Patents by Inventor Albert J. Havenga, Jr.

Albert J. Havenga, Jr. 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).

  • Lock mechanism
    Patent number: 4996855
    Abstract: A security lock mechanism for use with a hook-up of a roll-off skid. The hook-up includes at least one plate having an opening formed in it for engagement by a coupler of a hoist truck. The lock mechanism comprises a first part shaped to be positioned closely adjacent the plate, and a second part shaped to extend through the opening of the plate and to be connected to the first part. A lock interconnects the first and second parts for securing them together and to the hook-up.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: March 5, 1991
    Inventors: Robert B. Havenga, Albert J. Havenga, Jr.