Patents by Inventor Collin M. Smith

Collin M. Smith 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).

  • Aerosol inhalation device
    Patent number: 5385140
    Abstract: A diaphragm valve mechanism comprises a diaphragm valve support structure having passages extending therethrough. Projecting normal to a grid are a number of locating pins which are adapted to extend through holes in the diaphragm valve. The diaphragm valve is formed of flexible material and is provided with a pair of cross slits, each corresponding with the grid bridge element. The central portion of the diaphragm valve is located within a major flow passage whereas the outer peripheral edge portion of the diaphragm valve is located within an exit passage.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: January 31, 1995
    Assignee: Lindrew Pty Limited
    Inventor: Collin M. Smith