Company Filing History:
3 out of 30 
2 out of 8 
1 out of 4 Years Active: 1976-1991
Title: Innovations of Josef Welzel: A Pioneer in Underground Control Technologies
Introduction
Josef Welzel is a notable inventor based in Wuppertal, Germany, recognized for his contributions to control devices used in underground working environments. With a total of seven patents to his name, Welzel has made significant advancements in the field of electro-hydraulic control systems.
Latest Patents
One of Welzel's latest patents is the "Multipole connector for control devices in underground working." This invention features a sealed lead-through designed for installation through the wall of a control device casing. It includes a contact-holder that is securely fastened in a sealing-tight manner, with multiple contact chambers that house contact elements. These elements are equipped with connecting pieces that extend outward for making connections, characterized by parallel soldering taps.
Another significant patent is the "Method of electro-hydraulic control of longwall mine units." This method automates the control of cutting and self-advancing mine-roof support units based on the measured lengths of the rams. The process involves advancing the conveyor after each extraction cut, ensuring efficient operation of the longwall mining process.
Career Highlights
Welzel has worked with prominent companies such as Hermann Hemscheidt Maschinenfabrik GmbH & Co. and Hermann Hemscheidt Maschinenfabrik GmbH. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of underground control technologies.
Collaborations
Throughout his career, Welzel has collaborated with notable individuals, including Hans Bull and Alfred Maykemper. These partnerships have contributed to the development of his groundbreaking inventions.
Conclusion
Josef Welzel's contributions to the field of underground control technologies through his innovative patents demonstrate his expertise and commitment to advancing mining operations. His work continues to influence the industry and improve safety and efficiency in underground environments.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.