Patents Assigned to Design Research & Development Corp.
  • Patent number: 7367547
    Abstract: Provided is a lifting device comprising: a hook or clip; secured to the hook or clip, one or more first pulleys; a second hook or clip; secured to the second hook or clip, (i) a release mechanism comprising a second pulley and a releasable lock for an engaged flexible serpentine article and, optionally, (ii) one or more third pulleys, the second and third pulleys collectively the beta pulleys; and the flexible serpentine article engaged, at a first end, to one or the other hook or clip, and serially engaged through the first pulleys and beta pulleys, to provide a nominal two-fold or greater mechanical advantage, wherein the other end of the serpentine article is last engaged, among above recited elements, by one of the first pulleys.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: May 6, 2008
    Assignee: Design Research & Development Corp.
    Inventor: Stephen J. Plzak
  • Patent number: 6875051
    Abstract: Provided is an electrical distribution device having three or more lateral surfaces, wherein at least two lateral surfaces are adjacent pyramidal surfaces, wherein each such adjacent pyramidal surface comprises a directionally biased power receptacle, wherein each such adjacent pyramidal surface is adapted to direct a bulky end of a transformer fitted therein downwards or in a lateral direction; wherein for downwardly-biased pyramidal surfaces, the portion of the pyramidal surface below the power receptacle is adapted to accommodate about two inches or more of a bulky end of a transformer fitted in the power receptacle; wherein laterally-biased pyramidal surfaces are adapted so that any transformer that extends over an edge of the relevant pyramidal surface towards an adjacent pyramidal surface so extends at an angle such that a transformer of high primary bulk could still be accommodated fitted into the biased power receptacle at such adjacent pyramidal surface.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: April 5, 2005
    Assignee: Design Research and Development Corp.
    Inventor: Stephen J. Pizak
  • Patent number: D541190
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: April 24, 2007
    Assignee: Design Research & Development Corp.
    Inventor: Stephen J. Plzak
  • Patent number: D543440
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: May 29, 2007
    Assignee: Design Research & Development Corp.
    Inventor: Stephen J. Plzak