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Class 73/1.69 - Using or containing liquid


Subclass of Class 73 - Measuring and testing
Definition: Subject matter wherein either (a) the apparatus proving
No. of patents: 17
Last issue date: 09/25/2007


NumberTitleIssue Date
7272977Dual gauge
A dual gauge assembly. In an exemplary embodiment, the dual gauge assembly includes a housing. Further, a display face is disposed within the housing for displaying a pressure range. In addition, an indicating device is disposed within the housing for indicating pre...
09/25/2007
7189358Integrated micropump analysis chip and method of making the same
An integrated micropump or a plurality of integrated micropumps are communicated to a plurality of analysis chambers. A plurality of integrated analysis chambers include integrated analysis devices to test a fluid for an analyte. The micropumps continuously or perio...
03/13/2007
6568266Pressure housing for in-water pressure based systems
The present invention relates to a pressure housing for in-water pressure based systems and to a method for improving the life of the transducers and electronics of underwater systems by maintaining a humidity-free and clean environment around them by avo...
05/27/2003
6568241Isolated calibration adapter for sterile pressure transducer
A pressure transducer calibration device is disclosed having a housing which defines a first and second chamber separated by a compliant barrier. Two ports are in fluid communication with the first chamber, and one port is in fluid communication with the ...
05/27/2003
5275036Relief valve testing apparatus
An apparatus for testing the opening pressure of a relief valve has a clamp removably secured to the bonnet of a relief valve. The clamp has four upstanding bolts slidably held in T-shaped slots. The bolts mount the base plate of a frame which carries a l...
01/04/1994
5065611System for calibrating the span of pressure measuring instruments
A differential pressure measuring system comprising a transmitter for a pressure-measuring instrument connected to a control room by a two-wire transmission line carrying a d-c signal powered from the control room and representing the measured pressure. T...
11/19/1991
4893494Method and system for testing safety relief valves
A method and system for testing safety relief valves utilizes a reservoir of high pressure fluid which is metered into a smaller pressure vessel in communication with the safety relief valve to be tested. The method and system permits a safety relief valv...
01/16/1990
4776201Method and apparatus for calibrating a differential pressure transducer
A low range differential pressure transducer is connected in a closed fluid system which also contains a U-tube filled with oil in its upper portion and mercury in its lower portion. Under conditions of high line pressure similar quantities of oil are dis...
10/11/1988
4610256Pressure transducer
A pressure transducer which includes a novel apparatus and method for calibrating a pressure transducer to a monitor used in connection with an indwelling catheter to monitor a patient's blood pressure. The pressure transducer includes a transducer diaphr...
09/09/1986
4604891Reference pressure devices for calibrating pressure-measuring instruments
A differential-pressure transmitter having a range diaphragm and a slack diaphragm to receive process pressures and to apply such pressures to an interior sealed chamber containing a fill-liquid. A vertically-oriented tube containing liquid communicating ...
08/12/1986
4562845Methods and apparatus for testing a blood pressure monitoring system of the hydraulic type
The present invention relates to improved apparatus and improved methods for quickly and economically checking the functional performance of blood pressure monitoring systems of the hydraulic type, both prior to and during patient use of the system. More ...
01/07/1986
4552011Establishing a differential pressure across a core sample or calibrating a differential pressure transducer
Transmission and reception of sonic waves and the adjustment of the water level in columns are utilized to establish a desired differential pressure across a core sample. The technique utilized to establish a desired differential pressure across a core sa...
11/12/1985
4495821Magnetostrictive pressure detector
A pressure sensitive, toroidal magnetostrictive core wound with primary and secondary coils providing inputs to self-checking circuitry for analyzing operability status and providing redundant pressure measurement options is described. Pressure sensing as...
01/29/1985
4459841Miniature pressure transducer
In an exemplary embodiment, a measuring cell is disposed in an outer tube. A chamber in the outer tube adjacent the measuring cell can be directly connected via an opening to the liquid in a liquid vessel whose pressure is to be measured. In order to also...
07/17/1984
4380166Testing apparatus for a dual pressure indicator and control unit for pasteurization equipment
The testing apparatus comprises two pressure regulators, two pressure gauges or an optional dual pressure gauge, and valve mechanism. In one embodiment the valve mechanism comprises two valves, namely a power actuated three-way air valve and a power actua...
04/19/1983
4135141Marine seismic streamer with depth sensor calibrating means
A marine seismic streamer section for a towed underwater streamer containing a buoyancy regulating fill liquid and the usual hydrophones, strain cables, signal wires and the like housed in a generally cylindrical tubular jacket sealed at its ends against ...
01/16/1979
4000640Tonometer tester
A device which is designed to test applanation type tonometers. The device includes a reservoir to maintain a constant liquid level mounted on top of a liquid filled vertical column having multiple connections with outlet means closed by thin membranes wi...
01/04/1977
 
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