Rotatable Downpipe Fitting for Twist-Resistant Gutter Drainage
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Solution Overview
Problem
Conventional rain gutter downpipes pose tripping hazards and are susceptible to damage due to their rigid connection, which can cause twisting forces when kicked or bumped.
Innovation Solution
A rotatable fitting for rain gutter downpipes that decouples rotational movement between sections, allowing the lower section to freely rotate about a longitudinal axis, reducing the risk of damage and tripping hazards by snapping fit design with annular channels and ridges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the downpipe is rigidly connected to extend laterally away from the building wall, then the rainwater discharge function is improved, but the tripping hazard and susceptibility to damage increase
Solution Approach 1:
The patent applies the dynamics principle by introducing a rotatable joint between the upper and lower sections of the downpipe. This joint allows the lower section to rotate freely relative to the upper section, transforming the rigid static connection into a dynamic movable connection. When the lower section is kicked or bumped, it can rotate to absorb the impact rather than transmitting twisting forces to the upper section, thereby reducing damage susceptibility while maintaining the lateral extension for rainwater discharge.
2Strength
If self-tapping screws are used to rigidly connect downpipe sections, then the structural strength is improved, but the twisting force transmission and damage risk increase
Solution Approach 1:
The patent applies segmentation by dividing the downpipe connection into two independent rotatable sections (upper section and lower section) connected by a rotatable joint. This segmentation allows each section to independently absorb rotational impacts, preventing the transmission of twisting forces across the entire downpipe assembly. The connection maintains structural integrity through controlled rotation rather than rigid fixation, thereby improving reliability against twisting force damage.
3Ease of operation
If the downpipe extends laterally away from the building wall, then the rainwater discharge away from foundation is improved, but the tripping hazard increases
Solution Approach 1:
The rotatable joint enables the lower downpipe section to dynamically adjust its position through rotation. When pedestrians accidentally kick or bump the extended lower section, it can rotate to absorb the impact rather than creating a fixed rigid obstacle. This dynamic behavior reduces the tripping hazard while maintaining the lateral extension necessary for discharging rainwater away from the building foundation.
Data Source
AI summary
A downpipe fitting for coupling between top and bottom ends of a downpipe. The downpipe fitting includes two parts connected together and rotatable relative to one another about a longitudinal axis thereof. The first part has an inlet, sized and shaped to couple with an outlet of a first section of the downpipe, above the downpipe fitting. The second part has an outlet which is sized and shaped to couple with an inlet of a second section of the downpipe, below the downpipe fitting. The inlet and outlet of the fitting define a flow path for rainwater therethrough. Rotation of the second section of downpipe below the downpipe fitting, about the longitudinal axis, is decoupled from the first section of downpipe above the downpipe fitting.