Backpack Sprayer Brace and Pump Axle Design
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Solution Overview
Problem
Backpack sprayers face issues such as bending or deformation of base brackets under excessive force, lack of ergonomic operation for both right- and left-handed users, and inadequate control over liquid agitation, which can lead to uneven operation and potential damage.
Innovation Solution
Incorporating a brace member to prevent base bracket deformation, a split pump axle with redundant rotation-limiting stop members for ambidextrous operation, and a system for selective agitation or non-agitation of liquids within the tank, along with an information card holding niche.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a base bracket is used to support the sprayer tank, then the sprayer can be stabilized on the ground, but the base bracket may bend or deform under excessive force
Solution Approach 1:
The support structure is divided into multiple components: a base bracket for stability and a separate brace member for deformation protection. The brace member connects to both the base bracket and the tank, creating a segmented reinforcement system that prevents bending while maintaining stability.
Solution Approach 2:
The brace member acts as a pre-installed protective element that prevents excessive deformation of the base bracket before damage can occur. By providing additional structural support in advance, the brace member cushions against the harmful effect of excessive force applied to the base bracket.
2Adaptability or versatility
If a single pump axle design is used, then the pump structure is simple, but it cannot accommodate both right-handed and left-handed operation
Solution Approach 1:
The pump axle is designed with asymmetric features including a non-circular cross-section and positioned rotation-limiting stops that are not symmetrically placed. This asymmetric design allows the axle to accommodate both right-handed and left-handed operation modes while maintaining a relatively simple overall structure.
Solution Approach 2:
The pump axle is designed as a universal component that serves multiple functions: it supports the pump mechanism, provides rotation limitation through stops, and accommodates both right-handed and left-handed operation. This multi-functionality achieves adaptability without significantly increasing complexity.
3Productivity
If the liquid in the tank is freely moving, then the liquid can be sprayed efficiently, but excessive agitation causes foam formation and uneven operation
Solution Approach 1:
The system provides dynamic control over liquid agitation through a movable agitator that can be adjusted to different positions and speeds. This allows the system to adapt the level of agitation to match the specific spraying requirements, preventing foam formation while maintaining efficient liquid flow for spraying.
Data Source
AI summary
Sprayer devices and related methods. The sprayer devices can be of a type that may be carried or worn on the back of a user. Each sprayer device has a tank, a spray outlet (e.g., a spray nozzle or spray wand) and either a manual or power pump. The sprayers may also incorporate one or more of the following: a) a brace member for deterring bending or deformation of a bottom bracket on the sprayer, b) a pump axle with redundant rotation-limiting stop members useable for either right-handed or left-handed operation, c) system for selective and/or controlled agitation or non-agitation of liquid within the sprayer tank and/or d) an information card holding niche with removable information card.