Patents by Inventor Daniel P. Simpson

Daniel P. Simpson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20120260553
    Abstract: An insert assembly for a weapon is disclosed. The weapon may be a rifle, such as an M4 carbine. The insert assembly is configured to support a bolt while the bolt moves during recharging and firing cycles. The insert may be configured to continuously press on an upper receiver when the rifle is assembled. These features improve shooting accuracy of the rifle by minimizing and/or making consistent movements of the rifle's internal components (i.e., there is less wobbling of the components with respect to each other). The insert assembly may include a support plate and a hollow protrusion rigidly attached to the plate. A piston and a spring are inserted into the protrusion. The piston slides within the protrusion and is pushed against the bolt of the rifle by the spring.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Inventors: William G. Gnesda, James J. Farquhar, Daniel P. Simpson, Rob Golden