Company Filing History:
1 out of 194 
3 out of 832,891 Years Active: 1986-2002
Title: Innovations of Steven J Dougherty
Introduction
Steven J Dougherty is an accomplished inventor based in Sumner, WA (US). He holds a total of 4 patents that showcase his expertise in the field of process stream analysis and control. His innovative approaches have significantly contributed to advancements in measuring entrained gas-phase content in liquids.
Latest Patents
One of Dougherty's latest patents is titled "Method and apparatus for control of linear actuation force." This invention focuses on controlling actuation force in apparatus designed to determine the entrained gas-phase content of process streams. The method involves compressing the process stream, measuring its compressive behavior, and calculating the volume of the entrained gas phase. A piston device is rapidly translated into the process stream, where the inertia of the liquid adjacent to the piston compresses the fluid. A pressure sensor at the end of the piston measures the pressure pulse generated by this rapid movement, which is inversely proportional to the entrained gas-phase content. Additionally, an accelerometer within the piston measures its acceleration, allowing for automatic adjustments to maintain constant acceleration despite factors like actuator hysteresis and seal friction.
Another significant patent by Dougherty is "Apparatus for measuring entrained gas-phase content in a liquid." This invention also focuses on determining the entrained gas-phase content of process streams through similar methods of compression and measurement. The apparatus utilizes a piston device that serves as a dynamic containment vessel, compressing the liquid adjacent to it. The pressure sensor measures the pressure pulse, which is then processed to provide output signals suitable for process control.
Career Highlights
Throughout his career, Dougherty has worked with various companies, including International Minerals & Chemical Corporation. His contributions to the field have been recognized for their innovative nature and practical applications in process control.
Collaborations
Dougherty has collaborated with notable individuals in his field, including Ray E Barker. Their joint efforts have furthered the development of technologies related to gas-phase content measurement.
Conclusion
Steven J Dougherty's work exemplifies the spirit of innovation in the field of process stream analysis. His patents reflect a deep understanding of the complexities involved in measuring gas-phase content, making significant strides in the industry.