This inventor holds 3 USPTO granted patents. Top assignees: Andritz Inc., Ingersoll-Rand Company, Other. Active years: 1993-2012.
Company Filing History:
1 out of 214 
1 out of 1,201 
1 out of 834,350 Years Active: 1993-2012
Title: John Edward Leddy: Innovator in Filtration Technology
Introduction
John Edward Leddy is a notable inventor based in Amherst, NH (US). He has made significant contributions to the field of filtration technology, holding a total of 3 patents. His innovative designs address critical challenges in the industry, showcasing his expertise and commitment to improving filtration processes.
Latest Patents
One of Leddy's latest patents is the Rotary Drum Vacuum Filter. This invention addresses the limitations of prior art washer designs that utilize segmented radial ducts for filtrate collection. By incorporating a baffle in the radial duct, Leddy's design reduces the volume at the periphery and maintains a uniform cross-sectional area for the filtrate to reach the valve. This innovation ensures a constant filtrate velocity and prevents the formation of air pockets, enhancing the effectiveness of the vacuum.
Another significant patent is the Control System for a Filtrate Splitting Device. This invention features an adjustable splitter valve and control system for pulp washing apparatuses. It automatically regulates the filtrate flow to control characteristics such as volume and dissolved solids. By utilizing a feedback loop to detect control parameters, the system adjusts the filtrate split to accommodate variations in machine operation and feed stock.
Career Highlights
Throughout his career, John Edward Leddy has worked with prominent companies such as Ingersoll-Rand Company and Andritz Inc. His experience in these organizations has allowed him to refine his skills and contribute to advancements in filtration technology.
Collaborations
Leddy has collaborated with notable individuals in the field, including William Frederick Thomson and Alfred F. Blichmann. These partnerships have fostered innovation and the exchange of ideas, further enhancing the impact of his work.
Conclusion
John Edward Leddy's contributions to filtration technology through his patents and collaborations highlight his role as an influential inventor. His innovative solutions continue to shape the industry and improve filtration processes.