A flowmeter for liquids is provided having a through passageway for the flow to be measured with a fluid interaction chamber and feedback means to provide an oscillation of the flow. The frequency of this oscillation is linearly and proportionally related to volume rate of flow and is independent of all fluid properties in the turbulent range, i.e., the frequency for a given volume flow rate will be the same for any liquid as long as the flow is turbulent. Provisions are made for detecting this ...

In a reservoir comprising a container for liquid at least one portion of the top wall of the container is depressed to form a window, the depressed portion and at least a part of the surrounding area being transparent or translucent so that the reservoir can be filled with a liquid until the liquid is in visible contact on the under surface of the window with the surrounding part untouched.

A passive device particularly for the improved measurement of the flow of a liquid is described. The device comprises a conduit defining a flow volume for the internal transit therethrough of a liquid to be received at one open end thereof and discharged from the other open end thereof; means disposed in communication with the interior of the conduit for introducing a preselected tracer substance into liquid flowing (full channel flow) through the flow volume; at least one enclosure having wall ...

A flowmeter for measuring the throughput of a liquid from a source to a load, especially for gasoline, diesel oil, heating oil and the like, comprises at least two measuring cylinders having floating pistons and respective reversing elements which have two positions in which the reversing elements can be temporarily retained. A first reversing element is controlled by the first measuring cylinder and controls the reversal of flow of the liquid to the second measuring cylinder and vice versa. Mea...

A hermetically closed vessel is provided in its top portion with a liquid feed line provided with a check valve and another valve controlled by a float; a compressed air feed line provided with a solenoid valve to control the input of air; and a liquid discharge line extending almost to the bottom of the vessel. A branch located about mid-height in the liquid discharge line is connected to a flexible tube having an open free end attached to a means for regulating the height of the free end. This...

The filter is constructed as a cylindrical or tapered body preferably having longitudinal grooves and ridges as flow channels, the body being made of thin metal, preferably gold plated nickel, to be self-supporting and having perforations to obtain a perviousness from 40 to 200 mesh (metric-DIN). A collar is affixed to suspend the filter in an opening. The filter material is preferably be made by electroplating.

A pump for liquids having a rotor containing a plurality of bores each slidably receiving a piston. The pistons are coupled at one end to means constraining the pistons, when rotating with the rotor, to rotate about an axis spaced from but parallel to the axis of rotation of the rotor whereby the pistons reciprocate in their respective bores so that a pumping action occurs. The rotor is mounted on a hollow shaft for rotation about a first axis, and the outer surface of the shaft is formed with r...

A flowmeter for liquids includes a hollow housing having an internal metering chamber, at least two liquid connections coupled to the housing and communicating with the metering chamber for establishing a liquid flow therethrough, a generally disc-shaped wobble plate having a centrally-disposed spherical wobble center mounted within the metering chamber and non-contacting coacting signal transmitter elements associated with the housing and wobbler plate for generating signals which proportionall...

A closed chamber of a casing contains means forming substantially vertical channels extending completely through the chamber, each channel having a wall of filter material and also having an inlet and an outlet disposed outside the casing. The bottom wall of the chamber slopes downward to a separate outlet for the filtrate which passes through the filter material; and the top wall of the chamber slopes upward toward a separate outlet for a flushing liquid, which is supplied through the outlet fo...

A pump for a liquid comprises a housing a first chamber in the housing, an inlet and an outlet for said front chamber a second chamber in the housing sealingly separated from the first chamber, an electric motor in the second chamber, a third chamber between the first and second chambers, an outlet from said third chamber, a main impeller in the first chamber, an anusiliary impeller in the third chamber to urge any fluid leaking from said first and second chamber to the outlet.