Infusion Syringes TRIZ Cases

An elastic resetting mechanism in the dispensing piston generates a partial vacuum that prevents dripping and ensures secure sealing for viscous materials.

A needle assembly uses a retaining portion and elastic member to hold the needle tube in place.

A flush syringe assembly uses a collapsible plunger stopper to deliver additional fluid after the main stroke.

Contrasting member creates high-contrast background to resolve low-light visibility issues and improve blood detection accuracy.

A dual-channel injection bipolar electrosurgical knife integrates active and inert electrodes with a hollow tubular portion for liquid delivery.

Segmented drainage openings eject excess liquid to prevent clogging and minimize material loss during high viscosity application.

Injection molding integrates the needle into the syringe barrel to eliminate adhesive contamination risks and simplify manufacturing.

A portable infusion pump system combines medication delivery with media playback in a single compact device.

A mechanical ball joint coupling reduces plunger tilt and wobble to maintain precise axial motion and dose accuracy in infusion devices.

Shielding cylinder covers the lower end of an injection needle during removal, preventing accidental user injury from sharp tips.

Asymmetric geometric features and magnetic inserts in infusion system connectors prevent cross-channeling of multiple medicaments.

Axial protrusion inside plunger sleeve constricts rod to lower break loose force, resolving tight seal friction trade-off in pre-filled syringes.

Merging slitting tools into hemostasis valves eliminates separate alignment steps, simplifying medical device removal procedures.

A rail-guided lumbar puncture needle uses a guiding conduit and groove to direct the spinal needle during combined anesthesia procedures.

A filling extender attaches to short syringe cartridges to match the length and configuration of long cartridges at a filling station.

An infusion pump priming cap uses an embedded RFID tag to verify cannula attachment, preventing occlusion errors during the priming sequence.

Segmenting the main body from disposable needles reduces manufacturing complexity and prevents cross-contamination during multi-reservoir drug delivery.

Folded outer edge secures inner body to prevent accidental removal and ensure reliable seal without complex assembly.

Integrated PECVD barrier and lubricity layers on medical device contact surfaces extend shelf life while reducing manufacturing complexity.

A single elastic locking body merges mechanical locking, sealing, and needle retraction to reduce part count and cross-infection risk.

A needle guard biased by a coil spring locks over the distal end after use to prevent accidental exposure.

Segmented biopsy valve equalizes pressure between chambers to prevent insufflation loss during endoscopic procedures.

Frusto-conical hub and Luer-lock mechanism reduce dead space to prevent neurotoxin waste during precise unit dosing.

A medical syringe plug features a through-duct for oral or dermal use while blocking injection device connections.

Segmented needle cover uses elastomeric inner shield to seal tip while rigid outer shield aids removal.

A segmented syringe guide with an adjustable depth stop constrains needle penetration length, preventing over-penetration during injection procedures.

UV LED curing and infrared heating replace mercury lamps to eliminate stress cracking in glass syringe assembly.

Syringe adapter merges rear stabilization grip with movable plunger finger grip to enable one-handed operation and reduce outlet velocity during exsanguination.

Parallel tube axis prevents lateral obstruction during puncturing while maintaining aseptic infusion line connection.

Segmented guard housing with dual cap reduces needle-stick risk while simplifying self-administration steps.

A syringe stopper assembly creates a vacuum to evacuate trapped air through a porous barrier.

A compact injector retracts its plunger and needle into a housing for portability.

Nested catheter with expandable sponge ensures uniform chemical distribution while preventing leakage into the vagina.

A concentric dual chamber syringe uses nested plungers and a resealable valve to manage fluid flow within a single barrel.

Movable adaptor collar shifts between positions to enable luer slip or lock connections, preventing obstruction during connector type switching.

Automated injection device uses separate reservoirs and a controller to deliver gas before drug, reducing injection site reactions and contamination risk.

Segmented passive shields lock out after use to eliminate manual re-shielding and prevent accidental needlestick injuries.

A nasal injector connector system uses a luer-lock interface to deliver medicament directly to the sphenopalatine ganglion.