Lift slide counterbalance gear mechanism heavy doors counterbalance features.
Sliding door counterbalance.
The only problem is if the door actually closes shut though i could probably find a simple way of keeping the latch bolt of the door knob simply jamming it with a small piece of wood comes to mind.
No excessive force required to lift.
The todco counterbalance is calibrated to the door s weight and size to ensure reliable smooth operation.
A slidable counterbalance assembly adapted for a sash window assembly disposed within a master frame is disclosed.
By carefully controlling the release of spring energy to counteract the pull of gravity the counterbalance holds the lid open and balances the load in every intermediate position.
Counterbalanced mechanism assists with lifting and lowering heavier door panels up to 1 600 lbs we custom configure your counterbalance mechanism see part numbers tab for details allowing you to easily operate heavy doors.
Unfortunately my door is a bit heavier it is an old wooden door but i ve oiled the hinges so it does open and close quite smoothly.
The counterbalance is one of the key strengths of a todco roll up door and not just because it provides the lift.
Contact the todco customer serviceteam to find the best fit for your application.