Patents by Inventor Allen Barta

Allen Barta 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).

  • Patent number: 5419533
    Abstract: A lifting device for lifting heavier loads is disclosed including a square base plate having a plurality of wheels attached in triangular arrangement which provide a low center of gravity for the lifting device. Mounted in the center of the square base plate is a cylindrical housing having a sealed tube within an unsealed tube, a space between the tubes, a fluid holding chamber, a fluid filed chamber, a fluid filled space, a plurality of hydraulic seals, an orifice between the fluid filled space and the fluid holding chamber, a plurality of orifices in the bottom aspect of the fluid holding chamber and a plurality of external connections, an orifice in the top aspect of the fluid holding chamber between the fluid holding chamber and the operating chamber, a tube in the fluid holding chamber for transferring pressurized hydraulic fluid to the operating chamber, and a piston assembly having an operating chamber which is slidable longitudinally in the cylindrical housing.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: May 30, 1995
    Assignee: BFJ Company
    Inventors: Allen Barta, Vic Stark