Patent ID: 6514047
Filing Date: 2003-02-04
Classification: F04B

Abstract:
A pump for compressing a fluid comprising:a pump head comprising, a compression chamber comprising a wall having a geometry defining a partial enclosure with an opening and a flexible diaphragm rigidly connected at an outer perimeter of the opening of the wall, the diaphragm having a flexible portion capable of moving with respect to the outer perimeter between a plurality of first positions and a plurality of second positions, the wall and the diaphragm in the first positions and second positions defining first and second volumes of said compression chamber; a suction port connected in communication with the compression chamber for flowing a fluid into the compression chamber; a discharge port connected in communication with the compression chamber for flowing the fluid out of the compression chamber; a fluid spring comprising the fluid within said compression chamber subject to varying pressure and flow conditions; a mechanical spring comprising said diaphragm; a motor having a moving portion being operatively connected to the diaphragm for oscillating the diaphragm at a drive frequency for compressing the fluid, a combined moving mass of said diaphragm and said moving portion, and said mechanical spring and said fluid spring defining a mass-spring mechanical resonance frequency greater than the drive frequency.