Location History:
- Hollriegelskreuth, DE (1988 - 1996)
- Munich, DE (1983 - 2020)
Company Filing History:
8 out of 2,215 
2 out of 41 
1 out of 4 Years Active: 1983-2020
Title: Innovations of Hans Appel
Introduction
Hans Appel is a notable inventor based in Munich, Germany. He has made significant contributions to the field of suction extraction devices and hand-held power tools. With a total of 11 patents to his name, Appel's work showcases his dedication to innovation and problem-solving in engineering.
Latest Patents
One of Hans Appel's latest patents is a suction extraction device. This device features a fan, a suction head, a channel leading from the suction head to the fan, a dust filter, and a collection container to hold the dust that has been deposited on the dust filter. The suction head includes a tubular cavity arranged around the working axis, which accommodates the connection section of the suction drill bit. A flow sensor is positioned in the cavity, emitting a measuring signal indicative of the air flow striking the sensor surface. An evaluation unit generates an error signal if the measuring signal falls below a threshold value for a specified duration, while a signaling unit displays this error signal to the user.
Another significant patent is for a suction module designed for a hand-held power tool. This module incorporates a motor-driven fan wheel, an intake channel for sucking in dust-laden air, and a collecting container for dust. The flow sensor in this module has a sensor surface made of plastic, which is located in the intake channel. An electric field meter is positioned to determine the electrostatic field strength on the sensor surface, while an evaluating unit calculates the flow rate of dust-laden air based on this electrostatic field strength.
Career Highlights
Throughout his career, Hans Appel has worked with prominent companies such as Hilti Aktiengesellschaft and Peroxid-Chemie GmbH. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Hans Appel has collaborated with notable individuals in his field, including Egon Koenigbauer and Gottfried Brossmann. These partnerships have likely enhanced his work and led to further advancements in his inventions.
Conclusion
Hans Appel's contributions to the field of engineering through his patents and collaborations highlight his innovative spirit and commitment to improving technology. His work continues to influence the development of efficient tools and devices in the industry.