Pneumatic Trailer Door Locking for Temperature and Access Control
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Solution Overview
Problem
Current door systems for trailers and containers face challenges in maintaining temperature-controlled environments, reducing physical stress on drivers, minimizing air infiltration, and ensuring security against tampering during the transportation of perishable goods and sensitive products.
Innovation Solution
A pneumatic door system with a secure locking mechanism and automatic access control using a pneumatic lock, electronic controller, and wireless signal reception for controlled opening and closing, integrated with a refrigeration unit to maintain temperature and prevent unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual door opening and closing is used, then drivers have direct control over door operations, but this causes significant physical stress on drivers, slows down the delivery process, and increases the probability of injury
Solution Approach 1:
The patent replaces manual mechanical door operation with an automated pneumatic system. A pneumatic cylinder is connected to the door assembly, enabling automatic opening and closing of the door through pneumatic actuation controlled by a controller, thereby eliminating the need for manual door handling and reducing physical stress on drivers
Solution Approach 2:
The door system performs self-service through automated operation. The controller automatically activates the pneumatic cylinder to open the door when the vehicle stops and closes it when ready to depart, without requiring driver intervention for door manipulation, thus improving delivery speed and safety
2Ease of operation
If manual door operation is used, then drivers can control door timing, but this introduces undesirable amounts of external air into the trailer and makes it difficult to maintain temperature-controlled environments
Solution Approach 1:
The system replaces manual door control with automated pneumatic actuation controlled by a controller that coordinates door operation with vehicle movement. The pneumatic cylinder opens the door only when the vehicle is stationary and closes it promptly when movement is detected or commanded, minimizing the duration of door openness and reducing external air infiltration that would disrupt temperature control
Solution Approach 2:
The controller receives feedback from vehicle speed sensors and automatically adjusts door operation accordingly. When the vehicle is moving, the controller ensures the door remains closed; when stopped, it permits door opening. This feedback mechanism prevents premature or prolonged door opening that would compromise the temperature-controlled environment
3Reliability
If basic locking mechanisms are used, then door security is provided, but this is insufficient to protect against tampering by terrorists or unauthorized access
Solution Approach 1:
The patent merges multiple security functions into an integrated locking system. The pneumatic cylinder serves dual purposes: it acts as both the door actuator and the locking mechanism. When pressurized, it opens the door; when depressurized, it automatically locks the door, combining actuation and security functions in a single mechanism controlled by the same pneumatic system
Solution Approach 2:
The system replaces traditional mechanical locking mechanisms with a pneumatic actuation system. The pneumatic cylinder provides both door opening force and locking capability through its position and pressure state, eliminating the need for separate locking components and providing more reliable security against tampering through automated control
4Productivity
If repeated manual door opening and closing is performed, then delivery operations can proceed, but this causes physical stress on drivers and increases the probability of injury
Solution Approach 1:
The patent replaces manual door operation with automated pneumatic actuation. The pneumatic cylinder is activated by the controller based on vehicle stop/detect conditions, automatically opening and closing the door without driver physical intervention. This eliminates repetitive strain on drivers while maintaining continuous delivery operations
Solution Approach 2:
The door system performs self-service through automated operation triggered by vehicle status. The controller monitors vehicle stops and automatically activates the pneumatic cylinder to open the door when needed and close it when ready to depart, without requiring driver physical action, thus eliminating physical stress while maintaining operational continuity
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 door system effectively maintains temperature, reduces physical stress on drivers, minimizes air infiltration, and enhances security by automating door operations and locking mechanisms, ensuring the integrity of contents during transport.
Implementation Method 1
A pneumatic mechanism for opening the main door; a tank and a system of valves and conduits configured to provide fluid communication between the tank, the pneumatic lock and the pneumatic door opening mechanism
Implementation Method 2
A pneumatic lock is positioned so as to be capable of locking the main door
Data Source
AI summary
A pneumatic door system and a method of using the same are disclosed herein. According to one embodiment, a trailer may include a seamless main door and at least one side door. The doors may be configured to be locked shut with a system of pneumatic locks. The main door may be configured to open and close as controlled by pneumatic pressure applied to a door cylinder. The pneumatic system may be configured to be controlled by an interior control box. The pneumatic system may be configured to operate off of pneumatic pressure in an auxiliary air tank, the pressure being protected by a series of one-way check valves. The pneumatic system may also be configured to operate wirelessly using RFID or Bluetooth technology, among other things, to secure the cargo and facilitate ingress and egress to the trailer.