초록 ▼

An ultrasonic sensor for fluid levels comprises a carrier having spaed-apart legs with registering openings adapted to receive a piezoelectric transmitter and a piezoelectric receiver in the openings. The piezoelectric members are separated by the spaced legs of a ground plane engaging plates of the

An ultrasonic sensor for fluid levels comprises a carrier having spaed-apart legs with registering openings adapted to receive a piezoelectric transmitter and a piezoelectric receiver in the openings. The piezoelectric members are separated by the spaced legs of a ground plane engaging plates of the piezoelectric members. Resilient members in the form of coiled conductors are entrained between a snap-on cover and the transducers so as to resiliently engage the piezoelectric members against the ground plane. The conductors are coupled by crimp connectors to the leads of a cable carried by an elongated channel portion of the carrier. The crimp conenctors are caried in recessed portions of the carrier, and the carrier is over-molded to encase the connectors and the cable. The cable is in turn coupled to an electronic control module positioned remotely from the fluid sump and connected to a warning device.

대표청구항 ▼

In combination with an ultrasonic fluid level sensor having a spaced transmitter piezoelectric member and a receiver piezoelectric member carried in a housing insertable into a fluid reservoir, the improvement comprising: a resilient support for resiliently urging at least one of said piezoelectric

In combination with an ultrasonic fluid level sensor having a spaced transmitter piezoelectric member and a receiver piezoelectric member carried in a housing insertable into a fluid reservoir, the improvement comprising: a resilient support for resiliently urging at least one of said piezoelectric members toward a ground conductor in a relatively fixed position in said housing, whereby ultrasonic damping of said member is reduced.