Patent ID: 11951036
Assignee: HOFFMANN-LA ROCHE, INC.
Field: Measurement (Instruments)
Classification: CPC A  G  B | IPC A

Claim 13:
14. A device for providing a droplet of a liquid stored in an interior of a vial, comprising:
a support body that includes a vial seat arranged to receive the vial, a nozzle, an air flow conduit and a transfer conduit connecting the vial seat with the nozzle;
a resilient dome portion mounted to the support body to form a chamber comprising air, the resilient dome portion being configured to create an air flow with the air in the chamber when compressed by a user and to return to its original shape when released by the user; and
an air permeable and liquid tight filter member separating the chamber from the air flow conduit of the support body, wherein the filter member is arranged as a wall member between the chamber and the air flow conduit,
wherein the support body is arranged such that, when the vial is received by the vial seat,
the air flow conduit establishes a fluid connection between the interior of the vial and the chamber,
the transfer conduit establishes a fluid connection between the vial and the nozzle, and
on activation of the resilient dome portion by compression by the user, the air flow delivers air into the vial such that a pressure rise is created in the interior of the vial which causes liquid to be transferred from the vial to the nozzle through the transfer conduit; and

wherein, after compression and release by the user, re-expansion of the resilient dome portion causes air to be drawn through the nozzle into the interior of the vial and into the chamber.