Patent ID: 6106238
Filing Date: 2000-08-22
Classification: F04B

Abstract:
A method of detecting gas in a fluid transported through a fluid delivery system comprising a first pump having a first piston actuating in a first direction and a second direction within a first piston chamber and a second pump head having a second piston actuating in a first direction and a second direction within a second piston chamber, said first pump head receiving said fluid and pressurizing said fluid to form a pressurized fluid and said second pump head receiving said pressurized fluid from said first pump head, comprising the steps of:monitoring a compression of said pressurized fluid compressed by said first piston within said first piston chamber to determine a compression value;monitoring a decompression of said pressurized fluid within said first piston chamber to determine a decompression value;determining a compression to decompression ratio;adjusting a stroke length of at least said first piston based on said compression to decompression ratio.