Crankcase drain assembly
OwnerHarry E. Tibbittsinventor
Life of this patent
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Abstract
A crankcase drain assembly comprising a manually operated valve unit mounted in the crankcase drain opening and a disposable container of flexible sheet material connected to the valve unit by a flexible hose member. The valve unit includes a large diameter planetary knob to facilitate manual opening and closing of the drain valve and eliminate the need for separate tools. The valve unit also includes a concave inlet port for seating in the drain opening so its rim area extends no further than level with the crankcase floor, thereby enabling the used crankcase oil to drain completely.
Claims1
A crankcase drain assembly comprising manually operable valve means for mounting in the drain opening of a crankcase, including a body portion for mounting in said drain opening, a central bore through said body portion having an inlet opening comprising an inwardly tapering entrance region, said central bore of said body portion being internally threaded, a valve stem having an externally threaded shank mounted in said central bore of said body portion for cooperative threaded engagement therewith and for movement between an open and closed position upon rotation of said valve stem therein, said valve stem including a tapered head being tapered and dimensioned to seat in said inwardly tapering entrance region of said body portion when said valve stem is in said closed position, a central bore in said valve stem extending from a discharge aperture at the discharge end of said valve stem, inlet means extending through said valve stem opening to its said central bore for communication between the interior of said crankcase and said central bore when said valve stem is in said open position, said valve stem including a discharge spout at said discharge end thereof, said body portion of said valve means including an outwardly directed end portion thereof projecting outwardly from said crankcase when said body portion is mounted therein, a hub-receiving recess formed in said outwardly directed end portion of said body portion, a knob secured to said discharge end of said valve stem for rotation thereof, said knob having a radially projecting portion and an inwardly projecting hub, said inwardly projected hub being receivable in said hub-receiving recess of said body portion when said valve stem is rotated to said open position, a central bore through said hub to receive said discharge end of said valve stem there-through for securing said knob to said valve stem, said inwardly projecting hub including a recess extending inwardly from said radially projecting portion of said knob, said discharge spout of said valve stem extending through said recess of said hub and being spaced from the walls thereof to receive a flexible discharge tube thereon, said inwardly projecting hub surrounding and protecting said discharge spout of said valve stem.
Dependencies are inferred from the claim text.