Washer Agitator Assembly With Scrub Brush and Centrifugal Dosing
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Solution Overview
Problem
Existing fabric treating appliances, such as washing machines, lack an effective mechanism for pretreating stains and dispensing wash additives during the wash cycle, relying on traditional agitators that do not efficiently integrate mechanical scrubbing and chemical dispensing.
Innovation Solution
An agitator assembly with a scrub brush and a centrifugally actuated dispensing system, featuring a removable cap with a scrub brush and a graduated dosage gauge, allows for manual pretreatment of stains and controlled dispensing of wash additives, integrating mechanical scrubbing with centrifugal force for efficient distribution of treatment chemistry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional agitator is used in a fabric treating appliance, then the structure is simple, but it lacks effective stain pretreatment capability and efficient wash additive dispensing
Solution Approach 1:
The patent combines multiple functions into a single agitator assembly: mechanical scrubbing through integrated brush elements, chemical treatment through wash additive dispensing, and centrifugal distribution. This merging transforms a simple mixing device into a multifunctional pretreatment and dispensing system, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The agitator is designed to perform multiple functions simultaneously: it acts as a mechanical scrubber with integrated brushes, a chemical dispenser for wash additives, and a centrifugal distribution mechanism. This multi-functionality allows a single device to replace multiple separate components, enhancing adaptability while managing structural complexity.
2Measurement precision
If wash additives are dispensed without controlled dosage, then the dispensing process is simple, but the treatment precision and fabric optimization are poor
Solution Approach 1:
The dispensing cup is pre-filled with wash additives before the wash cycle begins. This preliminary action allows for controlled dosage distribution throughout the cycle, as the centrifugal force systematically dispenses predetermined amounts of chemical treatment, improving measurement precision without requiring complex real-time dosing mechanisms.
Solution Approach 2:
The system uses the agitator's own rotational motion and centrifugal force to dispense wash additives automatically, without requiring separate pumping or metering mechanisms. The rotation speed and pattern naturally control the dispensing rate, achieving dosage precision through self-regulating physics rather than complex external control systems.
3Productivity
If mechanical scrubbing and chemical dispensing are performed separately, then each function is simple, but the overall treatment efficiency and stain removal effectiveness are reduced
Solution Approach 1:
The patent merges mechanical scrubbing elements (brushes) and chemical dispensing (wash additive cup) into a single integrated agitator assembly. Both functions operate simultaneously during the same wash cycle, allowing mechanical and chemical treatments to work synergistically on stains, thereby improving productivity and stain removal efficiency compared to separate treatment steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances stain removal by combining mechanical scrubbing with controlled chemical dispensing, ensuring optimal treatment of fabrics through targeted application and efficient distribution of wash additives during the wash cycle.
Implementation Method 1
a scrub brush having bristles extending from the bottom of the cap wherein the cap is removably mounted to the tower and when the cap is mounted to the tower, the bottom of the cap confronts the upper end of the tower and the scrub brush is located between the upper end and the bottom wherein at least a portion of the bristles extend downward and are received in the recess in the upper end of the tower
Implementation Method 2
a scrub brush having bristles extending from the bottom of the cap
Implementation Method 3
an agitator, such as in a washing machine. The agitator may have a removable cap and an integrated scrub brush. The agitator can also serve as a centrifugally activated treating chemistry dispenser
Data Source
AI summary
A fabric treating appliance having an agitator assembly comprising a base including at least one vane, and a tower extending upwardly from the base and terminating in an upper end having a recess. The agitator includes a cap having a top and a bottom that is removably mounted to the tower. A scrub brush is carried by the cap.