Patents by Inventor Scott H. DeWitt

Scott H. DeWitt 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: 5324267
    Abstract: A check valve for disposable pressure infusion systems having an inflation bulb with a single open end includes a valve body with a pair of intake ports and a discharge port. Disposed at such single open end of the inflation bulb, one of the intake ports permits a flow of pressurizing air from the inflation bulb when squeezed to a pressure cuff through flexible tubing coupled to the discharge port. A flexible diaphragm having slitted openings is disposed within the check valve which provides for opening and closure of a specific port alternatively during squeezes and release of the inflation bulb.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: June 28, 1994
    Assignee: Harmac Medical Products, Inc.
    Inventor: Scott H. DeWitt
  • Patent number: 5025829
    Abstract: A check valve, including an inlet housing portion and outlet housing portion which are adapted to be snap-fit together, is inexpensively and quickly produced using valve disks which are capable of providing variable fluid flow resistance. The valve disk is stamped from flexible materials having a Shore A durometer hardness in the range of from about thirty to about one hundred (e.g., a thermoplastic elastomer). Flat, circular shapes having at least three, arcuately-shaped windows defined therein, with an outer sealing periphery being joined to a circular closing member by webs which separate the windows, provide a valve disk of substantial manufacture ease.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: June 25, 1991
    Assignee: Harmac Medical Products, Inc.
    Inventors: Floyd V. Edwards, Scott H. DeWitt