LEAF: leaflet enabled actuation and flow for precise cream and gel dispensing
LEAF offers a mono-material pump design using leaflet-based valves and variable thickness patterning for precise dispensing of creams and gels. Inspired by biological valves, it ensures recyclability and leak-free operation, leveraging proven manufacturing techniques.
Overview
LEAF (Leaflet Enabled Actuation and Flow) is an innovative mono-material pump solution designed for precise and consistent dispensing of creams and gels. Drawing inspiration from biological valve systems like those in veins and hearts, LEAF uses bi- and tri-cuspid leaflet valves to function as a one-way check valve. The pump's design emphasizes sustainability through full recyclability, utilizing shape and structural variations to achieve multiple functions without additives. The incorporation of mature valve technology and interference seals ensures leak-free operation, making it an ideal choice for various dispensing applications.
Technical specifications
- Leaflet-based valve system: Uses bi- and tri-cuspid leaflets to replicate one-way valve functionality, inspired by biomedical devices.
- Interference seals: Provides liquid-tight sealing, similar to those used in disposable syringes.
- Polymer coil springs: Offer spring action without metal components, enhancing recyclability.
- Manufacturing: Geometries are injection moldable, and components are bonded using heat or ultrasonic welding.
- Material: Initial concept validation uses HDPE, with prototypes created via 3D printing for testing.
- Testing and validation: Includes finite element analysis (FEA) for pressure thresholds and fatigue, alongside functional testing of 1 mL and 3 mL pump configurations.
Technology readiness level
Currently at Technology Readiness Level 4, the LEAF pump has undergone concept validation with successful initial testing. Future phases involve creating molded prototypes and conducting comprehensive functional testing to establish core performance metrics and manufacturability, including compatibility with various formulations.
About Northeastern University
Northeastern University is a private, comprehensive R1 research university based in Boston with a global campus network. Its century-old cooperative education model integrates full-time, paid placements with academic study, enabling companies to access vetted talent and long-term pipelines worldwide. Industry collaboration is supported by a suburban innovation campus offering test beds, secure labs, and fee-for-use core facilities, alongside co-located partner spaces. The university attracts competitive federal research funding from agencies such as the NSF and NIH. A dedicated technology transfer office streamlines IP, licensing, and startup formation for corporate partnerships.
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