Patent ID: 6694976
Filing Date: 2004-02-24
Classification: A61M

Abstract:
An oscillating air pressure generator connected to an air pressure supplier for simultaneously generating a positive pressure and a negative pressure, said oscillating air pressure generator alternately selecting the positive pressure and the negative pressure to output for generating an oscillating air pressure, said oscillating air pressure generator comprising:a frame including a positive pressure input port fed by the positive pressure from the air pressure supplier, a negative pressure input port fed by the negative pressure from the air pressure supplier, an atmospheric port open to the atmosphere, and an output port for outputting the oscillating air pressure; a switching member that selectively switches between a connection state where the positive pressure input port is connected to the output port while the negative pressure input port is connected to the atmospheric port and a connection state where the positive pressure input port is connected to the atmospheric port while the negative pressure input port is connected to the output port; and a drive unit that continuously drives the switching member; wherein the connection between the positive pressure input port and the output port and the connection between the negative pressure input port and the atmospheric port are performed by the switching member such that the connection between the negative pressure input port and the atmospheric port slightly precedes the connection between the positive pressure input port and the output port.