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| Number | Title | Issue Date |
| 7114404 | System and method for detecting flow in a mass flow controller Systems and methods are provided for detecting flow in a mass flow controller (MFC). The position of a gate in the MFC is sensed or otherwise determined to monitor flow through the MFC and to immediately or nearly immediately detect a flow failure. In one embodiment... | 10/03/2006 |
| 6955088 | Sensor, particularly a pressure sensor with a sensor fastening device The invention relates to a pressure sensor (1) with a housing (2), a sensor device (4), a sensor fastening device (8, 8b) for fastening the sensor device (4) onto and/or in the front area of the housing (2), and a sea... | 10/18/2005 |
| 6938461 | Constant-head soil permeameter for determining the hydraulic conductivity of earthen materials at a wide range of depths A constant-head soil permeameter for determining hydraulic conductivity of earthen materials is inserted into a borehole at the desired test depth. A calibrated reservoir, disposed on the ground surface, is attached thereto with a suitable length of hose. Water is a... | 09/06/2005 |
| 6860154 | Pressure sensor and manufacturing method thereof It is an object of the present invention to provide a touch mode capacitive pressure sensor having higher pressure durability than conventional sensors. In this invention, a touch mode capacitive pressure sensor has a diaphragm made from boron-doped silicon, and the... | 03/01/2005 |
| 6393908 | Outflow meter A self-contained symmetrical outflow meter for resting on a non-skid surface such as pavement and timing the rate of water drainage from the surface. The outflow meter is characterized by a circular base, a pair of handle supports which extend upwardly fr... | 05/28/2002 |
| 5852240 | Portable flow measuring device A portable secondary flow measuring device (10) with various attachments and adapters for use in several types of open channel flow installations including flumes, weir plates and gravity flow pipelines. A manometer type flow indicating apparatus (40), an... | 12/22/1998 |
| 5844137 | Purge system To measure flow rates, the cross-sectional shape of the flow path is changed by inserting a multiple position gate into the flow path and altering the position of the gate to maintain the head of liquid constant with a reduced flow cross section. The posi... | 12/01/1998 |
| 5639965 | Oil reclamation system flow meter An oil reclamation system flow meter for measuring the flow rate of a oil through the system wherein a housing forms a first chamber that leads through a constricted lower outlet into a second chamber and the second chamber. The first chamber also include... | 06/17/1997 |
| 5280721 | Purge system To measure flow rates, the cross-sectional shape of the flow path is changed by inserting a multiple position gate into the flow path and altering the position of the gate to maintain the head of liquid constant with a reduced flow cross section. The posi... | 01/25/1994 |
| 5275042 | Variable gate flow analyzing method and apparatus To measure flow rates, the cross-sectional shape of the flow path is changed by inserting a multiple position gate into the flow path and altering the position of the gate to maintain the head of liquid constant with a reduced flow cross section. To maint... | 01/04/1994 |
| 4750358 | Flow rate determination A device for determining flow rate of a liquid material that is discharged from an orifice. There is provided a container having a container wall extending upwardly to an open mouth for collection of the discharge from an orifice. The container has a disc... | 06/14/1988 |
| 4554687 | Toilet mounted urine flow meter A urine flow meter including a toilet mounted collector is disclosed. The collector has a mouth portion which is dimensioned to fit within a toilet bowl and which has walls which slope downwardly and inwardly to a neck portion. The neck portion extends do... | 11/26/1985 |
| 4523464 | Flowmeter with no moving parts A simple device for measuring flow rate of liquid in a partially-full pipe. This device comprises a generally vertical, first chamber into which liquid is introduced, a non-opaque, second generally vertical chamber in communication with the lower portion ... | 06/18/1985 |
| 4472967 | Flow controller A fluid sensing apparatus to measure the flow rate of a non-Newtonian fluid by sensing the fluid pressure of the fluid to generate a signal to control a valve. The apparatus includes a fluid receiving chamber which has an outlet tube having a pre-determin... | 09/25/1984 |
| 4433577 | Apparatus for metering liquid flow An inlet tube, connected to a source of liquid, such as milk, supplies liquid to the top of a container. An orifice at the bottom of the container permits drainage from the container into an outlet tube. The level of liquid in the container is related to ... | 02/28/1984 |
| 4142414 | Ultrasonic flow meter This invention relates to an ultrasonic flow meter utilizing a conventional tubular member with an inlet and outlet. An ultrasonic transducer is located in the member to transmit and receive ultrasonic energy through liquid flowing through the member. An ... | 03/06/1979 |
| 4098117 | Open channel flow transducer for sewerage system An open channel flow transducer is provided for measurement of the flow of liquid in a sewer pipe or the like which is not always completely filled. A flow tube which may be of plastic has an upwardly extending discharge region connected to a sewer pipe, ... | 07/04/1978 |
