Bruce A Krandel

Title: Bruce A. Krandel: Innovator in Mechanical Engineering

Introduction

Bruce A. Krandel is a notable inventor based in Cherry Valley, IL (US). He has made significant contributions to the field of mechanical engineering, particularly in the development of innovative mechanisms for controlling blade pitch and optimizing hydraulic systems. With a total of 3 patents to his name, Krandel's work reflects a commitment to advancing technology in practical applications.

Latest Patents

One of Krandel's latest patents is the "Blade Pitch Change Mechanism." This invention provides a lightweight and compact apparatus for altering and controlling the pitch of multiple rotating blades during operation. It utilizes a mechanical clutch and gear arrangement driven by a rotational speed differential between the blade drive shaft and the blades. The design includes a first set of clutches and gears that manage the direction of rotational power to the pitch change mechanism, which disengages when the desired blade pitch is established. Additionally, a second set of clutches and gears controls the speed of rotational power applied to the mechanism, allowing for both coarse and fine pitch adjustments at variable rates.

Another significant patent is the "System Pressure Compensated Variable Displacement Hydraulic Motor." This invention addresses paper drive unit instability by incorporating a variable displacement hydraulic motor, a rotary output, and a displacement-controlling wobbler. The design features a double-acting hydraulic actuator connected to the wobbler, along with a control valve that manages the speed and direction of the motor output. This system optimizes performance by adjusting the differential pressure setting in response to available system pressure.

Career Highlights

Bruce A. Krandel has spent a considerable part of his career at Sundstrand Corporation, where he has been instrumental in developing innovative solutions in mechanical engineering. His expertise in hydraulic systems and blade control mechanisms has positioned him as a valuable asset to the company.

Collaborations

Throughout his career, Krandel has collaborated with notable colleagues, including Keith E. Short and John E. Ames. These partnerships have fostered a creative environment that has led to the successful development of various engineering solutions.

Conclusion

In summary, Bruce A. Krandel is a distinguished inventor whose work in mechanical engineering has led to significant advancements in blade pitch control and hydraulic systems. His contributions continue to influence the industry and inspire future innovations.