Rotatable Roof Jack Assembly for Variable Roof Pitches
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Solution Overview
Problem
Existing roof jacks require multiple variations to accommodate different roof pitches, leading to high inventory costs and storage needs for suppliers and potential installation delays due to incorrect pitch selection.
Innovation Solution
An adjustable roof jack design featuring a flange, cylinders with foldable sections, and a vent cap assembly that can be rotated to accommodate roof pitches from 0 to 45 degrees, providing a watertight seal and allowing for easy installation on various roof slopes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple variations of roof jacks are constructed and manufactured for different roof slopes, then the adaptability to different roof pitches is improved, but the device complexity and inventory requirements increase
Solution Approach 1:
The patent applies the dynamics principle by making the cylinder section rotatable relative to the flange, allowing a single roof jack design to adapt to different roof pitches dynamically during installation. The cylinder can be rotated to various angles (e.g., 0°, 45°, 90°) to match different roof slopes, eliminating the need for multiple fixed-angle variations.
Solution Approach 2:
The patent implements universality by designing a single roof jack that can serve multiple roof pitch requirements through the rotatable cylinder mechanism. This multi-functional design allows one product to replace multiple pitch-specific products, reducing inventory complexity while maintaining broad adaptability across different roofing applications.
2Adaptability or versatility
If multiple stock keeping units are maintained for different roof pitches, then the adaptability to different roof slopes is improved, but the loss of time and storage space increase
Solution Approach 1:
The rotatable cylinder allows installers to adjust the roof jack to the correct pitch during installation, eliminating the need to pre-select from multiple pitch-specific units. This dynamic adjustment capability prevents installation delays caused by ordering wrong pitch variations and reduces the time needed to match roof specifications.
Solution Approach 2:
By maintaining a single universal roof jack design that can be configured for various pitches, the system eliminates the time loss associated with managing and selecting from multiple SKUs. Installers can use the same basic unit for different roof slopes, reducing both storage time and installation decision time.
3Adaptability or versatility
If multiple variations of roof jacks are manufactured for different pitches, then the adaptability to different roof slopes is improved, but the manufacturing cost and storage costs increase
Solution Approach 1:
The dynamic rotatable cylinder mechanism allows a single manufactured design to serve multiple pitch requirements, eliminating the need to manufacture and store multiple pitch-specific variations. This reduces manufacturing complexity and storage space requirements while maintaining full pitch range accommodation through post-manufacturing adjustment.
Solution Approach 2:
The universal design with rotatable cylinder enables one roof jack model to replace multiple pitch-specific models, significantly reducing inventory storage space and associated costs. Suppliers can maintain a single product line that accommodates the full pitch range through adjustment rather than manufacturing diversity.
Data Source
AI summary
An adjustable roof jack comprising: a flange; a first cylinder having a first cylinder top portion being at an angle between 20 and 25 degrees and a first cylinder bottom portion, fixedly connected to the flange. There may be a second cylinder having a second cylinder top portion and a second cylinder bottom portion at an angle between 65 and 70 degrees. A second cylinder bottom fold is folded over a first cylinder fold to fixedly and rotationally connect at an angle between 20 and 25 degrees. A vent cap cylinder having a vent cap cylinder top portion and a vent cap cylinder bottom portion having at least one vent cap cylinder fold is folded over a second cylinder top fold to rotationally connect the vent cap cylinder to the second cylinder; and a vent cap assembly is fixedly attached to the vent cap cylinder top portion.