Calibration apparatus for air flow controllers

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4591093
SERIAL NO

06751285

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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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
E-Zee CompanyPEARLAND, TX0

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elliott, Jr Alton M Pearland, TX 1 19

Cited Art Landscape

Patent Info (Count) # Cites Year
 
THERMAL DATA CORP., A CORP OF PA (1)
* 4334275 Energy auditing kit 14 1980
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (4)
* 5460029 Automatic tester and calibrator for instruments or fluid meters 3 1993
7000480 Air flow control device with differential pressure sensing assembly and method 8 2004
* 2005/0173,548 Air flow control device with differential pressure sensing assembly and method 0 2004
* 7137567 Thermostat calibration device 4 2004
 
INTERNATIONAL COMFORT PRODUCTS CORPORATION (1)
* 4942613 Service thermostat 75 1988
 
CARRIER CORPORATION (3)
* 5167366 Duct pressure synthesis for air distribution system 8 1991
* 6981383 Zone damper fault detection in an HVAC system 7 2004
* 2005/0155,365 Zone damper fault detection in an HVAC system 2 2004
 
TRANE INTERNATIONAL INC. (1)
* 4838483 Vav valve control with transducer tolerance compensation 16 1988
 
Allentown Caging Equipment Co., Inc. (1)
* 6408794 Device for displaying an air flow condition in a rack for animal cages 20 2000
 
Stargate International, Inc. (2)
7234313 HVAC monitor and superheat calculator system 18 2004
* 2006/0090,484 HVAC monitor and superheat calculator system 0 2004
 
HONDA MOTOR CO., LTD. (1)
7331244 Stamping press line simulation device and method 2 2006
 
SIEMENS INDUSTRY, INC. (1)
* 5705734 Automated branch flow calibration in a HVAC distribution system 13 1996
 
HONEYWELL INTERNATIONAL INC. (4)
9500382 Automatic calibration of a demand control ventilation system 0 2010
* 8918218 Demand control ventilation system with remote monitoring 1 2010
* 2011/0264,273 DEMAND CONTROL VENTILATION SYSTEM WITH REMOTE MONITORING 4 2010
9255720 Demand control ventilation system with commissioning and checkout sequence control 0 2010
 
GOOD DAY TOOLS LLC (3)
7441439 Portable pressure switch calibration and diagnostic tool 1 2007
* 2007/0119,225 Portable Pressure Switch Calibration and Diagnostic Tool 3 2007
9640344 Portable pressure switch calibration and diagnostic tool 0 2014
 
Cosmo Instruments Co., Ltd. (1)
* 5013006 Micro-leakage regulating valve 4 1990
 
Tokyo Metropolitan Subway Construction Corporation (1)
* 5822227 Air-conditioning and ventilation simulator in subsurface space 1 1996
 
GSLE SUBCO L.L.C. (1)
* 4798055 Refrigeration system analyzer 84 1987
* Cited By Examiner