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For the Inventor, By the Inventor

Peoria, IL, United States of America

Douglas W Koehler

USPTO Granted Patents = 14

Average Co-Inventor Count = 2.1

ph-index = 8

Forward Citations = 213(Granted Patents)


Location History:

  • Naperville, IL (US) (1997 - 2001)
  • Peoria, IL (US) (2001 - 2014)

Company Filing History:

goldMedal14 out of 9,440 
 
Caterpillar Inc.
 patents

Years Active: 1997-2014

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14 patents (USPTO):Explore Patents
1. 8631650 - Hydraulic system and method for control (2014-01-21),
2. 8171895 - Coolant flow control system and method (2012-05-08),
3. 7926267 - Hystat transmission having pressure override control (2011-04-19),
4. 6609369 - System and method of pressure compensation for electro hydraulic control systems (2003-08-26),
5. 6446433 - Hydraulic control system for improving pump response and dynamic matching of pump and valve (2002-09-10),
6. 6357276 - System and method for calibrating a independent metering valve (2002-03-19),
7. 6257118 - Method and apparatus for controlling the actuation of a hydraulic cylinder (2001-07-10),
8. 6199378 - Off-setting rate of pressure rise in a fluid system (2001-03-13),
9. 6173572 - Method and apparatus for controlling a bypass valve of a fluid circuit (2001-01-16),
10. 5960695 - System and method for controlling an independent metering valve (1999-10-05),
11. 5947140 - System and method for controlling an independent metering valve (1999-09-07),
12. 5878363 - Control to improve dump while lifting (1999-03-02),
13. 5678470 - Tilt priority scheme for a control system (1997-10-21),
14. 5664477 - Control system for a hydraulic circuit (1997-09-09),

Title: Innovations of Douglas W Koehler

Introduction

Douglas W Koehler is a notable inventor based in Peoria, IL (US), recognized for his contributions to hydraulic systems and coolant flow control technologies. With a total of 14 patents, Koehler has made significant advancements in engineering that enhance the efficiency and functionality of hydraulic systems.

Latest Patents

Among his latest patents, Koehler has developed a hydraulic system and method for control, which features at least two hydraulic circuits. This innovative system apportions flow between the circuits based on a constant assumed flow rate, applicable in both power-limited and non-power-limited conditions. Additionally, he has created a coolant flow control system that includes a fluid cooling device, a coolant bypass circuit, and a controller. The controller is designed to generate a control signal that indicates the desired flow of coolant through the bypass circuit, based on the projected rate of change in the cooling device's temperature gradient.

Career Highlights

Koehler's career is marked by his work at Caterpillar Inc., where he has applied his expertise in hydraulic systems to develop solutions that meet industry demands. His innovative designs have contributed to the company's reputation for excellence in engineering and technology.

Collaborations

Throughout his career, Koehler has collaborated with talented individuals such as James Alvin Aardema and John James Krone, further enhancing the innovative environment at Caterpillar Inc.

Conclusion

Douglas W Koehler's contributions to hydraulic systems and coolant flow control exemplify the impact of innovation in engineering. His work continues to influence the industry and improve technological applications.

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