Pipe Boot with Annular Beads for Accurate Cutting
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Solution Overview
Problem
Existing pipe boots are difficult to accurately cut to fit different pipe diameters, leading to inadequate axial length for hose clamps, which can result in a poor seal and damage during installation on flat roofs.
Innovation Solution
A pipe boot design featuring co-axial cylindrical tubular sections with annular beads and troughs allows for precise cutting to maximize axial length, preventing damage and ensuring a secure hose clamp fit, made from durable elastomeric materials like rubber or vinyl.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pipe boot is cut to fit the pipe diameter, then the boot fits the pipe, but the axial length may be insufficient for the hose clamp
Solution Approach 1:
The patent applies preliminary action by pre-forming annular beads at specific positions on the tubular sections before installation. These beads serve as predetermined cut indicators and stop points, guiding the roofer to make accurate cuts that preserve sufficient axial length for the hose clamp while ensuring a proper fit around the pipe.
Solution Approach 2:
The annular beads act as intermediary features between the cut location and the hose clamp installation. They provide a physical reference that mediates the relationship between the pipe boot structure and the cutting operation, ensuring that cuts are made at the correct position to maintain adequate axial length for the clamp.
2Ease of operation
If the roofer makes an inaccurate cut, then the cut is easier to make, but the pipe boot is damaged and the seal is compromised
Solution Approach 1:
The annular beads serve as intermediary guide features that facilitate accurate cutting. By providing a clear physical reference point, they mediate between the roofer's cutting action and the final seal integrity, making the cutting operation easier to perform accurately without compromising the reliability of the seal.
Solution Approach 2:
The patent utilizes visual differentiation (analogous to color changes) by forming annular beads that are radially outward of the shoulders, creating a visible and tactile feature that stands out from the rest of the tubular section. This makes the cut location easily identifiable, reducing the risk of inaccurate cuts that would damage the boot or compromise the seal.
3Loss of substance
If the tubular portion is too short, then the cut removes excess material, but the hose clamp slips off the pipe
Solution Approach 1:
The annular beads are pre-formed at specific positions to serve as preliminary indicators for the maximum cut location. This preliminary action ensures that when material is removed up to the bead position, sufficient axial length remains to prevent the hose clamp from slipping off, while still removing excess material that would interfere with proper installation.
4Manufacturing precision
If the annular bead is positioned too close to the shoulder, then the cut is more precise, but there is insufficient space for the hose clamp
Solution Approach 1:
The annular bead positioned radially outward of the shoulder acts as an intermediary reference that resolves the conflict between cut precision and adequate clamp space. The bead provides a clear cutting indicator while its radial positioning ensures that the axial distance from the bead to the shoulder remains sufficient for hose clamp installation, maintaining both precision and functionality.
Data Source
AI summary
A pipe boot includes a plurality of co-axial hollow cylindrical sections joined by an annular shoulder between successive sections. A first annular bead and a second annular bead surround each tubular section with the first annular bead positioned radially outward of each annular shoulder. The second annular bead is spaced a short distance from the second annular bead leaving an annular trough between them.