Infusion Needles TRIZ Cases

A piercing conduit uses a one-way valve and middle aperture to enable painless medication delivery.

A needle assembly uses a rotor with a restriction portion to lock the protection member, preventing re-displacement during intradermal injection.

A retractable syringe plunger incorporates a pneumatic air space to regulate needle retraction speed.

Radial protrusions move springs distally to lock sheaths over needles, preventing reuse and maintaining clear visibility for precise injection.

A syringe barrel integrates a flange lock that engages a plunger rod locking flange to prevent removal after injection.

A parallel linkage converts linear actuator motion into transverse needle movement for precise insertion.

A reversible lock holds the shield in place without manual intervention, resolving the trade-off between ease of operation and stability.

Ohmic heating softens phlebotomy needle tips while axial compression deforms them into blunt balls, reducing sharps bin volume.

A slidably movable safety shield for medical needles resets via a dedicated device to protect the needle tip.

Marked needle and plunger components enable controlled placement of flexible medical devices at variable depths, reducing tension on the device.

Segmented protective sleeves with embedding protrusions lock securely around the needle to prevent accidental exposure.

Stabilizing section contacts skin before needle tip insertion to secure depressing force and puncture speed for reliable upper layer drug delivery.

Protective sheath guides cannula through distinct retracted and ejection positions to prevent needlestick injuries during syringe use.

A hinged needle shield uses a living hinge to pivot the protective portion, enabling one-handed operation.

Offset slit connections in a tubular needle tip protector prevent wing return and accidental puncture during improper insertion orientation.

An interference fit prevents adhesive contamination of medicaments while the bond secures the connection for simultaneous multi-drug delivery.

A needle shield remover uses a spring-loaded anchor to grip the shield for controlled extraction.

A retrieval tool uses a deformable conical tube to wedge and secure sharp medical needles during separation from syringes.

Segmenting the safety mechanism into distinct engagement zones prevents premature triggering during fluid aspiration.

A hinged needle shield pivots to cover the cannula using an over-center hinge mechanism.

A needle cutting device uses a housing wall to push a blade support portion radially for precise injector needle trimming.

A medicament delivery device uses a flexible arm engaging a radially-extending ramp to secure the needle cover in a holding position during dispensing.

A handheld removal tool uses a pull ring to engage and extract needle shields from syringe assemblies.

Deformable ribs engage the syringe carrier to provide adjustable resistance, resolving the trade-off between secure retention and ease of operation.

A safety pen needle assembly uses a biasing element to urge a second shield proximally over the proximal needle end.

Elastic ribs on a polymeric sheath automatically reenclose the needle tip after use, preventing inadvertent sticks without complex manual deployment mechanisms.

Segmented shields protect healthcare workers from needlestick injuries during disposal without manual intervention.

An inner and outer shield design with radial undercuts reduces pull-out force, preventing needle bending and user injury during removal.

A sliding shield covers the needle tip while a radial locking tang secures it, enabling reliable one-handed operation.

A segmented plunger combination with a flexible tip enables one-handed operation across various force-exerting angles for non-liquid material injection.

Segmented check valves prevent blood backflow under pressure, maintaining infusion reliability without blockage.

A safety needle design uses a ratchet and compression spring to permanently deform the cannula after injection.

Segmented catch portions on the base and housing engage externally to retain the assembly without piercing the wall, preventing contaminated fluid exposure.

A pen needle tip uses a locking member and safety cover to prevent re-installation and reduce inadvertent needle pricks.

Hollow rubber piston and cross-shaped stop piece reduce activation force, preventing painful deformation during self-destruction.

A hinged shield assembly uses a ball-and-socket hinge to pivotably secure the shield to the needle hub for reliable coverage.

A resilient portion flexes radially to support a medicament container within a delivery member cover.

Expanding the pen needle hub surface area reduces skin pressure during injection while repositioning adhesive on the outer wall accelerates UV curing.

A closure assembly merges a tip cap and indicator member for concurrent removal from an outer sleeve.

Combined axial-rotational movement reduces removal force while preventing reverse rotation to ensure safe cap detachment.

A keyway mechanism with a guide member and spring retracts the needle to prevent accidental exposure.

Segmented cover assembly with trans-axially aligned closure clasp prevents unauthorized access while locking tabs provide visual tamper evidence.

A dual lumen cannula manages fluid injection through an inner channel while outer egress ports release excess pressure from the injection site.

A syringe and conduit combination uses abutments to limit plunger travel and minimize dead space between slip fittings.

A flexible injection-needle cover uses an easy sliding portion to extend smoothly along the needle shaft.

A syringe assembly deploys a protective sleeve over the needle using spring bias and bendable hooking means.

Hinged support segments pivot to level the cannula holder on uneven skin, reducing device complexity while maintaining secure attachment.

A prefilled syringe package embeds the tip cap in a receiving element to detach it during retrieval.

Aligned retracted positions eliminate backtracking movements, reducing needlestick injury risk.