Location History:
- Hoisdorf, DE (1995 - 1999)
- Hoisdorf/Hamburg, DE (2000)
- Wiemersdorf, DE (2005)
Company Filing History:
6 out of 19 
1 out of 5 Years Active: 1995-2005
Title: The Innovations of Rolf Johnen: Pioneering Shaft Sealing Solutions
Introduction
Rolf Johnen, an accomplished inventor based in Hoisdorf, Germany, has made significant contributions to the field of sealing technologies. With a total of seven patents to his name, Johnen's innovative designs have paved the way for advancements in the efficient sealing of rotating shafts. His expertise lies particularly in the creation of sealing rings that streamline functionality and enhance performance.
Latest Patents
Among his latest inventions, Johnen has developed two notable patents for shaft sealing rings. The first patent describes a sealing ring that features a sealing lip made from elastomer material, which is flexionally dimensioned to exert sufficient pressure on the sealing section against the shaft surface. This design integrates a cylindrical part that extends the length of the shaft and includes a thread to facilitate the return transport of any discharged medium back to the sealing area when the shaft rotates.
The second patent presents a similarly innovative shaft sealing ring crafted from elastomeric materials or PTFE compounds. This design employs a flaccidly bendable sealing lip, ensuring that the sealing portion engages the shaft's periphery adequately. Endless, undulating return channels are featured throughout the sealing portion, returning any medium that escapes during shaft rotation to the sealed space without communicating with the surrounding environment. Notably, this invention eliminates the need for separate contact pressure mechanisms, enhancing the sealing efficiency.
Career Highlights
Rolf Johnen’s professional journey includes key roles in reputable companies known for their expertise in sealing technology. He has worked with Dichtungstechnik G. Bruss GmbH & Co. KG, along with its partner company, Dichtungstechnik G. Bruss GmbH & Co. His innovative contributions at these organizations have solidified his reputation as a visionary inventor in the sealing solutions sector.
Collaborations
Throughout his career, Johnen has had the opportunity to collaborate with esteemed professionals in the field. Notable coworkers include Jurgen Hering and Gerd Upper, who have worked alongside him to drive innovation in sealing technologies. Their collective experiences and insights have undoubtedly contributed to the success of Johnen's patent endeavors.
Conclusion
Rolf Johnen’s work exemplifies the spirit of innovation critical to advancing technology in sealing solutions. His patents not only reflect his technical prowess but also underscore his commitment to improving the efficiency of industrial applications. As he continues to push the boundaries of what is possible in sealing technologies, Johnen remains a prominent figure in the realm of invention, inspiring future generations of inventors.