Michael Dennis Nolan

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:

51448017, Sep 8, 1992

Filed:

Apr 28, 1989

Appl. No.:

7/345156

Inventors:

Dino Scanderbeg - Laguna Niguel CA
William D. Wilkerson - Newport Beach CA
Richard L. Kenyon - Irvine CA
Michael E. Nolan - Costa Mesa CA

Assignee:

Parker Hannifin Corporation - Cleveland OH

International Classification:

F16D 3102

US Classification:

60475

Abstract:

An electro-hydraulic actuator having an electric motor disposed in a hydraulic fluid reservoir and connected to drive a hydraulic fluid pump. The actuator includes a piston rod which extends or retracts as a piston is hydraulically driven in a cylinder. An actuator housing forms the reservoir and cylinder and contains hydraulic passages connecting the pump, reservoir and cylinder. The actuator includes a one-way filter for filtering the hydraulic fluid. The hydraulic pump is preferably a rotating piston type and includes a port plate which allows the pump to drive the piston while the retract and extend chambers of the pump have different or unbalanced fluid drive ratios. A load limiting valve protects the system from excessive hydraulic pressure and a position sensor detects the position of the piston rod.

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.