Closures To Prevent Refilling TRIZ Cases

See how a one-way valve in a straw-lid assembly uses pressure differential to prevent spills du

A weighted valve core below the transition surface keeps pourer cavities sealed under pressure, blocking fraudulent container refilling.

Non-planar torque ribs engage container flanges to raise retention torque while removing metallic liners and secondary seals for easier recycling.

A hollow cylindrical pourer uses a floating ball to control fluid flow through an integrated dosing spout.

Coaxial bodies and a vertical lid prevent refilling while enabling air entry to stop vacuum formation.

Ring-shaped removable tab with breakage lines prevents rotation and provides visual evidence of first opening.

A fuel tank filler neck flap uses two pivoted elements loaded by a spring to open via gas pump nozzle insertion.

Segmented closure design uses a frangible demarcation to separate the cap from the base, preventing unauthorized refilling without compromising the bottle seal.

An irreversible lever prevents full closure after initial opening, while a segmented contrasting color coating visually signals the opened state.

A compact closure design uses a U-shaped threaded pourer to achieve screw engagement within a reduced longitudinal envelope.

A metered valve uses a spring-loaded piston to dispense fixed product dosages from pressurized containers.

Upper closure flap exerts lifting force on lower closure flap to extend opening duration during fuel nozzle withdrawal.

Ratchet and pawl mechanism prevents valve unthreading, eliminating missile hazards while simplifying manufacturing.

Segmented flame barriers prevent flashback in fuel tank filler necks by adapting radially to nozzle diameters while maintaining gas-tight seals.

Constraining means prevent the covering case from returning to its assembly position, signaling bottle integrity without complex mechanisms.

A gas fuel vehicle fill port design incorporates a dedicated communicating hole to allow rod-like detector insertion into the vehicle body interior.

A directional arm equipped with a check valve enables natural fluid drainage while preventing spillage and drying out during inverted storage.

Segmenting the male thread suppresses leakage and cover breakage caused by impact forces.

Threaded sleeve integrates internal container engagement and external cap threading with snap-engaging tongues to prevent unauthorized refilling.

A circumferential tearing strip joins the annular outer body and inner cylindrical body to simplify manufacturing while enabling easy detachment upon tampering.

A bottle closing device uses a security tab with an elastic tooth to mechanically interfere with the pourer upon first opening.

A dispensing fitment includes a radially expandable element that falls into the container body upon removal.