Broadcast Spreader Hopper Bottom Opening Control
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Solution Overview
Problem
Existing particulate spreaders that use deflectors to prevent material from exiting one side often result in over-treatment of lawns and waste, as the material flow rate remains constant regardless of deflector activation, leading to excessive material being directed onto the lawn and wasted on non-lawn areas.
Innovation Solution
A broadcast spreader with a hopper and impeller that can be configured to change the number of through openings at the bottom, allowing for different spread patterns by activating a spread control assembly that impedes material from one side while reducing the overall material flow rate, thereby minimizing waste on non-lawn areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a deflector is activated to impede particulate material from exiting one side of the spreader, then material dispersal onto non-lawn areas is reduced, but the material flow rate remains constant causing over-treatment of the lawn and waste
Solution Approach 1:
The bottom opening of the hopper is divided into multiple individual openings that can be independently controlled. The spread control mechanism selectively closes specific openings based on the spreader's position relative to the lawn boundary, allowing precise control over material flow to different areas.
Solution Approach 2:
The spread control mechanism dynamically adjusts the configuration of the multiple bottom openings based on real-time position detection. As the spreader moves across the lawn boundary, the system opens or closes specific openings to adapt the material flow rate and spread pattern accordingly.
2Object-affected harmful factors
If a deflector is used to prevent material from exiting one side, then spread pattern control is improved, but the device complexity increases
Solution Approach 1:
The patent removes the traditional deflector component entirely and replaces it with a simpler system of controllable bottom openings in the hopper. This extraction of the deflector function from a separate mechanical component and integration into the hopper structure simplifies the overall device while achieving the same spread pattern control.
Solution Approach 2:
The multiple bottom openings serve multiple functions: they control material flow rate, define spread pattern, and work with position detection to prevent material waste. This multi-functionality eliminates the need for separate deflector mechanisms, reducing device complexity.
3Quantity of substance
If the number of through openings is changed to alter spread pattern, then material flow rate is regulated, but the device complexity increases
Solution Approach 1:
The bottom opening is segmented into multiple discrete openings that can be independently opened or closed. This segmentation allows the system to regulate material flow rate by controlling the number of active openings without requiring complex mechanical structures, as each opening can be controlled by simple position-based actuation.
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 solution effectively reduces the amount of particulate material dispersed onto non-lawn areas and regulates the material flow rate, preventing over-treatment and waste by altering the spread pattern based on the activation of the spread control assembly.
Implementation Method 1
an impeller disposed below the hopper that rotates to distribute the particulate material in a spread pattern
Data Source
AI summary
A broadcast spreader and methods of using the same. One method includes dispersing particulate material using a broadcast spreader having a hopper and an impeller by placing the spreader in a first configuration where a first set of through openings proximate a bottom portion of the hopper permit the particulate material to pass therethrough and fall onto the impeller to thereby be distributed in a first spread pattern, and shifting the spreader into a second configuration where a second set of through openings proximate the bottom portion of the hopper permit the particulate material to pass therethrough and fall onto the impeller to thereby be distributed in a second spread pattern. The first set of through openings includes a different number of through openings than the second set of through openings, and the first spread pattern is different than the second spread pattern.