Portable car-used oil extracting and tire inflation apparatus with separately disposed oil and air pumps

A portable car-used oil extracting and tire inflation apparatus with separately disposed oil and air pumps, comprising a casing, a motor disposed inside said casing at a middle portion thereof, an oil pump assembly connected to a first eccentric crank member that is connected to an upper rotary shaft of said motor, and an air pump assembly connected to a second eccentric crank member that is connected to a lower rotary shaft of said motor;

• said oil pump assembly being disposed inside said casing at an upper front portion thereof and comprising a first rocker arm of which a rear end is connected to said first eccentric crank member by means of a first eccentric pin, a rear oil piston fixedly connected with said first rocker arm at a front end thereof by means of a first connecting pin and being received in a first cylinder jacket which is coupled with a rear pump body, a piston rod integrally formed In front of said rear oil piston and being received in a second cylinder jacket coupled between said rear pump body and a front pump body, and a front oil piston at a front end of said piston rod also being received in said second cylinder jacket;
• said front pump body having two uniflow valves disposed therein such that oil in a sump can be extracted into and then drained from said front pump body in only one direction;
• said air pump assembly being disposed inside said casing at a lower front portion thereof and comprising a second rocker arm of which a rear end is connected to said second eccentric crank member by means of a second eccentric pin, an air piston fixedly connected with said second rocker arm at a front end thereof by means of a second connecting pin, a third cylinder jacket receiving said air piston therein, and a cylinder cover having an air inflation portion for connecting with an hose for tire inflation;
• wherein said motor respectively turns said first and second eccentric crank member, and said first and second eccentric crank members respectively turn said first and said second rocker arms causing said first and second rocker arms to reciprocate back and forth in a linear motion, so that said oil and said air pump assemblies are actuated to automatically extract oil and inflate a tire, respectively.