Patent ID: 7004206
Filing Date: 2006-02-28
Classification: B62D,F01M

Abstract:
1. A method for exchanging a circulating fluid of a hydraulic system with a reservoir with a return port for receiving said fluid for pressure dissipation and a supply port for delivering said fluid after said pressure dissipation, a fluid pump providing negative pressure to said fluid to deliver said fluid into an inlet port while simultaneously providing positive pressure to said fluid to deliver said fluid through an outlet port, and a mechanism with a working port for receiving said fluid for actuation and a discharge port for discharging said fluid after said actuation, a supply conduit connecting said supply port to said inlet port, a working conduit connecting said outlet port to said working port, a return conduit connecting said discharge port to said return port, said method comprising steps of: providing a fresh fluid reservoir providing a used fluid receiver providing a fresh fluid exchange conduit providing a used fluid exchange conduit providing an adequate supply of fresh fluid to the fresh fluid reservoir emptying the used fluid receiver of used fluid turning off the engine of the vehicle to render the power steering pump inoperative connecting the fresh fluid exchange conduit to fluidly communicate with the supply conduit connecting the used fluid exchange conduit to fluidly communicate with the return conduit starting the engine of the vehicle to render the power steering pump operative providing a fluid control valve which is controlled by a float which when placed in its first position connects the fresh fluid exchange conduit to the fresh fluid reservoir and connects the used fluid exchange conduit to the used fluid receiver, and when placed in its second position connects the used fluid exchange conduit to the fresh fluid exchange conduit while disconnecting the fresh fluid reservoir from the fresh fluid exchange conduit and disconnecting the used fluid receiver from the used fluid exchange conduit.