Patent ID: 8226583

Claim:
An air pulse generator for providing a high frequency chest wall oscillation therapy to a patient, the air pulse generator comprising: a housing, and an air pulse assembly coupled to the housing, the air pulse assembly having a first diaphragm and a second diaphragm, a first driver operable to move the first diaphragm, a second driver operable to move the second diaphragm, wherein the first and second drivers are operated to move the first and second diaphragms reciprocally in opposite directions toward and away from each other to produce oscillatory pressure pulses, a first coil spring arranged to bias the first diaphragm away from a first portion of the housing and toward the second diaphragm, and a second coil spring arranged to bias the second diaphragm away from a second portion of the housing and toward the first diaphragm, the first and second coil springs being elements that are separate and distinct from the first and second diaphragms, the first and second diaphragms each comprising a resiliently flexible seal having an outer periphery secured to the housing and forming a substantially fluid tight seal therewith.