Abstract: An assembly for an ultrasonic flowmeter apparatus includes a housing having first and second opposite ends, an inlet and an outlet, a tube within the housing to define a passage in the housing, a wall within the housing to support the tube and to partition the housing into first and second plenums which are in flow communication through the passage of the tube and ultrasonic transducers mounted at the opposite ends of the housing to transmit ultrasonic signals in an axial direction through the tube.

Abstract: In a liquid fitting for corrosive liquids under pressure, such as a liquid flow meter having an outer pressure resistant housing in which a measuring chamber housing with a movable measuring element is arranged, the space between the outer housing and the measuring chamber housing is filled with the liquid to be measured with the outer housing provided with a thin walled elastic lining at its inside surfaces forming a hollow wall, and the hollow wall filled with a noncorrosive medium.

Abstract: The invention is directed to an improvement for a fluid-volume apparatus for measuring a fluid under pressure. A measuring chamber housing with a movable measuring part is arranged in a pressure-resistant outer housing. A fluid medium is present in the space between the outer housing and the measuring-chamber housing. The improvement includes separating this space between the measuring-chamber housing and the outer housing from the fluid to be measured in a fluid-tight manner and providing a pressure-responsive element for placing the above-mentioned space between housings in pressure-equalizing communication with the liquid to be measured whereby the pressure of the fluid medium in the space between the housings is at a pressure which corresponds to the pressure of the liquid to be measured.

Abstract: An improved arrangement in a liquid flow meter which contains at least one cylindrical measuring means rotating in a measuring chamber with the measuring means sliding with its one end face against a bottom part of the measuring chamber in which a stable, bell-shaped stiffening element rests against the edge of the bottom part and is arched thereover on the side facing away from the measuring chamber with a rigid connecting member attached to the bottom part and the stiffening element at least in the central region of the bottom part. Preferably support ribs with an external shape corresponding to the inner contours of the bell-shaped stiffening element are connected firmly with the bell-shaped stiffening element.