| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 049445000 | With counterbalance | 6 |
| 20080295411 | Weight Compensation Device for a Lifting Door - The invention relates to a weight compensation device ( | 12-04-2008 |
| 20090260295 | Frictional Drop Resistance for Sash Counterbalanced by Curl Springs - Window sash counterbalances using curl springs and holders can increase resistance to sash drop without causing sash hop by using a high coefficient of friction bearing surfaces against which curled up coils of curl springs slide when uncurling or re-curling. The higher friction bearing material produces more frictional resistance to spring uncurling than to spring re-curling and thus resists drop without causing hop. This allows a wider range of sash weights to be counterbalanced by a fewer number of counterbalance forces, saves manufacturing cost. | 10-22-2009 |
| 20110113695 | SASH WINDOW RESTRICTOR - A sash window restrictor ( | 05-19-2011 |
| 20120167474 | DOOR COMPRISING A DRIVE SYSTEM - A weight compensation system is provided for a motor driven door having a door leaf that is driven by a mechanism inside guide rails on a side of the door leaf to move the door between an opened position and a closed position. The weight compensation system includes a weight-compensation device comprising a cable unit and a spring unit arranged at least on one side of the door leaf, wherein the cable unit comprises a single cable. A cable-tension compensation device at which the single cable is deflected creates two cable strands that are secured against breakage within the cable-tension compensation device. The cable-tension compensation device is positioned locally fixed or secured to the door leaf so that two cable strands move at a distance to each other, and the exposed ends of the cable are guided together and attached to the door leaf or are positioned locally fixed, respectively. | 07-05-2012 |
| 20140208655 | SASH CAM FOR SIDE LOAD WINDOW BALANCE SYSTEM - A sash cam for a window sash having a base adapted to be secured to a window sash, a cam positionable in a stored position and an engaged position, and a pivot for joining the cam and the base. The pivot is adapted to hold the cam in at least one of the stored position and the engaged position. When in the stored position, a depth of the cam is at least one of less than and equal to a depth of the base. | 07-31-2014 |
| 20140259944 | FENESTRATION UNIT WITH SASH RETENTION - A fenestration unit, such as a window, having an upper sash and a lower sash can be configured to permit separate and independent movement of the upper sash and the lower sash when desired, while restraining the upper sash from movement caused by movement of the lower sash. A fenestration unit having a single movable sash can also be configured to provide securement of the single movable sash against undesired vertical movement. | 09-18-2014 |
