Patents by Inventor Albert W. Lindberg, Jr.

Albert W. Lindberg, 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).

  • Patent number: 4716987
    Abstract: There is provided an improved securement device for a swimming pool ladder having tubular ladder rails which is hingedly connected to an anchor mounted in the swimming pool deck which permits quick detachment and reattachment of the swimming pool ladder to the anchor. Each securement device includes a ferrule capping the end of the tubular ladder rail adjacent the pool deck which is hingedly connected to the respective anchor in the pool deck, an expandable locking mechanism coupled to the ferrule and extending into the tubular ladder rail having a resilient cylindrical member which expands radially upon being compressed into locking engagement with the inside wall of the tubular ladder rail.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: January 5, 1988
    Inventor: Albert W. Lindberg, Jr.
  • Patent number: 4552245
    Abstract: There is provided a securement device for a swimming pool ladder having tubular ladder rails which are hingedly connected to anchors mounted in the swimming pool deck which permits quick detachment and reattachment of the swimming pool ladder to the anchors. Each securement device includes a ferrule capping the end of the tubular ladder rail adjacent the pool deck which is hingedly connected to the respective anchor in the pool deck, an expandable locking mechanism coupled to the ferrule and extending into the tubular ladder rail which expands into locking engagement with the inside wall of the tubular ladder rail and which is expanded and relaxed by a device associated with the ferrule.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: November 12, 1985
    Inventor: Albert W. Lindberg, Jr.