Patent ID: 6244384
Filing Date: 2001-06-12
Classification: F01M,F16H

Abstract:
A hand held transmission fluid exchanger for connection with the dispenser outlet of on-demand metering head having a meter for indicating the volume of fluid exchanged and comprising:a housing to be suspended from said metering head and including a new fluid passage for connection on an upstream end to said dispenser outlet and on its downstream end with a transmission system inlet location upstream of the transmission pump, said housing further including a used fluid passage for connection on its upstream end with a transmission system outlet location downstream of the transmission pump and on its downstream end with a used fluid storage device;said housing further including a return passage for flow of fluid in the return direction from said used fluid passage to said new fluid passage; anda pressure relief valve device in said return passage operative to, at a predetermined pressure differential between said used fluid passage and new fluid passage, to bypass used fluid to said new fluid passage via said return passage.