Patent ID: 6062275
Filing Date: 2000-05-16
Classification: F01M,F16H

Abstract:
An apparatus for replacing a first fluid with a second fluid, said apparatus comprising:a first tank for receiving said first fluid from a first port;a second tank with said second fluid;a processor coupled to first and second sensors;a pump coupled to said processor for pumping said second fluid into a second port;wherein said processor performs a first measurement of said first fluid via said first sensor and performs a second measurement of said second fluid via said second sensor, and wherein said processor controls said pump based on said first and second measurements;wherein said ports are connected to a switch having a plurality of paths;wherein said switch is coupled to said processor and said processor controls said paths;wherein said switch has first and second switch ports, said first switch port having a first fluid pressure sensor coupled to said processor and said second switch port having a second fluid pressure sensor coupled to said processor, and wherein said processor measures said first switch port pressure via first fluid pressure sensor, measures said second switch port pressure via second fluid pressure sensor and controls said paths based on said measurements.