Peter B Dowden

Title: Innovations by Peter B. Dowden

Introduction

Peter B. Dowden is an accomplished inventor based in Kirkland, WA (US). He has made significant contributions to the field of tunneling technology, holding 2 patents that showcase his innovative approach to engineering challenges.

Latest Patents

One of his latest patents is for a tunneling machine featuring a liquid balance low flow slurry system. This machine is designed to operate in both 'closed mode' and 'open mode', utilizing a rotatable cutterhead with muck openings that communicate with a pressurizable cutterhead chamber. The pressure maintenance system stabilizes the tunnel workface when in 'closed mode', employing low slurry flow to support the unstable tunnel face. The system includes a pressure bulkhead that seals the cutterhead chamber, allowing for the removal of tunneled material through pressurized conveyor means. In 'open mode', the pressure bulkhead is removed, and a second conveyor is used to withdraw cuttings from the cutterhead chamber.

Another notable patent is for a shaft boring machine and method. This machine includes a rotatable cutterwheel assembly mounted on a carriage with vertical travel. The carriage is positioned on a slewing base frame, allowing it to rotate about the vertical axis of the machine. The excavating unit for muck removal loads directly from the shaft bottom into a muck hopper, which is then hoisted to the surface when full. The method involves several steps, including providing a cutterwheel assembly, plunging it into the rock, and removing rock cuttings from the work face.

Career Highlights

Peter B. Dowden is currently associated with The Robbins Company, where he applies his expertise in tunneling technology. His work has significantly advanced the capabilities of tunneling machines, making them more efficient and effective in various geological conditions.

Collaborations

Throughout his career, Peter has collaborated with notable colleagues, including David T. Cass and David B. Sugden. These collaborations have contributed to the development of innovative solutions in the tunneling industry.

Conclusion

Peter B. Dowden's contributions to tunneling technology through his patents and work at The Robbins Company highlight his role as a leading inventor in the field. His innovative designs continue to influence the industry and improve tunneling operations.