Richard J Mcfarland

Author:

Richard A. McFarland

ISBN #:

0874845009

US Patent:

20060174686, Aug 10, 2006

Filed:

Feb 7, 2006

Appl. No.:

11/348842

Inventors:

Richard McFarland - Cincinnati OH, US
Gene Warren - Cincinnati OH, US

International Classification:

G01L 27/00

US Classification:

073001710

Abstract:

An apparatus for calibration and testing of pressure switches which are typically used in residential and commercial HVAC systems. The apparatus can be used to test, set or adjust a pressure switch to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch, a vacuum nozzle, a pressure nozzle, and a bypass control valve mounted thereon, with the inside of the housing including an air compressor in communication with the nozzles and the bypass control valve. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity meter are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can be constructed as a compact, hand-held instrument for use in an HVAC service environment, and can include the pressure measuring device and the conductivity meter within its housing.

US Patent:

20070119225, May 31, 2007

Filed:

Jan 26, 2007

Appl. No.:

11/627530

Inventors:

Richard McFarland - Cincinnati OH, US
Gene Warren - Cincinnati OH, US

International Classification:

G01D 18/00

US Classification:

073001010

Abstract:

An apparatus for calibration and testing of pressure switches which are typically used in residential and commercial HVAC systems. The apparatus can be used to test, set or adjust a pressure switch to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch, two vacuum nozzles, and a bypass control valve mounted thereon, with the inside of the housing including an air compressor in communication with the nozzles and the bypass control valve. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity indicator are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can be constructed as a compact, hand-held instrument for use in an HVAC service environment, and can include the pressure measuring device and/or the conductivity indicator within its housing.

US Patent:

20170191896, Jul 6, 2017

Filed:

Mar 21, 2017

Appl. No.:

15/464467

Inventors:

Richard Dean MCFARLAND - Cincinnati OH, US

International Classification:

G01L 27/00
H01H 35/24

Abstract:

An apparatus for calibration and testing of pressure switches which are used in residential and commercial HVAC systems. The apparatus can be used to test, set, or adjust a pressure switch or a pressure signal transducer to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch and at least one vacuum inlet nozzle, and the inside of the housing includes an air compressor to which the amount of voltage supplied can be manually controlled. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity indicator are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can include the pressure measuring device and/or the conductivity indicator within its housing.

US Patent:

20150228422, Aug 13, 2015

Filed:

Feb 7, 2014

Appl. No.:

14/175188

Inventors:

Richard Dean MCFARLAND - Cincinnati OH, US

International Classification:

H01H 11/00

Abstract:

An apparatus for calibration and testing of pressure switches which are used in residential and commercial HVAC systems. The apparatus can be used to test, set, or adjust a pressure switch or a pressure signal transducer to the manufacturer's specifications. The apparatus includes an exterior housing with an on/off switch and at least one vacuum inlet nozzle, and the inside of the housing includes an air compressor to which the amount of voltage supplied can be manually controlled. The air compressor typically operates from a battery power supply located within the housing. A pressure measuring device, such as a differential pressure gage, and a conductivity indicator are typically used in conjunction with the device to calibrate adjustable pressure switches and to test and diagnose faulty pressure switches. The apparatus can include the pressure measuring device and/or the conductivity indicator within its housing.