High frequency oscillator ventilator
View Patent ↗Provided is a high frequency oscillating ventilator comprising a housing assembly, a linear actuator, a linear coil, a piston mounted on a pushrod, a diaphragm dividing a housing into a first and second side and having an opening formed on the second side that is fluidly connected to the patient's airway for delivering gas thereto. The linear actuator is fixedly mounted to the housing assembly and has a linear coil coaxially disposed therewithin. A pushrod supports the linear coil on the linear actuator to allow relative axially sliding therebetween. The piston is directly mounted to the diaphragm such that reciprocation thereof as effectuated by the linear coil cooperating with the linear actuator alternately produces positive and negative pressure waves in the gas in the patient's airway.
1. A high frequency oscillating ventilator, comprising:
a housing assembly;
a linear actuator fixedly mounted within the housing assembly;
a linear coil coaxially disposed within the linear actuator and having a pushrod extending axially therethrough for axially slidably supporting the linear coil on the linear actuator;
a disk-shaped piston mounted on an end of the pushrod, the piston comprising a flange that extends around a peripheral edge thereof;
a disk-shaped cover plate;
a disk-shaped diaphragm sealingly dividing the housing assembly into a first side and a second side and being operatively engageable to the piston, the diaphragm having a rolling portion that (i) rolls along a side portion of the piston as the piston moves and (ii) comprises a deep radius groove formed about a periphery thereof, the diaphragm being captured between the piston and the cover plate;
wherein the housing assembly includes a cylinder bore disposed on the first side;
wherein the cylinder bore and the flange of the piston are separated by an annular gap, and the deep radius groove is disposed in the annular gap;
wherein the pushrod extends through the piston, the diaphragm, and the cover plate;
an opening formed on the second side and being fluidly connected to a patient's airway for delivering gas thereto; and
wherein the linear coil and linear actuator cooperate to effectuate reciprocation of the diaphragm in a manner to alternately produce positive and negative pressure waves in the gas in the patient's airway.
2. The high frequency oscillating ventilator of claim 1 , wherein the linear actuator has a push rod bore formed axially therethrough and is sized and configured to axially slidably receive the pushrod.
3. The high frequency oscillating ventilator of claim 1 , wherein the linear coil is mounted on the pushrod at an end thereof opposite that from which the piston is mounted.
4. The high frequency oscillating ventilator of claim 1 , wherein the cover plate comprises a lip formed about a peripheral edge thereof and wherein the lip is formed complementary to the piston flange such that the diaphragm is captured in a manner that limits flexing of the diaphragm to the deep radius groove.
5. The high frequency oscillating ventilator of claim 3 , wherein the groove is configured to be non-inverting during reciprocation of the piston.
6. The high frequency oscillating ventilator of claim 1 , wherein the diaphragm is replaceable and directly affixed to the piston during reciprocation thereof.
7. The high frequency oscillating ventilator of claim 1 , wherein the housing assembly includes at least one ventilation port formed in the first side.
8. The high frequency oscillating ventilator of claim 7 , wherein the linear actuator includes at least one aperture formed therethrough for ventilating the linear coil.
9. A high frequency oscillating ventilator, comprising:
a housing assembly;
a disk-shaped piston operatively engaged to a linear actuator assembly and having a disk-shaped diaphragm affixed directly to the piston, the piston comprising a flange that extends around a peripheral edge thereof;
a disk-shaped cover plate;
said diaphragm (i) sealingly dividing the housing assembly into first and second sides, and (ii) comprising a deep radius groove formed about a periphery thereof, the diaphragm being captured between the piston and the cover plate;
wherein the housing assembly includes a cylinder bore disposed on the first side;
wherein the cylinder bore and the flange of the piston are separated by an annular gap and the deep radius groove is disposed in the annular gap;
a pushrod that extends through the piston, the diaphragm, and the cover plate;
said linear actuator assembly contained within the first side, the deep radius groove of the diaphragm forming a rolling portion that rolls along the flange of the piston as the piston moves; and
an opening formed on the second side and being fluidly connected to a patient's airway for delivering gas thereto,
wherein the linear actuator assembly is configured to effectuate reciprocation of the piston and diaphragm in a manner to alternately produce positive and negative pressure waves in the gas in the patient's airway.
10. The high frequency oscillating ventilator of claim 9 , wherein the cover plate comprises a lip formed about a peripheral edge thereof and wherein the lip is formed complementary to the piston flange such that the diaphragm is captured in a manner that limits flexing of the diaphragm to the deep radius groove.
11. The high frequency oscillating ventilator of claim 9 , wherein:
the housing assembly includes a cone cover; and
the diaphragm and cone cover collectively enclose the second side.
12. The high frequency oscillating ventilator of claim 11 , wherein the cone cover is configured to be removably attached to the housing assembly.
13. The high frequency oscillating ventilator of claim 9 , wherein the housing assembly includes at least one ventilation port formed in the first side for cooling the actuator assembly.
14. A high frequency oscillating ventilator, comprising:
a housing assembly;
a linear actuator fixedly mounted within the housing assembly;
a linear coil coaxially disposed within the linear actuator and having a pushrod extending axially therethrough for axially slidably supporting the linear coil on the linear actuator;
a disk-shaped piston mounted on an end of the pushrod;
a disk-shaped cover plate;
a disk-shaped diaphragm captured between the piston and the cover plate and sealingly dividing the housing assembly into first and second sides, the diaphragm having a deep radius groove formed about a periphery thereof the groove defining, at least in part, a rolling portion that rolls along a flange extending around the periphery of said piston with movement of the piston;
wherein the housing assembly includes a cylinder bore disposed on the first side;
wherein the cylinder bore and the flange of the piston are separated by an annular gap and the deep radius groove is disposed in the annular gap;
wherein the pushrod extends through the piston, the diaphragm, and the cover plate;
said linear actuator contained within the first side;
wherein the piston is operatively engaged to the linear actuator and having the diaphragm affixed directly thereto; and
an opening formed on the second side and being fluidly connected to a patient's airway for delivering gas thereto,
wherein:
the linear actuator is configured to effectuate reciprocation of the piston and diaphragm in a manner to alternately produce positive and negative pressure waves in the gas in the patient's airway,
the groove is configured to be non-inverting during reciprocation of the piston and the groove covers a portion of the periphery of the piston.
15. The high frequency oscillating ventilator of claim 14 , wherein:
the groove is sized and configured complementary to the cylinder bore.
16. The high frequency oscillating ventilator of claim 15 , wherein the cover plate comprises a lip formed about a peripheral edge thereof and wherein the lip is formed complementary to the piston flange such that the diaphragm is captured in a manner that limits flexing of the diaphragm to the deep radius groove.
17. The high frequency oscillating ventilator of claim 14 , wherein:
the housing assembly includes a cone cover; and
the diaphragm and cone cover collectively enclose the second side.
18. The high frequency oscillating ventilator of claim 17 , wherein the cone cover is configured to be removably attached to the housing assembly.
19. The high frequency oscillating ventilator of claim 14 , wherein the housing assembly includes at least one ventilation port formed in the first side for cooling the actuator assembly.