초록 ▼

A valve body member (20) is movably accommodated in an oil drain through-hole (14) of a bolt member (11) secured to an oil pan (1), with a valve body (21) of the valve body member (20) being engaged with a valve seat (12a) of the bolt member (11) by means of a spring (30) to constitute a normally-cl

A valve body member (20) is movably accommodated in an oil drain through-hole (14) of a bolt member (11) secured to an oil pan (1), with a valve body (21) of the valve body member (20) being engaged with a valve seat (12a) of the bolt member (11) by means of a spring (30) to constitute a normally-closed valve. The normally-closed valve is opened by forcing the valve body member (20) by an adapter (40) having an oil suction hose (463) connected thereto so that oil is drained off by a negative suction. At the same time, an elongated flexible tube (50) connected to the oil suction tube (463) is inserted from the adapter (40) through an opening of the valve body member (20) into the interior of the pan (1) to drain off the oil remaining on the bottom of the oil pan (1).

대표청구항 ▼

[What is claimed is:] [1.]a bolt member having at one end side thereof a threaded stem fixedly screwed into an oil drain hole of said oil storing vessel, having at the other end side thereof a head positioned outside of said oil storing vessel, having an oil drain passage axially through-formed and

[What is claimed is:] [1.]a bolt member having at one end side thereof a threaded stem fixedly screwed into an oil drain hole of said oil storing vessel, having at the other end side thereof a head positioned outside of said oil storing vessel, having an oil drain passage axially through-formed and extending from said threaded stem to said head, and having a valve seat disposed in said oil drain passage at an end closer to said threaded stem;a movable valve body member having at one end thereof a valve body engageable with said valve seat to close said oil drain passage, said valve body being accommodated within said oil drain passage in such a manner that said valve body is movable toward the interior of said oil storing vessel to disengage said valve seat to open said oil drain passage for draining off oil; anda spring member accommodated within said oil drain passage of said bolt member, said spring member generating a spring force for urging said movable valve body member to engage said valve seat; whereinsaid head of said bolt member is provided with a mounting portion for a jig which moves said movable valve body member against spring force to keep said oil drain passage open, and whereinsaid movable valve body member is formed with a guide surface for allowing an extremity of a flexible oil suction tube inserted through said oil drain passage to be turned in a diagonally lower direction and to be led into the interior of said oil storing vessel when said jig opens said oil drain passage.