Tamper-Resistant Hand Pump With Internal Fasteners And Gauge Housing
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Solution Overview
Problem
Hand-operated floor pumps are not designed for outdoor, public use and are susceptible to degradation, theft, and tampering, lacking precise pressure control and durability.
Innovation Solution
A tamper-resistant, weather-resistant hand pump design with a seamless exterior, internal fasteners, a robust piston rod, and a pressure gauge system that prevents tool access to fasteners, ensuring longevity and cost-effectiveness for public use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hand-operated floor pumps are designed for traditional use with external fasteners and accessible components, then ease of manufacture and repair is improved, but resistance to tampering and vandalism deteriorates
Solution Approach 1:
The patent removes external fasteners and extracting vulnerable components from the exterior, placing fasteners inside the pump body and making them inaccessible from the outside. This extraction of vulnerable elements from public view and access resolves the contradiction by preventing tampering while maintaining manufacturing simplicity through standard internal fastening methods.
Solution Approach 2:
The patent implements a nested structure where the pressure gauge is housed within a gauge housing that is integrated into the pump body. The fasteners are nested inside the pump body, and the gauge housing provides an additional protective layer. This nesting approach protects components without adding external complexity.
2Reliability
If hand-operated floor pumps are designed with a seamless exterior and internal fasteners, then resistance to tampering and weather degradation is improved, but ease of repair deteriorates
Solution Approach 1:
The patent segments the pump into distinct functional modules: a pump body, a gauge housing, and a valve head assembly. This segmentation allows the pump to maintain a seamless exterior for weather resistance while enabling modular repair where individual components can be replaced without disassembling the entire unit. The valve head assembly can be removed and replaced as a complete unit, simplifying repairs.
Solution Approach 2:
The patent incorporates preliminary design features such as pre-threaded holes, pre-positioned O-rings, and pre-assembled valve head assemblies that can be quickly installed. This preliminary preparation of components and interfaces enables rapid field repairs while maintaining the seamless protective exterior.
3Duration of action of stationary object
If hand-operated floor pumps are designed with a robust piston rod and tamper-resistant features, then durability is improved, but device complexity deteriorates
Solution Approach 1:
The patent merges the piston rod with the handle assembly, creating a unified robust structure that serves both as the operating lever and the structural backbone. This integration eliminates the need for separate fastening mechanisms between the rod and handle, reducing complexity while enhancing durability. The merged structure naturally resists tampering due to its monolithic construction.
4Measurement precision
If hand-operated floor pumps are designed with a pressure gauge system, then precision pressure control is improved, but device complexity deteriorates
Solution Approach 1:
The pressure gauge serves multiple functions: it provides precise pressure measurement, acts as a visual indicator for users, and the gauge housing serves as a protective barrier for internal components. This multi-functionality justifies the added complexity by delivering tangible benefits in precision control and component protection simultaneously.
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 design enhances the pump's durability, resistance to tampering and environmental factors, and provides precise pressure control, making it suitable for outdoor public use while maintaining cost-effectiveness.
Implementation Method 1
a pressure gauge system that prevents tool access to fasteners
Data Source
AI summary
An Example can include an elongate pump barrel extending along a length and defining an elongate hollow piston chamber. The Example can include a piston slidably movable within the piston chamber to compress air within the piston chamber. The Example can include a piston rod connected to the piston. The Example can include a handle connected to the piston rod to reciprocally slide the piston in the piston chamber. The Example can include a piston rod seal disposed around the piston rod and coupled with the elongate pump barrel. The Example can include a downward opening air intake passage, located away from the rod seal, in fluid communication with a top of the piston.