Robert J Harter: Self-programmable thermostat. www bobharter, Robert J Harter, August 31, 2010: US07784704 (142 worldwide citation)

A hybrid manual/programmable thermostat for a furnace or air conditioner offers the simplicity of a manual thermostat while providing the convenience and versatility of a programmable one. Initially, the hybrid thermostat appears to function as an ordinary manual thermostat; however, it privately ob ...

Louis E Sulfstede, Robert W Helt, Thomas E Jensen: Refrigeration compressor driven by a DC motor. American Standard, William J Beres, David L Polsley, Robert J Harter, August 15, 1989: US04856286 (102 worldwide citation)

A variable capacity refrigeration system includes a control scheme having three interrelated closed loops. The system includes a refrigeration system controller and at least one variable speed, electronically commutated DC motor driving a compressor. In the first closed loop, the controller supplies ...

James K Yun: Seal indicator for lid and container. Robert J Harter, June 27, 1995: US05427266 (74 worldwide citation)

A lid includes a seal indication window for viewing a corresponding seal indication surface on the rim of a container. This provides a quick visual indication of whether the container is closed properly.

Thomas A Stenger: Wildlife-sensing digital camera with instant-on capability and picture management software. Robert J Harter, December 30, 2008: US07471334 (73 worldwide citation)

An outdoor, battery powered digital camera includes a passive infrared motion detector that allows the camera to be left unattended, as the detector automatically triggers the camera to take a picture upon sensing the presence of a moving animal. To prolong the life of the battery, the camera goes i ...

Mark E Nurczyk: VaV valve with PWM hot water coil. American Standard, William J Beres, Robert J Harter, William O Driscoll, May 29, 1990: US04928750 (64 worldwide citation)

A refrigeration system for temperature conditioning several comfort zones includes several VAV (variable air volume) valves each having a hot water coil conveying water whose flow rate is regulated by a PWM (pulse-width modulated) solenoid valve. Each VAV valve is connected to a supply air duct conv ...

Frederic M Newman: Method of longitudinally splitting a pipe coupling within a wellbore. Robert J Harter, February 24, 1998: US05720344 (61 worldwide citation)

A method of removing a pipe string anchored in cement within a wellbore involves the use of a coupling cutter having a linear charge that is magnetically oriented radially and rotationally within the pipe. The coupling cutter also has a coupling sensor that identifies the location of a coupling elec ...

Tony J Wood: Solenoid valve with supply voltage variation compensation. American Standard, William J Beres, Robert J Harter, David L Polsley, June 13, 1989: US04838037 (58 worldwide citation)

A solenoid valve used as an expansion valve in a refrigeration circuit has an opening that varies as a function of the pulse width of a high frequency PWM (pulse width modulated) control signal. A transistor controls the electrical current delivered to the solenoid valve. The PWM control signal rapi ...

David H Eber, Peter A Kotlarek, Ronald W Okoren: Temperature sensitive solenoid valve in a scroll compressor. American Standard, William J Beres, David L Polsley, Robert J Harter, April 11, 1989: US04820130 (57 worldwide citation)

Inside the hermetic shell of a scroll compressor, a normally closed solenoid valve seats against the back side of a stationary scroll plate to close a discharge opening through the plate. A coil circuit that actuates the valve has an electrical resistance that increases with temperature. The tempera ...

Doyoung Han, Merle A Renaud: Control and method for modulating the capacity of a temperature conditioning system. American Standard, Ronald M Anderson, William J Beres, Robert J Harter, September 1, 1987: US04689967 (57 worldwide citation)

A control and method for varying the capacity of a centrifugal chiller system used to cool a liquid to a setpoint temperature. The control permits the user to select the setpoint, the control gain, and two variables that determine a first deadband and a second relatively wider deadband about the set ...

Paul F Haley, Brian S Junk, Merle A Renaud, Paul C Rentmeester: Centrifugal compressor controller for minimizing power consumption while avoiding surge. American Standard, William J Beres, Robert J Harter, Ronald M Anderson, August 18, 1987: US04686834 (55 worldwide citation)

This controller is used for controlling a centrifugal compressor along its path of minimum power consumption while avoiding a surge condition. It is especially useful in a refrigeration system having a variable speed centrifugal compressor with adjustable inlet guide vanes. In such an application, t ...