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US 6,180,588 B2Granted
Device for removing stains from swimming pool walls and concrete and the method of making the same
AssigneeTracey Dalton
InventorRoy J. Walters
Life of this patent
Estimating the term…
Abstract
A cleaning tool for cleaning the walls of a swimming pool or other concrete structures. Two different sized aggregate or abrasives are combined with a binder to provide an improved cleaning device. The binder and the aggregates are matched so as to wear at substantially identical rates.
Claims16
A cleaning composition, comprising:
- a first type of aggregate including silica sand no. 20 which is friable;
- a second type of aggregate including silica sand no. 30 which is friable;
- a binder for binding the first and second types of aggregate together;
- wherein upon the cleaning composition being scrubbed against a surface, the first and second type of aggregate and the binder all wear at substantially the same rate.
1 more element
A method of making a cleaning device for cleaning a surface, comprising:
- mixing a two part polymer composition;
- adding an aggregate comprising a silica sand no. 20 and a silica sand no. 30 to the mixture;
- molding said mixture;
- and
- curing the molded mixture.
2 more elements
A cleaning device, comprising:
- a first type of aggregate which is friable and having particles of a first size;
- a second type of aggregate which is friable and having particles of a second size, the size of the particles of the first type of aggregate is larger than size of the particles of the second type of aggregate and the second type of aggregate is nested within spaces between the first type of aggregate;
- a binder for binding the first and second types of aggregate together;
- wherein upon the cleaning device being scrubbed against a surface, the first and second types of aggregate and the binder all wear at substantially the same rate.
1 more element
Dependencies are inferred from the claim text.