Patent ID: 9427540
Filing Date: 2016-08-30
CPC Classification: A61M,F04B

Claim Text:
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.