Patents by Inventor Edward Chi

Edward Chi 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).

  • Slackless, resilient drawbar system for a railway car
    Patent number: 5131548
    Abstract: A slackless drawbar system for a railway car in which there is provided an elastomeric pad that absorbs forces during buffing conditions and helps to maintain the slackless nature of the system. The elastomeric pad absorbs forces during lateral and vertical angling and serves to maintain the slackless nature of the system during these conditions. Preloading of the resilient elastomeric pad is provided by means of an adjustable wedge element, which wedge element is adjustably positionable relative to the elastomeric pad by means of a screw shaft and nut, whereby the initial loading of the pad may be achieved to meet any required operating conditions and to accommodate wear and tear.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: July 21, 1992
    Assignee: National Castings, Inc.
    Inventor: Edward Chi