Patents by Inventor Johannes H. M. Van Helmond

Johannes H. M. Van Helmond 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).

  • Scaffolding construction, in particular means for joining two or more of its posts in vertical position
    Patent number: 5462134
    Abstract: A scaffolding construction used particularly for H-shaped frames. The posts f a frame are provided at one end with a bushing, of which the inner diameter is larger than the outer diameter of the post (1). The bushing is provided with a recess and a staggered groove lying opposite to the recess. The end of another post is provided with a pin (14) which can be fittingly received through the groove and recess (7) in bushing (5). During assembly the post is placed in a position, such that its pins (14) are inserted through the groove via the recesses. During the angular rotation of the post into its vertical position, the pins are guided by the grooves and supported by the recesses, so that the pins come to rest in the posts.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: October 31, 1995
    Assignee: SGB Holdings Ltd. for These Research & Development Dept. Holland
    Inventor: Johannes H. M. Van Helmond