Ultrasonic flow sensor system including a flow tube with an absorber sheath encircling the flow tube
AssigneeCRISI Medical Systems, Inc.
InventorShawn Wayne DeKalb
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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.
Claims19
A flow sensor sub-assembly comprising:
- a flow tube;
- and
- an absorber sheath on said flow tube, wherein said absorber sheath is comprised of a material with an acoustical transmission rate different than an acoustical transmission rate of said flow tube.
A flow sensor sub-assembly comprising:
- a flow tube sub-assembly having:
- a first flow tube and a second flow tube;
- and
- an absorber sheath on each of said first flow tube and said second flow tube.
Dependencies are inferred from the claim text.