Patents Assigned to John Edward Jennings
  • Patent number: 4736641
    Abstract: An improved straight line motion gate mechanism which translates gate position to an open/closed position without any perceptible vertical motion and without any moving contact with either the ground or the use of a track. The gate may assume a wide range of widths and the mechanism may be self locking in the closed and open positions. A very small vertical motion of the mechanism provides for minimal input energy requirements and is relatively insensitive to gate weight.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: April 12, 1988
    Assignee: John Edward Jennings
    Inventor: James B. Reid
  • Patent number: 4503723
    Abstract: The invention comprises a gate or other load operator which provides non-linear torque/angular velocity characteristics over approximately a ninety degree gate travel range wherein the torque/velocity characteristic is reversed for opening and closing. The mechanism, a dual four-bar linkage with slotted pivots, provides high starting torque and lower running torque regardless of whether the gate or load is opening or closing. The mechanism is not constrained to be located on a particular side of the gate post.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: March 12, 1985
    Assignee: John Edward Jennings
    Inventor: James B. Reid