1. An apparatus for applying a lubrication layer onto hard disks, comprising:
a lubrication tank being adapted to hold a lubricant bath;
a disk holding means being adapted to hold a plurality of hard disks, each said hard disk being disposed at a corresponding location along a length of said disk holding means; and
a plurality of projecting members, each said projecting member being disposed within said tank and adapted to be disposed between an adjacent pair of said plurality of hard disks, to interrupt a substantial portion of surface waves of said lubricant bath that travel between said adjacent pair of hard disks.
2. An apparatus for applying a lubrication layer onto hard disks as described in claim 1, wherein each of said projecting members are disposed at the surface of said lubricant bath.
3. An apparatus for applying a lubrication layer onto hard disks as described in claim 1, wherein said plurality of projecting members are integrally formed within a bath cover that is disposed to position said projecting members at a surface of said lubricant bath.
4. An apparatus for applying a lubrication layer onto hard disks as described in claim 3, wherein said bath cover comprises a generally rectangular integrally formed member having a central mandrel passage slot formed therethrough and a plurality of disk passage slots formed therethrough generally perpendicularly to said mandrel passage slot.
5. An apparatus for applying a lubrication layer onto hard disks as described in claim 1 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are irregularly shaped to diminish reflection of said surface waves from said projecting members.
6. An apparatus for applying a lubrication layer onto hard disks as described in claim 1 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are formed of a porous material to diminish reflection of said surface waves from said projecting members.
7. A hard disk, comprising:
an outer surface of the hard disk;
a lubrication layer being disposed on said outer surface, wherein said lubrication layer is substantially free of thickness variations caused by surface waves.
8. A hard disk as described in claim 7, wherein said lubrication layer is formed by a process comprising:
lowering a plurality of hard disks into a lubricant bath;
removing said hard disks from the lubricant bath; and
substantially intercepting surface waves within said lubricant bath, said intercepting of said surface waves occurring before said surface waves reach another of said hard disks.
9. A hard disk as described in claim 8 wherein said substantially intercepting of said surface waves is accomplished by disposing a wave intercepting member upon said surface of said lubricant bath between adjacent ones of said plurality of hard disks.
10. A hard disk as described in claim 9, wherein said wave intercepting member includes a plurality of projecting members that are integrally formed within a bath cover that is disposed to position said projecting members at said surface of said lubricant bath.
11. A hard disk as described in claim 10, wherein said bath cover comprises a generally rectangular member having a central mandrel passage slot formed therethrough and a plurality of disk passage slots formed therethrough generally perpendicularly to said mandrel passage slot.
12. A hard disk as described in claim 10 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are irregularly shaped to diminish reflection of said surface waves from said projecting members.
13. A hard disk as described in claim 10 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are formed of a porous material to diminish reflection of said surface waves from said projecting members.
14. A process for applying a lubrication layer onto an outer surface of a hard disk, comprising:
lowering a plurality of hard disks into a lubricant bath;
removing said hard disks from the lubricant bath; and
substantially intercepting surface waves within said lubricant bath, said intercepting of said surface waves occurring before said surface waves reach another of said hard disks.
15. A hard disk as described in claim 14 wherein said substantially intercepting of said surface waves is accomplished by disposing a wave intercepting member upon said surface of said lubricant bath between adjacent ones of said plurality of hard disks.
16. A process for applying a lubrication layer onto an outer surface of a hard disk as described in claim 15, wherein said wave intercepting member includes a plurality of projecting members that are integrally formed within a bath cover that is disposed to position said projecting members at said surface of said lubricant bath.
17. A process for applying a lubrication layer onto an outer surface of a hard disk as described in claim 16, wherein said bath cover comprises a generally rectangular member being defined by outer edges thereof, and having a central mandrel passage slot formed therethrough and a plurality of disk passage slots formed generally perpendicularly to said mandrel passage slot.
18. A process for applying a lubrication layer onto an outer surface of a hard disk as described in claim 16 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are irregularly shaped to diminish reflection of said surface waves from said projecting members.
19. A process for applying a lubrication layer onto an outer surface of a hard disk as described in claim 16 wherein said projecting members include side surfaces for making contact with said surface waves, and wherein said side surfaces are formed of a porous material to diminish reflection of said surface waves from said projecting members.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A reductant delivery unit for selective catalytic reduction (SCR) after-treatment for vehicles in combination with an exhaust boss, the combination comprising:
a reductant delivery unit comprising:
a fluid injector having an inlet and an outlet, the inlet being constructed and arranged to receive a source of urea solution, and
a flange coupled with the fluid injector,
an exhaust boss separate from the flange and having a surface defining a through-hole constructed and arranged to communicate with a vehicle’s exhaust flow path, the flange being coupled to a planar mounting surface of the exhaust boss such that the outlet of the fluid injector communicates with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path,
a gasket sandwiched between the flange and the planar mounting surface of the exhaust boss, the gasket having a surface defining a through-hole therein that communicates with the through-hole in the exhaust boss to permit the urea solution to pass from the outlet to the exhaust flow path, with the outlet of the fluid injector being upstream of the through-holes, and
gasket shielding structure separate from the flange and engaged with and covering the surface defining the through-hole in the gasket so that the urea solution may contact the gasket shielding structure, with the gasket shielding structure preventing the urea solution from contacting the gasket.
2. The combination of claim 1, wherein gasket shielding structure comprises an annular protrusion associated with the exhaust boss.
3. The combination of claim 2, wherein the protrusion extends generally transversely with respect to the mounting surface of the exhaust boss.
4. The combination of claim 3, wherein the protrusion is part of the exhaust boss and defines the surface defining the through-hole in the exhaust boss.
5. The combination of claim 1, wherein the gasket shielding structure comprises a metal eyelet having a portion received in the though-hole of the gasket.
6. The combination of claim 5, wherein the eyelet is secured to the gasket by a crimp connection.
7. A reductant delivery unit for selective catalytic reduction (SCR) after-treatment for vehicles in combination with an exhaust boss, the combination comprising:
a reductant delivery unit comprising:
a fluid injector having an inlet and an outlet, the inlet being constructed and arranged to receive a source of urea solution, and
a flange coupled with the fluid injector,
an exhaust boss separate from the flange and having a surface defining a through-hole constructed and arranged to communicate with a vehicle’s exhaust flow path, the flange being coupled to a planar mounting surface of the exhaust boss such that the outlet of the fluid injector communicates with the exhaust flow path so as to control injection of urea solution into the exhaust gas flow path,
means for sealing, sandwiched between the flange and the planar mounting surface of the exhaust boss, the means for sealing having a surface defining a through-hole therein that communicates with the through-hole in the exhaust boss to permit the urea solution to pass from the outlet to the exhaust flow path, with the outlet of the fluid injector being upstream of the through-holes, and
means for shielding, separate from the flange and engaged with and covering the surface defining the through-hole in the means for sealing so that the urea solution may contact the means for shielding, with the means for shielding preventing the urea solution from contacting the means for sealing.
8. The combination of claim 7, wherein means for sealing is a gasket.
9. The combination of claim 7, means for shielding comprises an annular protrusion associated with the exhaust boss.
10. The combination of claim 9, wherein the protrusion extends generally transversely with respect to the mounting surface of the exhaust boss.
11. The combination of claim 10, wherein the protrusion is part of the exhaust boss and defines the surface defining the through-hole in the exhaust boss.
12. The combination of claim 7, wherein the means for shielding comprises a metal eyelet having a portion received in the though-hole of the means for sealing.
13. The combination of claim 12, wherein the eyelet is secured to the gasket by a crimp connection.
14. A method of preventing urea solution deposit build-up on a gasket disposed between a reductant delivery unit and an exhaust boss of selective catalytic reduction after-treatment system for vehicles, the method comprising:
providing a gasket sandwiched between a planar mounting surface of an exhaust boss and a flange of a reductant delivery unit (RDU), the exhaust boss being separate from the flange, the gasket having a surface defining a through-hole therein, the exhaust boss having a surface defining a through-hole in communicating with a vehicle’s exhaust flow path and in communication with the through-hole in the gasket, with the outlet of the fluid injector being upstream of the through-holes, and
providing gasket shielding structure, which is separate from the flange, to be engaged with and covering the surface defining the through-hole in the gasket so that urea solution sprayed from the RDU and into the exhaust flow path may contact the gasket shielding structure, with the gasket shielding structure preventing the urea solution from contacting the gasket.
15. The method of claim 14, wherein the step of providing the gasket shielding structure provides an annular protrusion associated with the exhaust boss.
16. The method of claim 15, wherein the protrusion extends generally transversely with respect to the mounting surface of the exhaust boss.
17. The method of claim 16, wherein the protrusion is part of the exhaust boss and defines the surface defining the through-hole in the exhaust boss.
18. The method of claim 14, wherein the step of providing the gasket shielding structure provides a metal eyelet having a portion received in the though-hole of the gasket.
19. The method of claim 18, further comprising crimping the eyelet to the gasket to secure the eyelet to the gasket.