Recessed-Handle Screed Plug for Drain Pipe Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the screeding process, screed material often inadvertently enters the openings of drain pipes, adhering to the pipe's interior and potentially blocking the flow of liquids, due to the pipes' protrusion above the intended screed height, which complicates the creation of an even surface and requires temporary obstructions like rags or paper to prevent this issue.
Innovation Solution
A screed plug with a resiliently deformable material for an interference fit within the drain pipe, featuring a handle that can be moved between recessed and projecting positions, is used to securely cover the pipe opening, preventing screed material from entering while allowing for easy insertion and removal, and a screeding guide with a curved and perforated design to facilitate even surface leveling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the drain pipe projects above the intended screed height to allow post-screeding cutting, then the pipe can be cut to appropriate height after concrete base is laid, but screed material will inadvertently enter the pipe opening during screeding
Solution Approach 1:
The patent applies preliminary action by installing a protective cover over the pipe opening before the screeding process begins. This cover prevents screed material from entering the pipe during the screeding operation, while still allowing the pipe to project above the intended screed height for later cutting. The cover is removed after screeding is complete, and the pipe can then be cut to the appropriate height.
2Object-affected harmful factors
If the pipe is cut close to or below the intended screed height to prevent material entry, then screed material cannot enter the pipe, but the pipe becomes an obstacle during levelling and limits screeding beam movement
Solution Approach 1:
The patent applies preliminary action by installing a protective cover over the pipe opening before screeding begins. This allows the pipe to remain at its full height (projecting above intended screed level) without preventing screeding beam movement, as the cover protects against material entry. The pipe can then be cut to appropriate height after screeding is complete.
3Object-affected harmful factors
If temporary material (rag or paper) is placed in pipe opening to prevent material entry, then screed material is blocked from entering pipe, but the material must be removed after screeding and provides incomplete protection
Solution Approach 1:
The patent applies the principle of disposable objects by using a protective cover that is installed temporarily during the screeding process. The cover is discarded or removed after screeding is complete, having served its purpose of preventing screed material from entering the pipe. This is more effective than using rags or paper that can deteriorate or be pushed into the pipe.
4Object-affected harmful factors
If the pipe projects above screed height, then there is less opportunity for wet concrete to enter pipes during base pouring, but the pipe obstructs the screeding process and complicates surface leveling
Solution Approach 1:
The patent applies preliminary action by installing a protective cover over the pipe opening before the screeding process begins. This allows the pipe to project above the intended screed height (which prevents wet concrete from entering during base pouring) while the cover protects against screed material entering during the subsequent screeding operation. The pipe can then be cut to appropriate height after both operations are complete.
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 screed plug effectively prevents screed material from entering the pipes, ensuring unobstructed flow and easier surface leveling, while the screeding guide aids in creating a sloped surface that directs water towards the drain, enhancing the efficiency of the screeding process.
Implementation Method 1
at least a part of the at least one side wall comprises a resiliently deformable material for engaging an internal wall of the conduit to hinder movement of the screed plug relative to the conduit
Implementation Method 2
resiliently deformable material
Data Source
AI summary
A screed plug (10) for placement in an open end of a conduit (70) comprises: a rigid top plate (18); a second surface (14); and at least one side wall (16) extending between the top plate (18) and the second surface (14); a recess (20) formed in the top plate (18); and a handle (22) for manipulating the screed plug (10). The handle (22) is houseable within the recess (20) and is reversibly movable from at least a first position within the recess (20) and a second position projecting from the recess (20).