Patent ID: 8038633

Claim:
An air pulse generator for providing a high frequency chest wall oscillation therapy to a patient, the air pulse generator comprising: a housing; a first diaphragm and a second diaphragm supported in the housing; and a crankshaft assembly coupled to the first and second diaphragms to reciprocally move the diaphragms back and forth to produce oscillating pressure pulses, the crank shaft assembly having a motor with an output shaft that rotates about a first axis, a flywheel mounted on the shaft to rotate therewith about the first axis, a first member coupled to the first diaphragm and pinned to the flywheel by a first stub shaft that is offset from the first axis, a second member coupled to the second diaphragm, a cam interposed between the first member and the second member, the first member being pinned to the cam by the first stub shaft, the second member being pinned to the cam by a second stub shaft.