Patents by Inventor Rolf James Slater Christensen

Rolf James Slater Christensen 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: 5743309
    Abstract: A joining tool for automatically joining or intertwining two or more items, preferably reinforcement rods (23). The joining tool advances a joining wire (6) in a not predetermined length through a track (5) in a ring-shaped head (2). The advancing movement of the joining wire (6) stops when the wire has completed the turn and the wire is then held at its free end by a holding pin (10) whereupon it is pulled back until it is tight around the reinforcement rods (23). Upon tightening the joining wire (6) is held by another holding pin (12) whereupon two cutting sleeves (14 and 15) cut the joining wire (6). After cutting, a turning head (7) is rotated until the desired joining strength is obtained. The desired joining strength is determined by a U-shaped brace (19). When the desired joining strength has been obtained, the joining wire is released by the holding pins (10 and 12).
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: April 28, 1998
    Inventor: Rolf James Slater Christensen