Patents by Inventor Frank H. Firek

Frank H. Firek 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).

  • Hydraulic cylinder for automotive steering systems and the like
    Patent number: 5085131
    Abstract: An automotive steering system hydraulic cylinder and method for making the cylinder are disclosed. The cylinder is attached to a rack and pinion gear assembly housing so that a piston from the assembly creates a variable displacement chamber within the cylinder. The cylinder features a smooth interior surface to provide a sealing surface with the piston and an end that has been closed by spin-forming. The method provides a means of easily fabricating such a cylinder.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: February 4, 1992
    Assignee: Prime Tube, Inc.
    Inventors: Brian F. Barrett, Frank H. Firek