Fluid-Activated Release Mechanism for Automatic Life Preserver Inflation
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Solution Overview
Problem
Inflatable life preservers often fail to inflate automatically when the user is unconscious, necessitating a reliable inflator system to keep the person's head above water in emergency situations.
Innovation Solution
A fluid-activated automatic release apparatus that includes a liquid sensor coupled to a cam member, a piercing pin, and a linear actuator, which automatically releases pressurized gas from a cylinder bottle upon sensing water, ensuring the life preserver inflates even if the user cannot manually activate it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual activation is used, then the device complexity is reduced, but the reliability decreases when the user is unconscious
Solution Approach 1:
The life preserver automatically detects water contact and triggers inflation without requiring user action. The sensor component detects when the life preserver is in the water and automatically activates the inflator, allowing the system to serve itself in the critical moment when the user may be unconscious or unable to act.
Solution Approach 2:
The patent replaces purely mechanical manual activation with an automated system that uses sensor detection (electrical or electronic) to trigger the inflation mechanism. This substitution of mechanical user action with automated sensing and actuation systems resolves the contradiction by providing reliable automatic inflation while managing device complexity through integrated design.
2Reliability
If automatic water sensing is added, then the reliability improves, but the device complexity increases
Solution Approach 1:
The cam member serves multiple functions: it acts as a structural support, a cam surface for the follower, a positioning element for the piercing pin, and a mechanical amplifier for the actuator force. By making the cam member multi-functional, the patent reduces the need for separate components, thereby managing device complexity while achieving reliable automatic water-sensing inflation.
Solution Approach 2:
The patent combines the sensor component, cam member, piercing pin, and spring into an integrated assembly where components work together in a compact mechanism. The sensor, cam, and actuator are merged into a unified system that triggers inflation through a single coordinated action, reducing overall system complexity compared to separate independent systems.
3Reliability
If a cam member with follower is used, then the actuation reliability improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent employs a spring-loaded piercing pin mechanism where the spring provides controlled force and the cam member provides mechanical advantage through its geometry. By optimizing the spring constant, cam profile angles, and follower positioning, the system achieves reliable actuation with moderate manufacturing tolerances, converting precision requirements into controllable mechanical parameters.
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 apparatus reliably inflates the life preserver upon contact with water, ensuring the user's head remains above water even if they are unconscious, enhancing safety in emergency situations.
Implementation Method 1
A fluid-activated automatic release apparatus that includes a liquid sensor coupled to a cam member
Data Source
AI summary
A fluid activated automatic release apparatus is configured to release a pressurized gas from a cylinder bottle and/or activating various mechanical release mechanisms. The apparatus may include a liquid sensor component moveably coupled to a cam member; and a piercing pin configured to engage a fluid container, responsive to rotatable movement of the cam member. The apparatus may include a liquid sensor component moveably coupled to a cam member; and a barrel device biased to move linearly responsive to rotatable movement of the cam member.