Oil drainage coupler

An oil drainage system for draining oil from an engine to an external container, including

• an oil drainage coupler for engaging an oil pan to facilitate drainage of oil from within the interior of said pan, the coupler including;
• a fitting for attachment to a conduit for passage of oil, the fitting including (a) an axial bore therethrough with an opening about an exterior end of the fitting for passage of oil through the fitting to said conduit, (b) an axial projection projecting from and positioned about said exterior end for opening a valve assembly in an associated plug, said axial projection extending beyond said opening to form a passage for oil about an exterior of said axial projection through said opening, (c) a lateral projection integral with said axial projection, projecting from and positioned about the exterior of said bore for coupling to said associated plug and (d) a sealant means about an exterior surface of the fitting for providing a sealant to oil when the fitting is coupled to an associated plug;
• a plug for engaging an opening within an oil pan and for extending between the exterior of said pan to the interior of said pan, the plug including (e) a valve assembly including biasing means in which a valve is biased into a valve seat to close the valve assembly when the plug is not coupled to the fitting, said valve seat providing an opening for passage of oil when said valve is removed away from said valve seat by said axial projection, with said passage being through said valve seat to said exterior of said axial projection, (f) a shell encompassing said valve assembly about said valve seat, an opening in a lateral wall of said shell to allow passage of oil from said pan to said seat, (g) a cylindrical hollow body having a set of exterior helical threads adapted to thread into a set of threads in a wall of said opening of said oil pan having a first diameter D, and for providing a seal between the plug and said oil pan and (h) a head engaged to said cylindrical body for extending to the exterior of said pan and for positioning in abuttment with said pan about said opening, said head and cylindrical body having formed therethrough a coupling cavity extending to said bore, said cavity being encircled by a side wall in which is formed a first groove intersected by at least one lateral projecting slot through which said lateral projection of the fitting can pass and be rotated into said first groove to couple the fitting to the plug such that said axial projection is postioned collinear with the axis of said helical threads and such that, when the plug is coupled to the fitting, said axial projection urges the valve away from said seat without contacting other portions of the plug and providing for a spacing for passage of oil through said seat and for providing a spacing between said exterior of said axial projection and said cylindrical body, whereby oil may pass through said seat, about said exterior of said axial projection within said cylindrical body and then through said opening to said bore and plugs of various diameters D can couple to the same fitting and provide for a sealed passageway of oil from the interior of said pan to said conduit, thereby enabling a common fitting to be used with various sizes of the plug without limiting the rate of flow of oil through the plug to that of the smallest diameter plugs;
• a pump having a first quick-coupler connection at an inlet of the pump for coupling to a first hose and having a second quick-coupler connection at an outlet of the pump for coupling to a second hose;
• a first hose coupled to said first quick-coupler and to the fitting;
• and
• a second hose coupled to the second quick-coupler connection and extending to an external oil container.

An oil drainage system for draining oil from an engine to an external container, including

• an oil drainage coupler for engaging an oil pan to facilitate drainage of oil from within the interior of said pan, the coupler including,
• a fitting for attachment to a conduit for passage of oil, the fitting including an axial bore therethrough with an opening extending from said bore to the exterior of the fitting for passage of oil through the fitting to said conduit, an axial projection for opening a valve assembly in an associated plug, a lateral projection for coupling to said associated plug, and a sealant means about an exterior surface of the fitting for providing a sealant to oil when the fitting is coupled to an associated plug;
• a plug for engaging an opening within an oil pan and for extending between the exterior of said pan to the interior of said pan, the plug including a valve assembly including biasing means in which a valve is biased into a valve seat to close the valve assembly when the plug is not coupled to the fitting, said valve seat providing an opening for passage of oil when said valve is removed from said valve seat by said axial projection, a shell encompassing said valve assembly without said valve seat, an opening in a lateral wall to said shell to allow passage of oil from said pan to said seat, a body having a set of exterior helical threads adapted to thread into a set of threads in a wall of said opening of said oil pan having a first diameter D.sub.1, and for providing a seal between the plug and said oil pan and a head for extending to the exterior of said pan, and for positioning in abuttment with said pan about said opening, said head having formed therethrough a coupling cavity extending to said bore, said cavity being encircled by a side wall in which is formed a first groove intersected by at least one laterally projecting slot through which said lateral projection of the fitting can pass and be rotated into said first groove to couple the fitting to the plug such that said axial projection is positioned collinear with the axis of said helical threads and such that, when the plug is coupled to the fitting, said axial projection urges the valve away from said seat without contacting other portions of the plug and providing for a spacing for passage of oil through said seat to said axial bore and said head interfaces with said sealant means, whereby plugs of various diameters D.sub.1 can couple to the same fitting, and provide for a sealed passageway of oil from the interior of said pan to said conduit, thereby enabling a common fitting to be used with various sizes of the plug without limiting the rate of flow of oil through the plug to that of the smallest diameter plugs;
• a pump having a first quick-coupler connection at an inlet of the pump for coupling to a first hose and having a second quick-coupler connection at an outlet of the pump for coupling to a second hose;
• a first hose coupled to said first quick-coupler and to the fitting;
• a second hose coupled to the second quick-coupler connection and extending to an external oil container;
• and
• a bushing connected to the first hose and to the fitting, the bushing being seated within the fitting and the first hose being seated within the bushing, the bushing including a ridge resting on a ledge within the fitting and including tines whereby the bushing is readily rotatable relative to the fitting and said tines oppose axial movement of the first hose relative to the fitting.