Patents by Inventor Milton R. Nielsen

Milton R. Nielsen 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: 4074434
    Abstract: A speed control system for dental handpieces in which a sleeve or tube of pliable material defines an elongated deformable passage. The passage communicates at one end with a source of gas (air) under pressure and, at its opposite end, is vented to discharge a continuous stream of gas whenever the unit is in operation. When the resilient sleeve is squeezed anywhere along its length, back pressure is created which acts upon a pressure-responsive pilot valve, the pilot valve in turn regulating the speed of the dental handpiece in accordance with the amount of back pressure developed.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: February 21, 1978
    Assignee: American Hospital Supply Corporation
    Inventors: Milton R. Nielsen, Robert A. Olsen