Pneumatic Door Operator Using Push-Pull Valves
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Solution Overview
Problem
Existing systems for controlling door and window movement are complex, costly, and not suitable for retrofitting or easy relocation, lacking in safety and reliability, especially for use in residential and commercial settings.
Innovation Solution
A fluid-powered door operating system utilizing a pressurized fluid source, double-acting cylinder, and push-pull valves, which allows for safe and gentle operation by controlling the movement of doors and windows using a pneumatic system with adjustable venting and solenoid valves, integrated with a programmable logic controller for enhanced functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical interface methods and sensors are used to control door movement, then control precision and safety are improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and removes complex electrical sensors, switches, and control systems from the door operating mechanism. Instead, it uses a simple manual key-operated lock mechanism combined with basic electrical contacts that close circuits when the door is properly locked, achieving safety without complexity.
Solution Approach 2:
The system uses the door's own mechanical locking action to automatically close electrical circuits and activate alarms or indicators. The mechanical key insertion and turning motions directly drive the locking mechanism and simultaneously close electrical contacts, eliminating the need for separate sensors and control systems.
2Ease of operation
If electro-mechanical systems with motors and mechanical means are used, then door movement control is achieved, but device complexity and cost increase
Solution Approach 1:
The patent removes electric motors, cables, chains, and complex mechanical transmission systems from the door operating mechanism. It replaces these with a direct manual key-operated lock system that uses simple mechanical leverage and spring-loaded latches, achieving ease of operation without electro-mechanical complexity.
Solution Approach 2:
The system incorporates a spring-loaded pneumatic mechanism that automatically latches the door when the key is turned to the locked position. The spring provides the force needed to engage the latch and hold the door secure, eliminating the need for motors and complex mechanical holding systems.
3Reliability
If complex electrical sensors and control systems are installed, then safety and control are improved, but ease of installation and relocation are worsened
Solution Approach 1:
The patent extracts and eliminates complex electrical sensors, control units, and wiring systems that would complicate installation and relocation. It uses a simple key-operated mechanical lock with basic electrical contacts that can be easily wired in series with existing doorbell or alarm circuits, enabling straightforward installation and relocation.
Solution Approach 2:
The system is designed to work with various door types and existing security systems through universal mounting brackets and adaptable wiring configurations. The key-operated mechanism and electrical contacts can be integrated with different alarm systems, doorbells, or access control systems without requiring custom installation for each application.
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 system provides a cost-effective, reliable, and safe means to operate doors and windows, suitable for retrofitting and relocation, with features like automatic operation, obstacle detection, and manual override, ensuring smooth and gentle movement without interfering with normal manual operation.
Implementation Method 1
a pressurized fluid source (102)... connects the first cylinder chamber to the pressurized fluid source, and vents the second chamber, thereby pushing the piston in a first direction
Implementation Method 2
two fluid control push pull valves (144a), (144b)... Activating or energizing one push pull valve while deactivating the second push pull valve connects the first cylinder chamber to the pressurized fluid source
Data Source
AI summary
A door opening and closing operating system includes a pressurized fluid source (102), two fluid control push pull valves (144a), (144b), and a double acting cylinder (160) which is mounted to the movable element of a door (66) mounted within its adjacent frame (62) for the purpose of opening and closing the door. This system utilizes two push pull valves connected fluid-wise to opposite sides of the piston. Activating or energizing one push pull valve while deactivating the second push pull valve connects the first cylinder chamber to the pressurized fluid source, and vents the second chamber, thereby pushing the piston in a first direction, which pushes the door in a first direction. Energizing the second push pull valve and de-energizing the first push pull valve has the opposite effect, and moves the piston and attached door in a second direction opposite the first direction.