Patent ID: 9297680
Filing Date: 2016-03-29
CPC Classification: G01F

Claim Text:
1. An ultrasonic flow meter for measuring a flow rate of a liquid based on acoustic wave signals, the ultrasonic flow meter comprising: a casing having therein a passage through which the liquid flows; a pair of detectors that each include an acoustic wave transceiver capable of transmitting and receiving acoustic wave signals, the pair of detectors being arranged in confronting relation to each other in an interior of the casing while sandwiching the passage therebetween; and a pair of port members connected respectively to opposite ends of the casing and through which the liquid is supplied and discharged, wherein the casing, the port members, and the detectors are disposed on a straight line, and in the interior of the casing, the liquid supplied from one of the port members flows through a communication path formed on an outer circumferential side of the detectors and into the passage, and then flows through the passage to another of the port members, wherein each of the detectors includes a holder having a substantially centrally disposed protrusion that protrudes toward the passage, and wherein in an interior of each holder, a propagation member is disposed between the acoustic wave transceiver and the centrally disposed protrusion, wherein the protrusion is formed with a substantially triangular shape in cross section that tapers gradually toward the passage.