Wearable thorax percussion device
A wearable thorax percussion device for dislodging mucous buildup in the airways of a human patient, the device comprising frame elements and electromechanical actuators retained by the frame elements to intermittently percuss the thorax, and an electronic controller and power source for generating and modulating an electrical signal to energize the actuator. The frame elements may be interconnected by a garment, or fasteners and elastic or adjustable strapping.
1. A wearable thorax percussion device, the device comprising:
(a) at least one frame element comprising a generally L-shaped, flat, rigid layer having a first end and a second end;
(b) at least one electromechanical actuator retained by the at least one frame element and comprising a reciprocating member for causing percussive forces against a thorax of a person, either directly or indirectly; and
(c) an electronic controller and a power source operatively connected to the at least one actuator, for generating and modulating an electrical signal to energize the at least one actuator; wherein the generally L-shaped, flat, rigid layer has a hole formed adjacent at least one of the first end and the second end, wherein the at least one electromechanical actuator includes a first electromechanical actuator extending through the hole in substantially perpendicular relation with the generally L-shaped, flat, rigid layer.
2. The device of claim 1 wherein the device comprises a front frame element and a rear frame element, interconnected by a plurality of straps, at least one of which is elastic or adjustable, or elastic and adjustable.
3. The device of claim 2 wherein the front frame element comprises two symmetrical halves disposed on opposite sides of a front fastener system.
4. The device of claim 2 wherein each frame element retains two or more actuators.
5. The device of claim 4 wherein the at least one electromechanical actuator comprises eight actuators comprising four front actuators and four rear actuators, each positioned in a quadrant created by a vertical midline and a horizontal midline through the thorax.
6. The device of claim 1 wherein the electronic controller is adapted to drive each actuator at a frequency below about 20 Hz.
7. The device of claim 1 wherein each actuator applies a force of between about 1 pound and about 10 pounds with each percussive strike.
8. The device of claim 1 wherein each frame element further comprises a flexible layer.
9. The device of claim 8 wherein each frame element comprises an inner rigid layer and an outer rigid layer, and a foam layer disposed therebetween.
10. The device of claim 9 wherein the foam layer comprises a viscoelastic foam layer.
11. The device of claim 1 further comprising a garment in which the at least one frame element and the at least one electromechanical actuator are included.
12. The device of claim 1 wherein each actuator comprises an inner cap and an outer housing, enclosing an electromagnet and a permanent magnet, one of the electromagnet and the permanent magnet of which reciprocates in response to the electrical signal.
13. The device of claim 1 wherein each actuator comprises an inner cap and an outer housing, enclosing an electromagnet and a permanent magnet, and wherein the electromagnet reciprocates on a guide shaft and comprises rebound control elements at both ends of the guide shaft.
14. The device of claim 1 wherein the rigid layer is substantially rigid in a planar direction and flexible in a direction normal to the planar direction.
15. The device of claim 1 wherein each frame member comprises an inner conformable layer.
16. The device of claim 15 wherein the at least one actuator is mounted flush with the inner conformable layer.