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US 5,287,989 AGranted
Molded plastic tub
AssigneeTriangle Tool Corporation
InventorLeRoy D. Luther
Life of this patent
Estimating the term…
Abstract
An integrally molded one-piece washing machine tub including an annular sidewall extending upwardly from a bottom wall. The sidewall diverges radially outwardly from the bottom wall and includes a plurality of drain holes recessed in vertically oriented teardrop-shaped depressions to ease separation and removal of the tub from the mold assembly.
Claims13
A one-piece injection molded washing machine tub comprising:
- a plastic bottom wall, and
- a plastic cylindrical sidewall molded integrally with said bottom wall and extending in a transverse direction from said bottom wall, said cylindrical sidewall having therein a plurality of drain holes and including an interior surface, said interior surface including a plurality of teardrop-shaped depressions, each of said drain holes extending from one of said teardrop-shaped depressions so as to be recessed from said interior surface.
An injection molded washing machine tub comprising:
- a plastic bottom wall, and
- a plastic annular sidewall molded integrally with said bottom wall and extending in an axial direction from said bottom wall, said sidewall diverging radially outwardly in said axial direction to facilitate removal of said tub from a mold assembly, said sidewall including an interior surface, said interior surface including a plurality of depressed surface portions, each of said depressed surface portions being elongated in said axial direction, each of said depressed surface portions including a first end portion and a second end portion spaced from said first end portion in said axial direction, and each of said depressed surface portions becoming shallower in said axial direction from said first end portion thereof to said second end portion thereof, and said sidewall having therein a plurality of drain holes, each of said drain holes extending from one of said depressed surface portions so as to be recessed from the surrounding interior surface.
An injection molded washing machine tub comprising:
- a plastic bottom wall, and
- a plastic annular sidewall molded integrally with said bottom wall and extending in an axial direction from said bottom wall, said sidewall having therein a plurality of drain holes and including an interior surface, said interior surface including a plurality of teardrop-shaped depressed surface portions, each of said teardrop-shaped depressed surface portions being elongated in said axial direction, each of said teardrop-shaped depressed surface portions including an enlarged end portion and an narrowed end portion spaced in said axial direction from said enlarged end portion, and each of said teardrop-shaped depressed surface portions converging from said enlarged end portion thereof to said narrowed end portion thereof, and each of said drain holes extending from one of said teardrop-shaped depressed surface portions so as to be recessed from the surrounding interior surface.
A one-piece injection molded washing machine tub comprising:
- a plastic bottom wall, and
- a plastic annular sidewall molded integrally with said bottom wall and extending in an axial direction from said bottom wall, said sidewall diverging radially outwardly from said bottom wall to facilitate removal of said tub from a mold assembly, said sidewall having therein a plurality of drain holes, and said sidewall including an interior surface, said interior surface including a plurality of teardrop-shaped depressed surface portions, each of said drain holes extending from one of said teardrop-shaped depressed surface portions so as to be recessed from the surrounding interior surface, each of said teardrop-shaped depressed surface portions including an enlarged end portion, and a narrowed end portion, each of said teardrop-shaped depressed surface portions being elongated in said axial direction and converging from said enlarged end portion to said narrowed end portion in said axial direction, and each of said teardrop-shaped depressed surface portions becoming shallower in said axial direction from said enlarged end portion toward said narrowed end portion.
Dependencies are inferred from the claim text.