Robert L Kramer

Title: Innovations of Robert L. Kramer

Introduction

Robert L. Kramer is a notable inventor based in Minneapolis, MN, with a total of six patents to his name. His work primarily focuses on advancements in ammunition technology, showcasing his expertise in the field.

Latest Patents

One of Kramer's latest patents is a shotshell that features pellets of different densities arranged in stratified layers. This innovative design enhances effectiveness at both close and long ranges. The more dense pellets, typically made of tungsten, are positioned at the rear, maintaining a tighter pattern over longer distances. In contrast, the less dense steel pellets are located forward, creating a wider spread that is more effective at close range. Another significant patent is for a non-toxic rim-fire primer. This lead-free primer utilizes cupric azide as the primary explosive, offering a safer alternative to traditional lead styphnate. The formulation includes nitrocellulose, tetracene, fine particles of ground glass, and a binder, ensuring the required sensitivity and stability for commercial rim-fire ammunition.

Career Highlights

Throughout his career, Robert L. Kramer has worked with various companies, including Federal-Hoffman, Inc. His contributions to the field of ammunition technology have been recognized and valued, leading to multiple patents that reflect his innovative spirit.

Collaborations

Kramer has collaborated with notable individuals in his field, including Jack A. Erickson and John M. Hallis. These partnerships have likely contributed to the development of his patented technologies.

Conclusion

Robert L. Kramer stands out as an influential inventor in the realm of ammunition technology. His innovative patents demonstrate a commitment to enhancing safety and effectiveness in the industry.