Patents by Inventor Roy B. W. Lowndes

Roy B. W. Lowndes 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).

  • Road vehicle halting device
    Patent number: 5536109
    Abstract: A road vehicle halting device comprising a support member, a plurality of support elements, means mounting the support elements on the support member, each supporting element supporting a generally upwardly extending spike, a plurality of downwardly extending road engaging formations, means mounting the road engaging formations on the underside of the support member, the road engaging formations each being configured so that in the event of a vehicle driving over the device, at least one of the formations digs into the ground.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: July 16, 1996
    Inventor: Roy B. W. Lowndes
  • Safety warning lamps for adverse or hazardous atmospheres
    Patent number: 4142179
    Abstract: A warning lamp for use in hazardous atmospheres including three air-filled volumes interconnected by a passageway between screw threads whereby, in the event of an explosion, each of the volumes stores a quantity of explosive gases prior to permitting escape thereof along the passageway between the screw threads thereby providing a warning lamp which causes hot gases to be cooled sufficiently and quenched in the three volumes therein.
    Type: Grant
    Filed: June 10, 1976
    Date of Patent: February 27, 1979
    Inventor: Roy B. W. Lowndes