Oil drain valve assembly
First Claim
1. An oil drain valve assembly for draining oil from an engine crankcase such as in a small internal combustion engine, comprising:
- an adaptor formed of a first tubular fitting member having an externally threaded male upper end to be received in an internally threaded outlet opening of the engine crankcase and having a first axial bore extending from the upper end to a lower end thereof, said lower end adjacent the first axial bore including an annular valve seat;
outer sleeve assembly formed of a second tubular member having open upper end and a lower end, said second tubular member including an axial passage extending between its open upper end and its lower end, said lower end of said second tubular member being closed by an integral nozzle end cap, said end cap having second axial bore extending therethrough;
said outer sleeve assembly further including a valve subassembly being secured in its lower end thereof, said valve subassembly having a sealing surface and radial passageways disposed below said sealing member and for communicating with said second axial bore;
the opened end of said second tubular member being adapted to telescopingly receive the lower end of said first tubular member so that the sealing surface fits firmly and tightly against the annular valve seat for providing a seal; and
interlocking means formed on the open upper end of said second tubular member and on the exterior surface of said first tubular member for permitting opening of said valve subassembly by rotating and subsequently pulling of said second tubular member relative to said first tubular member so as to cause disengagement of said sealing surface from said annular valve seat thereby permitting oil to flow through said first axial bore, around said sealing surface into said radial passageways and from said second axial bore.
1 Assignment
0 Petitions
Accused Products
Abstract
An oil drain valve assembly is provided for draining oil from an engine crankcase such as in a small internal combustion engine. The drain valve assembly includes an adaptor, an outer sleeve assembly, and interlocking for permitting opening of the valve assembly by relatively limited counter-clockwise rotation and subsequent pulling of the outer sleeve assembly relative to the adaptor. The interlocking means is formed of a pair of diametrically opposed J-slots disposed on the upper end of the outer sleeve assembly and co-mating locking pins disposed on the exterior surface of the adaptor. The locking pins are engageable with detents formed on the J-shaped slots to define a closed or sealed position.
59 Citations
20 Claims
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1. An oil drain valve assembly for draining oil from an engine crankcase such as in a small internal combustion engine, comprising:
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an adaptor formed of a first tubular fitting member having an externally threaded male upper end to be received in an internally threaded outlet opening of the engine crankcase and having a first axial bore extending from the upper end to a lower end thereof, said lower end adjacent the first axial bore including an annular valve seat; outer sleeve assembly formed of a second tubular member having open upper end and a lower end, said second tubular member including an axial passage extending between its open upper end and its lower end, said lower end of said second tubular member being closed by an integral nozzle end cap, said end cap having second axial bore extending therethrough; said outer sleeve assembly further including a valve subassembly being secured in its lower end thereof, said valve subassembly having a sealing surface and radial passageways disposed below said sealing member and for communicating with said second axial bore; the opened end of said second tubular member being adapted to telescopingly receive the lower end of said first tubular member so that the sealing surface fits firmly and tightly against the annular valve seat for providing a seal; and interlocking means formed on the open upper end of said second tubular member and on the exterior surface of said first tubular member for permitting opening of said valve subassembly by rotating and subsequently pulling of said second tubular member relative to said first tubular member so as to cause disengagement of said sealing surface from said annular valve seat thereby permitting oil to flow through said first axial bore, around said sealing surface into said radial passageways and from said second axial bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An oil drain valve assembly for draining oil from an engine crankcase such as in a small internal combustion engine, comprising:
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an adaptor formed of a first tubular fitting member having an externally threaded male upper end to be received in an internally threaded outlet opening of the engine crankcase and having a first axial bore extending from the upper end to a lower end thereof, said lower end adjacent the first axial bore including an annular valve seat; outer sleeve assembly formed of a second tubular member having open upper end and a lower end, said second tubular member including an axial passage extending between its open upper end and its lower end, said lower end of said second tubular member being closed by an integral nozzle end cap, said end cap having second axial bore extending therethrough; said outer sleeve assembly further including a valve subassembly being secured in its lower end thereof, said valve subassembly having a sealing surface and radial passageways disposed below said sealing member and for communicating with said second axial bore; the opened end of said second tubular member being adapted to telescopingly receive the lower end of said first tubular member so that the sealing surface fits firmly and tightly against the annular valve seat for providing a seal; and interlocking means formed on the open upper end of said second tubular member and on the exterior surface of said first tubular member for permitting opening of said valve subassembly by rotating approximately 30°
in the counter-clockwise direction and subsequently pulling downwardly of said second tubular member relative to said first tubular member so as to cause disengagement of said sealing surface from said annular valve seat thereby permitting oil to flow through said first axial bore, around said sealing surface into said radial passageways and from said second axial bore. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification