Spring-Loaded Piercing Mechanism for Recessed Gas Cartridge Membranes
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Solution Overview
Problem
Existing high-pressure nitrogen (N2) gas cartridges are unsafe and unreliable for use in devices designed for lower-pressure carbon dioxide (CO2) cartridges due to the risk of catastrophic failure and incomplete sealing, leading to insufficient gas flow.
Innovation Solution
A high-pressure N2 gas vessel with a recessed pierceable membrane and an elongated pin mechanism, combined with a housing and seal system, ensures safe and complete piercing and gas flow by protecting the membrane from conventional piercing mechanisms and allowing controlled penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an N2 cartridge is inserted into a device designed for CO2 cartridges, then the device can operate more powerfully or longer, but catastrophic failure may occur due to the higher pressure
Solution Approach 1:
A safety intermediary mechanism is introduced between the N2 cartridge and the device: a pin that must fully penetrate a membrane to activate gas flow. This intermediary prevents direct connection at insufficient seating depths, blocking the harmful back pressure effect that causes catastrophic failure while allowing the high-power N2 cartridge to function safely.
Solution Approach 2:
The patent applies preliminary anti-action by designing a system that preemptively counteracts the harmful effect of high back pressure. The membrane-pin mechanism is configured to prevent gas flow until complete seating is achieved, thereby preventing the back pressure from building up to dangerous levels before the connection is secure.
2Ease of operation
If a pin in the device partially pierces the N2 cartridge membrane, then the cartridge can be seated, but gas flow from the cartridge to the device may be insufficient
Solution Approach 1:
The sealing interface is segmented into two distinct functional zones: a membrane layer that requires full pin penetration to breach, and a secondary sealing surface. This segmentation ensures that partial piercing cannot establish gas flow, as the membrane remains intact until complete seating is achieved, thereby guaranteeing reliable gas flow when properly connected.
3Object-affected harmful factors
If the membrane is recessed from the opening of the pressure vessel, then prior art piercing mechanisms cannot pierce the membrane for safety purposes, but a specialized elongated pin mechanism is required
Solution Approach 1:
The membrane is positioned with local quality differentiation: recessed from the outer surface at one location to prevent access by conventional pins, while maintaining accessibility at a specific localized point through the housing. This allows safety (blocking general access) while enabling function (allowing controlled penetration by the specialized elongated pin).
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 solution provides a safer and more reliable mechanism for high-pressure N2 gas vessels, ensuring consistent gas flow and reducing the risk of injury or device failure, while enabling devices to operate more powerfully or for extended periods.
Implementation Method 1
a spring-loaded pin mechanism, the spring being compressible to cause the pin to pierce the membrane
Data Source
AI summary
A piercing mechanism for a pressure vessel having a recessed membrane includes an inner housing that receives the pressure vessel and controls longitudinal movement of the vessel. The inner housing is slidably received in an outer housing, which can constrain the inner housing to reciprocating longitudinal movement therein. A pin in the outer housing configured to selectably pierce the membrane extends longitudinally through the inner housing in alignment with the membrane when the pressure vessel is received in the inner housing. A biasing member in the outer housing biases the inner housing away from an interior surface of the outer housing so the pin does not contact the membrane when the pressure vessel is received in the inner housing. The inner housing is selectably slidable to compress the biasing member and cause the pin to pierce the membrane when the pressure vessel is received in the inner housing.