Patent ID: 7367426

Claim:
An oil extraction apparatus for extracting oil from an engine, the oil extraction apparatus comprising: a pump assembly operationally coupled to a power source of a vehicle such that the power source supplies power to said pump assembly to actuate said pump assembly, an inlet port assembly operationally coupled to said pump assembly such that said pump assembly is in fluid communication with said inlet port assembly, said inlet port assembly in fluid communication with an oil pan of the vehicle, said pump assembly drawing oil from the oil pan of the vehicle through said inlet port assembly when said pump assembly is actuated, an outlet port assembly coupled to said pump assembly such that said pump assembly is in fluid communication with said outlet port assembly, said outlet port assembly in fluid communication with a disposal container, said pump assembly forcing oil drawn through said inlet port assembly through said outlet port assembly to be deposited in the disposal container for disposal of the oil, an inlet valve member restricting oil drawn through the inlet port assembly when said pump assembly is forcing oil through said outlet port assembly, said inlet valve permitting oil to be drawn through said inlet port assembly when said pump assembly is drawing oil from the oil pan of the vehicle, and an outlet valve member restricting oil expelled through the outlet port assembly when said pump assembly is drawing oil through said inlet port assembly, said outlet valve permitting oil to be expelled through said outlet port assembly when said pump assembly is expelling oil from said pump assembly; wherein both the inlet valve member and the outlet valve member have a trapezoidal cross-sectional configuration.