Patent ID: 6360791
Filing Date: 2002-03-26
Classification: F01M,F01P

Abstract:
A service apparatus for replacing a first fluid in a system, having an inlet and an outlet, with a second fluid, said service apparatus comprising:a first hose capable of being connected to said inlet; a second hose capable of being connected to said outlet; a first pump connected to said first hose; a fluid exchange mode, wherein said first pump is active in said fluid exchange mode and pumps said second fluid through said first hose to said inlet, and said first fluid exits said outlet and said second hose; and a by-pass mode, wherein said first pump is inactive in said by-pass mode and said system pumps out said second fluid out of said outlet, said second hose directs said second fluid to said first hose and said second fluid enters said inlet; wherein said service apparatus enters said by-pass mode automatically after exiting said fluid exchange mode.