Donald E Rasmussen

Title: Innovations by Donald E. Rasmussen in Mine Shaft Lining

Introduction

Donald E. Rasmussen is an accomplished inventor based in Spokane, WA (US). He is known for his innovative contributions to the field of mining, particularly in the method of lining vertical mine shafts with concrete. His work has significantly improved the efficiency and safety of mine operations.

Latest Patents

Rasmussen holds a patent for a method of lining a vertical mine shaft with concrete. This invention includes a cylindrical retainer form that is spaced inwardly from the wall of the shaft, allowing for the desired thickness of the liner to be poured. The design features overlapping edges that seal against concrete flow while permitting the form to contract after the liner has hardened and become self-supporting. An inflatable toroid forms a seal between the curb ring and the shaft wall, enhancing the effectiveness of the lining process.

Career Highlights

Throughout his career, Rasmussen has made significant strides in mining technology. His patent, which is one of his notable achievements, showcases his ability to address complex challenges in the industry. The apparatus he developed includes a form support gripper ring that utilizes hydraulic power to engage the shaft wall, ensuring stability during the pouring process.

Collaborations

Rasmussen has collaborated with notable individuals in the field, including Joseph M. Halter and Robert B. Moffat. Their combined expertise has contributed to the advancement of mining technologies and practices.

Conclusion

Donald E. Rasmussen's innovative approach to mine shaft lining has made a lasting impact on the mining industry. His patent demonstrates a commitment to enhancing safety and efficiency in mining operations. His contributions continue to influence the field and inspire future innovations.