Patents by Inventor Richard J. VanPopering

Richard J. VanPopering 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).

  • Pressure sensing syringe
    Patent number: 4759750
    Abstract: A syringe for providing a tactile signal to a person who is directing a fluid to a vein of a patient, for local anesthesia administration where a specific infusion pressure should not be exceeded, and other uses where delivery pressure is critical. A biased pressure sensitive piston is interposed between the syringe plunger and an actuating thumb pressure element. When a preset pressure is reached in the syringe body, a projection reaches the thumb to alert the administering person that the preset pressure has been reached.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: July 26, 1988
    Assignee: DLP Inc.
    Inventors: James H. DeVries, Richard J. VanPopering