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US 6,206,344 B1Granted
Oil drain plug for oil storage vessel and oil drain device using same
OwnerTamotsu Takaharainventor
Life of this patent
Estimating the term…
Abstract
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).
Claims20
An oil drain plug for an oil storing vessel, said oil drain plug comprising:
- 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;
- and
- a 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;
- wherein
- said 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 wherein
- said 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.
4 more elements
An oil drain plug for an oil storing vessel, said oil drain plug comprising:
- 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 anally 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;
- and
- a 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;
- wherein
- said movable valve body member includes an annular or bored disk-like spring seat positioned within said oil drain passage of said bolt member in a region of said head, said spring seat being engaged by said spring member, and a solid-rod-like connecting shaft having a small diameter so as to form a large gap between said connecting shaft and an inner wall surface of said oil drain passage of said bolt member, said connecting shaft serving to connect said spring seat and said valve body.
3 more elements
An oil drain device for an oil storing vessel comprising a combination of:
- a) an oil drain plug comprising 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;
- and a 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;
- b) a valve body pressing jig fitted to said head of said bolt member, said jig being engageable with said movable valve body member to move said valve body towards the interior of the oil storing vessel to disengage said valve seat;
- c) an oil suction hose removably fitted to said valve body pressing jig;
- and
- d) an oil suction tube for inserting, through said oil drain plug with its valve passage opened, into the interior of said oil storing vessel.
4 more elements
Dependencies are inferred from the claim text.