Drain valve
First Claim
1. A drain valve comprising, in combination:
- a tubular housing assembly comprising;
a threaded section for threading said tubular housing assembly into a drain hole,a cylindrical section and a polygonal nut section located between the threaded section and the cylindrical section,a first bore of a first diameter and a second bore, axially aligned with said first bore, of a second diameter larger than said first diameter, a junction of said first bore and said second bore forming a shoulder;
a valve stem assembly comprising;
a valve stem having an outer diameter slidably engaging the first bore of said tubular housing assembly, said valve stem comprising;
a closed end having a first annular groove for reception of a C-clip and second annular groove for reception of a first O-ring, said first and second annular grooves being formed in the outer circumference of the closed end of said valve stem, an open end,a drainage bore extending from said open end to said closed end, anda pair of diametrically opposed inlets adjacent said closed end for permitting fluid external to said valve stem to pass into said drainage bore;
an actuator having a small diameter bore, said valve stem being press fit into said small diameter bore in order for the valve stem to be joined with the actuator to form the valve stem assembly, and a large diameter bore slidably engaging an outer diameter of the cylindrical section of said tubular housing assembly; and
a compression spring slidably disposed over said valve stem and further disposed between said shoulder of said tubular housing assembly and said actuator, said compression spring providing a force for closing said drain valve by axially urging said actuator away from said cylindrical section.
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Accused Products
Abstract
A drain valve for replacement of drain plugs or drain valves to facilitate the quick drainage of fluid from an equipment. The drain valve has a tubular housing assembly having a threaded section to be threaded into a threaded drain hole and a hexagonal nut section for assisting in mounting or removing the tubular housing assembly to threaded into or from the drain hole. A valve stem assembly has a valve stem which extends through the tubular housing assembly and has an actuator which an operator can push to open the drain valve. A compression spring disposed between the valve stem assembly and the tubular housing assembly provides a force on the actuator to force the drain valve into a closed position. Inlets in the valve stem permit fluid to flow through a drainage bore in the valve stem when the drain valve is in the open position.
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Citations
23 Claims
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1. A drain valve comprising, in combination:
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a tubular housing assembly comprising; a threaded section for threading said tubular housing assembly into a drain hole, a cylindrical section and a polygonal nut section located between the threaded section and the cylindrical section, a first bore of a first diameter and a second bore, axially aligned with said first bore, of a second diameter larger than said first diameter, a junction of said first bore and said second bore forming a shoulder; a valve stem assembly comprising; a valve stem having an outer diameter slidably engaging the first bore of said tubular housing assembly, said valve stem comprising; a closed end having a first annular groove for reception of a C-clip and second annular groove for reception of a first O-ring, said first and second annular grooves being formed in the outer circumference of the closed end of said valve stem, an open end, a drainage bore extending from said open end to said closed end, and a pair of diametrically opposed inlets adjacent said closed end for permitting fluid external to said valve stem to pass into said drainage bore; an actuator having a small diameter bore, said valve stem being press fit into said small diameter bore in order for the valve stem to be joined with the actuator to form the valve stem assembly, and a large diameter bore slidably engaging an outer diameter of the cylindrical section of said tubular housing assembly; and a compression spring slidably disposed over said valve stem and further disposed between said shoulder of said tubular housing assembly and said actuator, said compression spring providing a force for closing said drain valve by axially urging said actuator away from said cylindrical section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A drain valve comprising, in combination:
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a tubular housing assembly comprising; a threaded section for threading said tubular housing assembly into a drain hole, a cylindrical section and a polygonal nut section located between the threaded section and the cylindrical section, a first bore of a first diameter and a second bore, axially aligned with said first bore, of a second diameter larger than said first diameter, a junction of said first bore and said second bore forming a shoulder; a valve stem assembly comprising; an actuator having a small diameter bore forming an opening through which fluid is drained, and a large diameter bore slidably engaging an outer diameter of the cylindrical section of said tubular housing assembly; and a valve stem having an outer diameter slidably engaging the first bore of said tubular housing assembly, said valve stem comprising; a closed end having a first annular groove for reception of a C-clip and second annular groove for reception of a first O-ring, said first and second annular grooves being formed in the outer circumference of said closed end of said valve stem, a drainage bore extending from said closed end through said small diameter bore forming said opening in said actuator, said actuator and said valve stem being machined as one integral, monolithic component, and a pair of diametrically opposed inlets located adjacent to said closed end for permitting fluid external to said valve stem to pass into said drainage bore; and a compression spring slidably disposed over said valve stem and further disposed between said shoulder of said tubular housing assembly and said actuator, said compression spring providing a force for closing said drain valve by axially urging said actuator away from said cylindrical section. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A drain valve comprising, in combination:
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a tubular housing assembly comprising; a threaded section for threading said tubular housing assembly into a drain hole, a cylindrical section and a polygonal nut section located between the threaded section and the cylindrical section, a first bore of a first diameter and a second bore, axially aligned with said first bore, of a second diameter larger than said first diameter, a junction of said first bore and said second bore forming a shoulder; a valve stem assembly comprising; an actuator having a small diameter bore forming an opening through which fluid is drained, and a large diameter bore with which an outer diameter of the cylindrical section of said tubular housing assembly is slidably engaged; and a valve stem having an outer diameter which slidably engages the first bore of said tubular housing assembly, said valve stem comprising; a closed end having a first annular groove for reception of a C-clip and second annular groove for reception of a first O-ring, said first and second annular grooves being formed in the outer circumference of said closed end of said valve stem, a drainage bore extending from said closed end through said small diameter bore forming said opening in said actuator, and a pair of diametrically opposed inlets adjacent to said closed end for permitting fluid external to said valve stem to pass into said drainage bore; and a compression spring slidably disposed over said valve stem and further disposed between said shoulder of said tubular housing assembly and said actuator, said compression spring providing a force for closing said drain valve by axially urging said actuator away from said cylindrical section. - View Dependent Claims (22, 23)
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Specification