Syringe Applicator Tip for Viscous Fluid Dispensing
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Solution Overview
Problem
Existing medical devices for dispensing viscous fluids, such as adhesives and sealants, often suffer from complexity in manufacture and use, and result in undesirable distribution patterns on target surfaces.
Innovation Solution
A syringe applicator tip with a cannulated spout and a threadedly attached tip body featuring a proximal opening, a dispensing opening, and a lumen extending from the proximal to the dispensing opening, including a sealing surface and a fluid control member for controlled dispensing of viscous materials onto a substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a syringe is used to dispense viscous fluids, then the fluid can be delivered to the target surface, but the distribution of material on the target surface is undesirable
Solution Approach 1:
The applicator tip is segmented into distinct functional zones: a sealing portion with a sealing surface that contacts the syringe barrel, a body portion with a lumen for fluid flow, and a dispensing opening. This segmentation allows each portion to be optimized for its specific function, improving material distribution control.
Solution Approach 2:
The sealing surface is provided locally on the applicator tip where it contacts the syringe barrel, ensuring a secure seal at the connection interface. The dispensing opening is designed with specific geometry (slot or round opening) to control local fluid exit and improve distribution patterns on the target surface.
2Ease of operation
If the applicator tip is loosely attached to the syringe barrel, then it is easy to remove and replace, but fluid pressure can dislodge the tip
Solution Approach 1:
The applicator tip includes a sealing surface and connection geometry that are pre-configured to engage with the syringe barrel in a specific orientation. The threading on the applicator tip allows for preliminary engagement that guides proper alignment before final tightening, ensuring secure attachment that resists fluid pressure.
Solution Approach 2:
The sealing surface on the applicator tip is designed with a curved or tapered geometry that complements the syringe barrel interface. This curved geometry distributes the sealing force evenly and allows for self-aligning engagement, maintaining secure attachment while permitting easy removal when needed.
3Ease of manufacture
If the lumen has a constant cross-section, then manufacturing is simpler, but viscous fluid flow and sealing are compromised
Solution Approach 1:
The lumen cross-section varies locally along its length: it has a larger cross-section in the body portion to accommodate viscous fluid flow, and transitions to a smaller cross-section at the sealing portion to enable effective sealing against the syringe barrel. This local variation optimizes both flow characteristics and sealing performance.
Solution Approach 2:
The lumen parameters (cross-sectional area, shape) are changed along its length to optimize different functions. The sealing surface area and lumen diameter are specifically controlled at the sealing portion to ensure proper sealing, while the body portion has dimensions optimized for viscous fluid flow characteristics.
Data Source
AI summary
The present disclosure provides medical products and methods including an applicator tip for connection to a syringe. The applicator tip is advantageous when dispensing viscous fluids, such as adhesives and/or sealants.