Patents by Inventor Carl E. Wilcox

Carl E. Wilcox 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).

  • Ampule for needleless injection
    Patent number: 5503627
    Abstract: A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A two stage power amplifying valve includes a main valve operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to drive a plunger into an ampule to inject an injectant through a patient's skin. Interlocks are provided to resist inadvertent actuation of the device and a indicator indicates whether there is sufficient gas pressure in the device for another injection.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: April 2, 1996
    Assignee: Bioject, Inc.
    Inventors: Charles M. McKinnon, Takaaki Nakagawa, Carl E. Wilcox
  • Needleless hypodermic injection device
    Patent number: 5312335
    Abstract: A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A two stage power amplifying valve includes a main valve operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to drive a plunger into an ampule to inject an injectant through a patient's skin. Interlocks are provided to resist inadvertent actuation of the device and a indicator indicates whether there is sufficient gas pressure in the device for another injection. An ampule for needleless injection has a nozzle length to nozzle diameter ratio of from 2.0 to 5.0 and a throat cone flair angle of from 10-14 degrees.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: May 17, 1994
    Assignee: Bioject Inc.
    Inventors: Charles M. McKinnon, Takaaki Nakagawa, Carl E. Wilcox
  • Needleless hypodermic injection device
    Patent number: 5064413
    Abstract: A needleless injection device has a housing containing a pilot valve connectable to a compressed gas source. A main valve is operatively connected to the pilot valve. The pilot valve and main valve form a two-stage valve with the pilot valve activatable to open the main valve utilizing gas pressure. Compressed gas in a reservoir flows through the open main valve to driven a plunger into an ampule to inject an injectant through a patient's skin.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: November 12, 1991
    Assignee: Bioject, Inc.
    Inventors: Charles M. McKinnon, Takaaki Nakagawa, Carl E. Wilcox