Patent ID: 6450294
Filing Date: 2002-09-17
Classification: F01M

Abstract:
An oil replacement assembly comprising a housing in which a plurality of circuits and gauges are incorporated therein, said circuits generally including a 9-way valve, a first connecting port of said 9-way valve being connected to a first 3-way valve, while a third connecting port of said 9-way valve being connected with a sieve, a first gauge and a 4-way valve being connected to said sieve in series, a cylinder being connected to said first 3-way valve, another port of said first 3-way valve being connected to a second 3-way valve, a third 3-way valve, a second gauge, a fourth 3-way valve, an oil tank, a fifth 3-way valve, a first one-way valve, and to an waste tank, wherein said second 3-way valve is connected to said cylinder, while said third 3-way valve is connected to a port of said 4-way valve through a second one-way valve, another port of said 4-way valve being connected to a pump;one port of said fifth 3-way valve being connected to a fourth port of said 9-way valve; characterized in that an inner one-way valve is arranged between said first connecting port and a third connecting port of said 9-way valve, while a second inner one-way valve is arranged between said second connecting port and a fourth connecting port of said 9-way valve, an eighth connecting port of said 9-way valve being connected to said first connecting port, and further connected to a dual-3-way valve, said fifth connecting port and said second connecting port being connected to another port of said dual-3-way valve, another port of said dual-3-way valve being connected to a sixth connecting port of said 9-way valve.