Patents by Inventor Edward H. Friedrich

Edward H. Friedrich 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: 6251658
    Abstract: An inertial impact drill for diverse applications in cytology such as in-vitro fertilization, genetic research, pharmaceutical research, cloning, etc., is designed to operate in conjunction with micropipettes, microelectrodes, and micromanipulators. The drill includes two opposing actuators, one version of which is comprised a plurality of individual piezoelectric elements, the other version is comprised of a plurality of electrostrictive elements. The actuators drive a small inertial mass to produce sharp short reciprocal movements of this mass. The movements of the inertial mass result in repetitive impacts that are transferred to the micropipette or a microelectrode, which is mechanically coupled to the body of the inertial impact drill. In addition, the impacts cause mechanical oscillation of the tip of a micropipette or a microelectrode at its resonant frequency that is higher than the repetition rate of the impacts.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: June 26, 2001
    Assignee: Burleigh Instruments, INC
    Inventors: David A. Henderson, John C. Fasick, III, Robert L. Culhane, Edward H. Friedrich