Location History:
- Heiligenhaus, DE (1984)
- Hattingen, DE (1987 - 1989)
- Wesel, DE (1989)
- Wesel-Obrighofen, DE (1989)
Company Filing History:
7 out of 27 
1 out of 1 Years Active: 1984-1989
Title: Otto Braach: Innovator in Tunnel Excavation Technology
Introduction
Otto Braach is a notable inventor based in Hattingen, Germany, recognized for his contributions to tunnel excavation technology. With a total of seven patents to his name, Braach has made significant advancements in the field, particularly with his innovative earth pressure shield designs.
Latest Patents
Braach's latest patents include a sophisticated earth pressure shield designed for tunnel and gallery excavators. This invention features a front working compartment formed by a separating wall that houses a digging tool. An annular reinforcing space, which is substantially triangular in cross-section, is positioned directly in front of the separating wall. This design allows for a seamless transition from soft earth to hard ground without extensive machine restructuring. The annular reinforcing space is equipped with a lower fluid feeder, a controlled upper pressurized air feeder, and multiple fluid conductor pipes that guide fluid to an upper outlet opening into the working compartment. The invention emphasizes the importance of providing reliable support to the local front wall by ensuring that it can be supplied with fluid.
Another patent by Braach involves an earth pressure shield that contains a front working compartment with a digging tool, formed by a separating wall. This design includes an annular space with a top region connected to a regulated pressurized air feed and a bottom region that is open to the digging tool. This configuration allows for the efficient removal of dug or mined earth material using a conveyor unit. The invention also features a fluid pipe guided from a fluid chamber with a level controller to a fluid outlet that opens to the digging tool, enhancing operational reliability.
Career Highlights
Throughout his career, Otto Braach has worked with several prominent companies, including Hochtief Aktiengesellschaft and Bade & Theelen GmbH. His experience in these organizations has contributed to his expertise in tunnel excavation technologies and innovations.
Collaborations
Braach has collaborated with notable professionals in the field, including Siegmund Hflm Babendererde and Bernd Hillemeier. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Otto Braach's innovative contributions to tunnel excavation technology, particularly through his earth pressure shield patents, demonstrate his significant impact on the industry. His work continues to influence modern excavation practices and showcases the importance of innovation in engineering.