Patents by Inventor Leonard Gelfand

Leonard Gelfand 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: 4196960
    Abstract: A cable lug of the offset bar type for flush mounting on flat contact surfaces including a flat lug having a cropped and sharply upturned end abutting the end of the offset cable, and a cast weld sleeve surrounding the upturned end and the adjacent end portion of the cable securing them together, and a method for making the same.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: April 8, 1980
    Assignee: Erico Products, Inc.
    Inventor: Leonard Gelfand
  • Patent number: 4043893
    Abstract: An improved aluminum electrode hanger contact and method of making the same, which includes a longitudinal hole drilled in the end of the hanger. In one embodiment, a slot or slots are cut in such bar into the hole. Tin-coated copper inserts are inserted in the slot or slots with the inner ends thereof projecting into the hole and the outer ends closely underlying or projecting from the end of the hanger. In other embodiments, circular passages are provided transversely of the drilled hole and inserts in the form of tin-coated copper rod or rods are inserted in the passages. Superheated molten metal is permitted to flow into the hole filling the same, such molten metal preferably being obtained by the ignition of an aluminothermic welding composition. When the molten metal solidifies, the inserts are secured to the hanger, thus providing a low cost and significantly improved voltage drop contact between the aluminum hanger and a conductor.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: August 23, 1977
    Assignee: Erico Products, Inc.
    Inventor: Leonard Gelfand