Location History:
- Bloomington, MI (US) (1987)
- Bloomington, MN (US) (1981 - 1992)
Company Filing History:
Years Active: 1981-1992
Title: **Innovations by David A. Christiansen: A Look into His Patents and Career**
Introduction
David A. Christiansen, a distinguished inventor located in Bloomington, MN, has made significant contributions to the field of refrigeration technology. With a total of six patents registered to his name, Christiansen's work primarily focuses on operational methodologies that enhance the efficiency and effectiveness of refrigeration systems.
Latest Patents
Among his noteworthy inventions, two patents stand out for their innovative approaches. The first, titled "Method of Operating a Transport Refrigeration System," details a process where a compressor is driven by a prime mover at selected high and low speeds. This system includes an evaporator and an evaporator blower, with a clever refrigeration control mechanism that maintains the temperature of a load space at a predetermined set point. Key steps include high-speed compressor operation during pull-down periods and the injection of hot gas into the evaporator, optimizing temperature management across the entire load space.
The second patent, "Method of Determining Refrigerant Charge," presents a method for assessing whether the refrigerant charge in a refrigeration system remains within acceptable limits. This involves creating a model evaporator temperature-versus-time signature for a system known to have a recommended refrigerant charge level. By isolating an evaporator and analyzing the behavior of the cooling cycle, Christiansen's method establishes a robust testing protocol that ensures system reliability.
Career Highlights
David A. Christiansen is an employee of Thermo King Corporation, a prominent player in the transport refrigeration industry. His career reflects a strong focus on practical solutions that advance refrigeration technology, exemplifying his commitment to innovation. With his expertise, Christiansen plays a vital role in enhancing the operational standards of refrigeration systems.
Collaborations
Throughout his career, Christiansen has collaborated with several professionals, including Lowell B. Naley and Gregory R. Truckenbrod. Such collaborations have fostered a productive environment where inventive ideas can flourish and lead to significant advancements in technology.
Conclusion
David A. Christiansen's innovative patent contributions have significantly impacted the refrigeration technology landscape. His methods reflect a deep understanding of system efficiencies and operational control, showcasing the importance of inventors like him in creating solutions for everyday challenges. As he continues his work at Thermo King Corporation, the future holds promise for further advancements driven by his inventive spirit.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.