Contracting/Expanding Measuring Chambers TRIZ Cases

An integrated valve body with a flexible sealing lip closes the inlet opening under pressure to prevent leakage of low surface tension liquids.

Segmented pre and main metering chambers with coupled movable walls isolate reservoir pressure to ensure precise dosing.

Adjustable nozzle actuator control prevents fluid waste by inhibiting delivery to defective receptacles while maintaining continuous production rates.

Bidirectional diaphragm design doubles fluid volume per cycle, resolving the trade-off between increased pumping capacity and device weight constraints.

A portable mechanical dispenser uses a central shaft plunger to move liquid through an outlet for precise dosing.

A metered dosing device uses an external control rod to actuate a piston within a cylinder.

A compact diaphragm dosing unit with side-by-side valves delivers precise fluid volumes through mechanical stroke adjustment.

A bladder valve lifts to cover the shaft, retaining a metered dose within the cap assembly.

Replacing solenoids with shape memory alloy wires eliminates magnetic susceptibility, allowing the pump to operate during MRI scans.

An exhaust valve assembly uses an integrally molded safety valve seat to create a planar sealing interface with minimal compression force.

A pipette merges dosing and ejection into one button press using a decoupling device that limits piston travel to eliminate dead volume.

A refill cartridge connects to a fluid dispenser case through a screwing mechanism driven by a rotary actuating ring, preventing fluid loss during insertion.

A brake assembly holds the shaft in an advanced position, reducing pharmacist physical exertion during filling.