Flow sensor system with absorber
AssigneeCRISI Medical Systems, Inc.
InventorShawn Wayne DeKalb
Life of this patent
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Abstract
A flow sensor sub-assembly for sensing flow of a fluidic medicament includes a flow tube having a flow tube inlet and a flow tube outlet, and an acoustical transmission rate. The medicament flows through the flow tube. A first piezo element is arranged at an upstream position of the flow tube and a second piezo element is arranged at a downstream position of the flow tube, such that the first piezo element and the second piezo element are mounted apart a pre-selected distance from each other. An absorber sheath encircles the flow tube. The absorber sheath has an upstream end and a downstream end. The absorber sheath is comprised of a material with an acoustical transmission rate different than the flow tube.
Claims20
A flow sensor sub-assembly for sensing flow of a fluidic medicament comprising:
- a flow tube having a flow tube inlet and a flow tube outlet, and an acoustical transmission rate, wherein said medicament flows through the flow tube;
- a first piezo element arranged at an upstream position of the flow tube and second piezo element arranged at a downstream position of the flow tube;
- and
- an absorber sheath encircling said flow tube, having an upstream end and a downstream end.
A flow sensor sub-assembly for sensing flow of a fluidic medicament comprising:
- a flow tube sub-assembly having:
- a first flow tube and a second flow tube each having a respective flow tube inlet and a respective flow tube outlet, and an outside diameter, wherein said medicament flows through the flow tubes;
- and
- an absorber sheath connecting said first flow tube outlet to said second flow tube inlet, wherein said medicament flows through at least a portion of said absorber sheath;
- and
- a first piezo element arranged at an upstream position of the flow tube sub-assembly and a second piezo element arranged at a downstream position of the flow tube sub-assembly.
Dependencies are inferred from the claim text.