Patents by Inventor Rolf F. K. G. Pfoertner

Rolf F. K. G. Pfoertner 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).

  • Patent number: 6106755
    Abstract: A urethane hammer or other hand-held striking tool having a handle portion cast of a lower durometer, more flexible grade of urethane material, and a head portion which is cast around a metallic weight at the end of the handle portion. The flexible handle absorbs shocks, while the hard material of the head provides a durable, effective striking surface. The tool is cast using a two-stage process. In the first stage, the handle portion is cast with the metal weight located in its end. The handle portion is then placed in a second mold in which the weight on the end of the handle extends into a larger cavity corresponding to the head portion of the tool. The higher durometer urethane material is then cast in this cavity so as to encase the weight and the end of the handle portion.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: August 22, 2000
    Inventor: Rolf F. K. G. Pfoertner
  • Patent number: D438773
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: March 13, 2001
    Inventor: Rolf F. K. G. Pfoertner