Foot-Operable Door Opener With Spring-Loaded Wheel Assembly
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Solution Overview
Problem
Existing door openers are complex, expensive, and lack a simple, cost-effective means to open doors without using hands, especially in scenarios where hygiene is a concern or manual strength is insufficient, such as during pandemics or for individuals with disabilities.
Innovation Solution
A foot-operable door opener using a pedal mechanism with a ratcheted hinge and spring-loaded wheel assembly that engages a gear system for mechanical advantage, allowing doors to be opened and closed without electrical assistance, suitable for retrofitting various door types and providing a time delay for safe egress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrically operable door openers are used, then door opening function is achieved, but system complexity and installation cost increase
Solution Approach 1:
The patent replaces electrical motor systems with a purely mechanical spring-loaded wheel assembly that engages with the door. The foot pedal actuates a crank mechanism that winds a spring, which then stores energy to rotate the wheel and push the door open. This mechanical substitution eliminates motors, batteries, and electrical controls while maintaining hands-free operation through foot pedal activation.
Solution Approach 2:
The spring-loaded wheel assembly is designed to automatically engage and disengage from the door without manual intervention. After the foot pedal is released, the spring automatically rotates the wheel to push the door open, and the wheel automatically disengages when the door reaches the open position. This self-service mechanism eliminates the need for continuous electrical power or complex control systems.
2Object-affected harmful factors
If standard door handles are used, then door operation is simple, but hygiene is compromised due to pathogen transmission
Solution Approach 1:
The patent introduces a foot pedal as an intermediary mechanism between the user and the door. Instead of direct hand contact with the door handle, the user activates the door opening mechanism through foot pedal, which transmits force through a mechanical transmission system (crank, wheel, spring) to open the door. This intermediary approach eliminates hand contact with contaminated surfaces while maintaining operational capability.
3Ease of operation
If non-motorized cradle for footwear is used, then hands-free operation is achieved, but mechanical advantage is insufficient to overcome door resistance
Solution Approach 1:
The foot pedal actuates a crank mechanism that winds a spring before the door opening action occurs. This preliminary action stores mechanical energy in the spring, which is then released to rotate the wheel and push the door open with sufficient force to overcome standard door closers (5-10 lbs resistance). The spring pre-loads the mechanical advantage needed for effective door operation.
Solution Approach 2:
The patent employs a dynamic spring-loaded wheel assembly that can adapt to varying door conditions. The spring can be adjusted to provide different levels of mechanical assistance, and the wheel can engage or disengage based on real-time door position and resistance. This dynamic mechanism ensures sufficient force is applied when needed while maintaining hands-free operation.
4Ease of operation
If motorized door openers are installed, then ease of operation is improved, but installation cost and complexity increase
Solution Approach 1:
The patent uses inexpensive mechanical components (spring, wheel, crank, pedal) instead of expensive motorized systems. These simple mechanical parts are cost-effective to manufacture and install, making the system economically viable for widespread adoption in residential and commercial settings while providing the same hands-free operation benefit.
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
Provides a hygienic, cost-effective, and ergonomic solution for opening doors without hands, accommodating various door types and environments, ensuring safe and efficient ingress and egress while avoiding manual contact with potentially contaminated handles.
Implementation Method 1
a ratcheted hinge and spring-loaded wheel assembly that engages a gear system for mechanical advantage
Implementation Method 2
pedal mechanism with a ratcheted hinge and spring-loaded wheel assembly that engages a gear system for mechanical advantage
Data Source
AI summary
A cost-effective, hands-free door opener activated via foot, cane, remote, Bluetooth, security systems, smart home technology, or proximity sensors which promotes hygienic and accessible door operation without physical contact. This device features a linear motion mechanism with a spring-loaded drive wheel, ensuring stable operation across varied surface types, environments, and door orientations. It includes precise control over the angle, distance, and speed of door opening and closing, complemented by user interfaces. Sensors adapt to environmental conditions and user presence, reducing pathogen transmission risks. Programmable delays for door operations cater to different traffic flows and safety requirements. The system supports various motor types and power setups including wireless operation and charging, suitable for retrofitting existing doors in commercial, institutional, and residential areas. Safety features detect obstructions, ensuring seamless operation. This invention integrates robust mechanical design with intelligent sensors integrated by a controller, enhancing door functionality in diverse environments.