Rotating Scrubber Tail for Pool Cleaner Wear Reduction

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Solution Overview

Problem

Conventional pool cleaner sweep tails with stationary scrubbers wear unevenly and require frequent replacement or manual repositioning due to their non-rotatable design, which limits their effectiveness and efficiency in scrubbing pool surfaces.

Innovation Solution

A sweep tail design featuring a hose with a rotating scrubber system, including a first bearing coupled to the hose, a second rotating bearing, and a scrubbing element that can spin freely, allowing for even wear and improved scrubbing performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the scrubber is made stationary or non-rotatable by coupling it directly to the hose, then the structure is simple and easy to manufacture, but the scrubber wears unevenly and requires frequent replacement

Engineering Contradiction:
Improvescrubber lifespanVSAvoidscrubber structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The scrubber is designed to rotate freely around the hose instead of being stationary. A bearing system allows the scrubber to spin as the hose moves through the pool, distributing wear evenly across the entire scrubber surface and extending its usable life

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

A bearing is introduced as an intermediary component between the hose and the scrubber. This bearing enables rotational movement while maintaining the structural connection, solving the problem of uneven wear without requiring direct rigid coupling

Inventive Principle:
Principle #24Intermediary (Mediator)

2Duration of action of stationary object

If the scrubber is made rotatable around the hose, then the wear is distributed evenly and lifespan is extended, but the structure becomes more complex with additional bearing components

Engineering Contradiction:
Improvescrubber lifespanVSAvoidbearing system
Core Design Contradiction:
Duration of action of stationary objectVSDevice complexity

Solution Approach 1:

The scrubber's rotation is achieved through self-service mechanics. As the hose moves and flexes during pool cleaning operations, the bearing system automatically allows the scrubber to rotate in response to these movements, eliminating the need for external motors or complex drive mechanisms

Inventive Principle:
Principle #25Self-service

3Productivity

If the scrubber is stationary, then the structure is simple, but drag increases and cleaning efficiency decreases

Engineering Contradiction:
Improvecleaning efficiencyVSAvoidrotating mechanism
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The scrubber transitions from a static to a dynamic configuration. The ability to rotate allows the scrubber surface to continuously present fresh areas to the pool surface, improving cleaning efficiency while the bearing system keeps the mechanism relatively simple

Inventive Principle:
Principle #15Dynamics

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

The rotating scrubber system ensures more even wear and reduced drag, enhancing the cleaning efficiency and extending the lifespan of the scrubbers by allowing them to wear uniformly as they spin while whipping around the pool surfaces.

Implementation Method 1

The second bearing is capable of rotating around the first bearing and the scrubbing element is capable of rotating with the second bearing around the first bearing

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS9938744B2Free spinning sweep tail scrubber for a pool cleaner
Publication Date: 2018.04.10 PENTAIR WATER POOL & SPA INC
  • US9938744B2 patent drawing
  • US9938744B2 patent drawing
  • US9938744B2 patent drawing

AI summary

Embodiments of the invention provide a sweep tail for a pool cleaner including a hose, a connector coupled to a first end of the hose and connecting the hose to the pool cleaner, and a scrubber coupled to the hose near a second end of the hose. The scrubber can include a first bearing coupled to and positioned around the hose, a second bearing positioned around the first bearing, and a scrubbing element positioned around the second bearing. The second bearing is capable of rotating around the first bearing and the scrubbing element is capable of rotating with the second bearing around the first bearing.