AU2011238914A1 — Delivery system for dispensing metered volumes of pure or sterile flowable substances

USPTO Abstract

A sealed delivery system for dispensing metered volumes of a pure or sterile flowable substance is presented. In exemplary embodiments of the present invention, a handheld sealed delivery system comprises a continuously sealing one-way valve assembly at a distal end, and a volume reducing reservoir at a proximal end. The pure or sterile flowable substance can be stored in the volume reducing reservoir. In operation, a user pushes down upon a push button driven actuator assembly, acting upon a metering pumping chamber, which is in fluid communication with the pure or sterile flowable substance stored in the volume reducing reservoir via a check valve. Depression of the push button driven actuator causes a dispensing pump to push a metered volume of flowable substance through the continuously sealing one way dispensing valve assembly.