consumption of the storage battery 39 as the power source for the electronic control unit 37 is very small and further part of heat generated by the combustor 14 is converted into an electric energy by the thermal-electric converting device 34 to be stored in the storage battery 39, the useful life of the storage battery becomes longer.

Since only the power cylinder unit 8 is provided on the prosthetic leg 1 while the relatively heavy displacer unit 6, the fuel cartridge 38, the electronic control unit 37, etc. are mounted on the belt B worn around the user's waist portion, and the displacer unit 6 is connected to the power cylinder unit 8 via the pressure conduit 22, it is possible to make the prosthetic leg 1 lightweight and slim while ensuring the smooth bending/stretching motion of the prosthetic leg 1. It is also possible for the user to easily, rapidly, and simply mount/dismount the displacer unit 6 by mounting/dismounting the belt B around the waist portion.

According to a second embodiment of the present invention shown in FIG. 4, a hydraulic converter 53 for converting the pressure in the compression chamber 12 into a hydraulic pressure is provided on the displacer unit 6, and an output port of the hydraulic converter 53 is connected to the operation chamber 49 of the power cylinder 47 via the pressure conduit 22. The other configurations are the same as those of the first embodiment, and therefore, parts in FIG. 4 corresponding to those in the first embodiment are designated by the same reference numerals and the overlapped description thereof is omitted.

According to the second embodiment, since the pressure in the compression chamber 12 of the displacer unit 6 is converted into a hydraulic pressure by the hydraulic converter 53, and the hydraulic pressure is transferred to the operation chamber 49 of the power cylinder 47, it is possible to eliminate occurrence of elastic compression, which has been caused for a working gas, in the pressure conduit 22 and the operation chamber 49, and hence to improve a pressure transmission efficiency.

According to a third embodiment of the present invention shown in FIG. 5, the displacer unit 6, the fuel cartridge 38, the electronic control unit 37, and the storage battery 39, and further a communication unit 54b connected to the electronic control unit 37 are contained in a hollow portion 5a of the foot portion 5 of the prosthetic leg 1, while the manually operated controller 40, a general control unit 55 for processing an output signal from the manually operated controller 40, and a communication unit 54a for generating a radio wave corresponding to an output signal from the general control unit 55 are mounted to the belt B. The power cylinder unit 8 is operated by a radio wave transferred between both the communications 54a and 54b. The other configurations are the same as those of the second embodiment, and therefore, parts in FIG. 5 corresponding to those in the second embodiment are designated by the same reference numerals and the overlapped description thereof is omitted.

According to the third embodiment, it is possible to dispose the displacer unit 6, etc. by making effective use of a dead space in the foot portion 5 of the prosthetic leg 1.

A fourth embodiment of the present invention will be described with reference to FIG. 6.

A first displacer unit 6 and a second displacer unit 60 are mounted on the belt B. The first displacer unit 6 has the same configuration as that of the displacer unit 6 in the first embodiment, and a compression chamber 12 thereof is connected to an operation chamber 49 of a power cylinder unit 8 of a prosthetic leg 1 via a pressure conduit 22.

A permanent magnet 63 is additionally provided in a displacer piston 62 inserted in a displacer cylinder 61 of the second displacer unit 60, and a drive coil 64 for driving the displacer piston 62 in cooperation with the permanent magnet 63 is fixedly provided on a bottom portion of the displacer cylinder 61. A power cylinder 65 is provided on a bottom portion of the displacer cylinder 61 in such a manner as to be coaxial with the displacer cylinder 61. A power piston 66 having a permanent magnet 72 is slidably inserted in the power cylinder 65. The interior of the power cylinder 65 is partitioned into an operation chamber 67 on a head side and a spring chamber 68 on a bottom side by means of the power piston 66. The operation chamber 67 is communicated to a compression chamber 77 of the displacer cylinder 61. A spring 69 for biasing the power piston 66 to the operation chamber 67 side is contained in the spring chamber 68.

A combustor 14, commonly used for the first displacer unit 6 and the second displacer unit 60, is provided on a head side of the displacer cylinder 61, and a radiator 80 is additionally provided on a bottom portion of the displacer cylinder 61. A heat regenerator 79 is interposed in a communication port 78 for communicating an expansion chamber 76 to a compression chamber 77.

A power generating coil 73 for generating a power in cooperation with a permanent magnet 72 additionally provided around the power piston 66 is provided around an outer periphery of the power cylinder 65. A displacer drive circuit 75 is inserted in an electric circuit 74 for connecting the power generating coil 73 to the drive coil 64. The electric circuit 74 is also connected to a storage battery 39. The power cylinder 65 and the power piston 66 constitute a second Stirling engine E2 in cooperation with the second displacer unit 66.

The other configurations are the same as those of the first embodiment, and therefore, parts in FIG. 6 corresponding to those in the first embodiment are designated by the same reference numerals and the overlapped description thereof is omitted.

According to the fourth embodiment, after the displacer piston 62 is once reciprocated by driving the drive coil 64 via the displacer drive circuit 75, a pressure amplitude generated in the compression chamber 77 is transferred to the operation chamber 67 of the power cylinder 65, to freely oscillate the power piston 66 having the permanent magnet 72 in cooperation with the spring 69, so that an electric energy is taken out of the power generating coil 73 and is supplied to the storage battery 39 and the electronic control unit 37.

With this configuration, since the storage battery 39 is usually, automatically charged with sufficient electricity, it can usually, certainly operate the actuator 20 of the first displacer unit 6. As a result, it is possible to operate the power cylinder unit 8 of the drive unit for assisting walking of the user for a longer time.

The present invention is not limited to the above-described embodiments, and it is to be understood that various changes in design may be made without departing from the scope of the present invention. For example, the present invention can be applied to drive of a prosthetic arm. The present invention can be also modified such that the first and second prosthetic limb bodies are mounted to a leg or an arm of a normal worker for giving care to patients or performing heavy work, and are driven by the drive unit A of the present invention, to thereby reduce a labor of the worker.

The invention provides a drive unit for a prosthetic limb, which is capable of driving a prosthetic limb with a comfort for a long time.

To achieve this, a Stirling engine E is composed of a displacer unit 6 mounted at an arbitrary portion other than prosthetic limb bodies 2 and 4, and a power cylinder unit 8 mounted between the prosthetic limb bodies 2 and 4 for bending/stretching the prosthetic limb bodies 2 and 4 relative to each other. A compression chamber 12 of the displacer unit 6 is connected to an operation chamber 49 of the power cylinder unit 8 via a flexible pressure conduit 22. A combustor 14 for heating an expansion chamber 11 disposed in a displacer cylinder 10 of the displacer unit 6 is provided around a head portion of the displacer cylinder 10. Fuel supply means 38 is connected to the combustor 14. An actuator 20 for arbitrarily driving a displacer piston 13 of the displacer unit 6 is connected to the displacer piston 13.


Anspruch[de]
Antriebseinheit für ein Prothesenglied, die dazu ausgelegt ist, erste und zweite Prothesengliedkörper (2, 4), die miteinander über ein Gelenk (3) verbunden sind, relativ zueinander biegend/streckend anzutreiben, dadurch gekennzeichnet, dass sie enthält: einen Stirling-Motor (E), zusammengesetzt aus einer Verdrängereinheit (6), die an einem beliebigen anderen Abschnitt als den Prothesengliedkörpern (2, 4) angebracht ist, und einer Antriebszylndereinheit (8), die zwischen den Prothesengliedkörpern (2, 4) angebracht ist, um die Prothesengliedkörper (2, 4) relativ zueinander zu biegen/zu strecken; wobei eine Kompressionskammer (12) der Verdrängereinheit (6) mit einer Arbeitskammer (49) der Antriebszylindereinheit (8) über eine flexible Druckleitung (22) verbunden ist; ein Brenner (14) zum Erhitzen einer Brennkammer (11), die in einem Verdrängerzylinder (10) der Verdrängereinheit (6) angeordnet ist, um einen Kopfabschnitt des Verdrängerzylinders (10) herum vorgesehen ist; ein Brennstoffzuführmittel (38) mit dem Brenner (14) verbunden ist; und ein Aktuator (20) zum beliebigen Antrieb eines Verdrängerkolbens (13) der Verdrängereinheit (6) mit dem Verdrängerkolben (13) verbunden ist. Antriebseinheit für ein Prohesenglied nach Anspruch 1, worin ein hydraulischer Konverter (53) zum Umwandeln eines Drucks in der Kompressionskammer (12) in Hydraulikdruck und zum Übertragen des Hydraulikdrucks zu der Arbeitskammer (49) der Antriebszylindereinheit (8) zwischen der Kompressionskammer (12) und der Druckleitung (22) vorgesehen ist. Antriebseinheit für ein Prothesenglied nach Anspruch 1, worin ein Stromerzeugungsmittel (73), das von einem zweiten Stirling-Motor (E') angetrieben ist, mit sowohl einer Speicherbatterie (39) als auch einer elektronischen Steuereinheit (37) zum Steuern/Regeln des Aktuators (20) verbunden ist. Antriebseinheit für ein Prothesenglied nach einem der Ansprüche 1 bis 3, worin die Verdrängereinheit (6) und der Aktuator (20) an einem vom Benutzer getragenen Gurt (B) angebracht sind. Antriebseinheit für ein Prothesenglied nach einem der Ansprüche 1 bis 3, worin die ersten und zweiten Prothesengliedkörper jeweils als Oberschenkelabschnitt (2) und Unterschenkelabschnitt (4), die eine Beinprothese (1) darstellen, dienen, und die Verdrängereinheit (6) in einem hohlen Abschnitt (5a) eines Fußabschnitts (5) aufgenommen ist, der mit einem Unterende des Unterschenkelabschnitts (4) verbunden ist.
Anspruch[en]
A drive unit for a prosthetic limb, adapted to bendably/stretchably drive first and second prosthetic limb bodies (2, 4), which are connected to each other via a joint (3), relative to each other, characterized by including: a Stirling engine (E) composed of a displacer unit (6) mounted at an arbitrary portion other than said prosthetic limb bodies (2, 4), and a power cylinder unit (8) mounted between said prosthetic limb bodies (2, 4) for bending/stretching said prosthetic limb bodies (2, 4) relative to each other; wherein a compression chamber (12) of said displacer unit (6) is connected to an operation chamber (49) of said power cylinder unit (8) via a flexible pressure conduit (22); a combustor (14) for heating an expansion chamber (11) disposed in a displacer cylinder (10) of said displacer unit (6) is provided around a head portion of said displacer cylinder (10); fuel supply means (38) is connected to said combustor (14); and an actuator (20) for arbitrarily driving a displacer piston (13) of said displacer unit (6) is connected to said displacer piston (13). A drive unit for a prosthetic limb according to claim 1, wherein a hydraulic converter (53) for converting a pressure in said compression chamber (12) into a hydraulic pressure and transmitting the hydraulic pressure to said operation chamber (49) of said power cylinder unit (8) is provided between said compression chamber (12) and said pressure conduit (22). A drive unit for a prosthetic limb according to claim 1, wherein power generating means (73) driven by a second Stirling engine (E') is connected to both a storage battery (39) and an electronic control unit (37) for controlling said actuator (20). A drive unit for a prosthetic limb according to any one of claims 1 to 3, wherein said displacer unit (6) and said actuator (20) are mounted on a belt (B) worn by a user. A drive unit for a prosthetic limb according to any one of claims 1 to 3, wherein said first and second prosthetic limb bodies are taken as a thigh portion (2) and a shank portion (4) constituting a prosthetic leg (1), respectively, and said displacer unit (6) is contained in a hollow portion (5a) of a foot portion (5) joined to a lower end of said shank portion (4) .
Anspruch[fr]
Dispositif d'entraînement pour un membre prothétique, adapté pour entraîner en flexion/étirement des premier et deuxième corps de membre prothétique (2, 4), connectés l'un à l'autre via une articulation (3), caractérisé en ce qu'il comprend: un moteur Stirling (E), composé d'une unité motrice (6), montée en une partie arbitraire autre que lesdits corps de membre prothétique (2, 4), et une unité à vérin (8), montée entre lesdits corps de membre prothétique (2, 4) pour faire fléchir/étirer lesdits corps de membre prothétique (2, 4) relativement entre eux; dans lequel une chambre de compression (12) de ladite unité motrice (6) est reliée à une chambre d'actionnement (49) de ladite unité à vérin (8), via une conduite à pression (22) flexible; une chambre de combustion (14), pour chauffer une chambre d'expansion (11) disposée dans un cylindre de piston déplaceur (10) de ladite unité de déplacement (6), qui est prévue autour d'une partie de tête dudit cylindre de piston déplaceur(10) ; des moyens d'alimentation en combustible (38) sont connectés à ladite chambre de combustion (14) ; et un actionneur (20), pour entraîner de façon arbitraire un piston déplaceur (13) de ladite unité de déplacement(6), est connecté audit piston déplaceur (13). Dispositif d'entraînement pour un membre prothétique selon la revendication 1, dans lequel un convertisseur hydraulique (53), pour convertir une pression dans la chambre de combustion (12) en une pression hydraulique et transmettre la pression hydraulique à ladite chambre d'actionnement (49) de ladite unité à vérin (8), est prévu entre ladite chambre de compression (12) et ledit conduit à pression (22). Dispositif d'entraînement pour un membre prothétique selon la revendication 1, dans lequel des moyens de génération d'énergie (73), entraînés par un deuxième moteur Stirling (E'), sont connectés à la fois à une batterie de stockage (39) et à une unité de commande électronique (37) pour commander ledit actionneur (20). Dispositif d'entraînement pour un membre prothétique selon l'une quelconque des revendications 1 à 3, dans lequel ladite unité de déplacement (6) et ledit actionneur (20) sont montés sur une ceinture (B) portée par un utilisateur. Dispositif d'entraînement pour un membre prothétique selon l'une quelconque des revendications 1. à 3, dans lequel lesdits premier et deuxième corps de membre prothétique sont réalisés sous forme de partie de cuisse (2) et de partie de jambe inférieure (4) constituant une jambe prothétique (1), respectivement, et ladite unité de déplacement (6) est contenue dans une partie creuse (5a) d'une partie de pied (5), reliée à une extrémité inférieure de ladite partie de jambe inférieure (4).






IPC
A Täglicher Lebensbedarf
B Arbeitsverfahren; Transportieren
C Chemie; Hüttenwesen
D Textilien; Papier
E Bauwesen; Erdbohren; Bergbau
F Maschinenbau; Beleuchtung; Heizung; Waffen; Sprengen
G Physik
H Elektrotechnik

Anmelder
Datum

Patentrecherche

Patent Zeichnungen (PDF)

Copyright © 2008 Patent-De Alle Rechte vorbehalten. eMail: info@patent-de.com