Drain cock of engine oil pan for vehicle

Abstract

A drain cock for an engine oil pan that can prevent the engine oil from leaking due to the wear and tear of a screw thread on the drain cock, the drain cock includes a drain hole established on the bottom of the engine oil pan, a receptacle for exchanging engine oil attached to open and close the drain hole, an insertion for exchanging engine oil inserted in or drawn out of the receptacle in a sliding fashion, a bolt and a spring established inside the insertion, and a nut cap for opening and closing oil, connected to the bottom of the bolt, for opening and closing the drain hole.

1 . A drain cock of an engine oil pan for a vehicle, comprising:
 a drain hole defined in a bottom of the engine oil pan;   a receptacle for exchanging engine oil attached to open and close the drain hole;   an insertion for exchanging engine oil inserted in or drawn out of the receptacle in a drawer type;   a bolt and a spring received inside the insertion; and   a nut cap for opening and closing the drain hole, connected to the bottom of the bolt.   
   
   
       2 . The drain cock of an engine oil pan for a vehicle as recited in  claim 1 , wherein a rubber gasket is attached to a bottom of the nut cap to prevent oil leakage. 
   
   
       3 . The drain cock of an engine oil pan for a vehicle as recited in  claim 1  or  2 , wherein the receptacle includes three walls defining an open side for receiving the insertion therein, and an opening portion provided on a top of the receptacle for facing the bottom of the engine oil pan, through which a portion of the insertion protrudes. 
   
   
       4 . The drain cock of an engine oil pan for a vehicle as recited in  claim 3 , wherein the insertion comprises a first insertion and a second insertion, a bolt is inserted into the first insertion, a spring is inserted between the bolt and the nut cap, and a guide hole is formed in the second insertion, through which the nut cap moves in the up and down direction to open and close the drain hole. 
   
   
       5 . The drain cock of an engine oil pan for a vehicle as recited in  claim 1  or  2 , wherein a projection is established on the bottom of the nut cap and, if the bolt is unwound, the nut cap is inserted along with the guide hole into the drain hole by the elastic force of the spring so that the bottom of the nut cap presses the drain hole and the projection is inserted into the drain hole. 
   
   
       6 . A drain cock for an engine oil, pan, comprising:
 a mounting bracket configured and dimensioned to be secured to an oil pan adjacent an oil drain hole;   a sealing block configured and dimensioned to be received in said bracket over the oil pan, said block defining a black hole therethrough to be aligned with the oil drain hole;   a sealing member slideably received in said block hole with an end configured to meet with an seal the drain hole; and   a biasing element acting between said sealing block and said sealing member to selectively seal the drain hole.   
   
   
       7 . The drain cock of  claim 6 , wherein the biasing element is a compression spring and said sealing block includes a screw mechanism for retracting the sealing member against the spring and out of the drain hole. 
   
   
       8 . The drain cock of  claim 6 , wherein the sealing member has a cylindrical protrusion surrounded by a shoulder, said protrusion being sized to be received in the drain hole.