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Class 73/197 - Compound meter


Subclass of Class 73 - Measuring and testing
Definition: Systems wherein at least two meters are provided, one sensitive
No. of patents: 52
Last issue date: 11/15/2011


  2  
NumberTitleIssue Date
4565098Hybrid sensing system for vortex flowmeter
A hybrid sensing system for a vortex-type flowmeter in which fluidic oscillations are generated at a frequency depending on the flow rate of the fluid being metered, the flowmeter being operative throughout a wide range of frequencies. The system includes...
01/21/1986
4463601Method and apparatus for measuring mass airflow
Where airflow through a system is subject to forward and reverse flow, the mass airflow rate is determined by providing two flow branches A and B meeting at a junction wherein the two branches carry different proportions of airflow in the forward and reve...
08/07/1984
4459860Flow sensor with extended low flow range
In a flow sensing device in which flow is measured by the linear displacement of a moveable bobbin within a throat, the bobbin contains a cylinder and piston arrangement, with the piston linked to the same linear displacement sensing device as the bobbin....
07/17/1984
4437344Compound liquid flow meter with fast crossover characteristic
This compound flow meter includes a high capacity meter and a low capacity meter connected in parallel with it. The flow through the high capacity meter is controlled by a main valve subject to the pressure difference across the meter and biased closed by...
03/20/1984
4429571Compound liquid flow meter
A compound liquid flow meter comprised of a main flow path incorporating a turbine meter (2,36) and a downstream valve (3,24), and a parallel auxiliary low flow path incorporating a relatively small capacity meter (8,41) and a fixed orifice (16,53) discha...
02/07/1984
4386520Flow rate measuring apparatus
A change in the amplitude of the output of a vortex sensor is sensed. When the change exceeds a predetermined value in the region of high engine load, the coefficient of smoothing applied to the output of the vortex sensor is switched to another value, or...
06/07/1983
4217929Flow control composite valve
A compound meter assembly is provided having primary and secondary passageways housing a high flow rate meter and a low flow rate meter, respectively. A composite flow responsive first valve is disposed within the secondary passageway and moves to a subst...
08/19/1980
4175434Compound meter assembly
A compound meter assembly is provided having primary and secondary passageways housing a high flow rate meter and a low flow rate meter, respectively. A flow responsive first valve is disposed within the secondary passageway and moves to a substantially c...
11/27/1979
4142407Air flow metering apparatus for internal combustion engines
An air flow metering apparatus for measuring a suction air flow fed to an internal combustion engine comprises at least two Karman' vortex type air flow meters disposed separately in at least two air suction passages, respectively. The output signals from...
03/06/1979
4111043Turbine flowmeter
A turbine wheel is insertable in a line to intercept fluid flowing therethrough. A pickup coil senses the rotation of the turbine wheel. Responsive to the pickup coil when the rotational speed of the turbine wheel exceeds a predetermined safe limit, it is...
09/05/1978
4100799Compound meter assembly
A compound meter assembly is provided having primary and secondary passageways housing a high flow rate meter and a low flow rate meter, respectively. A flow responsive first valve is disposed within the secondary passageway and moves to a substantially c...
07/18/1978
4100800Flow control assemblies
A compound meter assembly is provided having primary and secondary passageways housing a high flow rate meter and a low flow rate meter, respectively. A composite flow responsive first valve is disposed within the secondary passageway and moves to a subst...
07/18/1978
  2  
 
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