Patents by Inventor Gerd Hoyer

Gerd Hoyer 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).

  • Dental syringe
    Patent number: 4363626
    Abstract: A dental syringe employs a single thumb or finger operated control member mounted on the syringe for regulating the flow of air or water or spray. The single control moves axially and vertically with respect to the syringe. Axial movement either forward or rearward from a rest position, initiates and controls the quantity of flow of air or water. Vertical movement of the control member initiates the flow of both air and water to produce a spray.
    Type: Grant
    Filed: May 15, 1980
    Date of Patent: December 14, 1982
    Assignee: Sybron Corporation
    Inventors: Manfred Schmidt, Gerd Hoyer, Hermann Leiberich, Helmut Pietschmann
  • Foot controller for dental instruments or the like
    Patent number: 4354838
    Abstract: A foot controller for dental instruments having a pair of foot pedals which are depressed to initiate and control the rate of flow of a utility service, there being a single, variable output generator with the controller which can be operated by either the independent or simultaneous operation of the foot pedals.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: October 19, 1982
    Assignee: Sybron Corporation
    Inventors: Gerd Hoyer, Helmut Pietschmann