CASSETTE ASSEMBLY FOR SYRINGE FILL SYSTEM

摘要

A syringe fill system is described, which is useful for filling syringes for dental anesthetic applications. The system incorporates capability for “push-pull”, “pull-push”, “push-push”, and “pull-pull” modes of operation, for loading syringes with compositions comprising multiple fluid components. A syringe Tillable by such syringe fill systems is described, providing haptic and audible feedback to a user, to aid in administering precise amounts of therapeutic compositions. Also disclosed are cassette assemblies for use in such syringe fill systems. Such cassette assemblies may be formed of plastic and elastomeric materials of construction, as disposable or single-use components of the syringe fill system.

主权项

1. A cassette assembly configured for removable installation in a housing in which is mounted a pusher arranged to exert downward pressure on a fluid supply container that is pressure-responsive to dispense fluid to the cassette assembly, the cassette assembly comprising:
a base manifold member including an elongate manifold flow passage; multiple fluid feed inlets extending outwardly from the base manifold member and communicating with the elongate manifold flow passage via inlet passages containing check valves, the multiple inlets being configured for engagement with respective fluid supply containers; and a syringe coupling mounted on the base manifold member, in fluid flow communication with the interior manifold flow passage to deliver fluid from the interior manifold flow passage to a syringe when coupled to the syringe coupling; the multiple fluid feed inlets comprising (i) a first fluid feed inlet configured for engagement with a first fluid supply container engageable with the pusher for push-dispensing a first fluid from the first fluid supply container to the elongate interior manifold flow passage, and (ii) a second fluid feed inlet configured for engagement with a second fluid supply container for pull-dispensing a second fluid from the second fluid supply container to the elongate manifold flow passage; and the check valve in the inlet passage of the first fluid feed inlet and the check valve in the inlet passage of the second fluid feed inlet being configured to provide different crack pressures enabling push dispensing of the first fluid from the first fluid supply container under push-dispensing conditions involving exertion of pressure by the pusher on the first fluid supply container and pull-dispensing of the second fluid from the second fluid supply container under pull-dispensing conditions so that the second fluid intermixes with the first fluid in the elongate manifold flow passage and purges the first fluid from the elongate manifold flow passage during syringe filling.