Patents by Inventor Stephen Wayne Smith

Stephen Wayne 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).

  • Liquid sampler
    Patent number: 7121347
    Abstract: A method and an apparatus raise samples of liquid such as water from a low level to a higher level, for example for obtaining a sample of groundwater from a borehole. The apparatus comprises a pair of tubes (14 and 16) extending alongside each other, which are introduced into the borehole, linked by a connector (20) at their lower end, a valve (22) communicating between the inside and outside of one of the tubes (16) near its lower end, and a pig (46) insertable into the tube (16). By adjusting the pressure in each tube at their upper end, the pig (46) can be moved from one end to the other of the apparatus (10) and used to transfer samples of water.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: October 17, 2006
    Assignee: AEA Technology Engineering Services, Inc.
    Inventors: Paul Anthony Murray, Stephen Wayne Smith, Peter Geoffrey Griffiths, Patrick Wakefield Nevins