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| Number | Title | Issue Date |
| 4253156 | Automatic flowmeter calibration system A system for automatically calibrating the accuracy of a flowmeter which is used for measuring the flow of fluid such as gas or liquid flowing therethrough. The system includes a calculator capable of performing mathematical functions responsive to receiv... | 02/24/1981 |
| 4221127 | Flow monitoring Gravity flow of liquid in sewer pipes or similar conduits is determined in the absence of a weir, flume, or similar flow-rating device by sensing the depth of the liquid in the pipe, converting such depth to the corresponding rate of flow through the pipe... | 09/09/1980 |
| 4216673 | Fluid property detection system A differential pressure Ɗp is detected across an orifice plate in a pipe section. The same differential pressure is also allowed to drive a turbine meter. The turbine meter is conventional and produces electrical output pulses at a frequency f1 | 08/12/1980 |
| 4167872 | Data collection and reduction system for a shock suppressor valve test system A data collection and reduction system for a shock suppressor valve test system is provided. The test system includes a flow meter for generating a DC voltage signal corresponding to the velocity of fluid flowing through the flow meter and a recorder for ... | 09/18/1979 |
| 4165640 | Data collection and reduction system for a shock suppressor valve test system A data collection and reduction system for a shock suppressor valve test system is provided. The test system includes a flow meter for generating a DC voltage signal corresponding to the velocity of fluid flowing through the flow meter and a recorder for ... | 08/28/1979 |
| 4145926 | Flow monitoring A method is provided for monitoring liquid flow in an open pipe or conduit wherein sensor means is located adjacent the invert or bed at the inside thereof and the depth of liquid is determined by the bubbler method. To minimize interferences with the liq... | 03/27/1979 |
| 4127030 | Flow measurement Liquid flow through a sewer or water pipe or conduit is measured by admitting the liquid into a confining region of known dimensions from an open end of the pipe or conduit at such rate as to maintain the liquid depth constant in the pipe or conduit and d... | 11/28/1978 |
| 4100797 | Non-invasive method and apparatus for instantaneous flow measurement of a segmented fluid stream Method and apparatus for the determination of the instantaneous flow velocity of a segmented fluid stream in an optically transparent conduit are disclosed, and comprise light-sensitive flow signal generation means operatively associated with said conduit... | 07/18/1978 |
| 4098116 | Liquid flow and volume recording apparatus and method Means for measuring and recording the instantaneous rate of flow of a liquid such as a stream of urine, and an accumulated volume of said fluid. The rate is measured by causing it to flow along a measured sloping channel supported by a deflectable beam an... | 07/04/1978 |
| 4090241 | Method for estimating and controlling the mass flow rate of a free falling fluid stream A mathematical model for estimating the mass flow rate of a fluid stream free falling from an overhead orifice by measuring the stream's diameter is presented. The model is particularly applicable for determining the mass flow rate of a free falling strea... | 05/16/1978 |
| 4058011 | Flow monitoring apparatus A method and portable apparatus for continually monitoring the flow of fluid in an open channel such as in a conduit having a known diameter, a known slope and of material having known surface characteristics. The liquid depth within the pipe is determine... | 11/15/1977 |
| 4051431 | Apparatus for measuring rates of urine flow electrically This invention relates to apparatus for measuring the rate of flow F(t) of urine electrically using a measuring vessel whose filled volume V at any particular time is measured as a function V(t) of time t, so that the rate of flow F(t) = dV/dt of the urin... | 09/27/1977 |
| 4026151 | Measuring device for water flow in a buried pipe A measuring device to determine the depth of sediment in the floor of a buried pipe and the rate of flow of water through the pipe. The device includes a first shaft with a sleeve telescoped on the shaft with the lower end of the shaft being adapted to en... | 05/31/1977 |
| 3965740 | Method and portable apparatus for continually monitoring the flow of fluid in an open channel A method and portable apparatus for continually monitoring the flow of fluid in an open channel, such as in a conduit, having a known diameter, a known slope and of material having known surface characteristics. The liquid depth within the pipe is determi... | 06/29/1976 |
| 3949739 | Spirometer A spirometer has a source of bias gas directly connected to a flow measurement passage so part of the bias gas flows through the flow measurement passage to the atmosphere instead of flowing through a breath transmission passage. In one embodiment, gas st... | 04/13/1976 |
| 3930742 | Velocity probe for compressor surge control A method and apparatus for sensing the velocity of a fluid flow, especially within the boundary layer of a fluid flow path through a compressor. A reference flow under constant pressure is established through an orifice dividing two plenum chambers, and d... | 01/06/1976 |
