John B Dunn

Title: John B Dunn: Innovator in Inkjet Technology and Firefighting Training

Introduction

John B Dunn is a notable inventor based in Corvallis, OR (US), recognized for his contributions to inkjet technology and firefighting training methods. With a total of 8 patents, Dunn has made significant advancements that enhance both efficiency and safety in these fields.

Latest Patents

One of Dunn's latest innovations is the "Bottom fill inkjet cartridge through bubble generator." This invention features a disposable or refillable inkjet cartridge equipped with a bubble generator and an adhesively attached vent cover. The design allows for filling through a bubble generator opening at the cartridge's bottom, simplifying the priming operation and eliminating the need for a separate filling orifice. The vent cover's adhesive attachment facilitates easier removal for refilling, addressing potential issues related to welding flash in welded vent covers. The bubble generator's tapered opening receives a ball that interacts with ribs along the opening, creating consistent bubble pressures to maintain back pressure. Additionally, a single piece of tape over the bubble generator and printhead nozzles helps prevent common causes of depriming.

Another significant patent is the "Firefighting training method and apparatus." This apparatus simulates the pumping of water through long lengths of hose, allowing firefighters to practice delivering the correct amount of water without needing a lengthy fire hose. The device includes a disk with one or more apertures that provide resistance to water flow, mimicking the challenges faced when using a long fire hose.

Career Highlights

Throughout his career, John B Dunn has worked with prominent companies, including Hewlett-Packard Company. His work has focused on developing practical solutions that address real-world challenges in both technology and emergency response.

Collaborations

Dunn has collaborated with notable individuals such as Lowell R McDaniel and Ralph L Stathem, contributing to the advancement of his innovative projects.

Conclusion

John B Dunn's inventive spirit and dedication to improving technology in inkjet systems and firefighting training have made a lasting impact. His patents reflect a commitment to enhancing efficiency and safety in critical applications.