Donald L Zeeland

Title: The Innovative Contributions of Donald L Zeeland

Introduction

Donald L Zeeland is a notable inventor based in Franklin, WI (US). He has made significant contributions to the field of engineering, particularly in the development of controllers for electric clamps. His innovative approach has led to the creation of a patent that enhances the functionality and efficiency of electric clamping devices.

Latest Patents

Donald L Zeeland holds a patent for a "Controller for Electric Clamp." This invention allows the clamp to close rapidly at first, then slow down while contacting the workpiece, and speed up again to apply full clamping force. The controller utilizes a proximity sensor to detect the clamp's position for slowing down, ensuring precise operation. Additionally, the speed of the operation is relatively insensitive to the voltage of its AC electrical power source, thanks to an open-loop compensating signal that controls the pulse duration of rectified DC pulses driving the motor. The controller also features dynamic braking applied between individual pulses of motor current, which significantly increases the swings of current values for a given motor speed, thereby reducing harmful effects of mechanical friction. The design includes two selectable jogging speeds, enhancing its versatility.

Career Highlights

Donald L Zeeland is associated with Eaton Corporation, where he has contributed to various projects and innovations. His work has been instrumental in advancing the technology behind electric clamps, making them more efficient and user-friendly.

Collaborations

Throughout his career, Donald has collaborated with notable colleagues, including Eugene F Duncan and Gregory L Nadolski. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Donald L Zeeland's contributions to the field of electric clamp technology exemplify the spirit of innovation. His patent for a controller not only enhances the functionality of electric clamps but also showcases his commitment to engineering excellence. His work continues to influence the industry and inspire future inventors.