Sandra M Harper

US Patent:

7394244, Jul 1, 2008

Filed:

Oct 22, 2004

Appl. No.:

10/971569

Inventors:

William R. Schley - Rancho Santa Margarita CA, US
Eric B. Chapman - Brea CA, US
Dan Thanh Nguyen - Irvine CA, US
Lawrence P. Flesch - Westminster CA, US
Sandra Lynn Harper - Dana Point CA, US
Curtis Edgar Stevens - Irvine CA, US

Assignee:

Parker-Hannifan Corporation - Cleveland OH

International Classification:

G01B 7/14
G01R 33/069
H01L 43/06

US Classification:

32420724, 3242072

Abstract:

A system and method for measuring the position of at least one field producing element (e. g. , a magnet) without a direct electrical or physical connection between the field producing element and one or more sensors. In one embodiment, the output from an array of sensors (e. g. , Hall Effect sensors) is curve fit using an algorithm having a characteristic bell curve (e. g. , curve fit tracking algorithm, center of gravity algorithm, etc. ) to determine at least one of an absolute or relative position associated with the field producing element and/or a property associated with the field producing element (e. g. , magnetic flux). Another embodiment is directed to detecting errors in one or more of the sensors and excluding the output of the faulty sensors in determining the position associated with the field producing element.

US Patent:

53355130, Aug 9, 1994

Filed:

Jan 19, 1993

Appl. No.:

8/006235

Inventors:

Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Virender Jain - Lake Forest CA
Richard L. Kenyon - Irvine CA
Alan Matthies - Milwaukee WI
Roy M. Yabuki - Los Angeles CA

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F25B 4902
G01D 2502

US Classification:

622283

Abstract:

A heat transfer system includes a high side pressure sensor in the form of a temperature dependent resistance in heat exchange with the system working fluid to locally heat the fluid in response to a control signal. Control means are provided for applying the control signal to the resistance and detecting a minimum thermal resistance between the thermistor and the working fluid.

US Patent:

54603498, Oct 24, 1995

Filed:

Nov 18, 1993

Appl. No.:

8/154674

Inventors:

Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Virender Jain - Lake Forest CA
Richard L. Kenyon - Irvine CA
Alan Matthies - Milwaukee WI
Roger G. Riefler - Brandon MS
Roy M. Yabuki - Los Angeles CA
Ashok Zopey - Anaheim Hills CA

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F16K 3102

US Classification:

25112915

Abstract:

An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation. The proportional solenoid produces force/displacement characteristics which enable precise control of the control element and accurate regulation of the refrigerant flow rate through the valve.

US Patent:

56600526, Aug 26, 1997

Filed:

Jun 2, 1995

Appl. No.:

8/460212

Inventors:

Richard L. Kenyon - Irvine CA
Roy M. Yabuki - Los Angeles CA
Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Michael Nolan - Costa Mesa CA
Virender Jain - Lake Forest CA
Alan Matthies - Milwaukee WI

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F25B 4902

US Classification:

622283

Abstract:

A heat transfer system includes a high side pressure sensor in the form of a temperature dependent resistance in heat exchange with the system working fluid to locally heat the fluid in response to a control signal. Control means are provided for applying the control signal to the resistance and detecting a minimum thermal resistance between the thermistor and the working fluid.

US Patent:

55222315, Jun 4, 1996

Filed:

Jul 26, 1995

Appl. No.:

8/507728

Inventors:

Richard L. Kenyon - Irvine CA
Roy M. Yabuki - Los Angeles CA
Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Michael Nolan - Costa Mesa CA
Virender Jain - Lake Forest CA
Alan Matthies - Milwaukee WI

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F25B 4900

US Classification:

62129

Abstract:

A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor set point when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.

US Patent:

52956563, Mar 22, 1994

Filed:

Oct 15, 1992

Appl. No.:

7/961567

Inventors:

Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Virender Jain - Lake Forest CA
Richard L. Kenyon - Irvine CA
Alan Matthies - Milwaukee WI
Roger G. Riefler - Brandon MS
Roy M. Yabuki - Los Angeles CA
Ashok Zopey - Anaheim Hills CA

Assignee:

Parker Hannifin Corporation - Cleveland OH

International Classification:

F16K 3106

US Classification:

25112902

Abstract:

An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation. The proportional solenoid produces force/displacement characteristics which enable precise control of the control element and accurate regulation of the refrigerant flow rate through the valve.

US Patent:

52896927, Mar 1, 1994

Filed:

Jan 19, 1993

Appl. No.:

8/005606

Inventors:

Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Jain Virender - Lake Forest CA
Richard L. Kenyon - Irvine CA
Alan Matthies - Milwaukee WI
Roy M. Yabuki - Los Angeles CA

Assignee:

Parker-Hannifin Corporation - Cleveland OH

International Classification:

F25B 3904
F25B 4104

US Classification:

62181

Abstract:

A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a s fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor setpoint when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.

US Patent:

54777011, Dec 26, 1995

Filed:

May 3, 1995

Appl. No.:

8/433594

Inventors:

Richard L. Kenyon - Irvine CA
Roy M. Yabuki - Los Angeles CA
Chester D. Campbell - Rancho Santa Margarita CA
Sandra L. Harper - Dana Point CA
Michael Nolan - Costa Mesa CA
Virender Jain - Lake Forest CA
Alan Matthies - Milwaukee WI

Assignee:

Parker-Hannifin Corporation - Clevleand OH

International Classification:

F25B 4104

US Classification:

62225

Abstract:

A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor set point when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.

Author:

Sandra N. Harper

ISBN #:

0669217875