Pneumatic Pushbutton Actuation for Hygienic Hands-Free Retrofitting
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Solution Overview
Problem
Conventional actuating devices suffer from hygiene issues due to contamination and are difficult to retrofit with electronic remote controls, especially for individuals with disabilities.
Innovation Solution
A pneumatic remote actuating device comprising an actuator block, an actuated block, and a tube that transmits air pressure variations to displace a pusher, allowing for foot-operated activation of external pushbuttons without direct finger contact, thus improving hygiene and ease of use for those with disabilities, and can be easily installed without electrical modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional pushbuttons are used for actuation, then the device can be operated directly, but hygiene is compromised due to contamination and virus transmission risk
Solution Approach 1:
The patent introduces a pneumatic intermediary system consisting of a tube connecting a first enclosure (with pushbutton) to a second enclosure (with pusher). When the pushbutton is pressed, it creates air pressure variation that travels through the tube to actuate the pusher remotely, eliminating direct contact with contaminated surfaces while maintaining operational capability
Solution Approach 2:
The patent replaces the direct mechanical contact system with a pneumatic transmission system. Instead of direct mechanical actuation where the operator's finger directly presses the button, the system uses compressed air as the transmission medium to transfer the actuation force through the tube, thereby substituting mechanical contact with pneumatic transmission
2Ease of operation
If electronic remote controls are installed to improve accessibility, then operation becomes easier for persons with disabilities, but retrofitting becomes time-consuming and costly
Solution Approach 1:
The patent divides the remote actuation system into separate modular components: a first enclosure containing the pushbutton, a connecting tube, and a second enclosure containing the pusher. This segmentation allows each component to be independently manufactured and installed, enabling simple retrofitting of existing equipment without complex integration requirements
Solution Approach 2:
The patent employs a pneumatic transmission system using air pressure variations transmitted through a tube, eliminating the need for electrical wiring, power supplies, or electronic components. This mechanical-pneumatic approach simplifies retrofitting significantly compared to electronic systems, as it only requires physical connection of the tube between components
3Object-affected harmful factors
If a pneumatic transmission system is implemented to improve hygiene, then direct contact is eliminated, but device complexity increases
Solution Approach 1:
The patent designs the pneumatic transmission system with universal applicability - the same basic configuration (enclosure, tube, pusher) can be used for various actuation applications. The system serves multiple functions: it provides remote actuation, eliminates direct contact, and can be adapted to different operating contexts without requiring fundamentally different designs
Solution Approach 2:
The patent utilizes a flexible or rigid tube as the pneumatic transmission element, which can be easily routed and connected between components. The tube acts as a simple, flexible connection that accommodates various installation geometries without requiring complex rigid piping or structural support, thereby minimizing overall system complexity
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 pneumatic remote actuating device effectively addresses hygiene concerns and accessibility issues by allowing hands-free operation of pushbuttons, reducing contamination risk and simplifying the activation of various devices without requiring electrical power or wiring, while being easily installable and adaptable for different applications.
Implementation Method 1
compressing the first compressible internal chamber causes an air pressure variation in the first internal chamber, the air pressure variation being transmitted from the first enclosure to the tube... the air pressure variation being transmitted from the tube to the second internal chamber
Data Source
AI summary
A pneumatic remote actuating device includes an actuator block, an actuated block and a tube connecting the actuator block to the actuated block. The actuator block includes an enclosure that can be mounted on a generally flat surface. A pushbutton protrudes in front of the actuator block. Depressing the pushbutton causes an increase of pressure within an internal chamber of the enclosure. This pressure is transmitted from the actuator block, via the tube, to the actuated block. The actuated block comprises its own enclosure that can be mounted on a generally flat surface to place the actuated block in an overlapping position over an external pushbutton. The pressure transmitted from the actuator block to the actuated block causes a displacement of a pusher mounted in the enclosure of the actuated block. As a result, the pusher actuates the external pushbutton.