Bottle Pump Air Vent Latch for Tamper Evidence and Leak Prevention
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Solution Overview
Problem
Existing fluid dispensers lack mechanisms to visually indicate if the pump assembly has been used and often leak during transport and storage when inverted or tipped, due to the absence of adequate tamper-evident and air venting solutions.
Innovation Solution
A tamper-evident mechanism using a frangible air vent and a piston pump arrangement with a latching system that includes a frangible member to indicate usage and prevent leakage by allowing air venting between the bottle interior and atmosphere.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pump assembly is coupled to a bottle against removal, then the pump assembly remains securely attached during use, but it cannot provide visual indication of whether the pump has been previously used
Solution Approach 1:
The patent uses a frangible member that changes its physical state from intact to broken, providing visual information about pump usage. This frangible member is positioned to be visible through a window in the bottle cap, allowing users to determine whether the pump has been used without compromising the secure attachment of the pump assembly to the bottle.
2Reliability
If a pump assembly is coupled to a bottle against removal, then the pump remains securely attached, but it often leaks during transport and storage when inverted or tipped over
Solution Approach 1:
The patent employs a latching mechanism that pre-positions the piston in a retracted state during transport, preventing fluid leakage before the pump is activated. The latch mechanism maintains the piston in a controlled position, and only releases it when the pump is properly activated at the point of use, thereby preventing leakage during transport and storage.
Solution Approach 2:
The patent uses a dynamic latching mechanism that transitions between locked and unlocked states based on pump activation. The latch mechanism allows the piston to move from a static retracted position during transport to a dynamic pumping position when activated, enabling the system to adapt its behavior based on operational state.
3Reliability
If a frangible air vent mechanism is provided, then air can vent between the bottle interior and atmosphere, but the mechanism adds complexity to the pump assembly
Solution Approach 1:
The patent integrates the frangible air vent mechanism into the existing bottle cap structure, combining multiple functions (sealing, venting, and usage indication) into a single integrated component. The frangible member serves both as an air vent and as a visual indicator of pump usage, eliminating the need for separate components and reducing overall system complexity.
Data Source
AI summary
A pump assembly which provides a frangible air vent mechanism for providing communication between the atmosphere and the interior of a bottle to which the pump assembly is to be coupled. A vent port is provided through a bottle cap member having an inner end open into the bottle and an outer end open to the atmosphere. A frangible plug member is received in the vent port with the frangible plug member when unbroken preventing flow through the vent port and the plug member when broken permitting flow through the vent port. A vent tab member is coupled to the frangible member with the vent tab member extending from the frangible member accessible on the exterior of the bottle cap member for engagement to apply forces to the vent tab that are translated to the frangible vent member to break the frangible member.