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Class Information
Number: 73/1.25
Name: Measuring and testing > Instrument proving or calibrating > Volume of flow, speed of flow, volume rate of flow, or mass rate of flow > Orifice or restriction
Description: Subject matter wherein either (a) the proving or calibrating apparatus or (b) the device being proven or calibrated either comprises (1) an opening sending out a controlled amount of flow of the fluent material or (2) a structure allowing a controlled amount of flow of the fluent material.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7552614 |
System and method for determining functionality or accuracy of a sensor |
Jun. 30, 2009 |
| 7461537 |
Device and method for calibration of a mass flow sensor |
Dec. 9, 2008 |
| 7458394 |
Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve |
Dec. 2, 2008 |
| 7292945 |
Fluid flow measuring and proportional fluid flow control device |
Nov. 6, 2007 |
| 7249486 |
Method for monitoring a sensor |
Jul. 31, 2007 |
| 7210500 |
Methods and apparatus for mechanically adjusting a null offset in a torque motor of a servovalve |
May. 1, 2007 |
| 7055364 |
Exhaust volume measurement device |
Jun. 6, 2006 |
| 6973818 |
Exhaust volume measurement device |
Dec. 13, 2005 |
| 6886534 |
Method for limiting the maximum injection pressure of magnet-controlled, cam-driven injection components |
May. 3, 2005 |
| 6595040 |
Test leak unit |
Jul. 22, 2003 |
| 6470281 |
Method and apparatus for measuring a throttle point |
Oct. 22, 2002 |
| 6425281 |
Pressure insensitive gas control system |
Jul. 30, 2002 |
| 6401525 |
Leak detection in liquid carrying conduits |
Jun. 11, 2002 |
| 5894080 |
Use of a sampling apparatus for calibrating electronic mass/flow fraction meters in a pipeline |
Apr. 13, 1999 |
| 5554805 |
Flowmeter with a variable constriction |
Sep. 10, 1996 |
| 5400639 |
Carrier for mass air flow production line |
Mar. 28, 1995 |
| 5315859 |
Custom flow restrictor |
May. 31, 1994 |
| 5259234 |
Calibration system for air metering bellmouths |
Nov. 9, 1993 |
| 5113705 |
Functional testing of solenoid valves in air |
May. 19, 1992 |
| 5107441 |
System for evaluating the flow performance characteristics of a device |
Apr. 21, 1992 |
| 4879662 |
Fluid flow self calibration scheme |
Nov. 7, 1989 |
| 4838483 |
Vav valve control with transducer tolerance compensation |
Jun. 13, 1989 |
| 4729236 |
Automatic orifice calibrator |
Mar. 8, 1988 |
| 4591093 |
Calibration apparatus for air flow controllers |
May. 27, 1986 |
| 4515012 |
Valve testing system utilizing an artificial atmosphere |
May. 7, 1985 |
| 4502318 |
Method and apparatus for calibrating flow meters |
Mar. 5, 1985 |
| 4432230 |
Method and apparatus for calibrating pumps |
Feb. 21, 1984 |
| 4419898 |
Method and apparatus for determining the mass flow of a fluid |
Dec. 13, 1983 |
| 4366947 |
Calibrated gas-metering apparatus |
Jan. 4, 1983 |
| 4203316 |
Device and method for calibrating pulmonary function testing equipment |
May. 20, 1980 |
| 4194386 |
Variable area metering tube and method of manufacture |
Mar. 25, 1980 |
| 4142401 |
Gage |
Mar. 6, 1979 |
| 4096746 |
Flow controller-flow sensor assembly for gas chromatographs and the like |
Jun. 27, 1978 |
| 4027523 |
Methods and apparatus for proof testing gas meters |
Jun. 7, 1977 |
| 3994153 |
Variable flow resistance calibrator |
Nov. 30, 1976 |
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