Company Filing History:
2 out of 125 
1 out of 308 
1 out of 1,661 
Years Active: 2000-2011
Title: Rollin C Christianson: Innovator in Displacement Measurement and Hydraulic Control
Introduction
Rollin C Christianson is a notable inventor based in Delafield, WI (US). He has made significant contributions to the fields of displacement measurement and hydraulic control systems. With a total of 3 patents, Christianson has demonstrated his expertise and innovative spirit throughout his career.
Latest Patents
One of Christianson's latest patents is a displacement measurement device. This device utilizes an electromagnetic field sensor to obtain displacement measurements of a movable member without the need for the sensor to move relative to the electromagnetic field source. The sensor detects disruptions in the electromagnetic field caused by the movement of the member, providing an output that indicates the position of the actuator.
Another significant patent is for a control apparatus for hydraulic cylinders. This invention features cushion chambers located near both ends of a hydraulic cylinder to regulate the inflow or outflow of operating oil as the piston approaches the stroke end. The system includes pressure sensors to monitor pressures in the cushion chambers and a control valve that manages the supply and drainage of operating oil. A controller adjusts the valve's opening based on sensor outputs, allowing for precise control of the piston’s deceleration within the stroke end range.
Career Highlights
Throughout his career, Christianson has worked with prominent companies such as Husco International, Inc. and Kayaba Industry Company, Ltd. His experience in these organizations has contributed to his development as an inventor and innovator in his field.
Collaborations
Christianson has collaborated with talented individuals, including Raud A Wilke and Leif Pedersen. These partnerships have likely enriched his work and led to further advancements in his inventions.
Conclusion
Rollin C Christianson is a distinguished inventor whose work in displacement measurement and hydraulic control has made a lasting impact. His innovative patents and collaborations reflect his commitment to advancing technology in these areas.