US Patent No: 4,591,093

Number of patents in Portfolio can not be more than 2000

Calibration apparatus for air flow controllers

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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The present invention calibrates air flow controllers by simulating pneumatic signals present in typical heating, ventilating and cooling systems. The controllers receive pneumatic status signals and in response, operate dampers in the air ducts. Each controller must be set to move the damper among positions for air flow rates between calibrated minimum and maximum air flow positions in the duct. The apparatus connects through air piping to the controller to be calibrated. A variable regulator adjusts a supply of constant pressure air to simulate the pneumatic signal from a thermostat while a second variable regulator simulates the differential pressure signal. Gauges register the simulated signals. A third gauge registers the damper control signal generated by the controller. To calibrate a controller, the thermostat and differential air pressure signals are communicated to the controller. The controller dial is then adjusted to provide a pneumatic signal which operates the damper.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
E-ZEE COMPANYPEARLAND, TX3

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elliott, Jr Alton M Pearland, TX 1 15

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ADVANCED THERMAL TECHNOLOGIES (1)
4,352,349 Control circuit for air conditioning systems 23 1979
 
THERMAL DATA CORP., A CORP OF PA (1)
4,334,275 Energy auditing kit 11 1980

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CARRIER CORPORATION (2)
5,167,366 Duct pressure synthesis for air distribution system 4 1991
6,981,383 Zone damper fault detection in an HVAC system 3 2004
 
Allentown Caging Equipment Co., Inc. (1)
6,408,794 Device for displaying an air flow condition in a rack for animal cages 15 2000
 
Cosmo Instruments Co., Ltd. (1)
5,013,006 Micro-leakage regulating valve 4 1990
 
GOOD DAY TOOLS LLC (1)
7,441,439 Portable pressure switch calibration and diagnostic tool 0 2007
 
GSLE SUBCO L.L.C. (1)
4,798,055 Refrigeration system analyzer 61 1987
 
HONDA MOTOR CO., LTD. (1)
7,331,244 Stamping press line simulation device and method 1 2006
 
INTERNATIONAL COMFORT PRODUCTS CORPORATION (USA) (1)
4,942,613 Service thermostat 50 1988
 
SIEMENS INDUSTRY, INC. (1)
5,705,734 Automated branch flow calibration in a HVAC distribution system 6 1996
 
STARGATE INTERNATIONAL, INC. (1)
7,234,313 HVAC monitor and superheat calculator system 3 2004
 
Tokyo Metropolitan Subway Construction Corporation (1)
5,822,227 Air-conditioning and ventilation simulator in subsurface space 1 1996
 
TRANE INTERNATIONAL INC. (1)
4,838,483 Vav valve control with transducer tolerance compensation 16 1988
 
Other [Check patent profile for assignment information] (3)
5,460,029 Automatic tester and calibrator for instruments or fluid meters 2 1993
7,000,480 Air flow control device with differential pressure sensing assembly and method 6 2004
7,137,567 Thermostat calibration device 2 2004