Patents by Inventor Anthony M. DiVitto

Anthony M. DiVitto 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).

  • Pump dispenser having a plunger seal
    Patent number: 6315162
    Abstract: The dispenser comprises a plunger operating in a hollow body. The body has formed adjacent its upper end with an inward and downward annular flap. Below the flap is a vent hole. The plunger stem has a tapered zone leading to a greater diameter above the tapered zone. When the plunger is in its lockdown position, the flap cooperates with the greater diameter to provide a vent seal. The flap is backed by an outward step in the diameter of the body.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: November 13, 2001
    Assignee: Owens-Illinois Closure Inc.
    Inventors: Leonora M. Brozell, Richard C. Sayers, Anthony M. DiVitto
  • Pump dispenser having a plunger seal
    Patent number: 6173863
    Abstract: The dispenser comprises a plunger operating in a hollow body. The body has formed adjacent its upper end an inward and downward annular flap. Below the flap is a vent hole. The plunger stem has a tapered zone leading to a greater diameter above the tapered zone. When the plunger is in its lockdown position, the flap cooperates with the greater diameter to provide a vent seal.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: January 16, 2001
    Assignee: Owens-Illinois Closure Inc.
    Inventors: Leonora M. Brozell, Richard C. Sayers, Anthony M. DiVitto