Patents by Inventor David C. Grimaldi, Jr.

David C. Grimaldi, Jr. 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).

  • Adjustable pneumatic power driving apparatus
    Patent number: 4099659
    Abstract: This invention relates to an improved pneumatic power driving tool for driving staples, nails and other fasteners. The tool is comprised of a pneumatically operated pivoted rectangular hammer which is used as the means for delivering a force to a ram which in turn drives the fastener. The pressure in an air reservoir provides means for determining the impact of the hammer in this tool. A hammer activated valve is employed to index a fastener before a driving force is applied to the fastener by the hammer.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: July 11, 1978
    Inventor: David C. Grimaldi, Jr.