Patents by Inventor Jerzy Welnic

Jerzy Welnic 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).

  • Safety device for escalators
    Patent number: 5819902
    Abstract: An arrangement is provided for monitoring at least one of raising and lowering of individual steps of a band of steps of an escalator The escalator includes guide rails for the steps, a driving gear, and endless driving chains provided in a region of balustrade bases and being driven by the driving gear. The guide rails have a transition curve from a horizontal run to a vertical run. Each step includes rollers supported on the guide rails and is held between the endless driving chains. A safety device is disposed essentially in the transition curve for switching off the driving gear.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: October 13, 1998
    Assignee: O&K Rolltreppen GmbH & Co. KG
    Inventors: Klaus Schoneweiss, Jerzy Welnic