Patents Assigned to Prototype Development Corp.
  • Patent number: 5678737
    Abstract: A vented liquid dispenser with a gravity feed of liquid from an inverted bottle includes a cup-shaped body having a center tube extending through an opening in the bottom of the cup-shaped body. A hollow tubular valve member is slidably mounted on the tube and a washer is secured to the lower end of the valve member in sliding sealing engagement with the tube and movable into and out of engagement with a seat surrounding the opening in the cup-shaped body. A lifter extending axially through the valve body has a vent closure at one end engageable with the valve member to seal the valve member with the opposite end engaged by a pivoted handle on the cup-shaped body. A single spring is connected between the lifter, the valve member and the tube for controlling the closing of the vent closure and the closing of the opening in the cup-shaped body.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: October 21, 1997
    Assignee: Prototype Development Corp.
    Inventor: Jonathan Z. White