Location History:
- Kitchner, CA (1983 - 1984)
- Kitchener, CA (1988 - 2006)
Company Filing History:
3 out of 29 
1 out of 5 
1 out of 61 
Years Active: 1983-2006
Title: The Innovative Contributions of William S. Stumpf
Introduction
William S. Stumpf is a notable inventor based in Kitchener, Canada, recognized for his significant contributions to chair design and functionality. With a total of six patents to his name, Stumpf has developed innovative solutions that enhance user comfort and adjustability in seating.
Latest Patents
One of Stumpf's latest patents is a chair control device for a tiltable chair. This device features a one-piece integral structure mainframe housing that includes an extension for a seat locking cam means, which supports various adjustment mechanisms. The housing is affixed to the underside of the chair's seat and may include a tailpiece bracket for securing the mainframe to the chair's back. Additionally, the device incorporates a tension control means that regulates the resistance of the tilt motion. This mechanism consists of an elongated bolt with a compression spring that adjusts the tension, allowing for controlled tilt functionality. Another notable patent is the chair back height-adjustment mechanism, which allows for incremental adjustments in the height of the chair back relative to the seat. This mechanism utilizes a pinion and rack system to facilitate smooth movement and secure positioning of the chair back.
Career Highlights
Throughout his career, William S. Stumpf has worked with several companies, including Hauserman, Inc. and Ram Machines (1990) Ltd. His experience in these organizations has contributed to his expertise in designing innovative seating solutions.
Collaborations
Stumpf has collaborated with notable individuals in the field, including Gary R. Ludwig and Douglas C. Ball. These partnerships have likely influenced his inventive process and led to the development of his patented technologies.
Conclusion
William S. Stumpf's contributions to chair design through his innovative patents demonstrate his commitment to enhancing user comfort and functionality. His work continues to influence the field of ergonomic seating solutions.