Porter T Mccauley from 509 West Ln, Geneva, IL 60134, Phone: 8474468185

Method Of Calibrating And Determining The Rotational And Fluid Delivery Velocities Of A Peristaltic Fluid Pump
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US Patent:

49106821, Mar 20, 1990
Filed:

Dec 18, 1987
Appl. No.:

7/134832
Inventors:

Donald L. Wolff - Barrington IL
Porter T. McCauley - Northfield IL
Paul Stiefel - Skokie IL
Gyoergy J. Takacs - Wheeling IL
Roman A. Adams - Lincolnshire IL
Assignee:

Cole-Parmer Instrument Company - Chicago IL
International Classification:

F04B 4906
G01F 100
US Classification:

364510
Abstract:

A peristaltic pump controller provides control of a positive displacement pump as either an uncalibrated or calibrated flowmeter, or a calibrated dispenser. A calibration constant is calculated, after the pump is primed, to determine the amount of volume output produced by an increment of angular rotation of the pump. The constant is determined during a calibration operation where an arbitrary calibration volume is metered. The controller has a low flow and high flow mode where the low flow mode provides a higher resolution for dispensing. The flow mode of operation is determined by the value of the calibration constant and is automatically set when the constant is calculated. DUring a dispensing operation, the controller will meter fluid to within a predetermined amount of the final volume dependent upon the speed of the pump motor and then dribble in the remaining amount of a batch for precision.

Control Method And Apparatus For Peristaltic Fluid Pump
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US Patent:

47157860, Dec 29, 1987
Filed:

Dec 14, 1984
Appl. No.:

6/682031
Inventors:

Donald L. Wolff - Barrington IL
Porter T. McCauley - Northfield IL
Paul Stiefel - Skokie IL
Gyoergy J. Takacs - Wheeling IL
Roman A. Adams - Lincolnshire IL
Assignee:

Cole-Parmer Instrument Company - Chicago IL
International Classification:

F04B 4906
US Classification:

417 22
Abstract:

A peristaltic pump controller which provides control of a positive displacement pump as either an uncalibrated or calibrated flowmeter, or a calibrated dispenser. A calibration constant is calculated, after the pump is primed, to determine the amount of volume output produced by an increment of angular rotation of the pump. The constant is determined during a calibration operation where an arbitrary calibration volume is metered. The controller has a low flow and high flow mode where the low flow mode provides a higher resolution for dispensing. The flow mode of operation is determined by the value of the calibration constant and is automatically set when the constant is calculated. During a dispensing operation, the controller will meter fluid to within a predetermined amount of the final volume dependent upon the speed of the pump motor and then dribble in the remaining amount of a batch for precision.