A Duane Preston

Title: A Duane Preston: Innovator in Carbon Dioxide Dry Cleaning Technology

Introduction

A Duane Preston is a notable inventor based in New Prague, Minnesota, who has made significant contributions to the field of dry cleaning technology. With a total of eight patents to his name, Preston has focused on innovative solutions that enhance the efficiency and effectiveness of dry cleaning processes.

Latest Patents

One of his latest patents is the Carbon Dioxide Dry Cleaning System. This system features a pair of liquid carbon dioxide storage tanks that communicate with a compressor. A sealed cleaning chamber contains the objects to be cleaned. By selectively pressurizing the storage tanks with the compressor, liquid carbon dioxide flows to the cleaning chamber through nozzles, providing agitation for the objects being dry cleaned. The system allows for the return of displaced liquid carbon dioxide back to the storage tanks. In an alternative embodiment, a single storage tank is pressurized with gas from the cleaning chamber, allowing liquid solvent to travel to the cleaning chamber through nozzles. The objects in the cleaning chamber are agitated by a rotating basket. After a prewash cycle, liquid solvent is directed to a still, which may be positioned within the storage tank for efficient heating.

Another significant patent is the Shaft Seal System with Leak Management. This invention involves a cartridge housing that surrounds a shaft for rotating a basket within a pressurized cleaning vessel. The design includes primary and secondary seals that create chambers for lubrication and leak management. Solvent leaking across the primary seal is vaporized and delivered to the primary tank, reducing pressure differentials. The secondary tank operates similarly, ensuring efficient management of solvent leaks.

Career Highlights

Throughout his career, A Duane Preston has worked with several companies, including MVE, Inc. and Chart Inc. His work has focused on developing innovative technologies that improve the dry cleaning industry.

Collaborations

Preston has collaborated with notable individuals in his field, including Jon R. Turner and Charles J. Svoboda. These collaborations have contributed to the advancement of his inventions and the overall progress in dry cleaning technology.

Conclusion

A Duane Preston's innovative work in carbon dioxide dry cleaning technology showcases his commitment to improving industry standards. His patents reflect a deep understanding of the challenges in dry cleaning and offer effective solutions that benefit both consumers and businesses.