James R Harnish

This inventor holds 15 USPTO granted patents, primarily in Heat Pump Technology. Top assignees: Borgwarner Inc., Gas Research Institute. Active years: 1977-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: James R Harnish. Retrieved from https://idiyas.com/inventor/james-r-harnish

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 15

% Patents Active = 100.0

Average Co-Inventor Count = 1.2

ph-index = 10

Forward Citations = 275(Granted Patents)

Company Filing History:

Gas Research Institute

patents

Years Active: 1977-1999

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Areas of Expertise:

Heat Pump

Air Conditioning

Microprocessor Controller

Defrosting System

Water Heating

Refrigerant System

Control System

Temperature Compensation

Pressure Compensation

Check Valve

Reverse Cycle

Batch-Type

15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5996367 - Heat pump and air conditioning system compressor unloading method and (1999-12-07),

2. 5628199 - Microprocessor-based controller (1997-05-13),

3. 5438844 - Microprocessor-based controller (1995-08-08),

4. 4590771 - Control system for defrosting the outdoor coil of a heat pump (1986-05-27),

5. 4563877 - Control system and method for defrosting the outdoor coil of a heat pump (1986-01-14),

6. 4558818 - Batch-type water heating apparatus (1985-12-17),

7. 4517807 - Heat pump water heater with supplemental heat supply (1985-05-21),

8. 4498622 - Quick recovery heat pump water heater (1985-02-12),

9. 4314456 - Refrigerant condensing system (1982-02-09),

10. 4265299 - Heat pump control system (1981-05-05),

11. 4221116 - Temperature compensated control for air conditioning system or heat pump (1980-09-09),

12. 4220013 - Pressure compensated control for air conditioning system or heat pump (1980-09-02),

13. 4102390 - Control system for heat pump and furnace combination (1978-07-25),

14. 4100935 - Check valve for heat pump systems (1978-07-18),

15. 4030315 - Reverse cycle heat pump (1977-06-21),

Title: Innovations by James R Harnish

Introduction

James R Harnish is a notable inventor based in York, PA, with a remarkable portfolio of 15 patents. His work primarily focuses on advancements in heat pump and air conditioning systems, showcasing his commitment to improving energy efficiency and system reliability.

Latest Patents

Among his latest innovations is a heat pump and air conditioning system compressor unloading method. This invention optimizes the efficiency of intermittent power generation during heat pump system downtime by incorporating a compressor unloading valve. Additionally, he developed a simplified combustion engine-driven heat pump system that includes electric power co-generation capability. This design allows for electrical power generation benefits while maintaining a smaller, simpler, and more reliable system. Another significant patent is a microprocessor-based controller for heat pump systems. This controller features variable capacity control that responds to thermostat output signals and computes real-time performance parameters under varying heating and cooling load conditions. It also includes a defrost controller that calculates the optimal operating time between defrost cycles, enhancing the overall efficiency of the heat pump system.

Career Highlights

James has had a distinguished career, working with prominent companies such as BorgWarner Inc. and the Gas Research Institute. His contributions to these organizations have significantly advanced the field of thermal management and energy efficiency.

Collaborations

James has collaborated with notable professionals in his field, including Steven R Hoglund and Kerry E Ober. Their combined expertise has contributed to the successful development of innovative technologies in heat pump systems.

Conclusion

James R Harnish's contributions to the field of heat pump technology demonstrate his innovative spirit and dedication to enhancing energy efficiency. His patents reflect a deep understanding of complex systems and a commitment to creating reliable solutions for modern energy challenges.

Profile summary based on public USPTO records.

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]