Flow Sensor System Including Transmissive Connection

摘要

A flow sensor sub-assembly includes a flow tube having a lumen, an outside diameter, a first end, and a second end. An inlet fitting includes a conical orifice sized for insertion in either end of the flow tube, such that an internal passage of the inlet fitting is coaxial and concentric with the lumen and the end of the flow tube abuts a shoulder. An outlet fitting includes a conical orifice sized for insertion in either end of the flow tube, such that an internal passage of the inlet fitting is coaxial and concentric with the lumen and the end of the flow tube abuts a shoulder. A first piezo element integrated with the inlet fitting is arranged at an upstream position of the flow tube assembly and a second piezo element integrated with the outlet fitting is arranged at a downstream position of the flow tube assembly.

主权项

1. A flow sensor sub-assembly for sensing flow of a fluidic medicament comprising:
a flow tube assembly through which said medicament flows having:
a flow tube having a lumen, an outside diameter, a first end, and a second end;an inlet fitting having a conical orifice with a shoulder, said shoulder having a matching size and orientation to match an end of said flow tube, wherein said conical orifice is sized for insertion of either end of said flow tube, such that an internal passage of said inlet fitting is coaxial and concentric with said lumen and said end of said flow tube abuts said shoulder;an outlet fitting having a conical orifice with a shoulder, said shoulder having a matching size and orientation to match an end of said flow tube, wherein said conical orifice is sized for insertion of either end of said flow tube, such that an internal passage of said outlet fitting is coaxial and concentric with said lumen and said end of said flow tube abuts said shoulder; and a first piezo element arranged at an upstream position of the flow tube assembly and a second piezo element arranged at a downstream position of the flow tube assembly, such that the first piezo element is integrated to said inlet fitting and the second piezo element is integrated to said outlet fitting and each piezo element is spaced apart a pre-selected distance from each other, wherein each of said conical orifices has an inner diameter and a taper to engage the outside diameter of said flow tube thereby allowing capillary insertion of an adhesive during assembly.