Patent ID: 6547749
Filing Date: 2003-04-15
Classification: A61H,F04B

Abstract:
An apparatus for generating air pressure and air pressure pulses in an enclosure comprising: a casing surrounding an air pulsing chamber, means connected to the casing adapted to carry air and air pressure pulses from the air pulsing chamber to the enclosure, said casing having a first opening and a second opening opposite the first opening, a first diaphragm extended across the first opening of the casing, a first cover located over and spaced from the first diaphragm having a first pumping chamber in communication with the first diaphragm, first means securing the first cover and first diaphragm to the casing, a second diaphragm extended across the second opening of the casing, a second cover located over and spaced from the second diaphragm having a second pumping chamber in communication with the second diaphragm, second means securing the second cover and second diaphragm to the casing, said casing having an internal wall separating the pulsing chamber from a manifold chamber, said manifold chamber being in air communication with said first and second pumping chambers, a one-way valve mounted on the internal wall operable to allow air to flow from the manifold chamber into the pulsing chamber and prevent the flow of air from the pulsing chamber back to the manifold chamber, air flow regulating means for restricting the flow of air into and out of the manifold chamber to control the pressure of the air in the manifold chamber, said air flow regulating means including an adjustable member operable to adjust the rate of the flow of air into and out of the manifold chamber thereby regulating the pressure of the air in the manifold chamber, a first motion transmission assembly connected to the first diaphragm operable to linearly move the first diaphragm relative to the pulsing and first pumping chambers, a second motion transmission assembly connected to the second diaphragm operable to linearly move the second diaphragm relative to the pulsing and second pumping chambers, a variable speed motor, power transmission means connecting the motor to the first and second motion transmission assemblies whereby on operation of the motor the first and second motion transmission assemblies linearly reciprocate the first and second diaphragms to pulse air in the pulsing chamber and cause air to flow from the manifold chamber into and out of the first and second pumping chambers and increase the pressure of the air in the manifold chamber, said one-way valve allowing air to flow from the manifold chamber into the pulsing chamber when the pressure of the air in the manifold chamber is greater than the pressure of the air in the pulsing chamber, and a controller connected to the motor operable to vary the speed of the motor to regulate the reciprocating movements of the diaphragms thereby regulating the frequency of the air pulses in the pulsing chamber and enclosure.