Patents by Inventor John E. Williams, deceased

John E. Williams, deceased 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).

  • Dispenser with compressible piston assembly for expelling product from a collapsible reservoir
    Patent number: 5238150
    Abstract: A spray dispenser comprises a container in which a product-containing bellows is situated above an energy storing bellows. A piston is disposed within the container below the energy storing bellows. A sleeve surrounds the container and is threadedly connected with the piston whereby rotation of the sleeve relative to the container causes the piston to rise and compress the energy storing bellows. The energy storing bellows thus pressurizes the product-containing bellows to expel the product when the valve is opened. The outer diameter of the bellows is of progressively reduced diameter to enable the bellows segments to become more snugly nested within one another when collapsing.
    Type: Grant
    Filed: June 19, 1991
    Date of Patent: August 24, 1993
    Assignee: William Dispenser Corporation
    Inventor: John E. Williams, deceased