Powered Shingle Ripper with Eccentric Rocker Assembly
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Solution Overview
Problem
Current methods for removing old shingles from roofs are labor-intensive and lack adaptable, practical powered machines due to varying roof conditions, such as multiple layers, shingle composition, underlayment, and sheathing conditions.
Innovation Solution
A powered shingle ripper with a frame, handle, and a rocker assembly featuring a serrated blade mounted on a rotatable support member with adjustable angle capabilities via shims, allowing for adjustment to different stripping conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a powered shingle ripping machine is used, then productivity and efficiency are improved, but the machine lacks adaptability to varying roof conditions
Solution Approach 1:
The support member is made rotatable relative to the frame, allowing the blade angle to be dynamically adjusted during operation. This enables the machine to adapt to different roof conditions such as varying shingle layers, underlayment types, and sheathing conditions while maintaining powered efficiency.
Solution Approach 2:
The blade support angle parameter can be changed by rotating the support member to different angular positions. This parameter adjustment allows the machine to optimize its ripping action for different roof conditions, combining the benefits of powered operation with manual adaptability.
2Adaptability or versatility
If the blade support member is made rotatable for adjustment, then adaptability to roof conditions is improved, but device complexity increases
Solution Approach 1:
The machine is divided into functionally independent segments: the frame, the rotatable support member, and the blade assembly. This segmentation allows the support member to be independently rotated for angle adjustment without affecting other components, simplifying the overall adjustment mechanism while maintaining adaptability.
3Adaptability or versatility
If shims are added for angle adjustment, then adaptability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
Instead of using static shims for angle adjustment, the support member is designed to be rotatable, providing dynamic angle adjustment capability. This eliminates the need for multiple shim sets and complex manufacturing processes while enabling easy adaptation to different roof conditions during operation.
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
Enables efficient and adaptable removal of shingles across varying roof conditions, reducing labor and costs associated with reroofing by allowing operators to adjust the machine's angle and action to suit specific job requirements.
Implementation Method 1
A piston is connected to the support member. The piston is reciprocated in a cylinder block pivotally mounted on the frame such that the piston confines the support member to a specific arc of rotation on the axle.
Implementation Method 2
The rocker assembly includes a support member extending laterally across the frame with a serrated blade mounted thereon... One of the driven members is connected by a power train to the power source for rotation of the axle about the axis of the driven members.
Data Source
AI summary
A powered shingle ripper with a rocker assembly having a serrated blade. The rocker assemble is eccentrically mounted for rotation about an axis in a manner that the leading edge of the serrated blade reciprocates back and forth and up and down. Rotation of the rocker assembly about the axis is confined to a predetermined arc, the orientation of which may be under operator control.