Company Filing History:
Years Active: 1979-1987
Title: Douglas J. Harvey: Innovator in Aluminum Casting and Body Solder Technologies
Introduction
Douglas J. Harvey is a notable inventor based in Sterling Heights, MI (US). He holds a total of 11 patents that showcase his contributions to the fields of aluminum casting and body solder technologies. His innovative approaches have significantly improved manufacturing processes.
Latest Patents
One of his latest patents is for a halide treatment for aluminum lost foam casting processes. This invention enhances the casting of aluminum by treating the metal during pattern replacement with a halide salt flux. This treatment inhibits the formation of oxide fold defects, leading to higher quality castings. A preferred flux comprises a mixture of alkaline metal chloride compounds, including aluminum fluoride salt, such as sodium aluminum fluoride. In this embodiment, the flux is incorporated into a polystyrene pattern before embedding it in a sand mold, where it becomes dispersed as the pattern decomposes.
Another significant patent by Harvey is related to a tin-base body solder. This method involves filling depressions in fabricated steel surfaces with a metallic body solder that consists of 15 to 20 weight percent copper, 2 to 3 weight percent zinc, and the balance being tin. The body solder alloy is heated to a temperature above about 210°C to form a workable thixotropic paste, which is then applied to the steel surface. Upon cooling, the body solder forms a dense, tightly adherent fill that is grindable and paintable, seamlessly integrating with the surrounding steel surface.
Career Highlights
Douglas J. Harvey is currently associated with GM Global Technology Operations, Inc., where he continues to innovate and develop new technologies. His work has had a lasting impact on the manufacturing industry, particularly in the areas of aluminum casting and soldering techniques.
Collaborations
Throughout his career, Harvey has collaborated with notable colleagues, including Richard Harry Hammar and William C. Olander. These collaborations have contributed to the advancement of technology in their respective fields.
Conclusion
Douglas J. Harvey's contributions to innovation in aluminum casting and body solder technologies are commendable. His patents reflect a commitment to improving manufacturing processes and enhancing product quality. His work continues to influence the industry positively.