Abstract: The present invention relates to a measurement of a flow by the use of Doppler ultrasound, and in particular, by analyzing the spectrum of the reflected ultrasonic signal. The reflected signal is mixed electronically with the transmitted signal in a product detector, demodulator or similar component (250) to produce a signal that is shifted in frequency. In another embodiment, the method includes analyzing the spectrum (280, 300) of the reflected ultrasonic beams by performing the step of: (a) determining a maximum frequency of the detector output signal which is representative of a maximum particle velocity; and (b) calculating a total flow of the particles based on the maximum particle velocity.

Abstract: A dispenser is provided for dispensing liquid soap onto a scrub brush. The dispenser includes a reservoir for holding liquid soap, supporting surfaces for supporting the scrub brush in suspension above the liquid soap in the reservoir. In one embodiment, a carrier for holding the scrub brush is depressed by a downward force. The downward movement of the carrier enables even distribution of the liquid soap through the carrier to thereby coat an operative portion of the scrub brush. In another embodiment, a manually actuated pump dispenses the liquid soap upwardly through the bottom of a well onto the scrub brush.

Abstract: A combination liquid soap dispenser and scrub brush for dispensing a liquid onto a scrub brush or other cleaning implement. The combination liquid soap dispenser and scrub brush includes a container for holding a liquid, a carrier for holding the cleaning implement, and a means to mount the carrier in suspension above the liquid in the container. In use, the carrier with cleaning element is depressed through downward force to the level of the liquid in the container so as to coat the cleaning implement evenly.