| CALDWELL MANUFACTURING COMPANY, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20080236046 | Tamper Proof Locking Device for Window Balance Carriers - A tamper proof interlock insert for window balance carriers that is non-permanently installed into a drop-in carrier to prevent the unauthorized removal of the sash from the window frame. The interlock insert is inserted into the channel by the window manufacturer after the pivot bar, which connects to the sash, has been inserted into the carrier. Once the interlock insert is installed in the carrier, the pivot bar cannot be removed. Since the interlock insert is non-permanently installed in the carrier it can be disengaged from the carrier relatively easily by a trained technician in the event that the sash must be removed from the window for repair or replacement. | 10-02-2008 |
| 20080235905 | Pre-Tension Anchorage for Spiral Balance - A method and device for applying a pre-tensioned force to a spiral window balance. The spiral balance includes a containment tube, a spiral rod and a torsion spring that traverses the length of the containment tube. The device includes a pre-tensioning insert that is contained within an anchorage fixed within the upper end of the containment tube. At least one boss formed at the base of a bore within the pre-tensioning insert defines a channel that receives the upper end of the spiral rod. To apply a pre-tensioned force to the spiral balance, the lower end of the spiral rod is pulled from the lower end of the containment tube, turned a number of revolutions and reinserted into the containment tube without being allowed to rotate. The upper end of the spiral rod is non-rotatably retained within the channel by the boss to prevent it from losing its pre-tensioned force. | 10-02-2008 |
