Portable, standalone device for muscle recovery by means of cryotherapy

1 . Standalone mobile device for muscle recovery by cryotherapy, characterised in that it comprises:

a container of pressurised fluid;

an expander for reducing the pressure of the pressurised fluid, fluidically connected to the container and equipped with an outlet for the expanded gas;

a sheet of thermally conductive material configured to rest on a skin of a user, and equipped with a heat exchanger radiator positioned on a path of the expanded gas output from the gas expander, the radiator having parallel vertical metal fins between which the expanded gas from the outlet of the expander circulates.

2 . Device according to claim 1 , which also comprises a removable support means for keeping the sheet in position against a user's limb.

3 . Device according to claim 2 , wherein the removable support means comprises at least one strip of hook-and-loop fabric.

4 . Device according to claim 1 which also comprises a means for controlling the passage of fluid between the container and the expander, the control means being configured to limit, during use, an average flow rate of fluid leaving the container to a value lower than a maximum possible flow rate.

5 . Device according to claim 4 , which also comprises at least one sensor of a temperature representative of the sheet in contact with the skin, the control means being configured to servo the flow rate of fluid leaving the container to a temperature captured.

6 . Device according to claim 4 , wherein the container comprises a valve which opens by angular offset, the control means comprising a servomotor resting on the expander and the control means being configured to control a movement of the servomotor.

7 . Device according to claim 4 , wherein the container comprises a valve which opens by translation towards the container, the control means comprising a servomotor resting on the expander and the control means being configured to control a movement of the servomotor.

8 . Device according to claim 1 , wherein the sheet of thermally conductive material comprises aluminum.

9 . Device according to claim 1 , wherein the sheet of thermally conductive material has a concave shape.

10 . Device according to claim 1 , wherein the pressurised fluid in the container is hydrofluoroolefin in the form of a compressed gas.

11 . Mechanical connector for a device according to claim 1 , configured to keep the container of pressurised fluid in position in a compartment of the device such that the expander is fluidically connected to the container.

12 . Mechanical connector according to claim 11 , which has a general cylindrical shape with a circular guide, a central opening and radial spurs extending beyond a generatrix of this cylindrical shape.

13 . Mechanical connector according to claim 12 , which has portions of spheres on an inner surface of the opening.

14 . Mechanical connector according to claim 11 , which comprises radial indentations in its cylindrical wall, which indentations define clips having retractable tabs ( 55 ) oriented towards a central axis of the connector, and which indentations' free end has a chamfered shape.

15 . Method for muscle recovery by cryotherapy, characterised in that it comprises:

a step of positioning a sheet of thermally conductive material configured to rest on the skin of the user, and equipped with a heat exchanger radiator,

a step of expanding a pressurised fluid against the sheet,

wherein the radiator has parallel vertical metal fins between which the expanded gas from an outlet of the expander circulates.

16 . Method according to claim 15 , which also comprises:

a step of measuring a temperature of the sheet;

a step of comparing the temperature measured to a predefined temperature limit, in which method the expansion step is utilised depending on the result of the comparison step.