Patents by Inventor Dwight David Johnson

Dwight David Johnson 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: 6848856
    Abstract: A pylon or barrier arrangement which is recessed into the ground or other surface and includes a post-like pylon which is movable between an extended position for control of vehicular or pedestrian traffic, and a retracted position beneath the ground. Movement of the pylon is achieved by a linear-type drive mechanism which acts as a clutch by decoupling from an upright and rotatable smooth drive shaft during abrupt downward driving of the pylon to avoid damage to the internal components of the arrangement. A sealing arrangement is provided for preventing the entry of debris into the interior of the pylon arrangement, and a heating unit is provided for preventing seizure of the arrangement during harsh weather conditions.
    Type: Grant
    Filed: August 20, 2003
    Date of Patent: February 1, 2005
    Assignee: National Sign & Signal Co.
    Inventor: Dwight David Johnson
  • Publication number: 20040151542
    Abstract: A pylon or barrier arrangement which is recessed into the ground or other surface and includes a post-like pylon which is movable between an extended position for control of vehicular or pedestrian traffic, and a retracted position beneath the ground. Movement of the pylon is achieved by a linear-type drive mechanism which acts as a clutch by decoupling from an upright and rotatable smooth drive shaft during abrupt downward driving of the pylon to avoid damage to the internal components of the arrangement. A sealing arrangement is provided for preventing the entry of debris into the interior of the pylon arrangement, and a heating unit is provided for preventing seizure of the arrangement during harsh weather conditions.
    Type: Application
    Filed: August 20, 2003
    Publication date: August 5, 2004
    Applicant: National Sign & Signal Co.
    Inventor: Dwight David Johnson
  • Patent number: 6719374
    Abstract: A wheel balancing device including at least two ballast chambers, each of which defines an interior cavity therein. A movable medium or ballast is contained within each of the interior cavities and is freely movable within the respective ballast chamber. An annular attachment device is provided to secure the ballast chambers to the wheel.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: April 13, 2004
    Inventor: Dwight David Johnson
  • Patent number: 6626606
    Abstract: A pylon or barrier arrangement which is recessed into the ground or other surface and includes a post-like pylon which is movable between an extended position for control of vehicular or pedestrian traffic, and a retracted position beneath the ground. Movement of the pylon is achieved by a linear-type drive mechanism which acts as a clutch by decoupling from an upright and rotatable smooth drive shaft during abrupt downward driving of the pylon to avoid damage to the internal components of the arrangement. A sealing arrangement is provided for preventing the entry of debris into the interior of the pylon arrangement, and a heating unit is provided for preventing seizure of the arrangement during harsh weather conditions.
    Type: Grant
    Filed: August 4, 2000
    Date of Patent: September 30, 2003
    Assignee: National Sign & Signal Co.
    Inventor: Dwight David Johnson
  • Publication number: 20030025382
    Abstract: A wheel ballast device including at least two hollow ballast chambers, each of which defines an interior cavity therein. A movable medium is contained within each of the interior cavities and is freely movable within the respective ballast chamber. An attachment device is provided to secure the ballast chambers to the wheel.
    Type: Application
    Filed: July 26, 2002
    Publication date: February 6, 2003
    Inventor: Dwight David Johnson
  • Patent number: 5713222
    Abstract: A fabric washing machine includes a container to receive water and fabrics to be washed in the water and an unitary inlet member for supplying water to the container. The inlet member includes a flexible conduit section connected to a source of water and a nozzle section with one end connected in fluid flow relationship with the conduit section. The nozzle section has spaced apart top and bottom walls joined by spaced apart side walls. The distance between the side walls becomes larger in the direction away from the conduit section. The top wall has a downwardly curved distal end portion remote from the conduit section and the bottom wall terminates generally adjacent the position at which the downwardly curved portion of the top wall begins.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: February 3, 1998
    Assignee: General Electric Company
    Inventor: Dwight David Johnson