This inventor holds 6 USPTO granted patents. Top assignee: Grumman Aerospace Corporation. Active years: 1976-1990.
Location History:
- East Northport, NY (US) (1976)
- Huntington, NY (US) (1976 - 1990)
Company Filing History:
Years Active: 1976-1990
Title: The Innovative Contributions of Basil P. Leftheris
Introduction
Basil P. Leftheris is a notable inventor based in Huntington, NY (US), recognized for his significant contributions to the field of engineering. With a total of 6 patents to his name, Leftheris has developed innovative methods that enhance the quality and efficiency of manufacturing processes.
Latest Patents
One of his latest patents is titled "Detection of compressive residual stresses using the method of caustics." This method employs a laser to illuminate an extended crack in stock sheet metallic material. A shadow area image is generated, which has geometrical parameters that can be measured and applied to the calculation of the stress intensity factor (K.sub.I). The variation of the shadow shape in response to specimen loading provides signatures corresponding with the degree and direction of residual stresses in the material adjacent to a hole formed in the material. By determining stress-intensity factors and stress-intensity distributions, a higher degree of quality control for sheet stock material becomes possible, allowing for the assembly of such material in directions that will best counteract anticipated destructive external forces.
Another significant patent is the "Method and apparatus for working a hole." This invention utilizes the stress wave phenomenon for sizing and working a hole in a workpiece. A mandrel of the desired size, shape, and finish is 'driven' into the hole by a stress wave to work the hole and impart a desired shape, size, and finish. Electromagnetic means are used to generate the stress wave, which can be propagated through the mandrel and into the workpiece with sufficient pulse energy level, rise rate, and duration to achieve permanent deformation conforming to the working area of the mandrel. This method allows for the working of straight or tapered holes, and the mandrel can also serve as the fastener for which the hole has been drilled.
Career Highlights
Basil P. Leftheris has made a remarkable impact in his field through his work at Grumman Aerospace Corporation. His innovative approaches have not only advanced manufacturing techniques but have also contributed to the overall efficiency and effectiveness of engineering practices.
Collaborations
Throughout his career, Leftheris has collaborated with esteemed colleagues such as Joseph H. Mainhardt and Walter Schwenk. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.