Patents by Inventor Melvin N. Ackerman

Melvin N. Ackerman 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).

  • Apparatus for lifting a flexible cable
    Patent number: 4423852
    Abstract: In mining operations, a number of mining machines will have flexible cable attached thereto which then drag along behind the machine as it operates. When the machine moves in a backward direction, the machine often times will run over and damage the cable. In the past, the cable has been moved manually to prevent damage. The disclosed invention provides an automatic device which will lift a predetermined length of cable above the groun so that the cable will not be cut as the machine moves backward a given distance.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: January 3, 1984
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: George J. Conroy, Melvin N. Ackerman