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1. (WO2018226112) ORTHÈSE CHEVILLE/PIED ANTÉRIEURE SEMI-AUTOMATIQUE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

1. A semiautomatic anterior ankle foot orthosis, characterised in that it comprises at least one pneumatic cylinder controlled by an electronic circuit wherein the at least one pneumatic cylinder is centrally assembled from the upper portion of the orthosis corresponding to the leg to the instep of the orthosis, or at least two pneumatic cylinders controlled by an electronic circuit wherein the at least two pneumatic cylinders are laterally assembled from the centre of the malleoli as being the articular centre of the ankle.

2. The ankle foot orthosis according to previous claim wherein the at pneumatic cylinders comprises at least one pneumatic chamber.

3. The ankle foot orthosis according to any of the preceding claims wherein the at least one pneumatic chamber comprises at least one electromechanically actuated valve, preferably a stepper-controlled needle valve.

4. The ankle foot orthosis according to claim 3 wherein the stepper-controlled needle valve is chosen from L16 or B25.

5. The ankle foot orthosis according to any of the preceding claims wherein the at least one electromechanically actuated valve is controlled by an electronic circuit that opens or closes the amount of input of air into the pneumatic chambers.

6. The ankle foot orthosis according to any of the preceding claims wherein the electronical circuit is controlled through a mobile application via Bluetooth® Low technology.

7. The ankle foot orthosis according to claim 6 wherein electronical circuit comprises an Arduino nano, a HC-05 Bluetooth module, and a relay.

8. The ankle foot orthosis according to any of the preceding claims wherein the structure of the anterior ankle foot orthosis is a high density thermoplastic.

9. The ankle foot orthosis according to claim 8 wherein the high density thermoplastic is polyethylene or polypropylene.

10. The ankle foot orthosis according to any of the preceding claims wherein the structure of the ankle foot orthosis is connected to the foot and leg with at least two bands of Velcro, one part is fixed in the anterior part of the high density thermoplastic in the area of the calf and in the metatarsal heads using rivets and the second part surrounds the limb in the calf and the metatarsal heads and is fixed to the first part.

11. A process for manufacturing the semiautomatic anterior ankle foot orthosis, characterised in that it comprises the following steps:

a) Cast the subject's lower limb using wet plaster bandages, from the distal part of the foot until the proximal area of the head of the fibula, rounding the limb. After the thermoplastic dries, a negative impression of the limb is obtained and the bonne areas are marked;

b) Cast modification with filing the negative impression with plaster and the plaster bandages are taken off when the moisture is dry;

c) Mould the anterior ankle foot orthosis with a high-density thermoplastic, defining limits of ankle foot orthosis and cutting it;

d) Assemble the pneumatic cylinders on the orthosis and adjust them according to subject's strength;

e) Assemble the electromechanical actuated valve in the pneumatic chamber of the pneumatic cylinder;

f) Assemble the electronical circuit on the pneumatic cylinder and batteries.

12. A process for manufacturing the semiautomatic anterior ankle foot orthosis according claim 9 wherein the casting of step a) each area of the limb is rounded by three layers of bandages.

13. A process for manufacturing the semiautomatic anterior ankle foot orthosis according any claims 9-10 wherein after step b) is made a 2 to 3 mm flat area of plaster, in length, from the head of the fibula until 2 cm to the centre of the malleoli in both lateral and medial sides this procedure is repeated for the areas from the metatarsal heads until 2 cm of the head of the malleoli and after finishing this process, a plaster is inserted between the two areas, rounding the area of the tibia, tarsal and metatarsal bones, creating an area of 3-7 mm, in both lateral and medial sides.

14. A semiautomatic anterior ankle foot orthosis according any preceding claims wherein the orthosis is used to treat a patient with drop foot gait condition associated to amyotrophic lateral sclerosis (ALS).