Company Filing History:
7 out of 9 
5 out of 8 
1 out of 64 Years Active: 1977-1991
Title: **Innovative Contributions of David W. Wolbrink**
Introduction
David W. Wolbrink is a notable inventor based in Hartford, Wisconsin, recognized for his significant contributions to ventilation technology. With a remarkable portfolio of 15 patents, Wolbrink has made strides in enhancing the efficiency and functionality of ventilation systems, particularly in cooking and bathroom environments.
Latest Patents
Among his latest inventions is the **Downdraft Range Ventilator**, designed for cooking units installed in countertops. This innovative ventilator features a housing that can be mounted beneath the counter, allowing a vent member to move vertically. In its retracted position, the vent member sits flush with the countertop, while in the extended position, it rises above the counter, effectively drawing cooking effluents downward through a blower system. The functionality of this device is further enhanced by a motor-driven roller that manages the vent's movement.
Another significant patent is the **Exhaust Fan for Bathrooms and the Like**. This centrifugal fan is crafted with a unique housing that incorporates an integral centrifugal fan outlet cutoff and a venturi plate. The design optimizes the inlet opening supported by T-shaped struts, which minimizes airflow obstruction and improves fan efficiency. These features demonstrate Wolbrink's dedication to innovation in air management solutions.
Career Highlights
David W. Wolbrink has had a distinguished career, working with prominent companies such as Broan Manufacturing Company, Inc. and Broan Mfg. Co., Inc. His roles in these organizations allowed him to harness his creativity and technical skills, leading to numerous advancements in ventilation technologies.
Collaborations
Throughout his career, Wolbrink has collaborated with noteworthy colleagues including Joseph R. Sarnosky and Dieter W. Otte. These partnerships have likely played a pivotal role in his innovative process, contributing to the development of effective and efficient ventilation products.
Conclusion
David W. Wolbrink's contributions to the field of invention, particularly in ventilation systems, are commendable. His patents reflect a commitment to solving practical problems through innovative designs and engineering solutions. As the demand for efficient ventilation continues to grow, the impact of his work will undoubtedly remain significant in the industry.